JPH11107941A - Scroll type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll type compressor improving compression efficiency by performing a sufficient gas seal of a slide surface in a movable eccentric part. SOLUTION: In a movable eccentric scroll type compressor, relating to a fixed scroll 45, a fluctuation scroll 42 rotated around by driving an electric motor element 32 to be formed with a boss hole part successively connecting a movable eccentric part of a rotary shaft of the electric motor element 32 in a back surface is mutually meshed with each other, sucked refrigerant gas is compressed, to be delivered in a closed vessel 31, thereafter to be delivered to outside thereof. Here, in a specific position of a slide surface in the movable eccentric part comprising a pin part provided eccentrically from an axial center in an end part of the rotary shaft 36 and a swing ring 54 arranged to be inserted in this pin part, a seal material is interposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor mounted on, for example, an air conditioner / refrigerator, and more particularly, to a compressed gas compressed by meshing a fixed scroll and an orbiting scroll. The present invention relates to a scroll-type compressor that discharges into a closed container and then discharges out of the closed container.

[0002]

2. Description of the Related Art A scroll type compressor 1A used in a refrigeration cycle of an air conditioner or the like has a structure shown in FIG. 4, for example. An electric element 2 and a scroll compression element 3 are provided inside a cylindrical closed container 1 having both ends closed.
And built-in. The electric element 2 is a closed container 1
A stator 4 fixed to the inner wall surface side of the
And a rotor 5 rotatably supported inside. A rotor shaft 6 is coupled to the rotor 5 in a penetrating state.
One end of the rotating shaft 6 is rotatably supported by a bearing portion 7A of a support frame 7 which constitutes a part of the scroll compression element 3. The other end of the rotating shaft 6 protrudes from the rotor 5, and an oil supply unit 8 is connected to the tip. An oil introduction pipe 9 is connected to an end of the oil supply section 8. The end on the suction side of the oil introduction pipe 9 is extended downward so as to be immersed in the lubricating oil b contained in the closed container 1. An oil passage 10 is formed in the rotating shaft 6 in the axial direction by sucking and supplying the lubricating oil b from the oil supply unit 8, and the lubricating oil passes through the oil passage 10 and a bearing 7 </ b> A of the support frame 7. After being supplied to each of the sliding portions, it is recirculated.

[0003] One end of the rotary shaft 6 supported so as to penetrate the support frame 7 has a pin portion (crank portion) whose center is provided eccentrically with the axis of the rotary shaft 6.
The orbiting scroll 12 is connected to the pin portion 11. This oscillating scroll 1
2 is formed in a disk shape, and a boss hole portion 13 to which the pin portion 11 is connected is formed in the center of one side surface. A spiral wrap 14 is integrally formed on the other side surface of the orbiting scroll 12. A fixed scroll 15 is connected to the support frame 7. A spiral wrap 16 is formed on the fixed scroll 15 at a portion facing the orbiting scroll 12, and a plurality of compression chambers 17 are formed between the fixed scroll 15 and the wrap 14. Refrigerant gas introduced from the outside of the closed vessel 1 to the outer peripheral portion of the scroll compression element 3 via the suction pipe 18 is compressed in the compression chamber 17 and gradually moves to the center to reduce the volume. The lubricant is discharged from the discharge port 19 provided at the center of the other side surface of the fixed scroll 15 into the hermetically sealed container 1, and the entrained lubricating oil is separated in this space to reduce pulsation.

[0004] The compressed gas discharged from the discharge port 19 into the closed container 1 is supplied to the fixed scroll 1 as shown by a white arrow.
5 and a passage (not shown) provided in the support frame 7,
The lubricating oil in the refrigerant gas is further separated by the centrifugal force or the like generated by the rotation of the rotor 5 by going to the electric element 2 side, and the refrigerant gas from which the lubricating oil has been separated is discharged from the discharge pipe 20 to the outside of the closed casing 1. The separated lubricating oil flows as shown by the black arrows, accumulates at the bottom of the closed container 1, and is circulated for use.

FIG. 5 is an enlarged view of an end portion of the rotating shaft 6.
(A) is a plane explanatory view of the end of the rotating shaft 6, (b)
FIG. 3 is an explanatory cross-sectional view of an end of the rotating shaft 6. In the case of a movable eccentric scroll compressor, the end of the rotating shaft 6 is a pin 1
1 and a movable eccentric portion 22 composed of a swing link 21 inserted into the pin portion 11 and disposed. The end portion having such a configuration can perform gas sealing on the sliding surface between the outer surface of the swing link 21 and the inner surface of the boss hole portion 13. Since the gap between the sliding surfaces is so large that gas sealing cannot be performed, there is a problem that gas leakage occurs and the compression efficiency is reduced.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a movable eccentric scroll compressor which suppresses gas leakage from the gap of the movable eccentric portion, performs sufficient gas sealing, and improves compression efficiency. To provide.

[0007]

The inventors of the present invention have conducted intensive studies on such a problem, and as a result, have found that a pin provided eccentrically with respect to the axis at the end of the rotating shaft and a swing inserted and disposed in the pin. The problem can be solved by interposing a sealing material at a specific position on the sliding surface of the movable eccentric portion composed of a link, or by providing a lubricating oil throttle at the outlet of a lubricating oil passage provided through the rotating shaft. They have found that they can be solved and have made the present invention.

That is, the invention according to claim 1 of the present invention comprises an electric element and a scroll compression element driven by the electric element in a closed container, wherein the scroll compression element has a spiral wrap on the back surface. And a spiral wrap that revolves around the fixed scroll by driving the electric element. The movable eccentric part of the rotation axis is eccentric to the center of the rotation axis of the electric element at the center of the back surface. The oscillating scroll having the connected boss hole is meshed with each other to compress the refrigerant gas sucked from outside the sealed container and discharge it into the sealed container, and then discharge the refrigerant gas to the outside of the sealed container. In the scroll type compressor, the movable eccentric portion is formed of a pin portion provided eccentrically with respect to an axis at an end of the rotary shaft and a swing link inserted and disposed in the pin portion. Ri, and a scroll compressor which is characterized in that the sealing member is interposed between the swing link receiving portion of the rotating shaft and the insertion end of the swing link.

According to a second aspect of the present invention, in the scroll type compressor according to the first aspect, the seal material is impregnated with a metal thrust plate, a metal thrust plate and Teflon packing, or a Teflon and lead. It is a metal thrust plate having a bronze powder porous sintered layer on one side or both sides.

According to a third aspect of the present invention, there is provided a fixed scroll having a motor-driven element and a scroll compression element driven by the motor-driven element in a closed container, wherein the scroll compression element has a spiral wrap on a back surface; The fixed scroll has a spiral wrap that revolves when driven by the electric element, and is eccentric to the axis of the rotation axis of the electric element at the center of the back surface, and the movable eccentric part of the rotation axis is connected. The oscillating scroll having the boss hole formed therein meshes with each other, compresses the refrigerant gas sucked from outside the closed container, discharges the refrigerant gas into the closed container, and discharges the refrigerant gas outside the closed container. A scroll type compressor, wherein the movable eccentric portion includes a pin portion provided eccentrically with respect to an axis at an end of the rotating shaft, and a swing link inserted and disposed in the pin portion. A lubricating oil throttle having a small through hole is provided at the orbiting scroll side outlet of a lubricating oil passage penetrating through the rotary shaft, and the lubricating oil throttle is provided by the lubricating oil coming from the lubricating oil throttle. Wherein the through hole is gas-sealed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described in detail with reference to the drawings shown in FIGS. FIG.
FIG. 2 is a cross-sectional view showing the overall configuration of an embodiment of the scroll compressor of the present invention. FIG. 2A is a cross-sectional view of the end of the rotating shaft of the scroll compressor of the present invention shown in FIG. It is an explanatory view, and (b) is an explanatory view showing composition of a swing link, a seal material, a pin part, etc. FIG. 3 is an explanatory cross-sectional view of an end of a rotating shaft of another scroll compressor according to the present invention.

The compressor shown in FIG. 1 is a movable eccentric scroll compressor 1B, and has a closed container 31 formed in a cylindrical shape with both ends closed. An electric element 32 and a scroll compression element 33 driven by the electric element 32 are accommodated in the closed container 31.

The electric element 32 has a stator 34 fixed inside the closed container 31 and a rotor 35 located at the center of the stator 34.
A rotary shaft 36 oriented in the axial direction of the closed container 31 is penetratingly coupled to the center of the closed container 31. One end of the rotary shaft 36 is supported by the support frame 3 for supporting the scroll compression element 33.
7 is rotatably supported through the center portion. Here, the support frame 37 is fixedly connected to the inner wall surface of the closed container 31. The rotating shaft 36 is rotatably supported at one end by a bearing portion 37A of the support frame 37. The rotor 35 is connected to the inner wall surface of the sealed container 31 via the rotating shaft 36 and the support frame 37. Supported on the side.

Further, a pin portion (crank portion) 41 whose center is eccentrically provided with respect to the axis of the rotating shaft 36 is formed at the end of the rotating shaft 36 penetrating the support frame 37. As shown in FIG. 2, the insertion end 55 of the swing link 54 of the movable eccentric part 66 and the swing link receiving part of the rotating shaft 36, which are composed of the pin 41 and the swing link 54 inserted and disposed on the outer periphery thereof. A sealing material 59 is interposed between the sealing material 59 and the sealing material 59. The orbiting scroll 42 is connected to the movable eccentric portion 66 of the rotating shaft 36. The orbiting scroll 42 has a boss hole 43 which is connected to the center of one side of the disk-shaped end plate by inserting the movable eccentric portion 66 and a spiral wrap 44 formed on the other side of the end plate. I have. The fixed scroll 4 is provided on the support frame 37.
5 are connected. The fixed scroll 45 is provided with a spiral wrap 46 which is alternately positioned on the wrap 44 of the orbiting scroll 42 and forms a plurality of compression chambers 47.

On the side wall surface of the fixed scroll 45, a refrigerant gas suction pipe 4 penetrated by the closed container 31 is provided.
8 are connected. At the center of the fixed scroll 45, a discharge port 49 for discharging the compressed refrigerant gas into the closed container 31 is provided. Then, the scroll compression element 3 of the refrigerant gas sucked from the suction pipe 48 is formed.
3, the back side of the orbiting scroll 42 (the surface of the end plate with the boss hole 43) and the support frame 3
7 are communicated with each other at the peripheral edge of the end plate of the orbiting scroll 42, so that the pressure during this period is almost the same as the refrigerant gas suction side and lower than the pressure in the closed vessel 31.

The other end of the rotating shaft 36 is provided with a differential pressure type
8 are provided. The oil supply section 38 is provided in the closed container 31.
A sub-support frame 52 having a sub-bearing portion 51 mounted inside and supporting one end of the rotating shaft 36 and having an oil introduction pipe 39 mounted thereon is provided. A bearing 53 is interposed between the auxiliary support frame 52 and the rotating shaft 36.

An oil passage 40 is formed in the rotary shaft 36 from one end to the other end. The portion of the rotary shaft 36 supported by the bearing 37A is closer to the electric element side. A small hole 56 communicating from the oil passage 40 to the sliding surface of the bearing 37A is provided. A helical groove 57 is formed on the surface of the rotating shaft 36 starting from the outlet of the small hole 56 and communicating with the small hole 56 toward the pin portion 41. A portion where the rotating shaft 36 is supported by the bearing 37A. Up to the middle. The lubricating oil that has passed through the small hole 56 flows through the groove 57 to lubricate the sliding surface and gas seals the sliding surface on the pin 41 side from the small hole 56.

The hermetically sealed container 31 contains lubricating oil b to a predetermined level. The lubricating oil b is sucked up from the oil introduction pipe 39 of the oil supply section 38 by the above-mentioned differential pressure, and And is sent to each sliding portion including the bearing portion 37A through an oil passage 40 provided in the above, and is circulated and used.

In this example, a metal (steel plate) thrust plate having excellent wear resistance is used as a seal material 59 interposed between the insertion end portion 55 of the swing link 54 and the swing link receiving portion 58 of the rotating shaft 36. The seal member 59 is composed of the metal (steel plate) thrust plate 60 alone. Further, a metal thrust plate having a porous sintered layer made of bronze powder impregnated with Teflon and lead on one surface or both surfaces can be preferably used as the sealing material 59. These sealing materials 5
9, the outer circumference is almost the same as the outer circumference of the swing link 54,
It is preferable that the inner circumference is substantially the same as the outer circumference of the pin portion 41. Since such a sealing material 59 is interposed, the swing link receiving portion 58 and the insertion end 55 of the swing link 54 are inserted.
The gas seal between and becomes very good,
The lubricating oil flowing into the boss hole 43 via the lubricating oil passage 40 is
Since the lubrication and gas sealing of the sliding surface between the outer surface of the swing link 54 and the inner surface of the boss hole 43 are performed, the entire gas seal is improved, and the compression efficiency is improved. Black arrows in FIG. 2 indicate the flow of the lubricating oil.

The oscillating scroll 4 of the lubricating oil passage 40 of the pin portion 41 of another scroll type compressor of the present invention shown in FIG.
A member 64 provided with a small through hole 63 is provided at the outlet 62 on the second side.
Is tightly press-fitted. The orbiting scroll 42 is connected to the movable eccentric portion 66 of the rotating shaft 36. In such a configuration, the small through hole 63 of the lubricating oil throttle section 65 is gas-sealed. By doing this,
The lubricating oil that has flowed into the boss hole portion 43 through the lubricating oil throttle portion 65 improves the entire gas seal without gas sealing the gap between the outer surface of the pin portion 41 and the inner surface of the swing link 54. The compression efficiency is improved. Black arrows in FIG. 3 indicate the flow of the lubricating oil.

When the operation of the scroll type compressor 1B of the present invention constructed as described above is started, the refrigerant gas is supplied to the suction pipe 4B.
8 to the outer peripheral portion of the scroll compression element 33,
It is compressed by gradually moving to the center, and the closed container 3 is discharged from a discharge port 49 provided at the center of the fixed scroll 45.
1 and the lubricating oil entrained in this space is separated, and pulsation is reduced. The discharged gas flows through a passage (not shown) provided in the fixed scroll 45 and the support frame 37 as shown by a white arrow, goes to the electric element 32 side, and receives the centrifugal force due to the rotation of the rotor 35 and the stator 34 and the auxiliary support frame 52. The lubricating oil in the refrigerant gas is further separated by a baffle plate effect or the like, and the refrigerant gas from which the lubricating oil has been separated is discharged from the discharge pipe 50 to the outside of the closed vessel 31. The separated lubricating oil flows as indicated by the black arrow, accumulates at the bottom of the closed vessel 31, and is circulated for use.

In the above description of the scroll type compressor of the present invention, the horizontal type scroll type compressor has been described. However, the scroll type compressor of the present invention is not limited to the horizontal type, but may be a vertical type. It may be a stationary scroll compressor or another type of scroll compressor.

[0023]

According to the scroll compressor of the present invention, since sufficient gas sealing of the movable eccentric portion is performed, the compression efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of an embodiment of a scroll compressor according to the present invention.

2 (a) is a cross-sectional explanatory view of an end of a rotating shaft of the scroll compressor of the present invention shown in FIG. 1, and FIG. 2 (b) shows a configuration of a swing link, a seal material, a pin portion, and the like. FIG.

FIG. 3 is an explanatory sectional view of an end portion of a rotating shaft of another scroll type compressor of the present invention.

FIG. 4 is a cross-sectional view showing the overall configuration of a conventional horizontal scroll compressor.

FIG. 5 is an explanatory cross-sectional view of an end of a rotating shaft of the conventional scroll compressor shown in FIG.

[Explanation of symbols]

 b Lubricating oil 1A, 1B Scroll compressor 31 Airtight container 32 Electric element 33 Scroll compression element 34 Stator 35 Rotor 36 Rotating shaft 37 Support frame 37A Bearing part 38 Oil supply part 39 Oil introduction pipe 40 Oil passage 41 Pin part 42 Oscillating scroll 43 Boss hole portion 44, 46 Wrap 45 Fixed scroll 47 Compression chamber 48 Suction tube 49 Discharge port 50 Discharge tube 51 Secondary bearing portion 52 Secondary support frame 53 Bearing 54 Swing link 55 Insertion end 56 Small hole 57 Groove 58 Swing link receiving portion 59 Sealing material 60 Thrust plate 61 Teflon sheet packing 62 Oscillating scroll side outlet 63 Small through hole 64 Member 65 Lubricating oil restrictor 66 Movable eccentric part

 ──────────────────────────────────────────────────の Continuing on the front page (72) Kazuya Sato, 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kenzo Matsumoto 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5-5 Sanyo Electric Co., Ltd. (72) Inventor Takehiro Nishikawa 2-5-5 Sanyo Electric Co., Ltd. (72) Inventor Takashi Sato Keihanhondori, Moriguchi-shi, Osaka 2-5-5 Sanyo Electric Co., Ltd.

Claims (3)

[Claims] An electric element and a scroll compression element driven by the electric element are provided in a closed container, wherein the scroll compression element has a fixed scroll having a spiral wrap on a back surface, and the electric scroll is provided for the fixed scroll. It has a spiral wrap that revolves by driving the element, and a boss hole is formed in the center of the back surface, which is eccentric with the axis of the rotation axis of the electric element and is connected to the movable eccentric part of the rotation axis. A scroll compressor that meshes with the orbiting scroll and compresses the refrigerant gas sucked from outside the closed container and discharges the refrigerant gas into the closed container, and then discharges the refrigerant gas outside the closed container, The movable eccentric portion includes a pin portion provided eccentrically with respect to an axis at an end portion of the rotary shaft, and a swing link inserted and disposed in the pin portion. A scroll compressor comprising a seal member interposed between an end portion and a swing link receiving portion of the rotary shaft. 2. A metal thrust plate having a metal thrust plate, a metal thrust plate and a Teflon packing, or a porous sintered layer made of bronze powder impregnated with Teflon and lead on one surface or both surfaces. The scroll compressor according to claim 1, wherein: 3. A closed scroll having an electric element and a scroll compression element driven by the electric element in the closed container, wherein the scroll compression element has a spiral scroll on its back surface and the electric scroll with respect to the fixed scroll. It has a spiral wrap that revolves by driving the element, and a boss hole is formed in the center of the back surface, which is eccentric with the axis of the rotation axis of the electric element and is connected to the movable eccentric part of the rotation axis. A scroll compressor that meshes with the orbiting scroll and compresses the refrigerant gas sucked from outside the closed container and discharges the refrigerant gas into the closed container, and then discharges the refrigerant gas outside the closed container, The movable eccentric portion includes a pin portion provided eccentrically with respect to the axis at an end of the rotating shaft, and a swing link inserted and disposed in the pin portion, and is provided so as to penetrate through the rotating shaft. Providing a lubricating oil throttle having a small through hole at the orbiting scroll side exit of the girder lubricating oil passage,
A scroll type compressor, wherein a lubricating oil from the lubricating oil throttle portion gas seals a through hole of the lubricating oil throttle portion.