JP3244313B2 - Seal device for scroll compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a scroll compressor.

[0002]

2. Description of the Related Art A conventional scroll compressor is configured as shown in, for example, Japanese Patent Publication No. 4-27399. Here, a conventional example will be described with reference to this publication. 6 and 7, reference numeral 50 denotes a scroll compressor. The scroll compressor includes a hermetically sealed container 51, a rotating shaft 53 supported coaxially with the hermetically sealed container 51 by a frame 52 in the container, and a rotating shaft 53. And a stator 56 fixed in the closed vessel 51 so as to surround the rotor 54 and forming a motor 55 with the rotor to drive the rotary shaft 53; A revolving scroll 59 eccentrically fitted to a head 57 formed at the upper end of 53 and connected to the frame 52 via an Oldham coupling 58, and fitted to the revolving scroll 59 fixed to the ceiling of the sealed container 51. A plurality of compression spaces 60 are formed in sliding contact with each other, and a fixed scroll 62 having a discharge hole 61 at the center and a fluid provided in a side A suction pipe 63 for supplying, sealed container 51
And a discharge pipe 64 which is compressed in a compression space 60 provided at the center of the ceiling portion and discharged to the outside via a discharge hole 61.

[0003] The orbiting scroll 59 is formed of a head plate 65 and a spiral wrap 66 which is provided integrally on the head plate. Further, the fixed scroll 62 is formed of a head plate 67 and a spiral wrap 68 provided integrally on the lower surface of the head plate. Both laps 6
A single groove 69, 70 covering both ends is provided at the front end surface of the 6, 68.
Are provided along the spirals of the wraps 66 and 68.

[0004] Reference numerals 71 and 72 denote chip sealing materials which are fitted into the grooves 69 and 70. The chip sealing material is formed by overlapping a plurality of identical leaf springs and is formed in a spiral shape in the same shape as the grooves 69 and 70. ing.

In the sealing device of the scroll compressor having this structure, the tip sealing material 7 fitted in the grooves 69 and 70 is used.
1 and 72 are made of a head 65,
The fluid compressed in the compression space 60 is prevented from leaking to the low pressure side by pressing the compressed space 67.

[0006]

However, in the conventional chip seal members 71 and 72, a plurality of the same leaf springs are overlapped and fitted into the grooves 69 and 70. There was a problem that the gap at one location between them became large, and the fluid easily leaked from the high pressure side to the low pressure side.

Further, since the conventional chip seal members 71 and 72 are fitted in the grooves 69 and 70 having the same shape, high-pressure fluid does not easily enter between the bottoms of the grooves and the chip seal material. There was a problem in that the force pressing against 65, 67 became weak.

The present invention solves the above problems,
While narrowing the gap between the groove and the tip seal material,
An object of the present invention is to provide a sealing device for a scroll compressor in which the force for pressing the tip sealing material against a head plate is increased.

[0009]

According to the present invention, a first scroll and a second scroll, in which a spiral wrap is erected on a head plate, are combined with each other to form a plurality of spaces between each wrap and the head plate. In a scroll compressor in which the first and second scrolls are relatively revolved and the space is gradually reduced from the outside to the inside, a groove is provided on a tip end surface of the wrap of the scroll. A chip sealing material in which a plurality of leaf springs are overlapped in the lateral direction is stored, and at least one leaf spring of the tip sealing material has a shape different from a spiral shape of another leaf spring.

Further, according to the present invention, a groove is provided on the tip end surface of the scroll wrap, and a tip seal material is stored in the groove.
The end face on the center side of the tip sealing material is chamfered.

[0011]

According to the present invention having the above-described structure,
By changing the shape of at least one of the plurality of leaf springs to the shape of another leaf spring, dispersing the gaps between each of the plurality of leaf springs, and narrowing the gap between the gaps to make it difficult for fluid to leak. It is.

Further, in the present invention, the end face of the chip sealing material is chamfered so that a fluid can easily enter between the chip sealing material and the bottom of the groove, and the force for pressing against the end plate is increased.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a sectional view of a scroll compressor according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a main part in which a scroll wrap according to the present invention is combined. FIG. 3 is a plan view of the tip sealing material fitted into the groove of the wrap according to the present invention. FIG. 4 is an enlarged plan view of a main part of the chip sealing material of the present invention. FIG. 5 is an enlarged sectional view of a main part showing a state in which the chip sealing material of the present invention is fitted in the groove.

Reference numeral 1 denotes an airtight container, in which a scroll compression element 2 is accommodated on the upper side and an electric element 3 is accommodated on the lower side. Reference numeral 4 denotes a frame, on which a bearing 6 for supporting the rotary shaft 5 is provided at the center.

The scroll compression element 2 is a fixed scroll 7
And the orbiting scroll 8. The fixed scroll 7 has a disk-shaped end plate 9, an annular wall 10 protruding from one peripheral edge of the end plate, and a wrap 11 composed of an involute-shaped curve erected on the end plate 9 surrounded by the annular wall.
It is composed of The orbiting scroll 8 is composed of a disk-shaped end plate 12, a wrap 13 erected on one surface of the end plate and formed of an involute curve, and a pin portion 14 protruding from the center of the other surface of the end plate 12. It is configured.

The fixed scroll 7 is fixed to the peripheral edge of the frame 4 with the projecting directions of the annular wall 10 and the wrap 11 facing downward. Also, the orbiting scroll 8
With the wrap 13 projecting upward, the wrap is combined with the wrap 11 of the fixed scroll 7 to form a plurality of compression spaces 15 therein.

The end plate 9 of the fixed scroll 7 is provided at the center thereof with a discharge hole 16 for discharging the fluid compressed in the compression space 15.

Reference numeral 17 denotes a boss hole provided at the tip of the rotary shaft 5 for inserting the pin portion 14 of the orbiting scroll 8, and this boss hole is provided with its center eccentric with the axis of the rotary shaft 5.

Reference numeral 18 denotes an Oldham coupling that revolves on a circular orbit so that the orbiting scroll 8 does not rotate with respect to the fixed scroll 7.

A suction passage 19 for guiding a fluid to the scroll compression element 2 is formed on the outer periphery of the frame 4. Reference numeral 20 denotes a suction pipe, which is a closed vessel 1 below the electric element 3.
Open inside. Reference numeral 21 denotes a discharge pipe attached to the upper wall of the closed container 1, and this discharge pipe is provided in communication with the discharge hole 16.

On the tip end surfaces of the wraps 11 and 13 of the fixed scroll 7 and the orbiting scroll 8, a single groove 22, 23 whose both ends are closed is provided along the spiral direction.

Numerals 24 and 25 denote chip seals fitted in the grooves 22 and 23. The chip seals are formed by overlapping a plurality of leaf springs 26. At least one leaf spring 27 sandwiched between the leaf springs is formed in a shape different from that of the other leaf springs 26. In addition, chamfering 28 is provided on the end surfaces on the center side of the tip seal materials 24 and 25.
Is formed to form a concave portion 29 between the groove 22 and the bottom of the groove 23.

When the electric element 3 is rotated in the sealing device for a scroll compressor having such a configuration, the rotational force is transmitted to the orbiting scroll 8 via the rotating shaft 5. That is, the orbiting scroll 8 is driven by the pin portion 14 inserted into the boss hole 17 eccentric with respect to the axis of the rotating shaft 5, and revolves on a circular orbit so that the Oldham joint 18 does not rotate with respect to the fixed scroll 7. Let me do.

The fixed scroll 7 and the orbiting scroll 8 are combined with a compression space 15 formed by these scrolls.
Is gradually reduced from the outside to the inside, and the suction pipe 20 is
From the suction passage 19 on the outer periphery of the frame 4 through the electric element 3 and into the compression space 15. The compressed fluid is supplied from the discharge hole 16 of the fixed scroll 7 through the discharge pipe 21 to the closed container 1.
It is discharged outside.

The tip sealing members 24 and 25 are formed by laminating a plurality of identical leaf springs 26 and leaf springs 27 of different shapes sandwiched between the leaf springs 26 to form a plurality of leaf springs 26 and 27. Are formed so that a gap is formed between each of them. That is, the tip sealing materials 24 and 25
The gap between the leaf spring 26 and the side walls of the grooves 22 and 23 is overlapped by the leaf springs 27 having different shapes so as to press the other leaf springs 26 on both sides and fitted into the grooves 22 and 23. Can be narrowed. Therefore, the gaps formed between the tip seal materials 24 and 25 and the grooves 22 and 23 are dispersed and narrowed, and are further sealed by the oil attached to the respective surfaces, and the compression space from the high pressure side to the low pressure side is reduced. 15 makes it difficult for the fluid to leak.

Further, the chip seal materials 24 and 25 are formed with chamfers 28 formed on the end surfaces on the center side to form recesses 29 between the bottoms of the grooves 22 and 23 so that the fluid compressed in the compression space 15 can be removed. From the concave portion 29, the chip sealing materials 24, 25
And between the bottoms of the grooves 22 and 23 so as to be pressed against the end plates 9 and 12. For this reason,
The chip sealing members 24 and 25 can eliminate the need for elastic means for forcibly pressing the end plates 9 and 12.

[0028]

As described above, according to the present invention, the first scroll and the second scroll, in which the spiral wrap is erected on the end plate, are combined with each other to form a plurality of spaces between each wrap and the end plate. In the scroll compressor, wherein the first and second scrolls are relatively revolved and the space is gradually reduced from the outside to the inside, a groove is provided on a tip end surface of the wrap of the scroll. The tip seal material with multiple leaf springs stacked in the groove is stored,
Since at least one leaf spring of the tip sealing material has a shape different from the spiral shape of the other leaf springs, the gap between the tip sealing material and the groove can be dispersed, and the interval between the gaps can be reduced. Fluid can be prevented from leaking due to oil adhering.

Further, according to the present invention, a groove is provided on the tip end surface of the scroll wrap, and a tip seal material is stored in the groove.
Since the end face on the center side of the tip seal material is chamfered, high-pressure fluid can easily enter between the tip seal material and the bottom of the groove, and the tip seal material can be reliably pressed against the end plate.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part obtained by combining a scroll wrap according to the present invention.

FIG. 3 is a plan view of a tip sealing material fitted into a groove of a wrap according to the present invention.

FIG. 4 is an enlarged plan view of a main part of the chip seal material of the present invention.

FIG. 5 is an enlarged sectional view of a main part showing a state in which the chip seal material of the present invention is fitted in a groove.

FIG. 6 is a sectional view of a conventional scroll compressor.

FIG. 7 is a plan view of a conventional chip sealing material.

[Explanation of symbols]

 7 Fixed Scroll 8 Orbiting Scroll 9,12 End Plate 11,13 Lapping 15 Compression Space 22,23 Groove 24,25 Tip Seal Material 26,27 Leaf Spring 28 Chamfer 29 Concave

Continued on the front page (72) Inventor Katsuyoshi Tsuchiya 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuya Sato 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric (56) References JP-A-4-255588 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04C 18/02 311

Claims (2)

(57) [Claims] 1. A first scroll and a second scroll, in which a spiral wrap is erected on a head plate, are combined with each other to form a plurality of spaces between each wrap and the head plate, and the first and second scrolls are formed. In the scroll compressor in which the scroll is relatively revolved and the space is gradually reduced from the outside to the inside, a groove is provided in a tip surface of the wrap of the scroll, and a leaf spring is provided in the groove. A tip seal material in which a plurality of the leaf springs are overlapped in the horizontal direction, and the tip seal material has at least one leaf spring formed in a shape different from the spiral shape of the other leaf springs. Compressor sealing device. 2. The scroll wrap has a groove on the tip surface.
The chip seal material is stored in this groove.
Make sure that the tip sealing material is chamfered
The seal device for a scroll compressor according to claim 1, wherein
Place.