JPH11270474A - Scroll fluid machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the cause of galling, etc., generated between lap parts, allow easy judgement whether the lap parts have filled the lifetime, and enhance the reliability, etc., of the device. SOLUTION: A stationary scroll 2 is made of a thermosetting resin material, while each revolving scroll 4 is made of a metal material. A variable crank is installed between the revolving scroll 4 and a drive shaft, and the revolving radius of the revolving scroll 4 is arranged as enlarging in compliance with the wear of the lap part 2D of the stationary scroll 2 when the lap part 2D has worn in relation to the lap part 4B of the revolving scroll 4. A projection 10 is furnished firmly in that part on the cylindrical part 2B of the stationary scroll 2 which mates with the outermost peripheral end of the lap part 4B. With this projection, the lap part 4B of the revolving scroll 4 is put in contact when the lap part 2D of the stationary scroll 2 has filled its lifetime, and the metallic sound generated at this time is transmitted to the operator as an alarm for wear.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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 In general, a scroll type fluid machine is known from Japanese Patent Application Laid-Open No. Hei 2-283888, etc. This scroll type fluid machine is provided with a casing and a spiral wrap portion provided on the end plate. A fixed scroll provided, a drive shaft rotatably supported by the casing, and a plurality of rotatable members provided at the tip end of the drive shaft in the casing so as to be overlapped with the wrap portion of the fixed scroll on the end plate. And a revolving scroll in which a spiral wrap portion defining the compression chamber is provided upright.

[0003] In this type of scroll type fluid machine according to the prior art, a drive shaft is rotationally driven from the outside, and the orbiting scroll is orbited with a fixed eccentricity with respect to the fixed scroll. While sucking a fluid such as air from the suction port, the fluid is sequentially compressed in each compression chamber between the wrap portion of the fixed scroll and the wrap portion of the orbiting scroll, and compressed from the discharge port provided at the center of the fixed scroll. The fluid is discharged to the outside.

[0004]

In the above-mentioned scroll type fluid machine according to the prior art, one of the wrap portions of the fixed scroll and the orbiting scroll is coated with a material having excellent wear resistance and the like. By doing so, the lap portions are prevented from coming into metallic contact with each other during the compression operation, and galling or the like is prevented from occurring between the lap portions.

However, even in this conventional technique, if the compression operation is performed for a long period of time, the coating layer formed on the lap portion is worn between the lap portion and the other lap portion. When worn, the metal surface side of the lap portion is exposed from the coating layer, and the lap portions may come into metal contact with each other. In this case, there is a problem that galling or the like occurs between the wrap portions, and the reliability or the like of the device is reduced.

Further, since the operator cannot easily judge from the outside of the apparatus how much the wear of the coating layer formed on such a wrap portion has progressed, the operator cannot easily determine the degree of wear of the wrap portion. There is a problem that it is difficult to prevent galling or the like beforehand.

The present invention has been made in view of the above-described problems of the prior art, and the present invention can avoid metal contact between lap portions even when a compression operation is performed for a long time, and can prevent galling and the like. It is another object of the present invention to provide a scroll-type fluid machine capable of eliminating the cause of the above problem, easily determining whether the wrap portion has reached the end of its life, and improving the reliability and the like of the device.

[0008]

In order to solve the above-mentioned problems, a scroll-type fluid machine according to the present invention comprises a casing, a fixed scroll provided on the casing and having a spiral wrap portion standing upright on a head plate. A drive shaft rotatably provided in the casing, and a pivot shaft provided in the casing at a tip end of the drive shaft so as to overlap the wrap portion of the fixed scroll on the end plate to define a plurality of compression chambers. And a revolving scroll on which a spiral wrap is provided.

The first aspect of the present invention is characterized in that at least one of the wrap portions of the fixed scroll and the orbiting scroll is formed of a resin material, and the wrap portion is formed between the fixed scroll and the orbiting scroll. Is provided with a wear detecting portion for detecting wear of the wrap portion made of the resin material.

[0010] With this configuration, at least one of the wrap portions of the fixed scroll and the orbiting scroll can be formed of a resin material. Contact can be avoided, and the wrap portion of the orbiting scroll can smoothly and slidably contact the wrap portion of the fixed scroll. Further, when the lap formed of the resin material is worn between the lap and the counterpart lap, the wear of the lap can be transmitted to the operator by the wear detection unit.

A feature of the structure adopted by the invention of claim 2 is that at least one of the wrap portions of the fixed scroll and the orbiting scroll is formed of a resin material, and the wrap portion made of the resin material has The wear detecting portion for detecting the wear of the wrap portion is embedded.

With this configuration, when the lap portion formed of the resin material is worn, the wear detecting portion embedded in the lap portion is exposed from the surface of the lap portion, and the wear of the lap portion is reduced by the operator. Can be told.

Further, according to the third aspect of the present invention, a turning radius variable mechanism for changing the turning radius of the orbiting scroll is provided between the drive shaft and the orbiting scroll.

With this configuration, when the lap formed of the resin material is worn between the lap and the counterpart lap, the turning radius of the turning scroll corresponds to the amount of wear of the lap by the turning radius variable mechanism. As a result, the wrap portion of the orbiting scroll can always be arranged at a position almost in contact with the wrap portion of the fixed scroll.

According to the fourth aspect of the present invention, the wear detecting portion is configured to generate a frictional sound when the lap portion made of the resin material is worn to the wear limit by sliding with the lap portion of the other party.

With this configuration, when the wrap portion made of a resin material is worn down to the wear limit by sliding with the wrap portion of the counterpart, the wrap portion of the fixed scroll, the wrap portion of the orbiting scroll, or the like is worn. , The friction sound at this time can be transmitted to the operator as a wear alarm sound.

According to the fifth aspect of the present invention, the wear detecting portion is formed of a plate made of a hard material harder than the resin material.

With this configuration, it is possible to prevent the wear detecting section from abrading between the lap section made of the resin material and the lap section when the lap section contacts the wear detecting section.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an oilless scroll type air compressor will be described as an example of a scroll type fluid machine according to an embodiment of the present invention with reference to the accompanying drawings.

FIGS. 1 to 4 show a first embodiment of the present invention. In the drawing, reference numeral 1 denotes a stepped cylindrical casing forming an outer frame of a scroll type air compressor. The casing 1 includes a bearing 1A formed in a small diameter stepped cylindrical shape, and a bearing 1A. An annular flange portion 1B extending radially outward from the base end side;
And a large-diameter portion 1C protruding in the axial direction from the outer peripheral side of B.

Reference numeral 2 denotes a fixed scroll fixed to the distal end side of the casing 1. The fixed scroll 2 is made of a thermosetting resin material having excellent wear resistance, heat resistance, etc., as shown in FIGS. It is formed as shown.

The fixed scroll 2 is formed in a substantially disk shape and has a mirror plate 2A whose center is aligned with an axis O1-O1 of a drive shaft 3 to be described later, and is integrally formed on the outer peripheral side of the mirror plate 2A. The formed cylindrical portion 2B, a flange portion 2C protruding radially outward from the outer peripheral side of the cylindrical portion 2B and attached to the opening end of the large diameter portion 1C of the casing 1, and an axial direction from the surface side of the end plate 2A A spiral wrap portion 2D that is erected and has a winding start end on the center side and a winding end end on the outer peripheral side, and a number of radiating plates 2E and 2 erected in parallel on the back side of the end plate 2A.
E,....

Here, the wrap portion 2D of the fixed scroll 2
Is formed with a thickness of dimension d as shown in FIG. Also, as described later, when the wrap portion 2D is worn and its thickness becomes the dimension d 'as shown in FIG. 4, the wrap portion 2D reaches the allowable life.

Reference numeral 3 denotes a drive shaft rotatably supported in a bearing portion 1A of the casing 1. The drive shaft 3 has a base end connected to a drive source (not shown), and a tip end provided with a casing 1 not shown. It extends into the bearing 1A. An insertion hole 3A into which a fitting shaft portion 8A of the variable crank 8, which will be described later, is inserted is provided on the distal end surface of the drive shaft 3.

Reference numeral 4 denotes a revolving scroll provided in the casing 1 so as to be revolvable opposite the fixed scroll 2. The revolving scroll 4 comprises a mirror plate 4A formed in a disk shape as shown in FIG. A spiral wrap portion 4B, which is erected in the axial direction from the front surface side of 4A and has a winding start end on the center side and a winding end end on the outer peripheral side, and a large number of radiating plates 4C erected in parallel on the back side of the end plate 4A. , 4C,.... Further, the orbiting scroll 4 has a heat sink 4C.
Is provided with a disk-shaped rear plate 4D at the end thereof, and a boss portion 4E is protruded from the center of the rear plate 4D.

The orbiting scroll 4 is disposed so as to overlap with the wrap portion 2D of the fixed scroll 2 by, for example, 180 degrees.
A plurality of compression chambers 5, 5,... Are defined between B. During the operation of the scroll air compressor, the air is sucked from the suction port 6 provided on the outer peripheral side of the fixed scroll 2 into the compression chamber 5 on the outer peripheral side while the air is being swirled by the orbiting scroll 4. Compressed air is sequentially compressed in each compression chamber 5, and finally compressed air is discharged from the compression chamber 5 on the center side to the outside through a discharge port 7 provided at the center of the fixed scroll 2.

Reference numeral 8 denotes the tip end of the drive shaft 3 and the orbiting scroll 4
The variable crank 8 is substantially the same as the variable crank described in Japanese Patent Application Laid-Open No. 9-147467 proposed by the present applicant. It is configured in.

Here, as shown in FIG. 1, the variable crank 8 has a fitting shaft 8A rotatably fitted in the insertion hole 3A of the drive shaft 3 and a rotating boss 4E of the orbiting scroll 4. And an eccentric shaft portion 8B provided so as to be capable of being provided.
Is disposed at a position where its axis O2-O2 is eccentric with respect to the axis O1-O1 of the drive shaft 3 by a dimension δ. The orbiting scroll 4 is rotated integrally with the drive shaft 3 during operation of the scroll type air compressor so that the orbiting scroll 4 has a turning radius of a dimension δ (hereinafter, turning radius δ).
).

When the wrap portion 2D of the fixed scroll 2 is worn, the variable crank 8 receives the combined force of the gas pressure in the compression chamber 5 and the centrifugal force due to the rotational force of the drive shaft 3 so that the variable crank 8 receives the drive force. It is configured to rotate relative to the other. As a result, the turning radius δ of the orbiting scroll 4 is increased by an amount corresponding to the amount of wear of the wrap portion 2D, and the wrap portion 4B of the orbiting scroll 4 is arranged in almost constant contact with the wrap portion 2D of the fixed scroll 2. Is done.

Furthermore, the variable crank 8 is provided with a counterweight 8C, and the counterweight 8C balances the rotation of the entire drive shaft 3 including the variable crank 8 with respect to the orbital movement of the orbiting scroll 4. .

Reference numeral 9 denotes a movable plate which constitutes a rotation preventing mechanism for preventing the orbiting scroll 4 from rotating. The movable plate 9 is slidable between the fixed scroll 2 and the orbiting scroll 4 in two axial directions orthogonal to each other. , The orbiting scroll 4 is prevented from rotating, and a circular motion (orbiting motion) having a turning radius δ is given to the orbiting scroll 4, thereby constituting a so-called Oldham coupling. .

Reference numeral 10 denotes a protrusion as a wear detecting portion provided integrally with the cylindrical portion 2B of the fixed scroll 2, and the protrusion 1
0 is formed as an elongated plate by using a material having a higher hardness than the wrap portion 2D of the fixed scroll 2 as shown in FIGS. 1 to 4, for example, an iron-based or aluminum-based hard material. It is curved and extends.

Here, the protrusion 10 is fixed to the fixed scroll 2.
Of the cylindrical portion 2B, is integrally fixed to a portion of the inner peripheral surface of the cylindrical portion 2B facing the outermost peripheral end of the wrap portion 2D, and radially inward from the cylindrical portion 2B of the fixed scroll 2 toward the wrap portion 4B of the orbiting scroll 4. And protrude by a certain dimension.

The wrap portion 2D of the fixed scroll 2
Is greatly worn, and when the wrap portion 4B of the orbiting scroll 4 which is the other party comes into contact with the projection 10 as shown in FIG.
The protruding portion 10 generates a frictional noise with the lap portion 4B, and thereby detects wear.

The protrusion 10 has a gap S between the wrap portion 4B of the orbiting scroll 4 and the wrap portion 4B as shown in the following equation (1).

[0036]

S <W × T S: gap between the wrap portion 4B of the orbiting scroll 4 and the projection 10 W: wrap portion 2D when the orbiting scroll 4 makes one rotation
Amount of wear of (fixed scroll 2) T: total number of rotations of orbiting scroll 4 when thickness of wrap portion 2D of fixed scroll 2 wears from dimension d to d '

Reference numeral 11 denotes a discharge pipe, and the discharge pipe 11 has a discharge port 7 at the base end thereof at the center of the fixed scroll 2.
, And the tip side protrudes outside, and is connected to an air tank or the like.

The scroll type air compressor according to the present embodiment has the above-described configuration, and its operation will be described next.

First, when the drive shaft 3 is rotated by the electric motor, the orbiting scroll 4 makes a circular motion (orbiting motion) having a turning radius δ around the drive shaft 3 and turns with the wrap portion 2D of the fixed scroll 2. Wrap part 4 of scroll 4
., B are continuously reduced. As a result, while the outside air sucked from the suction port 6 of the fixed scroll 2 is sequentially compressed in each of the compression chambers 5, the compressed air is discharged from the discharge port 7 of the fixed scroll 2 to the discharge pipe 11.
Through an external air tank or the like.

Here, the fixed scroll 2 includes a wrap portion 2
Since the entire D was formed using a thermosetting resin material having excellent wear resistance, heat resistance, etc., the wrap portion 2D was used during the compression operation.
Slides on the wrap portion 4B of the orbiting scroll 4 to prevent metal contact between the wrap portions as described in the related art, even when wear of the wrap portion 2D progresses as shown in FIG. This can prevent galling or the like from occurring between the wrap portions 2D and 4B.

Thus, in the present embodiment, during the compression operation, the wrap portion 4B of the orbiting scroll 4 can be kept in sliding contact with the wrap portion 2D of the fixed scroll 2 in a non-lubricated state. The performance can be stabilized for a long time, the noise can be reduced, and the reliability of the scroll air compressor can be improved.

When the wrap portion 2D of the fixed scroll 2 is worn as described above, the variable crank 8 integrated with the orbiting scroll 4 causes the gas pressure in the compression chamber 5 and the centrifugal force due to the rotational force of the drive shaft 3 to decrease. , And rotates relative to the drive shaft 3.

As a result, the turning radius δ of the orbiting scroll 4
Increases in accordance with the amount of wear of the wrap portion 2D, and accordingly, the wrap portion 4B of the orbiting scroll 4 gradually approaches the projection 10 provided on the cylindrical portion 2B of the fixed scroll 2.

The wrap portion 4B of the orbiting scroll 4
When the wrap portion 2D of the fixed scroll 2 wears out and reaches the allowable life, the wrap portion 4B of the orbiting scroll 4 becomes hard. By making frictional contact with the protrusion 10 made of a metal material or the like, a friction sound (metal sound) can be generated between the wrap portion 4B and the protrusion 10, and this can be transmitted to the operator as a wear alarm sound.

Thus, the operator can easily determine from the outside of the apparatus whether or not the wrap portion 2D of the fixed scroll 2 has reached the end of its life, and the safety and reliability of the apparatus can be further improved. . Then, when the wrap portion 2D of the fixed scroll 2 reaches the end of its life, by replacing the fixed scroll 2 with a new one, the durability and the life of the whole apparatus can be extended.

FIG. 5 shows a second embodiment of the present invention. The feature of this embodiment is that a projection is provided at the outermost end portion of the wrap portion of the orbiting scroll. is there. In this embodiment, the same reference numerals as in the first embodiment denote the same parts, and a description thereof will be omitted.

Reference numeral 21 denotes a protrusion serving as a wear detecting portion used in this embodiment. The protrusion 21 is made of an iron-based or aluminum-based metal material similarly to the protrusion 10 described in the first embodiment. It is formed as a plate body. The projection 21 is integrally fixed to the outermost peripheral end portion of the outer peripheral surface of the wrap portion 4B of the orbiting scroll 4.

Thus, the projecting portion 21 is configured to protrude radially outward from the outer peripheral surface of the wrap portion 4B of the orbiting scroll 4 toward the cylindrical portion 2B of the fixed scroll 2 by a predetermined size. The protrusion 21 has a gap S between the cylindrical portion 2B and the protrusion 2 set in the same manner as in Equation 1.

Thus, also in the present embodiment configured as described above, when the wrap portion 2D of the fixed scroll 2 is worn, the projection 21 provided on the wrap portion 4B side of the orbiting scroll 4 is moved to the cylindrical portion of the fixed scroll 2. By contacting the inner peripheral surface of 2B, it is possible to obtain substantially the same operation and effect as in the first embodiment.

FIGS. 6 to 8 show a third embodiment of the present invention. The feature of this embodiment is that a plate made of an iron-based or aluminum-based metal material as a wear detecting portion is used. , Which is embedded in the wrap portion of the fixed scroll. In this embodiment, the same reference numerals as in the first embodiment denote the same parts, and a description thereof will be omitted.

Reference numeral 31 denotes a metal plate as a plate used in the present embodiment. The metal plate 31 uses an iron-based or aluminum-based metal material as in the case of the protrusion 10 according to the first embodiment. Thereby, it is formed as a thin flat plate extending in an arc shape along the circumferential direction of the wrap portion 2D. The metal plate 31 is buried in the middle of the wrap portion 2D in the spiral direction.

Here, the thickness D (see FIG. 7) between the metal plate 31 and the outer peripheral surface of the wrap portion 2D is set to the following equation (2).

[0053]

## EQU2 ## D <W × T D: depth of burying metal plate 31 in wrap portion 2D W: wrap portion 2D when orbiting scroll 4 makes one rotation
Amount of wear of (fixed scroll 2) T: total number of rotations of orbiting scroll 4 when thickness of wrap portion 2D of fixed scroll 2 wears from dimension d to d '

Thus, also in the present embodiment configured as described above, when the wrap portion 2D of the fixed scroll 2 reaches the allowable life due to wear, the metal plate 31 is shown in FIG. 8 from the outer peripheral surface of the wrap portion 2D. As described above, when the wrap portion 4B of the orbiting scroll 4 comes into contact with the exposed metal plate 31, the friction sound (metal sound) at this time can be transmitted to the operator as a wear alarm sound. Almost the same effects as those of the first embodiment can be obtained.

In each embodiment, the entire fixed scroll 2 is formed of a resin material together with the wrap portion 2D.
Although the wrap portion 4B of the orbiting scroll 4 has been described as being formed of a metal material, the fixed scroll 2 may be formed of a metal material instead.
At least the wrap portion 4B may be formed of a resin material, and both wrap portions 2D and 4B may be formed of a resin material.

The wrap portion formed of a resin material among the wrap portions 2D and 4B of the fixed scroll 2 and the orbiting scroll 4 does not necessarily need to be formed entirely of a resin material. May be formed of a resin material, and the other portions may be formed of metal or the like.

In the third embodiment, the metal plate 31
Has been described as being provided at the intermediate portion of the wrap portion 2D of the fixed scroll 2 in the spiral direction. Alternatively, for example, the metal plate 31 may be provided near the outermost peripheral end of the wrap portion 2D. , May be provided near the innermost peripheral end.

In the third embodiment, the wrap portion 2D of the fixed scroll 2 is formed of a resin material, and the metal plate 31 is embedded in the wrap portion 2D. The wrap portion 4B of the scroll 4 may be formed of a resin material, and the metal plate 31 may be embedded in the wrap portion.

Further, in each of the embodiments, a scroll type air compressor has been described as an example of a scroll type fluid machine. However, the present invention is not limited to this, and can be widely applied to, for example, a vacuum pump, a refrigerant compressor and the like. .

[0060]

As described in detail above, according to the first aspect of the invention, at least one of the wrap portions of the fixed scroll and the orbiting scroll is formed of a resin material. The metal contact between the wrap portions as described above can be avoided, and the wrap portion of the orbiting scroll can smoothly and slidably contact the wrap portion of the fixed scroll. This makes it possible to stabilize the performance of the apparatus for a long period of time, reduce noise, and improve the reliability of the scroll fluid machine.

Further, when the wrap portion made of a resin material is worn, a wear detecting portion for detecting the wear is provided between the fixed scroll and the orbiting scroll. When abrasion occurs between the lap portion and the lap portion, it is possible to judge whether or not the lap portion has reached the end of its life from the outside of the device by the abrasion detection portion. Etc. can be extended.

Further, even when the wear detecting portion is embedded in the wrap portion made of a resin material as in the second aspect of the present invention, when the wrap portion is worn, the wear detecting portion is moved from the surface of the wrap portion. Thus, it is possible to obtain substantially the same effect as the first aspect of the present invention.

Further, according to the third aspect of the present invention, since the orbiting radius variable mechanism for changing the orbiting radius of the orbiting scroll is provided between the drive shaft and the orbiting scroll, the wrap portion made of a resin material is provided on the other side. Even when worn between the wrap portion and the wrap portion, the wrap portion of the orbiting scroll can always be arranged at a position almost in contact with the wrap portion of the fixed scroll, whereby the degree of sealing in the compression chamber can be increased, The compression efficiency of the scroll fluid machine can be increased. In addition, when the lap portion made of the resin material is worn by using the turning radius variable mechanism, the wear of the wrap portion can be detected by the wear detection unit.

Further, according to the fourth aspect of the present invention, when the lap portion made of the resin material is worn to the wear limit by sliding with the lap portion of the counterpart, a friction sound is generated between the wear detecting portion and the lap portion. With this configuration, when the wrap portion made of the resin material is worn to the wear limit by sliding with the wrap portion of the other party, the wrap portion of the orbiting scroll comes into contact with the wear detection portion, and the friction sound at this time is given as a wear alarm. The sound can be transmitted to the operator, and it can be easily determined whether or not the lap has reached the wear limit.

Further, in the case of the invention of claim 5, since the wear detecting portion is formed of a plate made of a hard material harder than the resin material, when the lap portion made of the resin material comes into contact with the wear detecting portion, Only the scroll member on the side of the worn wrap portion needs to be replaced, and the replacement of the wear detection unit can be eliminated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a scroll type air compressor according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view as seen from the direction of arrows II-II in FIG.

FIG. 3 is an enlarged sectional view of a main part in FIG. 2;

FIG. 4 is a cross-sectional view showing a state in which the wrap portion of the fixed scroll is worn, as viewed from the same position as in FIG. 2;

FIG. 5 is a partially enlarged view showing a wrap portion and a protrusion of a scroll type air compressor according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a scroll type air compressor according to a third embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a main part in FIG. 6;

FIG. 8 is a cross-sectional view showing a state in which the wrap portion of the fixed scroll is worn, as viewed from the same position as in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Fixed scroll 2A, 4A End plate 2B Tubular part 2D, 4B Lapping part 3 Drive shaft 4 Orbiting scroll 5 Compression chamber 8 Variable crank (turning radius variable mechanism) 10, 21 Projection part (wear detection part) 31 Metal plate (wear) Detector)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazutaka Sueto 1-6-3 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Tokiko Corporation

Claims (5)

[Claims] 1. A casing, a fixed scroll provided on the casing, and a spiral wrap portion provided on a head plate, a drive shaft rotatably provided on the casing, and the drive shaft in the casing. A scroll-type fluid machine comprising a revolving scroll, which is rotatably provided at the tip side of the revolving scroll, and in which a spiral wrap portion overlapping the wrap portion of the fixed scroll and defining a plurality of compression chambers on the end plate is provided. At least one of the wrap portions of the fixed scroll and the orbiting scroll is formed of a resin material, and between the fixed scroll and the orbiting scroll,
A scroll fluid machine according to claim 1, further comprising a wear detecting portion for detecting wear of said wrap portion made of said resin material. 2. A casing, a fixed scroll provided in the casing, and a spiral wrap portion standing upright on a head plate, a drive shaft rotatably provided in the casing, and the drive shaft in the casing. A scroll-type fluid machine comprising a revolving scroll, which is rotatably provided at the tip side of the revolving scroll, and a swirl-shaped wrap portion which is overlapped with the wrap portion of the fixed scroll on the head plate and defines a plurality of compression chambers. At least one of the wrap portions of the fixed scroll and the orbiting scroll is formed of a resin material, and a wrap portion made of the resin material is embedded with a wear detecting portion for detecting wear of the wrap portion. A scroll type fluid machine characterized by the above-mentioned. 3. The scroll-type fluid machine according to claim 1, further comprising a turning radius variable mechanism that changes a turning radius of the orbiting scroll between the drive shaft and the orbiting scroll. 4. The abrasion detecting section is configured to generate a friction noise when the lap section made of the resin material is worn to a wear limit by sliding with a lap section of a counterpart. 3. The scroll type fluid machine according to item 1. 5. The abrasion detecting section comprises a plate made of a hard material harder than the resin material.
5. The scroll-type fluid machine according to 2, 3, or 4.