JPH03124983A - Scroll compressor - Google Patents

Abstract

PURPOSE:To prevent the refrigerant compressed in a compression space from leaking to the low pressure side by forming chip seal materials with a resin material and reinforcing fibers, and providing the reinforcing fibers along the scroll direction of chips. CONSTITUTION:Reinforcing fibers such as ceramic fibers or carbon fibers are impregnated in a resin material such as polyimede or polymamide imede to form chip seals 24 and 25. Chip seals 24 and 25 are coupled with grooves 22 and 23 of laps 11 and 14, and they are prevented from being shrunk when affected by the high-pressure refrigerant in a compression space 16 not to impair the sealing property with mating end plates 9 and 13. Chip seal materials 24 and 25 formed with a circular cross section are coupled and fitted to grooves 22 and 23 formed with a square cross section, thus gaps are invariably formed between grooves 22 and 23 and chip seal materials 24 and 25 on the groove bottom, and chip seal materials 24 and 25 are pressed to end plates 9 and 13 by the high-pressure refrigerant. The sealing property between a fixed scroll 7 and a swaying scroll 8 can be improved.

Description

Detailed Description of the Invention (a) Industrial Application Field This invention relates to a scroll compressor equipped with a sealing material to prevent refrigerant compressed in a compression space formed by a fixed scroll and an oscillating scroll from leaking. .

(Explanation) Conventional technology The conventional scroll compressor is an example of Japanese Patent Application Laid-Open No. 61-1671.
The structure is as shown in Japanese Patent No. 85. Here, a conventional example will be explained with reference to this publication. In FIGS. 5 and 6, 5o is a scroll compressor, and this scroll compressor includes a cylindrical container 51 and a rotating shaft 53 coaxially supported within the container by a frame 52.
and a rotor 54 attached to the middle part of this rotating shaft,
A stator 56 that is fixed in the container 51 to surround the rotor 54 and forms an electric motor section 55 together with the rotor to drive the rotating shaft 53; and a head 57 formed at one end of the rotating shaft 53. -A') An oscillating scroll 59 that is fitted eccentrically to the container 51 and connected to the bottom 52 via a leg joint 58; A fixed scroll 62 that forms a plurality of compression spaces 6o in contact with each other and has a discharge hole 61 in the center, a suction pipe 63 that is provided on the side of the container 51 and supplies refrigerant to the compression space 60, and a container 51. 51, and a discharge pipe 64 for discharging the refrigerant discharged to the outside via a compressed discharge hole 61 in a compression space 60 provided at the center of the ceiling.

The oscillating scroll 59 is formed of a disc-shaped end plate 65 and a spiral wrap 66 that is integrally provided upright on the upper surface of the end plate and has an inbonito shape or a curve similar to this. The fixed scroll 62 is formed of a disc-shaped end plate 67 and a spiral wrap 68 which is integrally provided upright on the lower surface of the end plate and has an inbonito shape or a curve similar to this. . Both laps 66.6
A single groove 69, 70 with both ends open is provided on the distal end surface of 8. Chip sealing materials 71 and 72 made of a stretchable elastic member such as JFi are fitted into this groove up to the middle of the groove 69 and 70. One end of a through hole 75.76 provided in the wrap 66.degree. 68 is opened in the hollow portion 73.74 into which the chip sealing material 71.72 is not fitted. The other end of this through hole opens to the side surface of the wrap 66, 68 which is on the higher pressure side.

In the scroll compressor of this structure, the refrigerant compressed in the compression space 60 is supplied to the hollow part 73.74 from the through holes 75.76 provided on the side surfaces of the wraps 66.
The chip sealing materials 71 and 72 fitted inside the end plate 65
．． 67 to prevent the refrigerant compressed in the compression space 60 from leaking.

(c) Problems to be Solved by the Invention However, the depth sealing material 71 and 72 made of resin are fitted to the middle of the grooves 69 and 70, and the hollow portion 7 is inserted into this groove.
3.74, so if it contracts due to pressure, it will go 1 meter deep into the groove 69.70 and the hollow part 73.74 will no longer be formed, causing the compressed refrigerant to close to the end plate 65.67. There were problems such as not being able to press it.

The invention solved the above problem by preventing the resin chip sealing material fitted into the groove from contracting due to pressure, and preventing the high-pressure refrigerant in the compression space formed by the fixed Shumir and the oscillating scroll. The object of the present invention is to provide a scroll compressor that can prevent the leakage of gas to the low pressure side.

(d) Means for Solving the Problems This invention provides a fixed scroll having an end plate and a spiral wrap, an oscillating scroll having an end plate and a spiral wrap that face and engage with the fixed scroll;
In the scroll compressor, the chip sealing material is housed in a groove provided on the tip end surface of the wrap of both scrolls facing each end plate, and the chip sealing material is made of a resin material and a material contained in the resin material. The reinforcing fibers are arranged along the spiral direction of the wrap.

(E) Function With the above-described structure, the present invention forms a chip sealing material with a resin material and reinforcing m-fibers, and the reinforcing fibers are provided along the spiral direction of the wrap, so that the pressure of the chip sealing material is This improves the shrinkage strength of the compressor, prevents the sealing performance of the chip sealing material in contact with the end plate from being impaired, and prevents the high-pressure refrigerant in the compression space from leaking to the low-pressure 11 and reducing the refrigerating capacity.

(f) Examples The present invention will be explained below based on the examples shown in FIGS. 1 to 3.

Reference numeral 1 denotes a closed container, in which a scroll compression element 2 is housed on the upper side, and an electric element 3 for driving the compression element is housed on the lower side. Reference numeral 4 denotes a frame, and this frame is provided with a bearing portion 6 for pivotally supporting the rotating shaft 5 at the center thereof.

The scroll/EWr element is composed of a fixed scroll 7 and an oscillating scroll 8. The fixed scroll 7 has a disk-shaped end plate 9, an annular wall 10 protruding from the periphery of one side of the end plate, and an involute-shaped or curved line approximating the involute-shaped end plate 9 that is erected and surrounded by the annular wall. It is composed of a spiral wrap 11 consisting of. A discharge hole 12 is provided in the center of the end plate 9 of the fixed scroll 7.

The fixed scroll 7 has an annular wall 10 and a wrap 11.
This annular wall is fixed to the periphery of the frame with its protruding direction facing downward. The oscillating scroll 8 includes an end plate 13, a spiral wrap 14 formed of an involute shape or a curved line approximating the involute shape, which is erected on one side of the end plate, and is provided protruding from the center of the other side of the end plate 13. pin part 15
It is made up of. The oscillating scroll 8 is configured such that the projecting direction of the wrap 14 is directed upward, and the wrap faces and engages with the wrap 11 of the fixed scroll 7 to form a plurality of compression spaces 16 inside. 1
7 is provided eccentrically from the axis of the rotating shaft 5. Reference numeral 18 denotes an Oldham joint that allows the oscillating scroll 8 to revolve on a circular orbit relative to the fixed scroll 7 without rotating. A suction passage 19 is formed on the outer periphery of the frame 4 to introduce the refrigerant to the scroll compression element 2 . 20 is a suction pipe, and this suction pipe opens into the closed container 1 below the electric element 3. 21 is a discharge pipe attached to the earthen wall of the closed container 1;
This discharge pipe is provided in communication with the discharge hole 12.

Fixed scroll 7 and swinging sufu [wrap 11 with call 8
．． 14 has a single groove 22 and 23 on both sides.
are provided along the spiral direction. This groove is formed to have a square cross section. Reference numeral 24.25 denotes a chip sealing material having a circular cross section fitted into the groove 22.23. and reinforcing fibers 27 such as carbon fibers. The reinforcing fibers are also impregnated into the $61 fat material 26 along the spiral direction of the wrap 11.14. The reinforcing fibers 27 account for 40 to 60% by weight of the total weight of the chip sealing material 24.25.

In the scroll compressor configured in this manner, when the electric element 3 is rotated, its rotational force is transmitted to the swinging scroll 8 via the rotating shaft 5.

That is, the swinging scroll has a bin portion 15 inserted into the boss hole 17 of the rotating shaft 5 eccentrically with respect to the axis of the rotating shaft.
The fixed scroll 7 is driven by an Oldham coupling 18 and is caused to revolve on a circular orbit so as not to rotate relative to the fixed scroll 7. The fixed scroll 7 and the oscillating scroll 8 gradually reduce the compression space 16 formed by these scrolls from the outside to the inside, and flow into the closed container 1 from the suction pipe 20 and the mechanical power element 3 The refrigerant flowing through the suction passage 19 on the outer periphery of the frame 4 is guided into the compression space 16 and compressed. This compressed refrigerant is prevented from leaking from the compression space 16 on the high pressure side to the compression space 16 on the low pressure side by a chip sealing material 24.25 fitted in a groove 22.23 provided on the front end surface of the wrap 11.14. ing. Then, this compressed refrigerant is discharged from the discharge hole 1 of the end plate 9 of the fixed scroll 7.
2 to the outside of the closed container 1 via the discharge pipe 21.

The chip sealing material 24.25 is formed by containing reinforcing fibers 27 such as ceramic fibers or carbon fibers in a resin material 26 such as polyimide or polyamideimide, so that the chip sealing material 24.25 is formed in the groove 22.23 of the wrap 11.14. They are fitted together to prevent contraction even under the influence of the high-pressure refrigerant within the compression space 16. Therefore, the chip sealing material 24.25 is attached to the end plate 9 facing the wrap 11.14.
The sealing performance with ゜13 is not impaired. In addition, the chip sealing material 24.25 is formed into a circular cross section.
By fitting and installing the chip into the grooves 22 and 23 formed with a square cross section, a gap is always formed between the grooves 22 and 23 and the chip sealing materials 24 and 25 at the bottom of the grooves.
It is arranged so that it comes into pressure contact with the end plate 9.13 using high-pressure refrigerant. Moreover, since the chip sealing materials 24 and 25 are made of the resin material 26, even if they are pressed against the end plates 9 and 13, they can be prevented from wearing out the end plates. In addition, the wear of the chip sealing material 24 and 25 itself is caused by the reinforcing fibers 27
is prevented.

In this invention, the chip sealing material 24.25 fitted in the groove 22.23 of the wrap 11.14 is made of a composite material of a resin material 26 and reinforcing fibers 27, so that the fixed scroll 7 and the oscillating scroll 8 can be separated. It is designed to improve the sealing performance of the

(G) Effects of the Invention As described above, according to the present invention, the chip sealing material fitted into the groove provided on the tip end surface of the wrap is made of a composite material of a resin material and reinforcing fibers. The chip sealing material can be prevented from contracting under the influence of the high-pressure refrigerant, and can also prevent the refrigerant compressed in the compression space formed by the fixed scroll and the oscillating scroll from leaking to the low-pressure side. be.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a scroll compressor showing an embodiment of the present invention, FIG. 2 is a plan view of an oscillating scroll, and FIG.
Figure 4 is an enlarged sectional view of the main part of the wrap, Figure 4 is an enlarged sectional view of the chip seal material, Figure 5 is a sectional view of a conventional scroll compressor, and Figure 6 is the main part of the wrap. FIG. 7... Fixed scroll, 8... Swinging scroll, 9
．． 13... End plate, 2.23... Groove, 26... Resin material, 11.14... Wrap, 2 24.25... Chip sealing material, 27... Reinforced fiber.

Claims (1)

[Scope of Claims] 1. A fixed scroll having an end plate and a spiral wrap, an oscillating scroll having an end plate and a spiral wrap that face and engage with the fixed scroll, and tip surfaces of the wraps of both scrolls. and a chip sealing material housed in a groove provided opposite to each end plate, the chip sealing material being formed of a resin material and reinforcing fibers contained in the resin material. death,
A scroll compressor characterized in that the reinforcing fibers are provided along the spiral direction of the wrap. 2. The scroll compressor according to claim 1, wherein the chip sealing material has a circular cross section.