JP6408808B2 - Electric compressor - Google Patents

Description

  The present invention relates to a vibration reduction structure suitable for application to a rotary compressor including an accumulator as an auxiliary machine, for example.

As shown in FIG. 10, the rotary compressor used in the refrigeration apparatus includes a cylindrical cylinder 102 having an inner wall surface inside a sealed container 101 and a piston rotor provided eccentrically with respect to the center of the cylinder 102. 103. The piston rotor 103 is fixed to a main shaft 104 provided along the central axis of the cylinder 102. The main shaft 104 is provided so as to be rotatable around its central axis via an upper bearing 105A and a lower bearing 105B fixed to the cylinder 102. A rotor 106 A of an electric motor 106 is fixed to the main shaft 104. A stator 106B fixed to the inner peripheral surface of the sealed container 101 is disposed on the outer peripheral side of the rotor 106A. When the stator 106B is energized, the main shaft 104 is rotationally driven together with the rotor 106A, and the piston rotor 103 is moved to the cylinder 102. Swivel inside.
The rotary compressor sucks refrigerant into a compression chamber formed between the cylinder 102 and the piston rotor 103, and compresses the refrigerant by reducing the volume of the compression chamber by the rotation of the piston rotor 103. The rotary compressor gas-liquid-separates the refrigerant with the accumulator 108 and then sucks and compresses the refrigerant.
In the rotary compressor, vibration is generated as the main shaft 104 is rotated by driving the electric motor 106. For example, the vibration is transmitted to the sealed container 101 and the accumulator 108 in order, and noise may be generated.

Patent Document 1 discloses a rotary compressor that reduces noise and vibration generated when an accumulator is vibrated.
In Patent Document 1, a connection portion (22, 22A) for attaching the accumulator to the outer peripheral surface of the sealed container (1) is partially joined to the outer peripheral surface of the sealed container (1), and the pair of legs. The part (22A) is joined to the outer peripheral surface of the accumulator (2). And the leg part (22A) is extended outside so that it may become the range of 26 degrees-45 degrees with respect to the straight line which connects the center of an airtight container (1), and the center of an accumulator (2).
Patent Document 1 can reduce the increase in noise and vibration due to resonance of the accumulator (2) by reducing the tangential component of vibration propagation from the compressor to the accumulator (2) by providing the above configuration. States that.

JP 2013-119817 A (FIGS. 1 and 3)

By the way, although patent document 1 has fixed both between the airtight container (1) and a connection part (22,22A) and between an accumulator (2) and a connection part (22,22A) by welding. The accumulator can also be attached by winding and locking a metal band around the accumulator and fixing it with a fastener such as a screw or bolt.
Therefore, the present invention provides a mounting structure that can reduce the propagation of vibration from a vibration source to an auxiliary device in a structure in which, for example, an accumulator that is an auxiliary device to the compressor is attached to a compressor that is a vibration source using a band. For the purpose.
Moreover, this invention aims at providing the rotary compressor which can reduce the vibration of an accumulator by providing such an attachment structure.

For this purpose, the present invention is a structure in which an accessory is attached to a container that accommodates a vibration source by an attachment, and the attachment surrounds and holds one of the container and the accessory. A holding band having a first connection end and a second connection end, a first connection portion fixed to one of the container and the auxiliary machine and connected to the first connection end of the holding band, and a holding band A bracket including a second connection portion connected to the second connection end, and a buffer layer interposed between the holding band and the connection portion of the bracket are provided.
According to the mounting structure of the present invention, it is possible to avoid contact between metals that easily propagate vibrations at the connection portion between the holding band and the bracket, so that propagation of vibrations from the container to the auxiliary machine can be reduced.

  In the mounting structure of the present invention, it is preferable that a sheet-like cushioning material is interposed between one of the container and the auxiliary machine and the holding band. By doing so, it is possible to reduce the propagation of vibration from the holding band toward one of the container and the auxiliary device.

  In the mounting structure of the present invention, it is preferable that a damping structure is provided in the free region of the holding band. By doing so, the propagation of vibrations through the holding band can be reduced.

In the mounting structure of the present invention, both the connection between the first connection end of the holding band and the first connection portion of the bracket and the connection between the second connection end of the holding band and the second connection portion of the bracket are performed by locking. In such a case, it is preferable that a vibration damping structure is provided in the free region facing both the first connection end and the second connection end.
By providing the region where the damping structure by locking is provided at both the first connection end and the second connection end, the range where the free region is provided is widened compared with the case where it is provided on one side, and the range where the damping structure is provided is widened. By doing so, the damping function in the holding band is improved.

In the mounting structure of the present invention, when the vibration source is an electric motor and the bracket is joined by welding, the bracket is preferably fixed to the auxiliary machine.
When joining the bracket to the container that houses the electric motor by welding, avoid at least the position where the electric motor is housed so as not to hinder stable rotation of the electric motor due to heat distortion occurring in the container due to welding. It is necessary to join the bracket. On the other hand, if the bracket is joined to the side of the auxiliary machine that does not contain the electric motor by welding, the position for welding the bracket can be determined without being restricted by the position of the electric motor. If it does so, the attachment structure including a bracket can be provided in the position where vibration is hard to transmit, for example, the node of vibration.

  In the mounting structure described above, the structure in which the damping structure is provided in the free region of the holding band, and the structure in which the bracket is fixed to the auxiliary machine by welding when the vibration source is an electric motor are the connection parts of the holding band and the bracket. This is independent of the configuration in which the buffer layer is interposed between the two. The same applies to the electric compressor described below.

In the mounting structure described above, the electric motor and the compression mechanism that is rotationally driven by the electric motor are housed in a sealed container whose outer shape is substantially cylindrical, and the accumulator is mounted on the outer peripheral surface of the sealed container by a mounting tool. It can be applied to an electric compressor.
The fixture applied to the electric compressor includes a holding band having a first connection end and a second connection end, surrounding and holding one of the sealed container and the accumulator, and the other of the sealed container and the accumulator. A bracket having a first connection portion connected to the first connection end of the holding band and a second connection portion connected to the second connection end of the holding band, and the holding band and the bracket And a buffer layer interposed in the connection portion.

According to the mounting structure of the present invention in which the buffer layer is interposed at the connection portion between the holding band and the bracket, it is possible to reduce the propagation of vibration from the container housing the vibration source to the auxiliary machine.
Further, the propagation structure of the present invention in which the vibration control structure is provided in the free region of the holding band can also reduce the propagation of vibration from the container housing the vibration source to the auxiliary machine.
Furthermore, when the vibration source is an electric motor and the bracket is fixed by welding, the bracket is fixed to the accessory. According to the mounting structure of the present invention, the mounting structure is provided at an arbitrary position that is least susceptible to vibration. Therefore, the propagation of vibration from the container accommodating the vibration source to the auxiliary machine can be reduced.

It is sectional drawing which shows the structure of the rotary compressor which concerns on 2nd Embodiment of this invention. It is a front view which shows the accumulator with which the rotary compressor of FIG. 1 is provided. It is a top view which shows the vicinity of the accumulator of the rotary compressor of FIG. 1 shows a bail strap used to fix an accumulator to the rotary compressor of FIG. 1, (a) is a side view, (b) is a front view, (c) is an enlarged view of a portion 5c of (a), (d ) Is an enlarged view of the 5d portion of (a). It is a three-plane figure which shows the bracket used in order to fix an accumulator to the rotary compressor of FIG. 1, (a) is a front view, (b) is a side view, (c) is a top view. It is a top view which shows the vicinity of the accumulator of the rotary compressor which concerns on 2nd Embodiment of this invention. (A) is the elements on larger scale of FIG. 6, (b) is a figure which shows the method of comprising a damping structure. It is a top view which shows the vicinity of the accumulator of the rotary compressor which concerns on the modification of 2nd Embodiment. The vicinity of the accumulator of the rotary compressor which concerns on 3rd Embodiment of this invention is shown, (a) is a figure which decomposes | disassembles and shows a structural member, (b) is the figure by which the structural member was assembled | attached to the predetermined position. . It is sectional drawing which shows the structure of the conventional rotary compressor.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
[First Embodiment]
Hereinafter, a rotary compressor 1 according to a first embodiment of the present invention will be described.
The compressor 1 fixes the accumulator 14 to the sealed container 11 using a bail strap 60 that is a metal band, but adopts a structure that reduces the propagation of vibration from the sealed container 11 to the accumulator 14 via the bail strap 60. doing.
Hereinafter, the configuration of the compressor 1 will be described, and then the operation and effect of the compressor 1 will be described.

[Configuration of Compressor 1]
As shown in FIG. 1, the compressor 1 is a so-called two-cylinder type rotary compressor in which disk-shaped cylinders 20 </ b> A and 20 </ b> B are provided in two upper and lower stages inside a cylindrical sealed container 11.
A cylindrical cylinder inner wall surface 20S is formed in each of the cylinders 20A and 20B. Cylindrical piston rotors 21A and 21B each having an outer diameter smaller than the inner diameter of the cylinder inner wall surface 20S are arranged inside the cylinders 20A and 20B. The piston rotors 21 </ b> A and 21 </ b> B are inserted and fixed to the eccentric shaft portions 40 </ b> A and 40 </ b> B of the main shaft 23 along the central axis C of the sealed container 11, respectively. Thus, spaces R each having a crescent-shaped cross section are formed between the cylinder inner wall surfaces 20S of the cylinders 20A and 20B and the outer peripheral surfaces of the piston rotors 21A and 21B.
Here, the upper-stage piston rotor 21A and the lower-stage piston rotor 21B are provided so that their phases differ from each other by 180 °.
A disk-shaped partition plate 24 is provided between the upper and lower cylinders 20A and 20B. The partition plate 24 partitions the space R in the upper cylinder 20A and the space R in the lower cylinder 20B into the compression chamber R1 and the compression chamber R2 without communicating with each other.

The upper and lower cylinders 20A and 20B are provided with blades (not shown) for dividing the compression chambers R1 and R2 into two, respectively. The blade is held in an insertion groove formed extending in the radial direction of the cylinders 20A and 20B so as to be able to advance and retract in a direction approaching and separating from the piston rotors 21A and 21B.
The cylinders 20A and 20B have a discharge hole (not shown) for discharging the refrigerant at a predetermined position, and a reed valve (not shown) is provided in the discharge hole. When the pressure of the compressed refrigerant reaches a predetermined value, the reed valve is pushed open to discharge the refrigerant to the outside of the cylinders 20A and 20B.

As shown in FIG. 1, the main shaft 23 is rotatably supported around its central axis by an upper bearing 29A fixed to the cylinder 20A and a lower bearing 29B fixed to the cylinder 20B.
The main shaft 23 includes eccentric shaft portions 40A and 40B that are offset in a direction orthogonal to the central axis C of the main shaft 23. The eccentric shaft portions 40A and 40B have outer diameters slightly smaller than the inner diameters of the piston rotors 21A and 21B. Thus, when the main shaft 23 rotates, the eccentric shaft portions 40A and 40B rotate around the central axis C of the main shaft 23, and the upper and lower piston rotors 21A and 21B roll eccentrically in the cylinders 20A and 20B. At this time, the blade tip described above advances and retreats following the movement of the piston rotors 21A and 21B, and is always pressed against the piston rotors 21A and 21B.

The main shaft 23 extends upward from the upper bearing 29A, and a rotor 37 of an electric motor 36 for rotating the main shaft 23 is provided integrally with the protruding portion. Corresponding to the rotor 37, a stator 38 is fixed to the inner peripheral surface of the sealed container 11.
The upper bearing 29A has a discharge hole (not shown) that communicates with a discharge hole formed in the cylinder 20A, and the refrigerant that has passed through the cylinder 20A is discharged into the later-described muffler 45A through the discharge hole. Is done. Similarly, the lower bearing 29B includes a discharge hole (not shown) that communicates with a discharge hole formed in the cylinder 20B, and the refrigerant that has passed through the cylinder 20B passes through the discharge hole to form a muffler 45B described later. It is discharged inside.

As shown in FIG. 1, the compressor 1 has the muffler 45A attached to the upper bearing 29A and the muffler 45B attached to the lower bearing 29B. When the refrigerant that has passed through the upper bearing 29A and the lower bearing 29B flows into the muffler 45A and the muffler 45B, respectively, the pulsating component is removed. Refrigerant pulsating component is removed, the muffler 45A, through the discharge passage formed in the muffler 45B, flows upwardly of the sealed container 11.

  Openings 12A and 12B are formed on the side of the sealed container 11 at positions facing the outer peripheral surfaces of the cylinders 20A and 20B. In the cylinders 20A and 20B, suction ports 30A and 30B are formed at positions facing the openings 12A and 12B to communicate with a predetermined position on the cylinder inner wall surface 20S.

As shown in FIG. 1, in the compressor 1, an accumulator 14 that gas-liquid separates refrigerant before being supplied to the compressor 1 is fixed to the sealed container 11 via an attachment structure 50.
The accumulator 14 is provided with suction pipes 16A and 16B for letting the compressor 1 suck the refrigerant in the accumulator 14. The distal ends of the suction pipes 16A and 16B are connected to the suction ports 30A and 30B through the openings 12A and 12B.

The compressor 1 takes in the refrigerant from the suction cylinder 14a of the accumulator 14 into the accumulator 14, separates the gas in the accumulator 14, and separates the gas phase from the suction pipes 16A and 16B to the cylinders 20A and 20B. The air is supplied to the compression chambers R1 and R2 that are the internal spaces of the cylinders 20A and 20B via the suction ports 30A and 30B.
Then, when the piston rotors 21A and 21B roll inside the cylinders 20A and 20B, the volumes of the compression chambers R1 and R2 gradually decrease and the refrigerant is compressed. The compressed refrigerant passes through the upper bearing 29A and the muffler 45A on the side of the cylinder 20A, and passes through the lower bearing 29B and the muffler 45B on the side of the cylinder 20B. It is discharged to the outside of the muffler 45A and the muffler 45B. After passing through the electric motor 36, the refrigerant is discharged to a pipe constituting the refrigeration cycle via a discharge cylinder 42 provided in the upper part.

The accumulator 14 is fixed to the sealed container 11 by the mounting structure 50 in addition to being attached to the sealed container 11 of the compressor 1 via the suction pipes 16A and 16B.
As shown in FIG. 1, the attachment structure 50 includes a bail strap 60 wound around the accumulator 14, a bracket 70 fixed to the sealed container 11, and a sheet-like shape interposed between the bail strap 60 and the sealed container 11. And a cushioning material 75 made of rubber.

As shown in FIGS. 3 and 4, the bail strap 60 includes a locking connection end 62 in which one end is folded back in a U-shape, a fastening connection end 63 in which the other end is folded in an L-shape, And a tightening portion 61 that occupies between the locking connection end 62 and the fastening connection end 63. The locking connection end 62 is inserted into a locking groove 723 provided in the bracket 70, thereby fixing one end of the bail strap 60 to the bracket 70. Further, the fastening connection end 63 is fastened to the bracket 70 via the bolt B, whereby the other end of the bail strap 60 is fixed to the bracket 70. A bolt hole 64 (FIG. 4B) through which the bolt B passes is formed in the fastening connection end 63. When the locking connection end 62 and the fastening connection end 63 are fixed to the bracket 70, the tightening portion 61 tightens the accumulator 14 while being wound around the accumulator 14.
In addition, the bail strap 60 is produced in the shape shown in FIG.3 and FIG.4 by the sheet metal process which punches and bends a metal plate. The same applies to the bracket 70.

The bail strap 60 includes a buffer layer 62S and a buffer layer 63S on each of the locking connection end 62 and the fastening connection end 63. The buffer layer 62S and the buffer layer 63S are made of, for example, a buffer material made of natural or synthetic rubber, synthetic resin, etc., and can be formed by sticking a sheet-like buffer material, or after applying a gel adhesive It can be formed by curing.
Buffer layer 62S of locking connecting end 62 is provided on the inner peripheral surface _{60 IS} bail strap 60, as will be described later in detail, the engaging connecting end 62 is inserted into the locking groove 723 of the bracket 70 engaging connecting portions 72 If it is latched by, it will interpose between the latching connection end 62 and the bracket 70, and it will avoid that metals contact.
Buffer layer 63S of the fastening connection end 63 is provided on the inner peripheral surface 60 _IS bail strap 60, as will be described later in detail, the fastening connection end 63 by a bolt B is fastened to the bracket 70, a fastening connection end 63 Bracket Intervene between 70 to prevent contact between metals.

  As shown in FIGS. 3 and 5, the bracket 70 is provided at the front end of the welded joint 71 fixed to the sealed container 11 and the flanges 714 and 714 of the welded joint 71 to fix the bail strap 60. A locking connection portion 72 and a fastening connection portion 73 are provided.

After the bracket 70 is disposed at a predetermined position, the weld joint 71 is joined and fixed to the sealed container 11 by welding.
The welded joint 71 has a cross-sectional shape similar to that of channel steel, and includes a web 711 and flanges 714 and 714 that vertically rise from both ends of the web 711, respectively. The web 711 is curved so as to have the same curvature as the outer peripheral surface of the sealed container 11, and a pair of positioning protrusions 713 and 713 used for positioning with respect to the sealed container 11 are formed on the joint surface 712 with the sealed container 11. Are provided at intervals. The positioning projections 713 and 713 are fitted into positioning grooves (not shown) formed at predetermined positions on the outer peripheral surface of the sealed container 11 so that the bracket 70 is positioned.

Each of the locking connection portion 72 and the fastening connection portion 73 has a substantially L-shaped cross section, and corresponds to the locking connection end 62 and the fastening connection end 63 of the bail strap 60.
The locking connection portion 72 includes a first support portion 721 and a locking portion 722 formed by folding back from the tip of the first support portion 721. The first support portion 721 is a portion that contacts and supports the accumulator 14, and the surface that contacts the accumulator 14 has a curvature equivalent to that of the outer peripheral surface of the accumulator 14. The same applies to the second support portion 731 of the fastening connection portion 73. A locking groove 723 that locks the locking connection end 62 of the bail strap 60 is formed in the locking portion 722.
The fastening connection portion 73 includes a second support portion 731 and a fastening portion 732 that is formed by bending from the tip of the second support portion 731. The flat fastening portion 732 supports the fastening connection end 63 of the bail strap 60 in a stacked manner, and fastens the fastening connection end 63 by fastening the bolt B. The fastening portion 732 is formed with a screw hole 733 through which the bolt B penetrates and a female screw that meshes with the male screw of the bolt B is formed.
The flange 714, the first support portion 721, and the second support portion 731 of the bracket 70 are provided with elasticity. When these are elastically deformed, vibration energy is converted into heat energy, and vibration propagation can be reduced. .

As shown in FIGS. 1 and 2, the cushioning material 75 is wound around the accumulator 14 and is made of a sheet-like rubber. The cushioning material 75 is interposed between the accumulator 14 and the bail strap 60 to reduce the propagation of vibration from the bail strap 60 to the accumulator 14.
The cushioning material 75 surrounds substantially the entire circumference of the outer peripheral surface of the accumulator 14 and is held between the accumulator 14 and the bail strap 60 by being tightened from the periphery by the bail strap 60.

  The accumulator 14 is attached to the sealed container 11 by the mounting structure 50 including the bail strap 60, the bracket 70, and the cushioning material 75 described above. Specifically, as shown in FIGS. 1 to 3, the outer peripheral surface of the accumulator 14 is brought into contact with the first support portion 721 and the second support portion 731 of the bracket 70 joined to a predetermined position of the sealed container 11 by welding. . In this state, the locking connection end 62 of the bail strap 60 is fitted into the locking groove 723 provided in the first support portion 721 of the bracket 70, so that the locking connection end 62 is locked to the first support portion 721. . Next, the fastening connection end 63 of the bail strap 60 is overlapped with the fastening portion 732 of the second support portion 731 provided at the fastening connection portion 73 of the bracket 70. Then, the fastening part 61 of the bail strap 60 covers the periphery of the accumulator 14. Next, the bolt B through which the screw portion has passed through the bolt hole 64 is screwed into the screw hole 733 of the fastening portion 732. When the bolt B is screwed in until the head is seated on the fastening portion 732 and a necessary tightening force is obtained, the attaching operation of the accumulator 14 is completed.

Next, the effect of the compressor 1 will be described. This effect is an effect related to reducing the propagation of vibration generated based on the drive of the electric motor 36 on the main body side of the compressor 1 including the sealed container 11 to the accumulator 14.
In this embodiment, as shown in FIGS. 3 and 4, a buffer layer 62 </ b> S is provided at the locking connection end 62 of the bail strap 60, and the buffer layer 62 </ b> S is provided between the locking connection end 62 and the locking portion 722 of the bracket 70. Intervene. Further, a buffer layer 63S is provided at the fastening connection end 63 of the bail strap 60, and the buffer layer 63S is interposed between the fastening connection end 63 and the fastening portion 732 of the bracket 70. As described above, since the buffer layers 62S and 63S are interposed between the bail strap 60 and the bracket 70, the vibration transmission rate from the bracket 70 to the bail strap 60 decreases due to the vibration generated in the sealed container 11, and the accumulator 14 Vibration is reduced.

[Second Embodiment]
Next, the compressor 2 which concerns on 2nd Embodiment of this invention is demonstrated with reference to FIG.6 and FIG.7.
The basic configuration of the compressor 2 is the same as that of the compressor 1, and the same reference numerals as those of the compressor 1 are used in FIGS. 6 to 8 for the same configuration. The description will focus on the characteristic part of the compressor 2 as a point.

  As shown in FIGS. 6 and 7, the compressor 2 includes a damping structure 65 in the bail strap 60. The damping structure 65 is provided on the side where the locking connection end 62 of the bail strap 60 is provided, and is provided in the free region F where the accumulator 14 and the bracket 70 are not contacted and thus is not directly subjected to mechanical restraint. Here, it is assumed that the damping structure 65 is provided in the entire area of the free region F in the width direction W of the bail strap 60 (see FIG. 4B), but only in a partial region in the width direction W. A damping structure 65 can also be provided.

The damping structure 65 has the same structure as the damping steel plate.
The damping steel plate is a member having a structure in which a viscoelastic resin layer having a thickness of about several tens of μm is sandwiched between two steel plates, and vibration energy is generated by shear deformation of the viscoelastic resin layer accompanying bending vibration. The vibration damping effect can be obtained by converting into thermal energy.
The damping structure 65 is configured by adding a viscoelastic resin layer 67 and a steel plate 68 to the bail strap 60 that bears one of the two steel plates. That is, the damping structure 65 has a laminated structure in which the viscoelastic resin layer 67 is sandwiched between the bail strap 60 and the steel plate 68.
In order to obtain the damping structure 65, as shown in FIG. 7B, a damping structure preliminary body 66 in which a viscoelastic resin layer 67 and a steel plate 68 are laminated is prepared, and the viscoelastic resin layer 67 side is arranged. What is necessary is just to affix on the bail strap 60.
Here, although an example of providing a damping structure 65 to the outer peripheral surface _{60 OS} bail strap 60 may be provided in the inner peripheral surface _{60 IS,} on both sides of the outer peripheral surface _{60 OS} and the inner circumferential surface _{60 IS} It can also be provided.

In the present embodiment, since the damping structure 65 is provided in the free region F, even if the vibration from the bracket 70 is received, the vibration of the free region F is attenuated by the shear deformation of the viscoelastic resin layer 67 of the damping structure 65. Is done. Therefore, propagation of vibration to the accumulator 14 can be reduced.
In addition, although this embodiment showed the example which provides the damping structure 65 only in the free region F, the damping structure 65 can also be provided in the other region of the free region F. However, since the vibration damping effect of the vibration damping structure 65 is due to shear deformation of the viscoelastic resin layer 67, it is recommended that the vibration damping structure 65 is provided by selecting a portion where this action and effect can be obtained. Further, the vibration damping structure 65 can be provided not only on the bail strap 60 but also on the bracket 70 side.

In order to obtain the vibration damping effect by the damping structure 65 more effectively, the free region F may be widened and the damping structure 65 may be provided there. FIG. 8 shows an example in which the damping structure 65 is provided based on this viewpoint.
In the compressor 1 shown in FIG. 8, since the both ends of the bail strap 60 and the bracket 70 are fixed by locking, the free region F can be expanded twice as much as the example shown in FIG. 6. Therefore, by providing the damping structure 65 in each free region F, the vibration damping effect can be doubled.

  In addition, although 2nd Embodiment shown in FIGS. 6-8 has shown the example which is not provided with the buffer layers 62S and 63S of 1st Embodiment, the buffer layers 62S and 63S of 1st Embodiment are shown in 2nd Embodiment. Can also be applied.

[Third Embodiment]
Next, the compressor 3 which concerns on 3rd Embodiment of this invention is demonstrated with reference to FIG.
The basic configuration of the compressor 3 is the same as that of the compressors 1 and 2, and the same reference numerals as those of the compressors 1 and 2 are used for the same configuration in FIG. The description will focus on the characteristic part of the compressor 3 that is different from the above.

As shown in FIG. 9, the compressor 3 employs a configuration in which the bracket 70 is joined to the accumulator 14 while the bail strap 60 is wound around the sealed container 11.
The bail strap 60 and the bracket 70 follow the second embodiment. The bail strap 60 includes two locking connection ends 62 at both ends, and the bracket 70 includes two locking connection portions 72 at both ends. Yes.
In the bracket 70, the weld joint 71 is fixed to the accumulator 14 by welding. The bail strap 60 has a tightening portion 61 (not shown) wound around the sealed container 11, and the locking connection ends 62 and 62 are locked to the locking connection portions 72 and 72 of the bracket 70. The accumulator 14 is fixed to the sealed container 11.

  As described below, the compressor 3 according to the third embodiment is not subject to the restriction of the position in the height direction in which the bracket 70 is attached by welding, so that the vibration from the sealed container 11 to the accumulator 14 is most difficult to propagate. It is possible to provide the mounting structure 50 by selecting.

  As shown in FIG. 1, the sealed container 11 accommodates an electric motor 36 therein, and also has a function as a case of the electric motor 36. Therefore, in order to ensure stable rotation of the rotor 37, the sealed container 11 is particularly required to have a high roundness in a portion that houses the electric motor 36. When the bracket 70 is welded to the sealed container 11, heat distortion due to welding inevitably occurs in the sealed container 11. Therefore, in the first and second embodiments in which the bracket 70 is welded to the sealed container 11, the electric motor 36 is accommodated. The region A is removed and the bracket 70 is welded so that the region A is not affected by thermal strain.

As described above, when the bracket 70 is welded to the sealed container 11, the position in the height direction to be welded is restricted. However, this restriction on the welding position is not preferable in consideration of vibration propagation. That is, the region A of the sealed container 11 has high rigidity and the vibration amplitude tends to be small because the stator 38 of the accommodated electric motor 36 is fitted inside the sealed container 11. Therefore, if the bracket 70 is fixed within the range of the region A, vibrations are unlikely to propagate from the sealed container 11 to the bracket 70.
Therefore, in the present embodiment, the bracket 70 is welded to the accumulator 14 that is not adversely affected by thermal distortion caused by welding. Then, the bracket 70 can be fixed by welding by selecting a position where the amplitude of vibration tends to be small from the range of the wide area B including the area A shown in FIG. On the other hand, since the sealed container 11 is not thermally strained by welding, stable rotation of the electric motor 36 is ensured.

Further, the compressor 3 according to the third embodiment also has an effect of suppressing the magnitude of the exciting force input to the bracket 70 as described below by winding the bail strap 60 around the sealed container 11.
It is understood that the external excitation force F (F ₁ , F ₂ , F ₃ , F ₄ ) due to vibration generated in the sealed container 11 is generated approximately at the position shown in FIG. When these excitation forces F ₁ , F ₂ , F ₃ , and F ₄ are superposed and become a large excitation force, the vibration propagated to the accumulator 14 through the bracket 70 becomes large, so that the vibration of the accumulator 14 is suppressed. It is necessary to avoid the excitation forces F ₁ , F ₂ , F ₃ , and F ₄ from overlapping. While the bracket 70 is fixed to the accumulator 14 by welding, a configuration in which the bail strap 60 is wound around the closed container 11 having a diameter larger than that of the accumulator 14 is adopted, so that the distance between F ₁ and F _{2 and} the distance between F ₃ and F ₄ are obtained. Therefore, it is possible to suppress the superimposition of excitation force.

In the present embodiment, the outer diameter of the sealed container 11 around which the bail strap 60 is wound is larger than that of the accumulator 14. Therefore, as compared with the accumulator 14 to wind the bail strap 60, excitation force F ₁ and the distance D of the excitation force F ₂ is generated position, and, exciting force F ₃ and excitation force F ₄ is generated in the position The distance D can be increased by F ₃ , F ₄ ). Thus, by widely dispersing the intervals of the excitation forces F (F ₁ , F ₂ , F ₃ , F ₄ ), each excitation force is input to the bracket 70 in a state of being out of phase. Superposition of vibration forces can be avoided.

  In addition, although 3rd Embodiment shown in FIG. 9 has shown the example which is not provided with the buffer layers 62S and 63S of 1st Embodiment, and the damping structure 65 of 2nd Embodiment, The buffer layers 62S and 63S of the first embodiment and the vibration damping structure 65 of the second embodiment can also be applied.

As described above, the present invention has been described based on the first, second, and third embodiments. However, unless departing from the gist of the present invention, the configurations described in the above embodiments are selected or changed to other configurations as appropriate. Is possible.
In the above embodiment, the vibration source is an electric motor of a rotary compressor, and an example in which an auxiliary machine associated with the vibration source is an accumulator is shown, but the subject of the present invention is not limited to this, It can be widely applied to combinations of vibration sources other than rotary compressors and auxiliary machinery other than accumulators.
In addition, when applied to a rotary compressor, the specific configuration is not limited to that shown in the present embodiment, and is widely applied to a rotary compressor including a rotary compression mechanism, a sealed container, and an accumulator. can do.

1, 2, 3 Compressor 11 Sealed container 12A Opening 12B Opening 14 Accumulator 14a Suction cylinder 16A Suction pipe 16B Suction pipe 20A Cylinder 20B Cylinder 20S Cylinder inner wall surface 21A Piston rotor 21B Piston rotor 23 Main shaft 24 Partition plate 29A Upper bearing 29B Lower bearing 30A Suction port 30B Suction port 36 Electric motor 37 Rotor 38 Stator 40A Eccentric shaft portion 40B Eccentric shaft portion 42 Discharge cylinder 45A Muffler 45B Muffler 50 Mounting structure 60 Bail strap 60 _IS inner peripheral surface 60 _OS outer peripheral surface 61 Tightening portion 62 Locking connection End (first connection end)
62S Buffer layer 63 Fastening connection end (second connection end)
63S Buffer layer 64 Bolt hole 65 Damping structure 66 Damping structure preliminary body 67 Viscoelastic resin layer 68 Steel plate 68
70 Bracket 71 Welded joint 72 Locking connection (first connection)
73 Fastening connection (second connection)
75 Buffer material 711 Web 712 Bonding surface 713 Positioning projection 714 Flange 721 First support portion 722 Locking portion 723 Locking groove 731 Second support portion 732 Fastening portion 733 Screw hole B Bolt C Center axis R Space R1 Compression chamber R2 Compression chamber

Claims (6)

The electric motor and the compression mechanism that is rotationally driven by the electric motor are housed in an airtight container having a substantially cylindrical outer shape, and an electric compressor in which an accumulator is attached to the outer peripheral surface of the airtight container by a fixture. And
The fixture is
A holding band having a first connection end and a second connection end, surrounding and holding one of the sealed container and the accumulator;
A first connection portion that is fixed to one of the sealed container and the accumulator and that is connected to the first connection end of the holding band, and a second connection that is connected to the second connection end of the holding band. A bracket having a connection portion;
A buffer layer interposed in a connecting portion of the holding band and the bracket;
An electric compressor comprising: An electric compressor in which an electric motor and a compression mechanism that is rotationally driven by the electric motor are housed in a substantially cylindrical sealed container, and an accumulator is attached to the outer peripheral surface of the sealed container by a fixture. ,
The fixture is
A holding band having a first connection end and a second connection end, surrounding and holding one of the sealed container and the accumulator;
A first connection portion that is fixed to one of the sealed container and the accumulator and that is connected to the first connection end of the holding band, and a second connection that is connected to the second connection end of the holding band. A bracket having a connection portion;
A damping structure provided in a free region in the holding band;
An electric compressor comprising: A sheet-like cushioning material is interposed between one of the sealed container and the accumulator and the holding band,
The electric compressor according to claim 1. A damping structure is provided in a free region of the holding band.
The electric compressor as described in any one of Claims 1-3 . Both the connection of the first connection end of the holding band and the first connection portion of the bracket, and the connection of the second connection end of the holding band and the second connection portion of the bracket are locked. Done,
The damping structure is provided in the free region facing both the first connection end and the second connection end,
The electric compressor according to claim 4 . If the previous SL bracket is joined to the sealed container by welding, wherein the bracket is bonded to the accumulator,
The electric compressor as described in any one of Claims 1-5 .

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