JP2000303972A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately perform sealing by means of an annular sealing member interposed between the back surface of a turning scroll and a housing groove in a recessed shape in cross section formed over a main frame faced to the back surface. SOLUTION: This scroll compressor is so constituted that an electric motor chamber 2, a discharge chamber 3 and a compression part 4 are disposed in a closed container 1, a stationary scroll 5 having a spiral lap 5b erected over the inner surface of an end plate 5a, and a turning scroll 6 are mutually meshed with each other in the compression part so as to be formed into a compression chamber 7, a discharge hole 5c connecting the compression chamber with the discharge chamber is formed, and an annular sealing member 10 is interposed between the back surface of the turning scroll and the main frame 9 having a housing groove 8 faced to the back surface for the sealing member, formed up. In this case, a first inclined part 10a is provided for the inner circumferential surface of the sealing member, and a second inclined part 8a faced to the first inclined part is provided for the housing groove in such a way that the first inclined part is brought into contact with the second inclined part with pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor, and more specifically, to a scroll compressor, which is interposed between a back surface of a orbiting scroll and a receiving groove having a substantially concave cross section formed in a main frame opposed thereto. The present invention relates to a structure in which such a portion can be accurately sealed by an annular sealing member.

[0002]

2. Description of the Related Art A conventional scroll compressor is, for example, shown in FIG.
As shown in the figure, a motor chamber 2 and a discharge chamber 3
The fixed scroll 5 in which a spiral wrap 5b is erected on the inner surface of a head plate 5a, and the spiral wrap 6b is also erected on one surface of the end plate 6a. The orbiting scroll 6 meshes with each other to form a compression chamber 7,
Forming a discharge hole 5c connecting the compression chamber 7 and the discharge chamber 3;
An annular seal member 10 was interposed between the back surface of the orbiting scroll 6 and the main frame 9 in which the receiving groove 8 for the seal member was formed to face the orbiting scroll 6.

However, since the seal member 10 cannot be brought into close contact when the pressure difference between the outside and the inside is small, for example, immediately after the start of operation, there is a risk of poor sealing. In the case of a structure in which high-pressure gas is introduced to the outside of the member 10 and low-pressure gas is introduced to the inside, it is necessary to seal the inner peripheral surface of the seal member 10, but the seal gap expands due to the radial thermal expansion of the seal member 10. Therefore, there is a risk that the seal may be defective.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, in the present invention, the orbiting scroll is interposed between a back surface of the orbiting scroll and a receiving groove having a substantially concave cross section formed in a main frame opposed thereto. It is an object of the present invention to provide a scroll compressor in which the location can be accurately sealed by an annular seal member.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a motor room, a discharge chamber, and a compression section are arranged in a closed container, and a spiral wrap is provided on the inner surface of a head plate in the compression section. The fixed scroll and the orbiting scroll, which are provided upright, are meshed with each other to form a compression chamber, and a discharge hole connecting the compression chamber and the discharge chamber is formed.
In a scroll compressor in which an annular seal member is interposed between a main frame having a receiving groove for the seal member opposed thereto, a first inclined portion is provided on an inner peripheral surface of the seal member, A second inclined portion facing the first inclined portion is provided in the accommodation groove, and the first inclined portion and the second inclined portion are in pressure contact with each other.

Further, the seal member is made of an elastic member, and the first inclined portion of the seal member is formed so as to be pressed by the second inclined portion of the accommodation groove.

[0007] Further, a groove having a substantially U-shaped cross section with an open outside is provided on the outer peripheral portion of the seal member.

Further, the first inclined portion of the seal member is formed at an angle slightly larger than the second inclined portion of the accommodation groove.

Further, a biasing means for vertically biasing the vicinity of the open end of the groove is provided in the groove having a substantially U-shaped cross section.

Further, the biasing means is constituted by a compression coil spring.

Further, a plurality of the compression coil springs are provided in the groove at substantially equal intervals.

Further, the biasing means is constituted by a leaf spring having an open outer side and a substantially V-shaped cross section.

Further, a plurality of the leaf springs are provided in the groove at substantially equal intervals.

Further, the leaf spring is substantially annular or substantially C-shaped.
It has a configuration formed in a letter shape.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. FIG. 1 and FIG.
3 (A) and 3 (B), FIGS. 4 to 6,
As shown in FIGS. 7 (A) and 7 (B), 1 is a closed container, 2 is a motor room arranged in the closed container 1, 3 is a discharge chamber, 4 is a compression unit, and 4 is a compression unit. The fixed scroll 5 having a spiral wrap 5b erected on the inner surface of a head plate 5a and the orbiting scroll 6 having a spiral wrap 6b erected on one surface of the end plate 6a are meshed with each other. The compression chamber 7 is formed between the wraps 5b and 6b. 5c is a discharge hole connecting the compression chamber 7 and the discharge chamber 3. Reference numeral 10 denotes an annular seal member interposed between the back surface of the orbiting scroll 6 and a main frame 9 having a receiving groove 8 for the seal member opposed thereto.

A first inclined portion 10 is formed on the inner peripheral surface of the seal member 10.
a, the first inclined portion 10a is provided in the accommodation groove 8.
Are provided opposite to each other, and these first inclined portions 10a are provided.
And the second inclined portion 8a are pressed against each other, so that the seal member 10 has a pressure difference between the outside and the inside of the seal member 10 as in the above-described related art. Is small, the sealing member 10
In the case of a structure in which a high-pressure gas is introduced to the outside and a low-pressure gas is introduced to the inside, the first inclined portion 10a and the second inclined portion 8a can be accurately brought into pressure contact with each other so that there is no possibility of a poor seal. Structure.

The seal member 10 is made of an elastic member. As shown in FIGS. 3A and 3B, the first inclined portion 10a of the seal member 10 is
The seal member 10 is pressed by the second inclined portion 8a.
Is formed so as to be slightly smaller than the inner diameter A of the accommodation groove 8 so that the sealing member 10 can be accurately pressed against the accommodation groove 8 while elastically deforming the seal member 10. , And the structure is such that there is no possibility that sealing failure occurs.

Further, in the case of a structure in which the high-pressure gas a is introduced to the outside of the seal member 10 and the low-pressure gas b is introduced to the inside, the gaps c and d shown in FIG. On the other hand, as in the prior art described above, a radial gap between the first inclined portion 10a and the second inclined portion 8a causes a seal gap to be generated or expanded due to radial thermal expansion of the seal member 10. Since this is not the case, there is no risk of poor sealing.

FIG. 5 shows an outer peripheral portion of the seal member 10.
As shown in the figure, a groove portion 10b having a substantially U-shaped cross section with the outside opened.
Is provided, the elastic effect of the seal member 10 can be enhanced, and the first inclined portion 10a and the second inclined portion 8a can be pressed more effectively.

The first inclined portion 10a of the seal member 10
Is formed at an angle slightly larger than the second inclined portion 8a of the accommodation groove 8, so that θ2> θ1 as shown in FIG.
The first inclined portion 10a and the second inclined portion 8a can be effectively pressed against each other.

The groove 10b having a substantially U-shaped cross section is provided with an urging means described later for urging the vicinity of the open end of the groove 10b up and down. The structure is such that the one inclined portion 10a and the second inclined portion 8a can be pressed against each other accurately and more firmly.

The urging means for urging the vicinity of the open end of the groove 10b up and down is constituted by a compression coil 11 spring as shown in FIG. 7A as an example. As described above, the first inclined portion 10a and the second inclined portion 8a have a structure in which they can be accurately and firmly pressed against each other.

Further, the compression coil 11 spring is provided in the groove portion.
By providing a plurality of the first inclined portions 10a and the second inclined portions 8a in the circumferential direction, the plurality of the first inclined portions 10a and the second inclined portions 8a can be evenly and firmly pressed against each other along the circumferential direction. I have.

Further, as another example, as shown in FIG. 7B, an urging means for urging the vicinity of the open end of the groove 10b up and down is formed to have a substantially V-shaped cross section with the outside open. Leaf spring
12, so that the first inclined portion 10a and the second inclined portion 8a can be accurately and firmly pressed against each other as in the case of the above-described example. Structure.

Further, since a plurality of the leaf springs 12 are provided at substantially equal intervals in the groove 10b, the first inclined portion 10a and the second inclined portion 8a are provided in the same manner as in the above-described example. Can be pressed evenly and more firmly along the circumferential direction.

Further, since the leaf spring 12 is formed in a substantially annular or substantially C-shape, the first inclined portion 10a and the second inclined portion 8a can be more evenly distributed along the circumferential direction.
In addition, it is configured to be able to press more firmly.

With the above configuration, FIG. 1, FIG. 2, and FIG.
(A) and FIG. 3 (B), FIGS. 4 to 6, and FIG.
As shown in FIGS. 7A and 7B, a first inclined portion 10a is provided on the inner peripheral surface of the seal member 10, and a second groove facing the first inclined portion 10a is formed in the accommodation groove 8. Since the inclined portion 8a is provided, and the first inclined portion 10a and the second inclined portion 8a are brought into pressure contact with each other, the sealing member 10 is provided outside the sealing member 10 as in the conventional technique described above. Even when the pressure difference with the inside is small, the sealing member 10
In the case of a structure in which a high-pressure gas is introduced to the outside and a low-pressure gas is introduced to the inside, the first inclined portion 10a and the second inclined portion 8a can be accurately brought into pressure contact with each other so that there is no possibility of a poor seal. Scroll compressor.

[0028]

As described above, according to the present invention, the annular seal member interposed between the back surface of the orbiting scroll and the housing groove having a substantially concave cross section formed in the main frame facing the orbiting scroll is provided. Thus, the scroll compressor can seal the portion accurately.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a seal member.

FIG. 3 is an explanatory view of a main part showing an assembled state of a seal member,
(A) shows a state during installation, and (B) shows a state after installation.

FIG. 4 is an explanatory view of a main part showing a state in which a high-pressure gas is guided outside a sealing member and a low-pressure gas is guided inside;

FIG. 5 is an essential part explanatory view showing a state where a groove having a substantially U-shaped cross section is provided in the seal member.

FIG. 6 is an essential part explanatory view showing an inclined portion formed in a groove portion and an inclined portion formed in a sealing member.

FIG. 7 is an explanatory view of a main part showing an urging means provided in a groove portion, where (A) shows an example of a compression coil spring,
(B) shows another example of a leaf spring.

FIG. 8 is a sectional view of a scroll compressor according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Motor room 3 Discharge chamber 4 Compression part 5 Fixed scroll 5a End plate 5b Lap 5c Discharge hole 6 Orbiting scroll 6a End plate 6b Lap 7 Compression chamber 8 Housing groove 8a Second inclined part 9 Main frame 10 Seal member 10a First inclined Part 10b Groove θ1 Inclination angle of groove θ2 Inclination angle of seal member

Claims (10)

[Claims] 1. A fixed scroll and an orbiting scroll in which an electric motor chamber, a discharge chamber, and a compression section are arranged in a closed container, and a spiral wrap is provided upright on the inner surface of a head plate in the compression section. Forming a compression chamber, forming a discharge hole connecting the compression chamber and the discharge chamber, and forming an annular space between the back surface of the orbiting scroll and the main frame having a receiving groove for a seal member opposed thereto. In a scroll compressor having a seal member interposed therebetween, a first inclined portion is provided on an inner peripheral surface of the seal member, while a second inclined portion facing the first inclined portion is provided in the housing groove, A scroll compressor wherein the first inclined portion and the second inclined portion are pressed against each other. 2. The sealing member according to claim 1, wherein the sealing member is made of an elastic member, and the first inclined portion of the sealing member is formed so as to be pressed by the second inclined portion of the accommodation groove. Item 2. A scroll compressor according to Item 1. 3. The scroll compressor according to claim 1, wherein a groove having a substantially U-shaped cross section with an open outside is provided on an outer peripheral portion of the seal member. 4. The sealing member according to claim 1, wherein the first inclined portion is formed at an angle slightly larger than the second inclined portion of the housing groove.
2. The scroll compressor according to item 1. 5. The scroll compressor according to claim 3, wherein said groove portion having a substantially U-shaped cross section is provided with a biasing means for vertically biasing the vicinity of an open end of said groove portion. 6. The scroll compressor according to claim 5, wherein said urging means comprises a compression coil spring. 7. The scroll compressor according to claim 5, wherein a plurality of the compression coil springs are provided in the groove at substantially equal intervals. 8. The scroll compressor according to claim 5, wherein said urging means comprises a leaf spring having an outer side opened to form a substantially V-shaped cross section. 9. The scroll compressor according to claim 5, wherein a plurality of the leaf springs are provided in the groove at substantially equal intervals. 10. The scroll compressor according to claim 5, wherein the leaf spring is formed in a substantially annular shape or a substantially C shape.