JP3205457B2 - Scroll type fluid machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type fluid machine suitable for use in, for example, an air compressor or a vacuum pump.

[0002]

2. Description of the Related Art A scroll type air compressor will be described as an example of a conventional scroll type fluid machine with reference to FIGS.

In the drawing, reference numeral 1 denotes a fixed scroll,
The fixed scroll 1 is fixed to the open end side of the casing so as to cover the open end side of a casing (not shown) formed in a substantially cylindrical shape with a bottom. The fixed scroll 1 has a disk-shaped end plate 2 disposed so that the center thereof coincides with an axis O1-O1 of a drive shaft 13 described later.
A spiral wrap portion 3 erected on the tooth bottom surface 2A of the end plate 2; and a cylindrical support portion 4 located on the outer peripheral side of the end plate 2 and surrounding the wrap portion 3. Approximately.

[0004] In addition, the tip surface 3A of the wrap portion 3 has
A U-shaped concave groove 5 is formed in the orbiting scroll 7 and opens toward the tooth bottom surface 8A of the end plate 8 of the orbiting scroll 7 described later.
Extends spirally along the longitudinal direction of the wrap portion 3. Further, a seal member 6 described later is mounted in the concave groove 5.

[0005] Reference numeral 6 denotes a sealing member mounted in the concave groove 5 of the wrap portion 3. The sealing member 6 is made of an elastic resin material having abrasion resistance and self-lubricating properties, for example, polytetrafluoroethylene (PTFE) or the like. It is formed in a rectangular cross section by a fluororesin, and spirally extends along the length direction of the concave groove 5. The sealing member 6 has a sealing surface 6A on a surface which is in sliding contact with the tooth bottom surface 8A of the end plate of the orbiting scroll 7. The seal member 6 is mounted in the groove 5 in a loosely fitted state, so that the seal member 6 can move upward, downward, left, right, and the like in the groove 5.

During the compression operation, when compressed air in a compression chamber 15 to be described later enters the concave groove 5 from a direction indicated by an arrow A in FIG.
Surface 8A of the end plate 8 of the
Slidably contacts the tooth bottom surface 8A and hermetically seals the gap between the tooth bottom surface 8A and the wrap portion 3.

Reference numeral 7 denotes an orbiting scroll provided in the casing to face the fixed scroll 1 so as to be orbitable. The orbiting scroll 7 has a disk-shaped end plate 8 having a tooth surface 8A on the surface side, A spiral wrap portion 9 erected from the tooth bottom surface 8A of the end plate 8 toward the end plate 2 of the fixed scroll 1 and formed in the same manner as the wrap portion 3 of the fixed scroll 1; Boss part 10 provided
The boss 10 is provided with a drive shaft 13 to be described later.
Is rotatably attached to the crank 13A.

[0008] In addition, on the tooth tip surface 9A of the wrap portion 9,
Similar to the wrap portion 3 of the fixed scroll 1, the concave groove 1 having a U-shaped cross section extending spirally along the longitudinal direction of the wrap portion 9.
1 is provided. The seal member 12 having the same seal surface 12A as the seal member 6 described above is mounted in the groove 11 in a loosely fitted state.

During the compression operation, the compression chamber 15
When the compressed air in the inside enters the concave groove 11, the sealing member 12 floats toward the tooth bottom surface 2A of the end plate 2 of the fixed scroll 1, and the sealing surface 12A slides on the tooth bottom surface 2A and wraps with the tooth bottom surface 2A. The airtight seal is provided between the first and second parts.

Reference numeral 13 denotes a drive shaft rotatably provided on the casing. The drive shaft 13 is a crank 13A having a distal end extending into the casing. The crank 13A has an axis O2-O2 whose axis O1-O of the drive shaft 13. It is eccentric by a predetermined dimension δ with respect to O1. The crank 13A of the drive shaft 13 supports the boss portion 10 of the orbiting scroll 7 so as to be able to orbit via a orbiting bearing 14, and makes the orbiting scroll 7 orbit via a rotation preventing mechanism (not shown). Is to give.

Here, the fixed scroll 1 and the orbiting scroll 7 are arranged such that the axis O2-O2 is eccentric with respect to the axis O1-O1 by the dimension δ, and the wrap portion 9 of the orbiting scroll 7 is wrapped around the fixed scroll 1. It is disposed so as to be superimposed on the portion 3 while being shifted by a predetermined angle in the circumferential direction.
Thereby, when the orbiting scroll 7 is turned with respect to the fixed scroll 1, the plurality of crescent-shaped compression chambers 15, 1 whose volume is continuously reduced between the wrap portions 3, 9 is formed.
5, ... are defined.

Reference numerals 16 and 17 denote a suction port and a discharge port formed in the fixed scroll 1. The suction port 16 is formed on the outer peripheral side of the end plate 2 so as to communicate with the outermost compression chamber 15, and discharges. The port 17 is formed in the center of the end plate 2 so as to communicate with the innermost compression chamber 15.

The scroll-type air compressor according to the prior art has the above-mentioned configuration, and its operation will be described below.

First, when the drive shaft 13 is driven to rotate by a drive source (not shown) such as a motor from outside the casing, this rotation is transmitted from the crank 13A of the drive shaft 13 to the orbiting scroll 7 via the orbit bearing 14. The orbiting scroll 7 makes a revolving motion with a revolving radius of dimension δ about the axis O1 -O1 of the drive shaft 13.

The compression chambers 15, 15,... Defined between the wrap portions 3, 9 by this swirling motion are continuously reduced toward the center side, and the air sucked from the suction port 16 is sequentially reduced. The compressed air is discharged from the discharge port 17 while being compressed.
From the air tank to an external air tank (not shown).

During the compression operation, the compressed air in the compression chamber 15 on the high pressure side enters the concave grooves 5 and 11,
The pressure of the compressed air presses the seal members 6, 12 toward the tooth bottom surfaces 8A, 2A of the end plates 8, 2 facing each other. As a result, the sealing members 6 and 12 float toward the tooth bottom surfaces 8A and 2A, and the sealing surfaces 6A and 12A are in sliding contact with the tooth bottom surfaces 8A and 2A, and the compression chambers defined between the wrap portions 3 and 9 are formed. 15 is hermetically sealed.

[0017]

In the prior art described above, the seal members 6, 12 mounted in the concave grooves 5, 11 of the wrap portions 3, 9 are compressed by the pressure of the compressed air from each compression chamber 15. The sealing action is merely obtained by floating and sliding the tooth surfaces 8A and 2A of the other party. For this reason, the sealing members 6 and 12 do not float sufficiently in some places, and the sealing surfaces 6A and 12A may not surely slide on the mating tooth bottom surfaces 8A and 2A, and there is a problem that the sealing performance cannot be improved.

In particular, when the pressure in each compression chamber 15 is not sufficiently increased, for example, immediately after the start of the compression operation, the seal members 6, 12 are surely directed toward the other tooth bottom surfaces 8A, 2A. There is a problem that it does not float and the sealing effect is not exhibited.

In a state where the seal members 6 and 12 are floated toward the bottom surface of the other tooth, as shown in FIG. 11, there is a gap between the bottom surfaces of the concave grooves 5 and 11 and the seal members 6 and 12. S is formed, and the gap S is communicated in the circumferential direction from the inner peripheral side to the outer peripheral side of the wrap portion in the concave grooves 5 and 11. As a result, there is a problem that the compressed air in the compression chamber 15 on the high pressure side flows through the gap S toward the compression chamber 15 on the low pressure side, leaks to the outside, and the compression efficiency is reduced.

Therefore, in a scroll compressor (hereinafter referred to as another prior art) described in Japanese Utility Model Laid-Open No. 2-148787 and Japanese Patent Laid-Open No. 3-11101, a plurality of thin lip-shaped projections are integrally formed on a seal member. Then, each of the lip-shaped projections is elastically deformed by the pressure of compressed air, and the leading end side is slidably contacted with the bottom surface of the concave groove or the like, so as to communicate in a circumferential direction between the bottom surface of the concave groove and the seal member. The formed gap is shut off to prevent the compressed air in the high-pressure side compression chamber from flowing through the gap toward the low-pressure side compression chamber to prevent leakage to the outside.

However, in such another conventional technique, each lip-shaped projection is elastically deformed by the pressure of the compressed air from the compression chamber to obtain a sealing effect. If the pressure in 15 is not sufficiently increased, there is a problem that the protrusion on each lip is not deformed and the sealing effect is not exhibited.

Further, another conventional sealing member includes:
Each lip-shaped projection receives compressed air and is elastically deformed every time the compression operation is performed, so that each lip-shaped projection may be deteriorated at an early stage and the lip-shaped projection may fall off, making it impossible to withstand long-term use. There is.

Further, each lip-shaped projection of another conventional sealing member is formed by making a large number of cuts in the longitudinal direction of the sealing member. But,
It is difficult to make a large number of cuts in the longitudinal direction of the seal member, and there is a problem that productivity is poor.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a scroll-type fluid machine in which a sealing member can surely make a mating member slidably contact a tooth bottom surface and sealing performance can be improved. It is intended to be.

[0025]

In order to solve the above-mentioned problems, a scroll-type fluid machine according to the present invention comprises a fixed scroll having a spiral wrap portion erected on the tooth bottom surface of a head plate, and a fixed scroll having a spiral wrap portion. A revolving scroll having a spiral wrap portion erected on the bottom surface of the tooth of the head plate so as to define a plurality of compression chambers with the wrap portion of the fixed scroll. At least one of the wrap portions of the orbiting scroll and the orbiting scroll has a groove formed in the tooth surface of the wrap portion, and a seal member is provided in the groove so as to slidably contact the bottom surface of the other tooth. Is adopted.

A feature of the structure adopted by the first aspect of the present invention is that a plurality of seal pieces extending at right angles toward the bottom side of the concave groove are formed integrally with the seal member. It is in.

A feature of the structure adopted by the invention of claim 2 is that the seal member includes a plurality of seal pieces that are curved and extended in an arc shape toward the bottom side of the concave groove and the seal member. It is formed integrally.

[0028]

According to the above construction, the seal member is erected at a right angle to the seal member and is constantly pushed up toward the tooth bottom surface of the counterpart by a plurality of seal pieces extending toward the bottom side of the concave groove. Always in contact with the tooth bottom. Thereby, even if the pressure of the compressed fluid becomes sufficiently high and does not act, the seal member slides securely on the tooth bottom surface of the other party,
A uniform sealing property is exhibited at all locations in the longitudinal direction of the sealing member.

Each seal piece of the seal member always blocks a gap formed in the circumferential direction between the seal member and the bottom surface of the concave groove. Thereby, the compressed fluid is always prevented from leaking outside through the gap.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiment, the same components as those in the prior art shown in FIGS. 9 to 11 are denoted by the same reference numerals, and description thereof will be omitted.

First, FIGS. 1 to 7 show a first embodiment of the present invention.

In the drawing, reference numeral 21 denotes a sealing member mounted in the concave groove 5 of the fixed scroll 1;
Reference numeral 1 denotes a rectangular cross section made of an elastic resin material having abrasion resistance and self-lubricating properties, for example, a fluorine-based resin such as polytetrafluoroethylene (PTFE), in substantially the same manner as the seal member 6 described in the prior art. And extends spirally along the length direction of the concave groove 5. The surface that slides on the tooth bottom surface 8A of the other party is the seal surface 21A.

However, the sealing member 21 according to the present embodiment
As shown in FIGS. 1 and 2, a plurality of seal pieces 21C, 21C,... Are formed integrally with the seal member 21 on a bottom side surface 21B facing the bottom side of the concave groove 5. Each of the seal pieces 21C projects at a right angle from the bottom side surface 21B of the seal member 21 and extends linearly.

As shown in FIG. 1, the seal member 21 has a height H1 from the seal surface 21A to each seal piece 21C, and a distance H2 (from the mating tooth bottom 8A to the bottom of the groove 5). (See FIG. 4). Therefore, when the seal member 21 is mounted in the concave groove 5, each seal piece 21C is elastically deformed and curved in the concave groove 5 as shown in FIG. As a result, the seal member 21 is constantly pushed up toward the mating tooth bottom surface 8A by the elastic force of each seal piece 21C, and the sealing surface 21A always comes into sliding contact with the mating tooth bottom surface 8A.

Further, as shown in FIG. 4, the seal member 21 is mounted such that each seal piece 21C bends and deforms in a certain direction in the concave groove 5. That is, the left side in FIG. 4 is the high pressure side (the side near the center of the scroll), and each seal piece 21C is curved and deformed so that the arc-shaped concave portion 21C1 faces the high pressure side. Accordingly, during the compression operation, the compressed air that enters the gap between the seal member 21 and the bottom surface of the concave groove 5 and tries to flow from the high pressure side to the low pressure side in the direction of arrow B is deformed into an arc shape of each seal piece 21C. The concave portion 21C1 receives the light. As a result, the pressure of the compressed air causes the seal member 21 to be pressed against the other tooth bottom surface 8A, and the distal end side of each seal piece 21C to be pressed against the bottom surface of the concave groove 5.

A seal member similar to the seal member 21 having the above-described seal pieces 21C is mounted in the concave groove 11 formed in the wrap portion 9 of the orbiting scroll 7. However, the detailed configuration is the same as that of the seal member 21 and will not be described.

Next, a method of manufacturing the seal member 21 will be described with reference to FIGS.

In FIG. 5, reference numeral 31 designates a molding apparatus.
Reference numeral 2 denotes a movable mold, and 33 denotes a fixed mold. The fixed mold 33 is provided with a cavity 33A formed into a predetermined shape for molding the seal member 21, and a bottom side of the cavity 33A is provided. , For removing the molded product are provided. In addition, the movable mold 32 and the fixed mold 33 are processed with high precision at the mating surface of the movable mold 32 and the fixed mold 33 so that no burr or the like is generated on the molded product. Polishing, drafting, and the like are provided to improve moldability, so that post-processing of a molded product is not required.

First, the movable mold 32 and the fixed mold 33 are heated by a heater (not shown). Here, the heating temperature is about 280 to 330 ° C., which is suitable for softening and dissolving the resin material as the material of the sealing member 21 as a molded product.

Next, as shown in FIG. 6, a precisely measured predetermined amount of resin material particles 35, 35,. As the resin material used here, PFA (perfluoroalkyl vinyl ether copolymer resin) or a PFA-modified type is mainly used among PTFE (polytetrafluoroethylene).

Next, while moving the movable mold 32 downward, the resin material charged into the cavity 33A of the fixed mold 33 is pressurized to gradually soften the resin material, and as shown in FIG. After forming the shape of 21, the sample is cooled.

Finally, the movable mold 32 is moved upward,
Each of the removal pins 34 provided on the fixed mold 33 is projected upward into the cavity 33 </ b> A, and the seal member 21 is released from the fixed mold 33. Thus, the sealing member 21 is manufactured by one compression molding.

The scroll type air compressor according to the present embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art.

However, the sealing member 21 according to the present embodiment
Are constantly pushed up toward the mating tooth bottom surface 8A by the sealing pieces 21C, and the sealing surface 21A of the sealing piece 21 is always in contact with the mating tooth bottom surface 8A. As a result, the seal member 21 according to the present embodiment does not float and seal on the other tooth bottom surface 8A with the compressed air during the compression operation as in the seal member 6 (12) according to the related art, but the compressed air acts. Even if the compression operation is not performed, the sealing member 21 is always in sliding contact with the other tooth bottom surface 8A, so that the sealing property of the seal member 21 can be sufficiently exhibited even immediately after the start of the compression operation, and leakage of compressed air can be reliably prevented.

In particular, during the compression operation, the compressed air which has entered the concave groove 5 presses the bottom side surface of the seal member 21.
The sealing member 21 is reliably brought into sliding contact with the mating tooth bottom surface 8A by the elastic force of each sealing piece 21C and the pressure of the compressed air. As a result, uniform sealing properties can be exhibited at all locations in the longitudinal direction of the sealing member 21, and the sealing properties can be significantly improved.

Each seal piece 21C of the seal member 21
Accordingly, a gap formed in the circumferential direction between the seal member 21 and the bottom surface of the concave groove 5 is always blocked. Thereby, each seal piece 21C of the seal member 21 according to the present embodiment is provided.
Is not deformed elastically by compressed air at the time of compressing operation like a lip-shaped protrusion of a seal member according to another conventional technique, so that it is not in sliding contact with the bottom surface of the groove or the like. Since it is in sliding contact with the bottom surface of the groove 5, even immediately after the start of the compression operation, the compressed air in each compression chamber 15 on the innermost peripheral side flows through the gap toward the compression chamber 15 on the low pressure side,
Leakage to the outside can be reliably prevented.

Further, the sealing member 21 is provided with a sealing surface 21A of the sealing member 21 opposed to the tooth bottom surface 8A of the other party.
The dimension H1 from the end of each seal piece 21C to the tip of each seal piece 21C is
Is formed so as to be longer than the distance H2 from the bottom surface to the tooth bottom surface 8A of the other party, so that when the sealing member 21 is mounted in the concave groove 5, the sealing surface 21A of the sealing member 21 becomes In a state of sliding contact with 8A, each seal piece 21C of the seal member 21 is pressed against the bottom surface of the concave groove 5 and elastically deformed and curved. Thereby, the seal member 21 is pushed up to the mating tooth bottom surface 8A by the elastic force of each seal piece 21C, and the seal surface 21A can be brought into sliding contact with a certain pressing force.
1 can enhance the sealing performance.

Thus, according to the present embodiment, the seal member 21 can be constantly pushed up toward the mating tooth bottom surface 8A by each seal piece 21C, and the sealing property of the seal member 21 can be maintained even immediately after starting the compression operation. The seal surface 21A of the seal member 21 can be fully exerted by the elastic force of each seal piece 21C and the pressure of the compressed air that has entered the concave groove 5, and the seal surface 21A of the seal member 21 can be fully exerted.
A can be slidably contacted with A, and the airtightness of each compression chamber 15 can be maintained by sealing without any gap over the entire surface.

Each seal piece 21C of the seal member 21
Accordingly, a gap formed in the circumferential direction between the seal member 21 and the bottom surface of the concave groove 5 can be always blocked, and the compressed air in each compression chamber 15 can be reliably prevented from leaking through the gap. . In particular, even immediately after the start of the compression operation, each seal piece 2
1C is in sliding contact with the bottom surface of the groove 5, so that leakage of compressed air is reliably prevented immediately after the start of the compression operation, and each compression chamber 15
The internal pressure can be increased in a short time, and the compression efficiency can be greatly improved.

Further, each seal piece 21C of the seal member 21 according to the present embodiment is integrally formed in a shape projecting at a right angle from the bottom side surface 21B of the seal member 21, and FIG.
As shown in (1), although it is elastically deformed, it always keeps a constant shape. That is, each seal piece 21 of the seal member 21
C does not undergo large elastic deformation due to the compressed air flowing through the concave groove every time the compression operation is started, unlike the lip-shaped projection of the seal member according to the related art. Therefore,
The sealing piece 21 of the sealing member 21 can be used for a long time.
C is hardly deteriorated, and is not elastically deformed so that a fragile portion is not formed.
1C can be reliably prevented from falling off, and the durability of the seal member 21 can be improved.

Further, since the seal member 21 according to the present embodiment is manufactured by the manufacturing method as shown in FIGS. 5 to 7 as described above, each seal piece 21C can be easily formed. That is, in order to manufacture a lip-shaped projection of a seal member according to another conventional technique, a complicated operation such as making a large number of cuts in the longitudinal direction of the seal member must be performed. 21
Can easily form each seal piece 21C by a single molding, greatly improve productivity, and reduce manufacturing costs.

Next, FIG. 8 shows a second embodiment according to the present invention. The feature of this embodiment lies in that each seal piece of the seal member is formed into an arcuate shape.

In the drawing, reference numeral 41 denotes a sealing member according to the present embodiment. The sealing member 41 is made of a resin material having abrasion resistance and self-lubricating property in a substantially strip-like manner as in the first embodiment. And is mounted in the concave groove 5 of the wrap portion 3. The sealing member 41 has a sealing surface 41A on the upper surface that is in sliding contact with the tooth bottom surface 8A on the other side, and a bottom surface 41B on the surface facing the bottom surface of the concave groove 5.

A plurality of seal pieces 41C, 41C,... Protruding downward from the bottom side surface 41B are formed integrally with the seal member 41 according to the present embodiment. Each of the seal pieces 41C has an arcuate shape.

The sealing member 41 has a sealing surface 41.
The height dimension H1 'from A to the sealing piece 41C is formed to be larger than the distance from the mating tooth bottom surface 8A to the bottom surface of the concave groove 5. For this reason, when the seal member 41 is mounted in the concave groove 5, each seal piece 41C is elastically deformed in the concave groove 5, and becomes a curved arc. As a result, the seal member 41 is constantly pushed up toward the mating tooth bottom surface 8A by the elastic force of each seal piece 41C, and the sealing surface 41A always comes into sliding contact with the mating tooth bottom surface 8A.

Further, the sealing member 41 is arranged so that the left side in FIG. As a result, during the compression operation, the compressed air that has entered the gap between the seal member 41 and the bottom surface of the concave groove 5 is forced into the respective seal pieces 41C.
In the arcuate recess 41C1. As a result, the seal member 41 is pressed against the mating tooth bottom surface 8A by the pressure of the compressed air, and the distal end side of each seal piece 41C is pressed against the bottom surface of the concave groove 5.

A seal member similar to the seal member 41 having the above-described seal pieces 41C is mounted in the concave groove 11 formed in the wrap portion 9 of the orbiting scroll 7, and the detailed configuration thereof will be described. Are omitted since they are the same as those of the seal member 41.

Although the seal member having such a configuration can provide substantially the same operation and effect as that of the first embodiment, in particular, in this embodiment, the seal piece 41C of the seal member 41 is formed in an arc shape. Since it is formed, when it is installed in the concave groove 5, each seal piece 41C is easily bent, and the bending direction is determined by the preformed arc-shaped direction, so that the directions of the bending deformation can be aligned. . As a result, during the compression operation, the compressed air that has entered the concave groove 5 is received by the concave portion 41C1 of each seal piece 41C and the bottom side surface 41B of the seal member 41, so that the seal member 41 is pressed against the tooth bottom surface 8A of the partner. At the same time, each seal piece is pressed against the bottom surface of the groove 5. Therefore, each seal member 41
Can be reliably brought into sliding contact with the other tooth bottom surface 8A,
The gap between the tooth bottom surface 8A and the wrap portion 3 can be air-tightly sealed, and the gap between the seal member 41 and the bottom surface of the concave groove 5 can be reliably blocked by each seal piece 41C. Leakage can be prevented.

In the above embodiments, the sealing member 21 (41) is mounted in the groove 5 on the fixed scroll 1 side, and the sealing member 21 (41) is also mounted on the groove 11 on the orbiting scroll 7 side.
Although it has been described that the same sealing member as that of (41) is mounted, the present invention is not limited to this, and a concave groove is formed in one of the wrap portions on the fixed scroll 1 side or the orbiting scroll 7 side. A configuration in which a seal member is mounted in the groove may be adopted.

In each of the above embodiments, a scroll type air compressor has been described as an example of a scroll type fluid machine. However, the present invention can be widely applied to, for example, a vacuum pump and a refrigerant compressor.

[0061]

As described above in detail, according to the present invention, the seal member is erected from the inside of the groove by a plurality of seal pieces that are erected at right angles to the seal member and extend toward the bottom side of the groove. Can be constantly pushed up to the bottom of the tooth. Accordingly, the seal member can be reliably brought into sliding contact with the tooth bottom surface of the other party, and uniform sealing properties can be exerted at all locations in the longitudinal direction of the seal member. Therefore, the sealing performance of the sealing member can be significantly improved, and the leakage of the compressed fluid can be reliably prevented.

Further, each seal piece of the seal member always blocks a gap formed between the seal member and the bottom surface of the concave groove, and the compressed fluid leaks to the outside through the gap. Can always be prevented. Thus, even immediately after the start of the compression operation, leakage of the fluid can be prevented by the sealing action of the seal member, so that the pressure rise of the fluid can be accelerated, and the compression efficiency can be greatly improved.

Further, since each seal piece of the seal member is erected at right angles to the seal member and keeps a constant shape while the seal member is pushed up to the bottom surface of the mating tooth, the seal member is always kept constant. The fragile portion and the like are not deteriorated by the elastic deformation. Therefore, the life of the seal member can be prolonged, and the durability can be improved.

Further, the sealing member can be easily processed by compression molding, and the production cost can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an external view showing a seal member of a scroll-type air compressor according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state where the seal member shown in FIG. 1 is mounted in a concave groove of a wrap portion.

FIG. 3 is a longitudinal sectional view showing a wrap portion, a seal member, and the like of the scroll air compressor according to the first embodiment.

FIG. 4 is a sectional view as seen from the direction of arrows IV-IV in FIG. 3;

FIG. 5 is a sectional view showing an apparatus for forming a seal member.

FIG. 6 is a cross-sectional view showing a state in which a resin material as a material of a sealing member is charged into a cavity of a fixed mold of the molding apparatus.

FIG. 7 is a cross-sectional view showing a state where a movable mold of the molding apparatus is fitted to a fixed mold and a resin material is pressed.

FIG. 8 is an external view showing a seal member of a scroll air compressor according to a second embodiment of the present invention.

FIG. 9 is a longitudinal sectional view showing a fixed scroll, an orbiting scroll, seal members, and the like of a scroll-type air compressor according to the related art.

FIG. 10 is a sectional view taken in the direction of arrows XX in FIG. 9;

11 is an enlarged vertical sectional view showing a wrap portion, a seal member, and the like on the fixed scroll side in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed scroll 2,8 End plate 2A, 8A Tooth base 3,9 Lapping part 5,11 Concave groove 7 Orbiting scroll 15 Compression chamber 21,41 Seal member 21C, 41C Seal piece

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiki Takei 1-3-6 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Tokiko Corporation (72) Inventor Junichi Nagasawa 1-6-1, Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 3 Tokiko Co., Ltd. (72) Takashi Saito 1-6-3, Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Tokiko Co., Ltd. (56) References JP-A-63-6701 (JP, A) JP-A-55 −49502 (JP, A) Japanese Utility Model Application Sho 61-179301 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04C 18/02 311

Claims (2)

(57) [Claims] 1. A fixed scroll in which a spiral wrap portion is provided upright on a tooth bottom surface of a head plate, and a plurality of compression chambers are defined between the fixed scroll and a wrap portion of the fixed scroll. A swirling scroll in which a spiral wrap portion is provided upright on the tooth bottom surface of the end plate so as to form, at least one of the wrap portions of the fixed scroll and the orbiting scroll has the wrap portion. In a scroll type fluid machine having a groove formed in a tooth tip surface and a seal member which is slidably brought into contact with a bottom surface of a mating tooth in the groove, the seal member has a groove directed toward a bottom side of the groove. A plurality of seal pieces extending at right angles to each other and integrally formed with the seal member. 2. A fixed scroll in which a spiral wrap portion is provided upright on a tooth bottom surface of a head plate, and a plurality of compression chambers are provided between the fixed scroll and the fixed scroll wrap portion. A swirling scroll in which a spiral wrap portion is provided upright on the tooth bottom surface of the end plate so as to form, at least one of the wrap portions of the fixed scroll and the orbiting scroll has the wrap portion. In a scroll type fluid machine having a groove formed in a tooth tip surface and a seal member which is slidably brought into contact with a bottom surface of a mating tooth in the groove, the seal member has a groove directed toward a bottom side of the groove. A scroll type fluid machine wherein a plurality of seal pieces which are curved and extended in an arc shape are formed integrally with the seal member.