JPH11148469A - Rotary scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the occurrence of noise, and smoothly circulate lubricating oil. SOLUTION: This compressor allows two scrolls 1 and 2 in which the scroll tooth of each scroll is formed into an inviolate spiral, to keep the difference in phase of 180 deg. in the circumferential direction, and both the scrolls are disposed so as to be deviated in the radial direction, so that both the scrolls are rotated at the identical speed in the identical direction in the inside of a main body 3. In this case, the circular shaped hole 1b of its radius (θr-t+α) is provided on the first scroll 1 at a place over a center line free of interfering with the scroll tooth 1d, which passes through the center of its basic circle, concurrently, the relative difference in phase between the center of the circular shaped hole 1b and the first scroll 1, is made to be 0 deg., and furthermore, a pin 2a of a radius α is provided, the relative difference in phase from the center of the second scroll 2 of which is 180 deg. are a place passing through the center of the basic circle over the center line free of interfering with the scroll tooth 1b, in such a way that the pin 2a is fitted into the circular shaped hole 1b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a rotary scroll compressor.

[0002]

2. Description of the Related Art Rotary scroll compressors generally use a fixed scroll and an orbiting scroll of 180 °.
, The orbiting scroll is rotated from the center of the base circle of the fixed scroll by a rotation radius of πrt without rotating, and the volume of the closed space generated by fitting the teeth of both scrolls is varied. This is to compress the fluid using this. Here, r is the radius of the base circle of the fixed scroll, and t is the tooth width of the scroll.

In the case of a rotary scroll compressor having such a structure, a plurality of closed spaces are generated, and it becomes possible to gradually increase the pressure difference between the low-pressure section and the final high-pressure section in the plurality of closed spaces. This enables smoother compression than a normal reciprocating compressor or a rotary compressor.

However, the orbiting scroll movement in the rotary scroll compressor requires a rotation preventing mechanism and a crank mechanism, and the structure thereof is complicated. In addition, the motion of the orbiting scroll has a radius of πrt.
It was difficult to spread the lubricating oil and the like evenly because of the turning in the small range, which caused seizure.

The applicant has disclosed a drive mechanism for a scroll compressor which does not require such a turning movement.
Japanese Patent Publication No. 57-49721 has already proposed a similar concept. Japanese Patent Publication No. 57-49721 discloses a scroll compressor that does not require this orbital motion. it can. Therefore, this drive mechanism will be referred to as a rotary scroll in this specification, and will be treated as a known one.

[0006]

SUMMARY OF THE INVENTION In order to realize a rotary scroll driving mechanism, Japanese Patent Application Laid-Open No. Sho 62-24888 has been proposed.
In Japanese Patent Publication No. 8 (1993), gear teeth are formed on the back plates of both scrolls, and a transmission gear is interposed between both scrolls. However, in the structure disclosed in Japanese Patent Application Laid-Open No. 62-248888, mechanical noise of the gears is generated, resulting in impaired silence.

A similar wrapping structure is disclosed in Japanese Patent Publication No. 57-49721. On page 9, right column, lines 24 to 26 of the same publication, "In FIG. The difference between Ds and Dd has been greatly exaggerated for better illustration. ", Which regulates the pressure at the scroll contact line rather than the drive link contemplated by the present invention. The purpose is to create a centripetal force for the purpose.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional rotary scroll compressor. The rotary scroll compressor according to the first aspect of the present invention has a structure in which each scroll is provided in a main body. The first and second scrolls having teeth formed by involute spirals are rotated by 180 ° in the circumferential direction.
And each of the scroll teeth is shifted in the radial direction so that the relative distance between the centers of the base circles of the two scrolls when the base circle radius is r and the tooth width is t is πrt. Wherein the first and second scrolls are rotated in the same direction at the same speed in the main body, wherein the first scroll has a center line passing through the center of a base circle of the first scroll. A circular hole having a radius of πr−t + α is provided at a position that does not interfere with the scroll teeth, the relative phase difference between the circular hole and the center of the first scroll is 0 °, and the second scroll has A pin having a radius α whose relative phase difference with the center of the second scroll is 180 ° is provided at a position not interfering with the scroll teeth on the center line passing through the center of the base circle of the second scroll. Fit in circular hole Characterized in that so as to.

According to this configuration, when the first scroll rotates, the rotation force of the first scroll is transmitted to the second scroll by fitting the pin and the circular hole.
As a result, since the pin transmits the rotational force of the first scroll to the second scroll via the circular hole, the transmission of the rotational force becomes extremely smooth, and the compressor can be driven without generating noise. it can.

In the rotary scroll compressor according to the present invention, each of the first and second scrolls in which each scroll tooth is formed by an involute spiral in the main body is rotated by about 180 ° in the circumferential direction. In addition to disposing them with a phase difference, they are displaced in the radial direction so that the relative distance between the base circle centers of both scrolls when the base circle radius of each scroll tooth is r and the tooth width is t is πrt. The first scroll and the second scroll are rotated in the same direction at the same speed in the main body, wherein the first scroll includes a scroll tooth on a center line passing through a center of a base circle of the first scroll. A spherical hole is provided at a position that does not interfere with the first scroll, the relative phase difference between the spherical hole and the center of the first scroll is 0 °, and the second scroll has Wherein in a position which does not interfere with the scroll teeth on the center line through the base circle center of the second scroll second
A sphere having a relative phase difference of 180 ° with the center of the scroll is provided, and the sphere is fitted into the spherical hole,
Further, the relationship between the inner radius r1 of the spherical hole and the outer radius r2 of the sphere is such that r1 = πr + r2.

According to this configuration, when the first scroll rotates, the rotational force of the first scroll is transmitted to the second scroll by fitting the ball and the spherical hole. As a result, since the ball transmits the rotational force of the first scroll to the second scroll via the spherical hole, the transmission of the rotational force becomes extremely smooth, and the compressor can be driven without generating noise. it can.

The rotary scroll compressor according to the third aspect of the present invention is the rotary scroll compressor according to the first or second aspect.
An oil groove extending along the scroll teeth is provided at the center of the upper surface of the scroll teeth that is in contact with the other scroll, and an oil through hole communicating with the oil groove is provided at the innermost periphery of each scroll tooth. And an oil inlet is provided in the center of both sides of the main body corresponding to the oil through hole,
Then, the lubricating oil sucked into the main body from the oil suction port flows into the oil groove through the oil through hole, and flows through the oil groove to reach the outermost peripheral portion of each scroll tooth, and thereafter, It is characterized in that it is made to pass through the gap between the back surface of each scroll and the inner surface of the main body and to return to the oil through hole.

According to this structure, when the scroll rotates, a centrifugal force acts in accordance with the rotation, and the oil groove of the scroll teeth is decompressed by the centrifugal force. The lubricating oil is automatically sucked into the main body from the oil inlet, and the lubricating oil sucked into the main body reaches the oil groove through the oil through hole of the scroll teeth, and then flows through the oil groove to scroll. When the tooth reaches the outermost peripheral portion of the tooth, it comes out of the oil groove, passes through the gap between the back surface of the scroll and the main body, and returns to the oil through hole again. As a result, the lubricating oil can be applied to the entire back surface of the scroll.

Further, the rotary scroll compressor according to the invention described in claim 4 is the rotary scroll compressor according to claim 1 or 2,
A plurality of pairs of the pin and the circular hole or a pair of the sphere and the spherical hole are provided at positions not interfering with the scroll teeth of the first and second scrolls.

According to this configuration, when the first scroll rotates, the rotational force of the first scroll is transmitted to the second scroll by fitting the pin and the circular hole or the ball and the spherical hole. As a result, since the pin or the ball transmits the rotational force of the first scroll to the second scroll through the circular hole or the spherical hole, the transmission of the rotational force becomes extremely smooth, and the compressor does not generate noise. Can be driven. In addition, since a plurality of pairs of pins and circular holes or spherical and spherical holes are provided, rotation can be transmitted more smoothly.

The rotary scroll compressor according to the invention described in claim 5 is the rotary scroll compressor described in claim 1 or 2,
The first scroll is connected to a driving motor, and the second scroll is freely rotated by receiving the torque of the first scroll by fitting the pin and the circular hole or the ball and the spherical hole. It is characterized by.

According to this configuration, the first scroll is the driving side, and the driving force of the driving motor is transmitted to the second scroll, so that the second scroll can be freely rotated. As a result, the first and second scrolls can be reliably rotated in the same direction at the same speed.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. [First Embodiment] FIG. 1 is a schematic structural view showing a first embodiment of a rotary scroll compressor according to the present invention. In this drawing, reference numeral 1 denotes a first scroll which forms a drive-side scroll, and which rotates a shaft portion 1c to a bearing portion 41 at the center of a casing 4a which forms a main body 3 together with a casing 4b via rotary bearings 13 and 14. By being freely supported, it is rotatably accommodated in the casing 3. Reference numeral 16 denotes a mechanical seal provided between the shaft portion 1c and the bearing portion 41 between the rotary bearings 13 and 14.

Reference numeral 2 denotes a second scroll which forms a driven scroll. The shaft 2c is connected to a bearing 42 of the casing 4b.
It is rotatably supported via a rotary bearing 15 so as to be rotatably accommodated in the casing 3.

The two scrolls are arranged in the main body 3 so that the phase difference between the scroll teeth 1d and 2d formed by the respective involute spirals is 180 °, and each scroll is attached to the respective scroll teeth 1d and 2d. The pins 1a, 2a and the circular holes 1b, 2b
b, and pins 1a and 2a and circular holes 1b and 2
When the first scroll 1 rotates, the rotation of the first scroll 1 is transmitted to the second scroll 2 by fitting the pins 1a, 2a and the circular holes 1b, 2b. The second scroll 2 rotates at the same speed as the first scroll 1. The rotation center of both scrolls is
Assuming that the radius of the base circle of the involute is r and the tooth width is t as shown in the figure, the relative distance πr−t between the centers of the base circles of both scrolls.
(The base circle radius r will be described later with reference to FIG.
And the base circle. ).

Reference numeral 6 denotes a sealing cap for sealing the end of the shaft portion 2c, and reference numeral 17 denotes the sealing cap 6 and the rotary bearing 15 described above.
A mechanical seal provided between the shaft portion 2c and the bearing portion 42 therebetween. Reference numeral 5 denotes a low-pressure side suction port provided on the outer peripheral portion of the side wall of the casing 4a. Gas is sucked from the low-pressure side suction port 5 and is discharged from the high-pressure side discharge port 6a through the scroll compression stroke in the main body 3. .

Reference numerals 7 and 8 denote oil inlets, which are provided at diagonal positions at the bases of the bearings 41 and 42 of the casings 4a and 4b. FIG. 2 is a schematic view of the scroll teeth 1d and 2d of the first and second scrolls 1 and 2 viewed from above, and FIG. 3 is a schematic cross-sectional view taken along line AA 'in FIG. 2 also shows the back plates of the first and second scrolls 1 and 2 not shown in FIG. 2). As shown in FIGS. 2 and 3, the lubricating oil sucked from the suction ports 7 and 8 penetrates through the innermost peripheral portions of the scroll teeth 1d and 2d of the first and second scrolls 1 and 2. The oil grooves 11 and 12 extend between the two scrolls through the provided oil through holes 9 and 10 and then extend in parallel with the scroll teeth at the center of the upper surface of the scroll teeth 1 d and 2 d according to the rotation of each scroll. It is sent to the outermost periphery of each scroll.

Then, the lubricating oil reaching the outermost circumference goes from the ends of the opened oil grooves 11 and 12 to the back surface of each scroll, passes through the space between the casing and the scroll, and returns to the oil passage hole again. It is configured to advance between the two scrolls from 9, 10. By the circulation process of the lubricating oil, the lubricating oil is effectively applied to the back plates of the first and second scrolls 1 and 2.

Here, the flow of the lubricating oil is automatically executed by the centrifugal force generated by the rotation of the first and second scrolls. That is, the centrifugal force generated by the rotation of the first and second scrolls acts on the oil groove to suck lubrication from the oil suction ports 7 and 8, and the sucked lubricating oil passes through the oil through holes 9 and 10 The oil is guided to the grooves 11 and 12 and flows in the oil groove in the outer circumferential direction of the scroll.
Then, when the lubricating oil exits the oil grooves 11 and 12, the lubricating oil then circulates again through the gap between the back surface of the scroll and the main body to the oil through hole.

FIG. 4 is a diagram for explaining the relationship between the two scrolls, in particular, the relationship between the center of the two scrolls and the pin and the circular hole. Pin 1 provided on each scroll
The a (2a) and the circular hole 1b (2b) are located on the center line where the center of each circle passes through the center of the base circle of each scroll.
That is, the center of the pin 1a is on the center line of the base circle of the driving scroll 1 having the pin 1a, and the center of the circular hole 2b corresponding to the pin 1a is the second scroll having the circular hole 2b. 2 are located on the center line of the base circle.

The scrolls 1 and 2 are arranged at a distance of δ. This distance δ is a value uniquely determined by the radius r of the base circle of the scroll and the tooth width t of the scroll as shown in FIG. 1, and is represented by δ = πr-t. On the other hand, when the radius of the pin is α, the inner radius δ + α of the circular hole, that is, πr−t
By setting + α, the pin comes into contact with the inner wall of the circular hole.

In other words, in the present invention, first, the scroll teeth 1 on the center line passing through the center of the base circle of the first scroll 1
A circular hole 1b having a radius of π−t + α is provided at the outermost position that does not interfere with d. The distance between the center of the base circle of the first scroll 1 and the center of the circular hole 1b is D, and
Assuming that the relative phase between the center of the first scroll 1 and the center of the circular hole 1b is 0 °, the center of the second scroll 2 is located on the center line passing through the center of the base circle of the second scroll 2. Is the distance D and the phase difference relative to the second scroll 2 is 180 °.
And the pin 2a is fitted into the circular hole 1b.

FIG. 5 shows the first and second scrolls 1, 2
It is a figure which shows the relationship between a pin and a circular hole when rotating. Here, when the pin 1a rotates counterclockwise about the rotation center A, since the pin 1a and the circular hole 2b are in contact with each other, the pin 1a is pushed by the pin 1a and the circular hole 2b is centered on the rotation center B in the figure. (Figures a and b). Further, when the pin 1a rotates and the center lines of both pins overlap, the rotational force of the pin 1a is not transmitted to the circular hole 2b (FIG. C).

FIG. 6 is a diagram showing the rotational operation state of the first and second scrolls 1 and 2 in the present invention from 0 ° to 315 ° at 45 ° intervals. In this figure, four pairs of the pin and the circular hole are provided on the outer periphery of the scroll as indicated by reference numerals a, b, c and d. In the state of 0 ゜,
When the pair of pins a rotates counterclockwise, the circular holes in contact with the pins are pushed by the pins and also rotate counterclockwise. This situation continues until both scrolls rotate 180 °.

After 180 °, the contact point between the pin and the circular hole at a and b is in the opposite direction to the rotation direction, so that the rotational force of the pin is not transmitted to the circular hole.
Since the pin d transmits the rotational force to the second scroll on the driven side similarly through the circular hole, the rotation of the scroll does not pulsate. In a and b where the contact point between the pin and the circular hole is in the opposite direction to the rotation direction, when a phase occurs in the rotation speed of the first and second scrolls 1 and 2, the contact point between the pin and the circular hole is An opposite force that cancels the difference is generated to control the phase. FIGS. 5D and 5E show a pin 1a in which a reverse force is generated and a circular hole 2b.

That is, two of the four pairs of pins and circular holes are used for driving, and the other two pairs are used for phase control, so that both scrolls can be rotated effectively. Here, an example in which four pairs of pins and circular holes are provided is described, but the same effect can be obtained if the number of pairs is two or more.

[Second Embodiment] As a second embodiment of the present invention, a ball and a spherical hole are provided in each scroll in place of the pin and the circular hole of the first embodiment. At this time, the relationship between the inner radius r1 of the spherical hole and the outer radius r2 of the sphere projected on a plane parallel to the plane where the scroll is developed and passing through the contact point between the inner surface of the spherical hole and the outer surface of the sphere is represented by r1 = πr + r2. The other members and scroll behavior of this embodiment are the same as those of the first embodiment.

In the first and second embodiments, a driving motor (not shown) is connected to the first scroll 1 to function as a driving side, while the second scroll 2 is operated. According to the relationship between the pin and the circular hole or the ball and the spherical hole which are fitted to each other, the driven scroll is freely rotated as the first scroll rotates.

[0034]

According to the present invention, the rotary scroll compressor according to the first aspect of the present invention has the first and second rotary teeth in which each scroll tooth is formed by an involute spiral in a main body. 2 are arranged so as to have a phase difference of 180 ° in the circumferential direction, and the base circle radius of each scroll tooth is r,
The two scrolls are displaced in the radial direction so that the relative distance between the base circle centers of the two scrolls when the tooth width is t is πrt, and both the first and second scrolls are moved at the same speed in the main body. In the first scroll, the first scroll has a radius πr-t at a position not interfering with scroll teeth on a center line passing through the base circle center of the first scroll.
A circular hole of + α is provided, the relative phase difference between the circular hole and the center of the first scroll is set to 0 °, and the second scroll passes through the center of the base circle of the second scroll. At a position that does not interfere with the scroll teeth on the center line, the relative phase difference with the center of the second scroll is 18
A pin having a radius α of 0 ° is provided, and the pin is fitted into the circular hole.

According to the present invention, when the first scroll is rotated, the rotational force of the first scroll is transmitted to the second scroll by the fitting of the pin and the circular hole. The rotational force of the first scroll is transmitted to the second scroll via the second scroll, and the transmission of the rotational force becomes extremely smooth, so that the compressor can be driven without generating noise.

In the rotary scroll compressor according to the second aspect of the present invention, the first and second scrolls in which the scroll teeth are formed by an involute spiral in the main body are rotated by about 180 ° in the circumferential direction. In addition to disposing them with a phase difference, they are displaced in the radial direction so that the relative distance between the base circle centers of both scrolls when the base circle radius of each scroll tooth is r and the tooth width is t is πrt. The first scroll and the second scroll are rotated in the same direction at the same speed in the main body, wherein the first scroll includes a scroll tooth on a center line passing through a center of a base circle of the first scroll. A spherical hole is provided at a position where the spherical hole does not interfere with the first scroll, the relative phase difference between the spherical hole and the center of the first scroll is 0 °, and the second scroll has Wherein in a position which does not interfere with the scroll teeth on the center line through the base circle center of the second scroll second
A sphere having a relative phase difference of 180 ° with the center of the scroll is provided, and the sphere is fitted into the spherical hole,
Further, the relationship between the inner radius r1 of the spherical hole and the outer radius r2 of the sphere is such that r1 = πr + r2.

According to the present invention, when the first scroll rotates, the rotational force of the first scroll is transmitted to the second scroll by fitting the ball and the spherical hole. Therefore, since the spherical shape transmits the rotational force of the first scroll to the second scroll through the spherical hole, the transmission of the rotational force becomes extremely smooth, and the compressor can be driven without generating noise. .

The rotary scroll compressor according to the third aspect of the present invention is the rotary scroll compressor according to the first or second aspect,
An oil groove extending along the scroll teeth is provided at the center of the upper surface of the scroll teeth that is in contact with the other scroll, and an oil through hole communicating with the oil groove is provided at the innermost periphery of each scroll tooth. And an oil inlet is provided in the center of both sides of the main body corresponding to the oil through hole,
Then, the lubricating oil sucked into the main body from the oil suction port flows into the oil groove through the oil through hole, and flows through the oil groove to reach the outermost peripheral portion of each scroll tooth, and thereafter, The scroll is configured to pass through the gap between the back surface of each scroll and the inner surface of the main body and to return to the oil passage.

According to the present invention, when the scroll rotates, a centrifugal force acts with the rotation, and the oil groove of the scroll teeth is depressurized by the centrifugal force. The lubricating oil is automatically sucked into the main body from the oil inlet, and the lubricating oil sucked into the main body reaches the oil groove through the oil through hole of the scroll teeth, and then flows through the oil groove to scroll. When the tooth reaches the outermost peripheral portion of the tooth, it comes out of the oil groove, passes through the gap between the back surface of the scroll and the main body, and returns to the oil through hole again. Therefore, the lubricating oil can be efficiently applied to the entire rear surface of the scroll.

The rotary scroll compressor according to the invention described in claim 4 is the rotary scroll compressor described in claim 1 or 2,
A plurality of pairs of the pin and the circular hole or pairs of the sphere and the spherical hole are provided at positions not interfering with the scroll teeth of the first and second scrolls.

According to the present invention, when the first scroll rotates, the rotational force of the first scroll is transmitted to the second scroll by fitting the pin and the circular hole or the ball and the spherical hole. Therefore, since the pin or the ball transmits the rotational force of the first scroll to the second scroll through the circular hole or the spherical hole, the transmission of the rotational force becomes extremely smooth, and the compressor can be operated without generating noise. Can be driven. In addition, since a plurality of pairs of pins and circular holes or spherical and spherical holes are provided, rotation can be transmitted more smoothly.

Further, the rotary scroll compressor according to the invention described in claim 5 is the rotary scroll compressor described in claim 1 or 2,
The first scroll is connected to a driving motor, and the second scroll is configured to rotate freely by receiving the turning force of the first scroll by fitting the pin and the circular hole or the ball and the spherical hole. Things.

According to the present invention, the first scroll is the driving side, and the driving force of the driving motor is transmitted to the second scroll, so that the second scroll can be freely rotated. Therefore, the first and second scrolls can be reliably rotated in the same direction at the same speed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a configuration of a rotary scroll compressor according to an embodiment of the present invention.

FIG. 2 is a diagram schematically illustrating first and second scrolls according to the present invention.

FIG. 3 is a view cut along a scroll line AA ′ in FIG. 2;

FIG. 4 is a diagram for explaining the relationship between the first and second scrolls, particularly the relationship between the center of both scrolls and the pin and the circular hole in the present invention.

FIG. 5 is a diagram illustrating a relationship between a pin and a circular hole when the first and second scrolls according to the present invention rotate.

FIG. 6 is an operation explanatory diagram illustrating a rotation operation of first and second scrolls according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st scroll 2 2nd scroll 3 Main body 7 Oil inlet 8 Oil inlet 9 Oil through hole 10 Oil through hole 11 Oil groove 12 Oil groove

Claims (5)

[Claims] 1. A first and a second scroll having respective scroll teeth formed by involute spirals arranged in the main body with a phase difference of 180 ° in a circumferential direction, and a base of each scroll tooth. When the radius of the circle is r and the tooth width is t, the relative distance between the centers of the base circles of both scrolls is π
The first scroll and the second scroll are rotated in the same direction at the same speed in the main body, and the first scroll includes the first scroll. A circular hole having a radius of πr−t + α is provided at a position not interfering with the scroll teeth on the center line passing through the center of the basic circle of the scroll, and the relative phase difference between the circular hole and the center of the first scroll is set to 0 °. And the second
In the scroll, a pin having a radius α whose relative phase difference with the center of the second scroll is 180 ° at a position not interfering with the scroll teeth on the center line passing through the center of the base circle of the second scroll is used. A rotary scroll compressor, wherein the pin is fitted in the circular hole. 2. A method according to claim 1, wherein the first and second scrolls each having a scroll tooth formed by an involute spiral have a phase difference of 180 ° in a circumferential direction, and a base of each scroll tooth. When the radius of the circle is r and the tooth width is t, the relative distance between the centers of the base circles of both scrolls is π
The first scroll and the second scroll are rotated in the same direction at the same speed in the main body, and the first scroll includes the first scroll. A spherical hole is provided at a position that does not interfere with scroll teeth on a center line passing through the center of the base circle of the scroll, a relative phase difference between the spherical hole and the center of the first scroll is set to 0 °, and the second The scroll of
A sphere having a phase difference of 180 ° relative to the center of the second scroll is provided at a position not interfering with the scroll teeth on a center line passing through the center of the base circle of the second scroll, and the sphere is formed into the spherical hole. And the relationship between the inner radius r1 of the spherical hole and the outer radius r2 of the sphere is r1 = πr +
A rotary scroll compressor characterized by r2. 3. An oil groove extending along the scroll teeth is provided at the center of the upper surface of the scroll teeth that contacts the other scroll, and an oil communicating with the oil grooves is provided at the innermost periphery of each scroll tooth. A through hole is provided, and an oil suction port is provided in the center of both sides of the main body corresponding to the oil through hole, and lubricating oil sucked into the main body from the oil suction port through the oil through hole. Pour into the oil groove, and flow through the oil groove to reach the outermost peripheral portion of each scroll tooth, and then pass through the gap between the back surface of each scroll and the inner surface of the main body to return to the oil through hole. The rotary scroll compressor according to claim 1 or 2, wherein: 4. A plurality of pairs of said pins and circular holes or pairs of spherical and spherical holes are provided at positions not interfering with the scroll teeth of said first and second scrolls. 3. The rotary scroll compressor according to 2. 5. The first scroll is connected to a driving motor, and the second scroll is freely rotated by receiving the rotational force of the first scroll by fitting the pin and a circular hole or a ball and a spherical hole. The rotary scroll compressor according to claim 1, wherein