JPH055483A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To prevent generation of vibration or the like by improving maintainability of upper/lower parts of a closed casing, especially a lower part side of a motor, and simultaneously suppressing deflection of a drive shaft. CONSTITUTION:A closed casing 9 is constituted of three members of a barrel body 91, top and a bottom 93. A housing 5, mutually removable through upper/ lower mounting parts 7, 8 to support a movable scroll and a motor 4 and further to center support a drive shaft 3, and a fixed scroll 1 are removable mounted respectively to the upper mounting part 7 and an upper part of the housing 5. Further, mounting and removal are made possible between the housing 5 and a lower part fixing plate 57 of closing a bottom part of the housing 5 to facilitate dust removal in a lower part of the motor 4. The drive shaft 3 is supported at both sides to suppress its deflection, and generation of vibration and noise is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type compressor which is used as a refrigerant compressor or the like in a refrigerator and can be freely disassembled and assembled.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3 of Japanese Patent Application Laid-Open No. 57-93601 and as shown in FIG. 3, a closed casing D has a two-member construction of a top A and a bottom B.
The bottom and the bottom B are configured to be attachable / detachable by connecting a bolt V via a mounting portion J composed of a pair of flanges, and a bearing portion that supports the movable scroll O and the motor M and supports the upper portion of the drive shaft S. A housing H having R is formed, and the housing H is detachably attached to the attachment portion J via a support leg E with a bolt W, and a fixed scroll F is detachably attached to an upper portion of the housing H. Then, the top A and the bottom B are separated and the housing H is removed so that maintenance of each part can be performed.

Incidentally, in FIG. 3, L is a suction pipe, and a cover body C whose open end is attached to the lower part of the housing H.
, And T is a discharge pipe.

[0004]

However, in the above, since the closed casing D has the two-member construction of the top A and the bottom B, the dust accumulated inside the cover body C below the motor M is removed. Also, when performing maintenance on the lower side of the housing H, it is necessary to remove the housing H from the mounting portion J and disassemble the whole body, which causes a problem of poor maintainability.

In the above, the drive shaft S is connected to the motor M.
Since the lower side of the drive shaft S is supported in a cantilever manner only through the bearing R on the upper side of the drive shaft S, the drive shaft S easily causes shaft runout and the like, and easily causes vibration and noise. There are also problems.

Further, with the above construction, since there is no sealing means around the connection port between the suction pipe L and the cover body C which is inserted from the side portion, leakage of intake gas easily occurs around this connection port, and the motor While the cooling effect is impaired, the suction gas interferes with the oil accumulated at the bottom, and the amount of oil lifted into the compression chamber defined between the scrolls F and O becomes excessive, and the oil that flows out through the discharge pipe T is discharged. There is also a problem that the amount of rise increases.

In the present invention, by devising the divided structure of the closed casing and the lower structure of the housing, firstly, the maintainability of the lower part of the motor can be improved, and at the same time, a scroll type compressor capable of preventing shaft runout of the drive shaft. Secondly, in addition to this, by further devising the structure of the connection part of the suction pipe, a scroll type compressor that can make the motor cooling good and reduce the oil rise amount The purpose is to provide.

[0008]

In the present invention, therefore, in order to achieve the first object, the fixed casing 1 and the movable scroll 2 are provided in the upper portion of the closed casing 9, and the drive shaft 3 is provided in the lower portion. In a scroll type compressor having a motor 4 incorporated therein, the casing 9 is composed of a body 91, a top 92 and a bottom 93, and between the body 91 and the top 92 and between the body 91 and the bottom 93. And an upper mounting portion 7 and a lower mounting portion 8 for connecting a detachable coupling body, respectively, and supporting the movable scroll 2 and the motor 4 and mounting the drive shaft 3 at a vertical position of the motor 4. Upper bearing 31 supporting both ends
An open bottom housing 5 having a lower bearing 32 is formed, and the housing 5 is detachably attached to the upper mounting portion 7, while the fixed scroll 1 is detachably attached to the upper portion of the housing 5, or , The body 91
A lower fixing plate 57 that closes the bottom of the housing 5 is fixed to the lower inside of the housing 5, and the fixing plate 57 and the housing 5 are coupled via a detachable coupling body.

Further, in order to achieve the above second object, in addition to the above construction, the suction pipe 6 is detachably attached to a side portion of the body 91 in the closed casing 9 and corresponds to the lower space of the motor 4. The side wall of the housing 5 is provided with a connection port 59 that receives the end of the suction pipe 6 in a freely attachable / detachable manner, and a seal body 60 is provided around the connection between the connection port 59 and the suction pipe 6. ..

[0010]

[Operation] By removing the top 92 from the body 91, maintenance of the upper side of the fixed scroll 1 can be performed.
Furthermore, by removing the top 92 from the body 91 and the fixed scroll 1 from the housing 5, maintenance of the compression chamber or the rotating portion of the movable scroll 2 which is to be defined between the scrolls 1 and 2 can be performed. ,
The top 92 is removed from the body 91 and the housing 5
The housing 5 by removing the
In addition, maintenance of the entire movable portion of the movable scroll 2 and the motor 4 supported by this can be performed. On the other hand, the body 91
By removing the bottom 93 from the bottom, maintenance of the bottom of the closed casing 9 can be performed. Further, the bottom 93 is removed from the body 91 and the lower fixing plate 57 is attached to the housing 5.
The lower part of the motor 4 can be maintained by removing it from the. Moreover, the drive shaft 3 is supported on both sides via the upper bearing 31 and the lower bearing 32 while the maintenance of the lower side as well as the upper side in the closed casing 9 can be easily performed, and the housing is supported at the upper position thereof. 5 is fixed to the body 91 via the upper mounting portion 7 and the housing 91 at the lower position via the housing 5 and the lower fixing plate 57, so that the supporting rigidity of the drive shaft 3 can be increased. ..

Further, by interposing the seal body 60 around the connection port of the suction pipe 6, the whole amount of the suction gas can be supplied to the motor 4, the cooling effect can be sufficiently exerted, and the suction gas and the bottom portion can be exerted. It is possible to prevent interference with the oil accumulated in the oil and reduce the amount of oil rise.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The scroll type compressor shown in FIGS.
On the upper part of the closed casing 9, a fixed scroll 1 in which a scroll body 12 and an outer peripheral wall 13 continuous with the scroll body 12 are integrally projected on a mirror plate 11, and a movable scroll 2 in which a scroll body 22 is integrally projected on a mirror plate 21 are opposed to each other. While combining and decorating in a shape,
The lower part includes a rotor 41 and a stator 42, and the rotor 4
1, a motor 4 in which the drive shaft 3 is connected via a key 43 and a fixing nut 44 is installed.

Then, an eccentric hole 30a is opened in a large-diameter crank pin portion 30 provided at the upper end of the drive shaft 3, and a boss projectingly provided on the lower surface of the movable scroll 2 through a rolling bearing 30b in the eccentric hole 30a. While fitting the portion 23, the movable scroll 2 is engaged with the Oldham ring 33 that constitutes a rotation preventing mechanism, and the movable scroll 2 is revolved with respect to the fixed scroll 1 by driving the motor 4, and the suction port of the spiral outer peripheral portion. The suction gas taken in from 14 is compressed in the compression chamber 15 defined between the spirals, and the compressed gas is taken out from the discharge hole 16 at the center of the spiral through the discharge pipe 97 to the outside.

With the above construction, the casing 9 is composed of a cylindrical pipe-shaped body 91, a top 92 composed of a dome-shaped lid body 92a and a cylindrical body 92b integrated with the lid body 92, and a thick base plate. The bottom 93 is divided into a total of three members.

The upper flange 71 is fixed to the upper end portion of the body 91, and the cylindrical body 92 constituting the top 92 is formed.
A lower flange 72 is integrally formed at the lower end of b, and the upper mounting portion 7 is constituted by the pair of flanges 71, 72, and between the respective flanges 71, 72 constituting the mounting portion 7,
A freely attachable / detachable coupling body composed of the bolt 7a and the nut 7b is coupled at a plurality of positions on the circumference thereof so that the body 91 and the top 92 can be freely attached / detached. In addition, each flange 71, 72
At the abutting part of the
Intervene.

A lower flange 81 is attached to the lower end of the body 91.
And the outer peripheral portion of the bottom 93 is formed to have a large diameter to integrally provide the large diameter portion 82, and the flange 81 and the large diameter portion 82 form the lower mounting portion 8. Between the constituent flange 81 and the large-diameter portion 82, detachable joints made up of bolts 8a are joined at a plurality of positions on the circumference thereof, so that the body 91 and the bottom 93 can be freely attached and detached.
Similarly, at the abutting portion of the flange 81 and the large-diameter portion 81, a sealing means 83 composed of an O-ring is provided.

On the other hand, the outer peripheral wall 13 of the fixed scroll 1
To support the movable scroll 2 in a freely rotatable manner,
Further, the upper housing 5A is provided with a cylindrical wall portion 51 that covers the housing chamber 50 of the crankpin portion 30 and the outer peripheral portion of the motor 4, and the spigot portion 5 is provided below the upper housing 5A.
2a, which is fitted through 2a and has a side wall 52 that surrounds the lower space of the motor 4, and has an open bottom lower housing 5
B and the upper and lower housings 5A, 5
A housing 5 in which B is detachably coupled via a bolt 52b is formed.

Below the accommodation chamber 50 in the upper housing 5A, a pair of rolling bearings 31a, 31b for supporting the drive shaft 3 at the upper position of the motor 4 are provided.
And an upper bearing 31 composed of Further, a lower bearing 32, which is a metal bearing for supporting the drive shaft 3 at a lower position of the motor 4, is provided on a central boss portion 54 of the lower housing 5B, which is connected to the side wall portion 52 via a rib 53. To wear.

Further, on the upper outer peripheral portion of the upper housing 5A,
A flange-shaped support portion 55 that supports the upper flange 71 that constitutes the upper attachment portion 7 is provided on the inner peripheral side, and the upper housing 5A is placed on the upper attachment portion 7 via the support portion 55 and the bolt 56 The entire housing 5 is detachably attached to the upper attachment portion 7 by connecting the above.

Further, the fixed scroll 1 is detachably attached to the upper surface of the upper housing 5A via bolts 17. Further, a sealing means 18 composed of an O-ring is interposed between the outer peripheral wall 13 of the fixed scroll 1 and the cylindrical body 92b forming the top 92.

On the other hand, a lower fixing plate 57 for closing the bottom of the lower housing 5B is fixed below the inside of the body 91, and the fixing plate 57 and the lower housing 5B are detachably connected by a bolt 58. ..

Further, the suction pipe 6 for guiding the suction gas is detachably attached to the joint body 91a attached to the side portion of the body 91 by the bolt 6b through the flange portion 6a integrated with the base end portion thereof, and the motor is also attached. The side wall 52 of the lower housing 5B corresponding to the lower space of 4 is provided with a connection port 59 for receiving the end of the suction pipe 6 in a freely attachable / detachable manner, and around the connection part between the connection port 59 and the suction pipe 6. , A seal body 60 composed of an O-ring is interposed.

A filter 61 is installed in the opening of the suction pipe 6 so as to extend transversely in the lower housing 5B, and in the upper housing 5A, the upper space of the motor 4 is hermetically sealed. A communication port 62 for communicating with the inside of the is opened. Further, a displacement type oil supply pump device 34 is attached to the lower end of the drive shaft 3, and the oil pickup 3
Lubricating oil is pumped into the oil supply holes 36 and 37 provided in the drive shaft 3 via 5 to supply the respective sliding parts such as the upper and lower bearings 31 and 32 and the Oldham ring 33. Further, inside the top 92, a discharge chamber 94 for opening the discharge gas discharged from the discharge hole 16 is defined.
An oil separator 95 including an annular demister 95a and a holder 95b for separating oil from the discharge gas in the chamber 94.
And an oil discharge passage 96 using a capillary tube is opened in the discharge chamber 94, and its outlet is joined with the oil return port 50a of the storage chamber 50 to be coupled to the joint body 50b. The oil is returned to the oil sump 90 at the bottom by communicating with the pipe 50c.

Thus, by removing the connection at the upper mounting portion 7 and removing the top 92 from the body 91, maintenance of the oil separator 94 and the like located on the upper side of the fixed scroll 1 can be performed, and further, the top 92 is attached to the body. By removing the fixed scroll 1 from the housing 91 and the fixed scroll 1 from the housing 5, maintenance can be performed on the inner side of the compression chamber 15 which is to be defined between the scrolls 1 and 2, the rotating portion of the movable scroll 2, and the like. By removing 92 from the body 91 and removing the housing 5 from the upper mounting portion 7, it is possible to perform maintenance of the entire rotating portion of the housing 5 and the movable scroll 2 and the motor 4 supported thereby.

On the other hand, by removing the bottom 93 from the body 91 by releasing the connection at the lower mounting portion 8, the oil sump 90 at the bottom of the closed casing 9 and the oil supply pump device 34 can be maintained, and the body 91 can be removed. By removing the bottom 93 and removing the lower fixing plate 57 from the housing 5, it is possible to perform maintenance on the lower side of the motor 4, such as removing dust accumulated under the motor 4.

Moreover, as described above, the drive shaft 3 is supported on both sides via the upper bearing 31 and the lower bearing 32 while the maintenance of not only the upper side but also the lower side in the closed casing 9 can be easily performed. Since it is fixed to the body 91 via the housing 5 and the upper mounting portion 7 at the upper position and to the body 91 via the housing 5 and the lower fixing plate 57 at the lower position, respectively, the supporting rigidity of the drive shaft 3 is improved. Therefore, the drive shaft 3 can be stably held, and shaft runout of the drive shaft 3 can be suppressed.

Moreover, since the seal member 60 is provided around the contact portion between the suction pipe 6 and the connection port 59, the entire amount of the suction gas can be supplied to the lower space of the motor 4, and the lower portion of the motor 4 is moved upward. The entire amount of the intake gas can be circulated through the air gap between the rotor 41 and the stator 42 and the like, the motor cooling effect can be sufficiently exerted, and the intake gas and the oil accumulated in the oil sump 90 at the bottom can be sufficiently exerted. Can be prevented, and the amount of oil that flows out from the discharge pipe 97 to the outside can be reduced.

[0028]

As described above, according to the first aspect of the present invention, the body 91, the top 92 and the bottom 93 constituting the closed casing 9 are made detachable via the upper mounting portion 7 and the lower mounting portion 8, and A housing 5 supporting the movable scroll 2 and the motor 4 and supporting the drive shaft 3 on both sides is detachably attached to the upper mounting portion 7, while the fixed scroll 1 is detachably attached to the upper portion of the housing 5, and the housing is also attached. Since the bottom of 5 is closed and the lower fixing plate 57 for fixing to the lower part of the body 91 and the housing 5 can be freely attached and detached, not only the upper side in the closed casing 9 but also the lower side can be easily maintained. The drive shaft 3 can be stably supported, the shaft runout of the drive shaft 3 can be suppressed, and vibration and noise can be prevented.

According to the invention of claim 2, further,
By interposing the seal body 60 around the connection port of the suction pipe 6, the entire amount of the suction gas can be supplied to the motor 4 and the cooling effect can be sufficiently exerted, and at the same time, the suction gas and the oil accumulated at the bottom part Interference can be prevented and the amount of oil rise can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an upper side of a scroll compressor according to the present invention.

FIG. 2 is a sectional view of the lower side.

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

[Explanation of symbols]

 1 Fixed Scroll 2 Movable Scroll 3 Drive Shaft 4 Motor 5 Housing 6 Suction Pipe 7 Upper Mounting Part 8 Lower Mounting Part 9 Sealed Casing 31 Upper Bearing 32 Lower Bearing 57 Lower Fixing Plate 59 Connection Port 60 Sealing Body 91 Body 92 Top 93 Bottom

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F04C 29/00 S 8608-3H

Claims (1)

Claim: What is claimed is: 1. A scroll compressor in which a fixed scroll 1 and a movable scroll 2 are installed in an upper part of a hermetic casing 9, and a motor 4 for connecting a drive shaft 3 is installed in a lower part of the scroll compressor. The casing 9 has a body 91 and a top 9
2 and a bottom 93, and an upper mounting portion 7 and a lower mounting portion 8 for coupling a detachable coupling body between the body 91 and the top 92 and between the body 91 and the bottom 93, respectively. An upper bearing 31 and a lower bearing 32, which are provided, support the movable scroll 2 and the motor 4, and support both sides of the drive shaft 3 at the vertical position of the motor 4.
A bottom open type housing 5 is formed, and the housing 5 is detachably attached to the upper mounting portion 7, while the fixed scroll 1 is detachably attached to the upper portion of the housing 5, and the body 91 is A lower fixing plate 57 that closes the bottom of the housing 5 is fixed to the lower inside of the housing 5, and the fixing plate 57 and the housing 5 are connected via a detachable connecting body. Scroll type compressor. 2. A suction pipe 6 is detachably attached to a side portion of a body 91 in a closed casing 9, and an end portion of the suction pipe 6 is freely attached to and detached from a side wall portion of a housing 5 corresponding to a lower space of a motor 4. To open the connection port 59 to be received in the vicinity of the connection portion between the connection port 59 and the suction pipe 6,
The scroll compressor according to claim 1, wherein a seal body 60 is interposed.