JPH07259774A - Rotary type scroll compressor - Google Patents

Abstract

PURPOSE:To perform further reliable sealing of high and low seal parts, in a rotary type scroll compressor which has high and low pressure seal parts located between the end plate of a driven scroll and a bearing plate positioned facing the end plate. CONSTITUTION:The part, having high and low seal parts, of a bearing plate 6A is divided by the press-in cylindrical surface of a bearing. A corrugated spring washer 6E is located between the division inner member 6B and a bearing and movement in a thrust direction of the inner member 6B is practicable. The inner member 6B itself forms a seal member, a gap between the end plate of a driven scroll 2 and a bearing plate 6A is set to an optimum size, a lip seal is utilized as a seal between the outer periphery of the driven scroll 2 and the inner periphery of the bearing plate 6A, a double groove is formed in the seal part of the bearing plate 6A, and an outer groove is communicated with a high pressure part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary scroll compressor in which a scroll portion of a driving scroll and a scroll portion of a driven scroll are disposed so as to face each other so as to mesh with each other. Regarding the seal.

[0002]

2. Description of the Related Art FIG. 11 shows a main part of a conventional rotary scroll compressor. (A) is a vertical sectional front view, and (B) is an enlarged vertical sectional front view of a high / low pressure seal portion included in (A). FIG. 12 shows a structural example of a high / low pressure seal portion of a conventional rotary scroll compressor, (A) is a plan view,
(B) is a partially enlarged vertical front view of (A). In the rotary scroll compressor shown in FIG. 11, as shown in FIG. 11 (A), the scroll portion of the driving scroll 1 and the scroll portion of the driven scroll 2 are arranged so as to face each other so as to mesh with each other, and The discharge gas sucked from the mouth 3 and compressed by the two scrolls 1 and 2 is discharged through the discharge hole 5 inside the drive shaft 4 of the drive scroll 1. 6 is a bearing plate, 7 is a seal ring for high and low pressure seals, 8 is a wave spring washer, and 9 is an Oldham ring. Also, the high and low pressure seal parts are shown in FIG.
The seal ring 7 for high / low pressure sealing is constructed as shown in (B), and is made of a plastic material such as Teflon. The high and low pressure seals are shown in Fig. 1.
2 is constituted, 11 is a bearing plate, 12 is an inner groove, 12a is an inner seal ring,
Reference numeral 13 is an outer groove, 13a is an outer seal ring, and 14 is a back surface of the driven scroll.

[0003]

[Problems to be Solved by the Invention]

Problem 1: The conventional high-low pressure sealing method for a rotary scroll compressor as shown in FIG. 11 has the following problems. The dimensional accuracy of the groove processing is insufficient and the sealing of the seal ring in the side direction is not reliable. Since the material of the seal ring has a large coefficient of thermal expansion, a stable side seal in a wide temperature range cannot be expected. It was necessary to manage the end clearance as an aid to the seal in the end direction of the seal ring. Centrifugal force acts on the oil accumulated in the oil reservoir (see FIG. 11B) of the shoulder portion of the seal ring, causing a wedge effect on the thrust seal surface, separating the seal surface and causing a leak. Problem 2: Further, the conventional rotary scroll compressor has the following problems. In the case where the seal ring is pressed against the driven scroll by gas pressure or spring force, if the pressing is weak, leakage occurs, and if the pressing is strong, friction loss increases. In the case of the lip seal type, it is easy to control the pressing force, but the whole floats and the reliability tends to deteriorate. Problem 3: Moreover, the high / low pressure sealing method as shown in FIG. 12 has the following problems. By the high and low pressure sealing method on the back of the end plate of the driven scroll
Although a heavy seal ring is used, the amount of leak increases as the frequency increases. Also, the oil leaking from the inside should be sealed on the outside, but since the pressure between the seals is close to low pressure, the force that presses the outer seal ring against the back surface of the end plate of the driven scroll is weak, and leakage from the sliding surface occurs. I will end up. Problem 4: Moreover, the high / low pressure sealing method as shown in FIG. 11 has the following problems. Since high pressure is applied to the back surface of the driven scroll to perform end sealing, high pressure and low pressure must be separated at the sliding portion on the back surface of the driven scroll. Therefore, a seal ring is used for sealing, but its action is greatly affected by temperature and operating frequency, and stable sealing performance cannot be expected. Further, since the thrust sliding surface is a polished surface and has a low resistance, the leaked oil is easily scattered to the outer circumference by the centrifugal force. Problem 5: Further, the high / low pressure sealing method as shown in FIG. 11 has the following problems. The inner side of the seal ring separates the pressure from the low pressure part on the outside with the high pressure, and there is oil on the high pressure side, so the oil seal effect of the seal ring is enhanced and the sliding loss is reduced. The corner between the inner peripheral surface and the sliding surface was chamfered to form an oil reservoir. However, due to the centrifugal force acting on the oil, especially during high-speed operation,
There is a problem that a wedge effect of oil occurs on the thrust seal surface, the seal surface is separated, and an oil leak occurs. Further, since the seal ring and the sliding body are in relative swing motion, a force is exerted on the ring to push it toward the radial center, the direction of which changes sequentially with time. In particular, in the case of a non-ferrous soft material (resin such as Lulon or Teflon), there is a problem that a part of the ring is twisted inward or has an elliptical shape, which causes leakage from the side seal surface.

[0004]

According to the present invention, a scroll portion of a driving scroll and a scroll portion of a driven scroll are disposed so as to face each other so as to mesh with each other, and are sucked from a suction port and compressed by the two scrolls. The discharge gas is discharged through a discharge hole inside the drive shaft of the drive scroll, and a high and low pressure seal is provided between the end plate of the driven scroll and a bearing plate provided facing the end plate. In a rotary scroll compressor having a portion, in order to solve the problem 1, as an invention according to claim 1 (see FIG. 1), a portion having a high and low pressure seal portion of the bearing plate is a bearing. Is divided by the press-fitted cylindrical surface of the inside, and a corrugated spring washer is interposed between the divided inside member and the bearing, The invention provides a rotary scroll compressor capable of moving a material in a thrust direction, and, as an invention according to claim 2 (see FIG. 2), a portion having a high / low pressure seal portion of the bearing plate is a bearing. Is divided by the press-fitted cylindrical surface of the inner member, the divided inner member itself serves as a seal member, and a corrugated spring washer is interposed between the inner member and the bearing to thrust the inner member. In order to solve the problem 2 by providing a rotary scroll compressor capable of moving in a direction, an end plate of the driven scroll and the bearing are provided as an invention (see FIG. 3) of claim 3. Rotation in which a gap between the plate and the plate is set to 5 to 40 μ so as to seal between the high pressure portion of the inner peripheral portion of the bearing plate and the low pressure portion of the outer peripheral portion of the driven scroll. And a lip seal is used as a seal between the outer peripheral portion of the driven scroll and the inner peripheral portion of the bearing plate. The invention according to claim 5 (see FIG. 5), in order to provide a rotary scroll compressor in which a lip seal is fixed to the bottom of a seal groove, and to solve the problem 3.
In order to solve the problem 4, a rotary scroll compressor is provided in which a double groove is provided in a seal portion of the bearing plate and the outer groove is communicated with a high pressure portion. As a described invention (see FIGS. 6 and 7), a rotary scroll compression in which a labyrinth groove is formed on a surface having a seal ring groove on a thrust sliding surface between the bearing plate and the driven scroll. In order to solve the above-mentioned problem 5 by providing a machine, the cross-sectional shape of the seal ring provided in the high and low pressure seal portion is an inner peripheral sliding surface. A rotary scroll compressor in which the inner side of the sliding surface is inclined and the inner side of the sliding surface is oppositely chamfered, and , Claim 8 As inventors (see FIG. 9), a groove-shaped sealing ring provided on the high or low pressure seal portion is accommodated, whether the direction of the inner wall of the groove from the outer wall of the groove is lower,
Alternatively, the invention provides a rotary scroll compressor in which a slit is provided in a part of the inner wall of the groove, and, as the invention according to claim 9 (see FIG. 10), a seal ring provided in the high and low pressure seal part is provided. An object of the present invention is to provide a rotary scroll compressor in which a spring ring or spiral spring having elasticity in the radial direction is provided between the inner peripheral surface and the inner wall of the groove.

[0005]

[Action]

(1) According to the first and second aspects of the present invention, the end seal can be expected sufficiently, and the divisional portion can provide sufficient dimensional accuracy, and is not a sliding portion. Since it is easy, the side seal can be expected enough even though the thrust is movable. Also, where the side seal is insufficient, the end seal on the outside assists. Further, if importance is attached to the side seal, the thrust movable member itself may be used as the seal member without using the seal ring, and the thrust sliding surface may be narrowed to reduce the input. (2) According to the invention described in claim 3, when the gap between the bearing plate and the driven scroll is reduced,
Leakage decreases and friction loss increases. Here, the leak amount is 1% or less of the excluded volume when the gap is 40 μm or less, and the deterioration of the characteristics is proportional to the leak amount, so that it is not a serious problem. Also, the movement between the bearing plate and the driven scroll is an oscillating movement, and the friction loss has a gap of 5 μm.
If it is more than 60 W, it is 10 w or less at 60 HZ, which is a small value compared with the conventional seal in contact. (3) According to the invention of claim 4, the specification according to the invention of claim 3 is sufficient for a commercial power source, but at high speed rotation, the oil film is blown off and the seal becomes insufficient, so a seal part is required. Becomes The lip-type seal basically has good characteristics, but when it floats, the characteristics change and the reliability decreases. To cover this drawback, the material of the lip seal is Teflon-based. , And fix the seal to the groove with screws from below. The driven scroll and the lip seal are sealed on the upper surface in the same manner as in general, and the lip seal and the bearing plate are sealed on the outer peripheral portion of the lip seal by utilizing their softness. (4) According to the invention of claim 5, in order to increase the pressing force of the outer seal ring, a communication passage communicating with high pressure is provided in the outer groove, and high pressure is applied to the lower surface of the seal ring. Press the seal ring against the back surface of the driven scroll to eliminate leakage from the sliding surface of the seal ring. At this time, a V-shaped groove is formed on the back surface of the seal ring to prevent leakage from the side direction of the seal ring when high pressure is applied. (5) According to the invention of claim 6, the labyrinth groove is provided on the side having the seal ring groove, and the position where the labyrinth groove is provided may be inside or outside the seal ring,
Also, both may be used. By adding a labyrinth groove,
It is possible to supplementarily oil seal the high and low pressure seals only with the seal ring. During operation, the driven scroll is pressed against the drive scroll by back pressure,
Actually, the thrust sliding surface has a clearance (the clearance is substantially 20 to 50 μm). However, since it is a minute clearance, an oil seal due to the labyrinth effect can be expected sufficiently. In addition, the resistance of the surface increases and the ease with which the oil is spattered by centrifugal force is obstructed, increasing the sealing effect. (6) According to the invention described in claim 7, first, the cross-sectional shape of the seal ring is made into a shape in which oil is unlikely to collect near the thrust seal surface by eliminating conventional corner chamfering. The inner circumference of the ring should be inclined so that the oil that is blown off by centrifugal force flows to the bottom of the ring groove, or the inner wall of the ring groove is chamfered and the seal ring side has that shape. I will attach a protrusion (reverse chamfered shape) in reverse so that it fits. (7) According to the invention as set forth in claim 8, in order to make it easier for the oil to flow into the ring groove, the inner wall and the outer wall of the ring groove are made different in height and the inner wall is made lower, so that the seal is always sealed. The structure is such that oil is easily supplied to the inner peripheral surface of the ring. or,
Even if a slit is partially formed on the inner wall, the same effect is obtained. (8) According to the invention described in claim 9, in addition to the radial tension by the pressure alone, the radial tension by the uniform steady force by the spring force is applied to the seal ring. To this end, a spring ring or a spiral spring having an elastic force in the radial direction may be attached inside the seal ring. This prevents the seal ring from becoming elliptical or partially twisted inward due to the swinging motion to cause side leak.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a rotary scroll compressor according to the present invention will be described below with reference to FIGS. FIG. 1 is a vertical sectional front view showing an essential part of a rotary scroll compressor corresponding to the invention of claim 1, and FIG. 2 is a vertical sectional front view showing an essential part of a rotary scroll compressor corresponding to the invention of claim 2. 3A and 3B show essential parts of a rotary scroll compressor corresponding to the invention of claim 3, where FIG. 3A is a vertical sectional front view, FIG. 3B is a gap-leakage characteristic diagram, and FIG. The main part of the rotary scroll compressor corresponding to invention of Claim 4 is shown, (A) is a longitudinal front view, (B) is the enlarged view of B part of (A), FIG. 5 is Claim 5. Of the rotary scroll compressor corresponding to the invention of FIG. 6, (A) is a plan view, (B) is a partially enlarged vertical front view of (A), and FIG. 6 corresponds to the invention of claim 6. The main parts of the rotary scroll compressor are as follows: (A) is a vertical sectional front view, (B) is (A).
7 is a plan view of the seal portion of FIG. 7, FIG. 7 shows a modification of FIG. 6, (A) is a vertical sectional front view, (B) is a bottom view of (A), and FIG. 8 corresponds to the invention of claim 7. The main parts of the rotary scroll compressor corresponding to the invention according to claim 8 are shown in FIGS. 9A and 9B. (A)
(B) is a vertical sectional front view, FIG. 10 shows a main part of a rotary scroll compressor corresponding to the invention of claim 9, (A) is a vertical sectional front view, and (B) is (A). FIG.

The rotary scroll compressor according to the present invention comprises:
Basically, it is configured as shown in FIG. 11 or FIG. 12, and the scroll portion of the driving scroll 1 and the scroll portion of the driven scroll 2 are disposed so as to be in mesh with each other, and the suction port 3 The discharge gas sucked in by the two scrolls and compressed by the two scrolls is discharged through the discharge hole 5 inside the drive shaft 4 of the drive scroll 1, and faces the end plate of the driven scroll 2 and the end plate. The present invention relates to a rotary scroll compressor having a high / low pressure seal portion between the bearing plate 6 and the bearing plate 6. (1) Embodiment of the invention described in claim 1 FIG. 1 corresponds to the invention described in claim 1, and the drive scroll 1, the driven scroll 2 and the drive shaft 4 are shown in FIG.
It has the same configuration as. The rotary scroll compressor shown in FIG.
A portion of the bearing plate 6A having a high / low pressure seal portion (high / low pressure seal seal ring 7) is divided by a press-fitted cylindrical surface of the bearing, and a wave spring is formed between the divided inner member 6B and the bearing. The washer 6E is interposed so that the inner member 6B can move in the thrust direction. 6C is a stop ring, 6D is a spacer, and 6F is a seal ring outer peripheral end seal portion.

(2) Embodiment of the invention described in claim 2 FIG. 2 corresponds to the invention described in claim 2, and FIG.
The rotary scroll compressor of the bearing plate 6A
Of the bearing is divided by the press-fitting cylindrical surface of the bearing, and the divided inner member 6
G itself is a sealing member, and a corrugated spring washer 6E is interposed between the inner member 6G and the bearing to allow the inner member 6G to move in the thrust direction.

(3) Embodiment of the Invention of Claim 3 FIG. 3 (A) corresponds to the invention of claim 3, and the rotary scroll compressor of FIG. 3 (A) is of the driven scroll type. The gap between the end plate 2A and the bearing plate 6 is set to 5 to 40 μm so that the high pressure portion at the inner peripheral portion of the bearing plate 6 and the low pressure portion at the outer peripheral portion of the driven scroll are sealed. FIG. 3B is a characteristic diagram showing the relationship between the gap between the end plate 2A of the driven scroll and the bearing plate 6 and the leak amount.

(4) Embodiment of the invention described in claim 4 FIG. 4 corresponds to the invention described in claim 4, and FIG.
The rotary scroll compressor of (A) has a driven scroll 2
The lip seal 21 is used as a seal between the outer peripheral portion of the bearing plate 6 and the inner peripheral portion of the bearing plate 6, and as shown in FIG. 4B, the lip seal 21 is fixed to the bottom of the seal groove by a screw 22. I chose

(5) Embodiment of the invention described in claim 5 FIG. 5 corresponds to the invention described in claim 5, and FIG.
In the rotary scroll compressor of FIG. 12, the inner groove 12 and the outer groove 13 are formed in the seal portion of the bearing plate 11 as in FIG.
The double groove is provided so that the outer groove 13 communicates with the high pressure portion. 12a is an inner seal ring, 13a
Is an outer seal ring, 14 is a back surface of the driven scroll, 1
Reference numeral 5 is a communication passage.

(6) Embodiment of the Invention According to Claim 6 FIGS. 6 and 7 correspond to the invention according to claim 6. The rotary scroll compressor shown in FIG. 6 is a bearing plate 6 and a driven scroll. Thrust sliding surface 6G between 2 and
In addition, the labyrinth groove 31 is provided on the surface having the seal ring groove for housing the seal ring 7 for high / low pressure sealing. Further, in the rotary scroll compressor of FIG. 7, the seal ring groove is provided in the bearing plate thrust sliding surface 6G of FIG. 6, whereas the one of FIG. 7 is the back surface 2A of the end plate of the driven scroll. Is the same as the other points. 32 is a labyrinth groove inside the seal ring, and 33 is a labyrinth groove outside the seal ring.

(7) Embodiment of the invention described in claim 7 FIG. 8 corresponds to the invention described in claim 7, and FIG.
The rotary scroll compressor of the bearing plate 41
The cross-sectional shapes of the seal rings 42A to 42C provided in the respective high and low pressure seal portions of A to 41C are 42A and 4A.
2B is inclined so that the inner sliding surface is thicker and the spring washer side is thinner, while the 42C one is reverse chamfered only on the inner sliding surface. Has been. That is,
For 42A, the inner diameter of the seal ring is inclined, and for 42B, the inner diameter of the seal ring and the inner wall of the ring groove are inclined. In the case of 42C, the inner wall of the ring groove is chamfered and the protrusion of the corner portion of the seal ring is inclined (reverse chamfer).

(8) Embodiment of the invention described in claim 8 FIG. 9 corresponds to the invention described in claim 8, and FIG.
The rotary scroll compressor of the bearing plate 41
As shown in FIG. 9 (A), the groove shape in which the high and low pressure seal seal rings 42D and 42E provided in the high and low pressure seal portions of D and 41E are accommodated is lower on the inner wall of the groove than on the outer wall of the groove. Or, as shown in FIG. 9B, a slit 43 is provided in a part of the inner wall of the groove. That is, as shown in FIG. 9 (A), if the inner wall of the groove is made lower than the outer wall, the flow of oil becomes smooth, and in the case of FIG. 9 (B), oil easily flows into the bottom of the seal ring. .

(9) Embodiment of the Invention According to Claim 9 FIG. 10 corresponds to the invention according to claim 9. The rotary scroll compressor of FIG. 10 has a high pressure plate and a low pressure seal part of a bearing plate 41F. Seal ring 42 provided
A spring ring 43 or a spiral spring having elasticity in the radial direction is provided between the inner peripheral surface of F and the inner wall of the groove. Since the spring ring 43 constantly and uniformly presses the seal ring 42F in the radial centrifugal direction, the seal ring becomes elliptical or distorted, and side leak hardly occurs.

[0016]

Since the rotary scroll compressor according to the present invention is constructed as described above, it has the following effects. According to the first and second aspects of the present invention, the bearing plate is divided into two parts, and the side seal is incomplete due to the seal ring having insufficient machining accuracy and the material of the seal ring. In addition, the sealing effect can be enhanced by completely forming the end seal on the outer peripheral portion of the side seal. Further, if the side seal of the thin seal ring which is originally expected is given up and the movable member itself is used as the seal member, the sealing effect can be further enhanced. According to the third and fourth aspects of the present invention, it is possible to provide a seal of a fitting type that is inexpensive and has good characteristics when operating with a commercial power source at 60 HZ or less, and reliability that is a drawback of the lip seal. It is possible to improve the property. According to the fifth aspect of the present invention, by providing the outer groove with the communication passage that communicates with the high pressure, a high pressure is applied to the back surface of the outer seal ring, the pressing force of the seal is increased, and the sealing performance is improved. According to the invention described in claim 6, by providing a labyrinth groove on the sliding surface (sealing surface) between the bearing plate and the driven scroll, the labyrinth effect is added to the high and low pressure seal to enhance the sealing effect and improve the performance. Will be possible. According to the inventions of claims 7 to 9, the oil leakage caused by the wedge effect due to the centrifugal force of the oil acting on the thrust surface of the seal ring is suppressed to a minimum, and the outer circumference of the ring caused by the relative swing motion. Leaks from the side are minimized.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view showing a main part of a rotary scroll compressor according to a first aspect of the invention.

FIG. 2 is a vertical sectional front view showing a main part of a rotary scroll compressor corresponding to the invention according to claim 2.

FIG. 3 shows a main part of a rotary scroll compressor corresponding to the invention of claim 3, (A) is a vertical sectional front view,
(B) is a gap-leakage amount characteristic diagram.

FIG. 4 shows a main part of a rotary scroll compressor corresponding to the invention of claim 4, (A) is a vertical sectional front view,
(B) is an enlarged view of a B portion of (A).

5A and 5B show essential parts of a rotary scroll compressor according to the invention of claim 5, wherein FIG. 5A is a plan view, and FIG.
FIG. 7A is a partially enlarged vertical front view of (A).

FIG. 6 shows a main part of a rotary scroll compressor corresponding to the invention of claim 6, (A) is a vertical sectional front view,
(B) is a plan view of the seal portion of (A).

FIG. 7 shows a modified example of FIG. 6, (A) is a vertical sectional front view, and (B) is a bottom view of (A).

FIG. 8 shows essential parts of a rotary scroll compressor corresponding to the invention of claim 7, and (A), (B), and (C) are vertical sectional front views.

FIG. 9 shows a main part of a rotary scroll compressor corresponding to the invention of claim 8, and (A) and (B) are vertical front views of the respective parts.

FIG. 10 shows a main part of a rotary scroll compressor corresponding to the invention of claim 9, (A) is a vertical sectional front view,
(B) is a plan view of (A).

FIG. 11 shows essential parts of a conventional rotary scroll compressor, in which (A) is a vertical sectional front view and (B) is an enlarged vertical sectional front view of a high-low pressure seal portion included in (A).

FIG. 12 shows an example of the structure of a high / low pressure seal portion of a conventional rotary scroll compressor, (A) is a plan view, and (B) is a plan view.
FIG. 7A is a partially enlarged vertical front view of (A).

[Explanation of symbols]

 1: Drive scroll 2: Driven scroll 3: Suction port 4: Drive shaft 5: Discharge hole 6: Bearing plate 7: Seal ring for high / low pressure seal 8: Wave spring washer 9: Oldham ring

Claims (9)

[Claims] 1. A scroll portion of a drive scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the drive scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In, the portion of the bearing plate having the high / low pressure seal portion is divided by the press-fitting cylindrical surface of the bearing, and a corrugated spring washer is interposed between the divided inner member and the bearing, A rotary scroll compressor characterized in that the members can move in the thrust direction. 2. A scroll portion of a driving scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In the above, the portion of the bearing plate having the high / low pressure seal portion is divided by the press-fitting cylindrical surface of the bearing, and the divided inner member itself is the seal member, and the inner member and the bearing are A corrugated spring washer is interposed therebetween to allow the inner member to move in the thrust direction. Rotary scroll compressor. 3. A scroll portion of the driving scroll and a scroll portion of the driven scroll are arranged so as to face each other so as to mesh with each other, and the discharge gas sucked from the suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In the above, the gap between the end plate of the driven scroll and the bearing plate is set to 5 to 40 μ to seal between the high pressure portion of the inner peripheral portion of the bearing plate and the low pressure portion of the outer peripheral portion of the driven scroll. The rotary scroll compressor is characterized by 4. The scroll portion of the driving scroll and the scroll portion of the driven scroll are arranged so as to face each other so as to mesh with each other, and the discharge gas sucked from the suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In the rotary scroll, the lip seal is used as a seal between the outer peripheral portion of the driven scroll and the inner peripheral portion of the bearing plate, and the lip seal is fixed to the bottom portion of the seal groove. Compressor. 5. A scroll portion of a driving scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. 2. The rotary scroll compressor according to claim 1, wherein a double groove is provided in the seal portion of the bearing plate, and the outer groove is communicated with the high pressure portion. 6. A scroll portion of a driving scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. 2. The rotary scroll compressor according to claim 1, wherein a thrust sliding surface between the bearing plate and the driven scroll is provided with a labyrinth groove on a surface having a seal ring groove. 7. A scroll portion of a driving scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In the above, the cross-sectional shape of the seal ring provided in the high-low pressure seal portion is inclined such that the inner peripheral sliding surface is thicker and the spring washer side is thinner, or the inner peripheral side A rotary scroll compressor characterized in that a reverse chamfer is attached only to the sliding surface. 8. A scroll portion of a driving scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In the groove shape in which the seal ring provided in the high and low pressure seal portion is housed, is the inner wall of the groove lower than the outer wall of the groove?
Alternatively, the rotary scroll compressor is characterized in that a slit is provided in a part of the inner wall of the groove. 9. A scroll portion of a driving scroll and a scroll portion of a driven scroll are arranged so as to face each other so as to mesh with each other, and discharge gas sucked from a suction port and compressed by the two scrolls drives the driving scroll. The rotary scroll compressor is adapted to be discharged through a discharge hole inside the shaft, and has a high / low pressure seal portion between the end plate of the driven scroll and a bearing plate provided facing the end plate. In the rotary scroll compressor, a spring ring or a spiral spring having elasticity in a radial direction is provided between an inner peripheral surface of a seal ring provided in the high and low pressure seal portion and an inner wall of the groove. .