KR940008170B1 - Scroll type compressor - Google Patents

Abstract

No content.

Description

Scroll Fluid Machine

1 is a schematic longitudinal sectional view of a scroll compressor according to an embodiment of the present invention.

2 is a cross-sectional view taken along the line II-II of FIG.

3 is a cross-sectional view similar to FIG. 1 of a scroll compressor according to another embodiment.

* Explanation of symbols for main parts of the drawings

10 scroll compressor 12 induction motor

14 compression mechanism 16: container

18: drive shaft 20: stator

22: rotor 24: extension

30: fixed scroll member 32, 42: hard plate

34, 44: scroll wrap 36, 46: boss

38, 48: through hole 50: working chamber

52 suction port 54 discharge port

56: space 58: passage

62: frame member 64: swing ring

65 support member 68 counter weight

70: pump 72: impeller

74: oiling hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to scroll fluid machines that can be used as suction pumps, blowers, or compressors for compressible fluids. It is about.

Conventionally, a scroll fluid machine having a pair of scroll members interacting with each other has been put into practical use and can be used for various applications.

In general, each scroll member has a flat hard plate and a scroll wrap projecting from one surface of the hard plate and spirally disposed on the surface. This pair of scroll members are arranged in a state where one scroll wrap is sandwiched in a spiral groove formed in the other scroll wrap.

The leading edge of each scroll wrap is sealed in contact with the scroll member hardplate on the other side. The relative movement of a pair of scroll members while engaging these scroll wraps in an arc of each other changes the volume of the crescent-operated chamber formed between these scroll wraps.

That is, the working chamber decreases in volume as it moves in the direction of the center portion at the circumference of the scroll member, and increases as it moves in the direction of the circumference at the center portion.

This compresses or expands the compressive fluid in the working chamber. Such scroll fluid machines have advantages such as small fluctuations in drive torque and low fluid leakage in the working chamber.

Japanese patent application (Japanese Patent Laid-Open No. 57-131896) published on August 14, 1982 discloses a scroll compressor for compressing a refrigerant of an air conditioning apparatus or a refrigeration apparatus. A pair of scroll members of this scroll compressor are housed compactly in a hermetically sealed container together with the drive motor disposed thereon.

One of the pair of scroll members is fixed with respect to the hermetic container, and the other scroll member is disposed above this, i.e., the drive motor, and can move relative to the fixed scroll member.

At the lower end of the drive motor, the crankshaft driven by this drive motor extends. The crankshaft is supported by a frame partitioned inside the vessel into the drive motor side chamber and the compressor side chamber, and has a lower end portion rotatably supported by a crank pin and a fixed scroll member that allow the movable scroll member to rotate freely with respect to the movable scroll.

The outer periphery of the fixed scroll member is formed with an intake port for absorbing refrigerant gas, which is opened in a spiral groove outer periphery formed by a scroll wrap.

The movable scroll member on which the crankshaft is rotated by the drive motor is pivoted together with the crank pin without rotating. The refrigerant gas sucked in the inlet is compressed with a decrease in the volume of the working chamber formed between the movable scroll member and the fixed scroll member, leading to the spiral groove center in the most compressed state.

The compressed refrigerant gas is discharged from the upper portion of the vessel through a discharge air flow pipe formed inside the fixed scroll member. The discharge air flow pipe is formed in an approximately central portion of the fixed scroll member hard plate and communicates with the working chamber in a axial direction, and one end thereof extends in the semi-radial direction in a semi-diameter direction through the axial hole, It has an additional axial hole extending in the axial direction through the other end of the semi-diameter hole in the axial direction.

Therefore, in this conventional scroll compressor, three steps of mechanical pores are required to form such a complicated discharge air flow pipe in the fixed scroll member. This increases the manufacturing cost.

In addition, there is a problem in that it is necessary to increase the thickness of the fixed scroll member hard plate because a semi-diameter hole is required. Further, in order to discharge the compressed refrigerant gas from the upper portion of the container, it is necessary to allow the discharge air flow pipe of the fixed scroll member to be connected to the discharge air flow pipe formed in a frame.

The frame arranged with the movable scroll member sandwiched between the fixed scroll member and the fixed scroll member cannot form a sufficient sealing area between the frame and the fixed scroll member to seal both the discharged air flow pipes. For this reason, there exists a possibility that the high pressure refrigerant gas will leak from the frame and the fixed scroll member toward the suction port.

This invention is made | formed in view of the point mentioned above.

It is an object of the present invention to provide a scroll fluid machine having a simple structure and a light weight, low manufacturing cost, and no leakage of compressed gas.

According to the present invention, there is a power source and a pair of scroll members, which are relative to each other, each of which moves relative to the inner and outer circumferential regions, and these scroll members comprise a plurality of crescent-shaped working chambers between these scroll members. And the volume of these working chambers changed between the inner circumferential region and the outer circumferential region when formed relative to the above-described power source: sealing the power source and the pair of scroll members, and also between the power source and the pair of scroll members. A container defining an inner space therein; first communication means formed in the other outer circumferential region of the pair of scroll members as described above and capable of communicating the above-described operating chamber to the outer circumference of the container; The inner periphery of one side extends in the axial direction so as to communicate with the above-mentioned operating chamber and space. A fluid machine is provided having a second communication means.

According to this fluid machine, the power source and the pair of scroll members are sealed in the container and are formed in a compact structure as a whole.

The actuating chamber formed between the pair of scroll members is successively passed through the outside of the container by the first communicating means so that fluid can be supplied from the outside through the first communicating means. In addition, either of the pair of scroll members communicates with the space in the container by the second communication means extending axially in one of the inner circumferential regions, so that the structure of the pair of scroll members becomes very simple.

Moreover, since the 1st communication means and the 2nd communication means are arrange | positioned by semi-diameter isolation, the leakage of a fluid is prevented.

1, there is shown a scroll fluid machine in the form of a scroll compressor 10 in accordance with an embodiment of the present invention. This compressor 10 is used for the compression of refrigerant gas in a refrigerator or an air conditioning apparatus. The scroll compressor 10 includes an induction motor 12 and a compression mechanism 14 arranged below the motor 12 and driven by the motor 12. The induction motor 12 and the compression mechanism 14 are sealed in the container 16.

The motor 12 has the stator 20 fixed to the container 16, and the rotor 22 rotatably arrange | positioned inside this, The drive shaft 18 for driving the compression mechanism 14 is this rotor. It penetrates 22 and is fixed to this rotor. This drive shaft 18 has an extension part 24 extending downward from the motor 12, and this extension part 24 is formed as a crankshaft for driving the compression mechanism 14 mentioned later.

The motor 12 is supplied with energy from an external power source through the terminal box 21. The compression mechanism 14 includes a fixed scroll member 30 and a movable scroll member 40. The process scroll member 30 has a circumferential plate 32 which is fixed to the container 16 with a bolt (not shown), for example, and a scroll wrap 34 that hangs from the bottom surface of the plate.

The boss portion 36 protrudes upward from the surface opposite to the upper surface of the hard plate 32, that is, the scroll wrap 34. The boss portion 36 has a through hole 38 through which the crankshaft 24 freely rotates. Therefore, the inner surface of the through hole 38 acts as a bearing surface for supporting the crankshaft 24 freely.

The movable scroll member 40 has a hard plate 42, a scroll wrap 44 erected on the upper surface of the hard plate 42, and a boss portion 46 erected at the center. This maintenance part 46 has a through hole 48 for freely receiving the crank pin 26 of the crankshaft 24, and the inner surface of the through hole 48 serves as the bearing surface of the crank pin 26. As shown in FIG. Works.

As shown in FIG. 2, the scroll wraps 34 and 44 each form a spiral groove.

The scroll wrap 34 of the fixed scroll member 30 is accommodated in a spiral groove formed in the scroll wrap 44 of the movable scroll member 40, and the tip thereof slides in an airtight state with respect to the upper surface of the hard plate 42. It works together to be able to move.

Similarly, the scroll wrap 44 of the movable scroll member 40 is accommodated in a spiral groove formed by the scroll wrap 34 of the fixed scroll member 30, the tip of which slides in an airtight state with respect to the upper surface of the hard plate 32. It is attached so that it is movable.

These scroll wraps 34 and 44 are formed such that, for example, surfaces facing each other are engaged in an arc shape by an involute curve. A plurality of working chambers 50 are formed between the scroll wraps 34 and 44 and the substrates 32 and 42.

Further, the groove formed by the scroll wrap 34 of the fixed scroll member 30 is connected to the inlet port 52 through which the refrigerant gas and the like are supplied from the outer circumference portion, and also to the four discharge ports 54 on the inner circumference side. . These discharge ports 54 are formed along the axial direction in the water retaining portion 36 of the fixed scroll member 30 as shown in FIG. 1 in this embodiment, and between the fixed scroll member 30 and the motor 12. It passes through the outlet line 60 via the passage 56 penetrating the inside of the stator 20 of the space 12, the motor 12, and the upper space 59 of the container 12 arranged in the space 56.

As is apparent, this discharge port 54 is formed by only the fixed scroll member 30, the hard plate 32 or the hard plate 32, and the through hole penetrating the repair part 36 in the axial direction. The hard plate 32 of the fixed scroll member 30 does not need to be formed thicker than necessary to obtain the required strength.

Therefore, the compression mechanism 14 can be manufactured with a very simple structure and at low cost.

Referring again to FIG. 1, the movable scroll member 40 is held through the pivot ring 64 relative to the container 16 to prevent the rotating of the movable scroll member 40. This pivot ring 64 rests on a support member 65 provided so as not to move relative to the frame member 62 fixed to the container 16.

The ring 64 has protrusions or grooves that are perpendicular to each other on the upper and lower surfaces thereof, and the protrusions or grooves are free to slide and move with the grooves or protrusions formed on the lower surface of the movable scroll member 40 and the upper surface of the support member 65. To interlock. Thus, these rings 64, movable scroll member 40 and support member 65 act like Ouldhams couplings.

The frame member 62 has a central boss portion 63 having a through hole 63a. In addition, on the frame 62, a high-pressure bearing ring 66 to which a thrust portion acting on the movable scroll member 40 receives a load is provided.

The inner surface of the through hole 63a rotatably supports the diameter reduction end 28 provided at the tip or bottom of the crankshaft 24. In addition, a counterweight 68 is attached to the diameter reduction end 28. The diameter reduction end 28 has a pump 70 for supplying to a place requiring lubricating oil.

The pump 70 is formed of an impeller 72 disposed in the inner hole of the end 28, and the lubricant oil disposed under the container 16 when the drive shaft 18 and the crankshaft 24 are rotated. Lubricating oil is sucked and pressurized in the tank 17. The pressurized lubricating oil is supplied to the lubrication place required by the lubrication hole 74. In addition, the inner hole 76 extending axially in the crankshaft 24 and the drive shaft 18 and opening at the upper end is for balancing the pressure of the lubricating oil with the pressure of the gas in the container 16.

The operation of the scroll compressor 10 of the present embodiment is as follows.

When energy is supplied to the motor 12 from the outside through the terminal box 21, the crank shaft 24 coupled to the drive shaft 18 of the motor 12 is rotated. As a result, the compression mechanism 14 is driven. The fixed scroll member 30 is fixed to the container 16 and does not rotate. The movable scroll member 40 is rotated about the axis of the drive shaft 18 by the crank pin 26.

At this time, the movable scroll member 40 is prevented from rotating about the axis of the crank pin 26 by the turning ring 64.

The volume of the working chamber 50 formed between the fixed scroll member 30 and the movable scroll member 40 decreases gradually as it approaches the center portion. Therefore, the gas sucked into the working chamber 50 at the suction port 52 is compressed as the working chamber 50 approaches the center portion, and finally, the axial discharge port 54 formed in the fixed scroll member 30. In the chamber 56. In addition, the compressed gas cools the motor 12 while passing through the passage 58 in the chamber 56 and is then sent out from the outlet pipe 60. For this reason, there is no possibility that the compressed gas will leak to the low pressure side, and high compression efficiency can be obtained.

Moreover, the lubricating oil is supplied to the place which the pump 70 installed in the lower end of the crankshaft 24 needs by rotation of the motor 12. As shown in FIG. Since the pump pressure is balanced with the gas pressure by the inner hole 76 through the crankshaft 24 and the drive shaft 18, the lubricating oil is prevented from scattering. In addition, it is evident that this and the force field can be performed by the reverse rotation of the drive shaft 18.

Next, another Example shown in FIG. 3 is demonstrated.

In these drawings, the same parts as in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the scroll compressor 10 of FIG. 3, the fixed scroll member 30 and the movable scroll member 40 of the compression mechanism 14 are arranged opposite to those of FIG. 1.

In the present embodiment, an axial discharge port 55 is formed in the vicinity of the boss portion 46 of the hard plate 42 of the movable scroll member 40, and an axial discharge port 57 is formed in the boss portion of the frame member 62. ) Is formed. According to these axial ejection openings 55 and 57, the gas compressed in the operating chamber 50, like the ejection opening 54 in FIG. 1, does not leak to the suction side to the chamber 56 in the container 16. It is sent out.

In addition, since the discharge ports 55 and 57 extend in the axial direction, processing is easy and does not require complicated work. In addition, it is not necessary to form the hard plate 42 of the movable scroll member 40 thicker than necessary to obtain the required strength.

As mentioned above, although the several preferable Example of this invention was described, this invention is not limited to these Examples, It is clear that various deformation | transformation or changes are possible within the range of the attached claim.

Claims (16)

Power source: It is relative movement in this power source, each of which moves through the inner circumference region and the outer circumference region, and forms a plurality of crescent-operating chambers 50 between these scroll members, and these operations when relative movement in the aforementioned power source is performed. The volume of the chamber 50 varies with the first and second scroll members 30 and 40 varying between the inner circumferential region and the outer circumferential region. The container 16 forming the inner spaces 56 and 59 between the two scroll members and the outer peripheral area of the first scroll member 30 to form the above-described operating chamber 50 outside the container 16. The first communication means 52 and the first communication means 52 which can communicate with each other: Either one of the above-mentioned first and second scroll members 30 and 40 extends one inner circumferential region in the axial direction and opens the aforementioned operation chamber in a space ( Second communication means (54: 55,57) A fluid machine comprising: 53,54. The crankshaft (24) according to claim 1, further comprising a crankshaft (24) having a crank pin (26) rotatably mounted to said second scroll member (40) when said postal machine is driven by said power source (12); : A pair of bearing members 36, 63: 33, 63 for holding the aforementioned crankshaft freely rotatable on both sides of the crank pin 26 in the axial direction, and the aforementioned internal space 56 ( 59. A fluid machine, comprising: third communication means (58) (60) for communicating 59 through the outside of the container. 3. The fluid machine of claim 2, wherein the fluid machine further comprises a frame member 62 which is secured in the container 16 described above, which frame member forms one side of the pair of bearing means described above. A fluid machine comprising: 63). 4. A fluid machine as claimed in claim 3, wherein said second scroll member (30) comprises a boss portion (36) forming the other side of said bearing means. 5. A fluid machine as claimed in claim 4, wherein said second communication means comprises at least one axial passage (54) formed in the boss portion (36) of said second scroll member (30). The power source (12) described above is arranged above the first and second scroll members (30) and (40) as described above, and simultaneously drives the drive shaft (18) integral with the aforementioned crankshaft (24). A fluid machine comprising an induction motor having a center in a direction. The second scroll member (30) according to claim 6, wherein the second scroll member (30) is fixed in the container (16) at a position proximate to the motor (12) and the frame member (62) described above is connected to the second scroll member (30). Fluid machine, characterized in that arranged in a sandwich sandwiching the first scroll member (40) together. 8. The boss portion (36) of the second roll member (30) and (40) described above has a through hole (38), and the through hole (38) is provided with the other side of the bearing means described above. Forming a fluid machine. 6. The vessel (16) according to claim 5, wherein the vessel (16) above stores a lubricant 17 at its lower portion, and the aforementioned axial passage (54) opens in the above-mentioned space (56) above the liquid level of the lubricant (17). Fluid machine, characterized in that. 8. The counter weight (68) according to claim 7, wherein the aforementioned frame member (62) forms an inner chamber between the lower surface of the first scroll member (40) and the aforementioned crankshaft (24) is received in the inner chamber. Fluid machine comprising a). 11. A fluid machine as claimed in claim 10, comprising means (64) disposed in said interior chamber to prevent rotation of said first scroll member (40). 5. A fluid as claimed in claim 4, wherein the frame member (62) mentioned above is fixed in the container (16) at a position proximate to the power source (12) and arranged in a sandwich form for sandwiching the aforementioned second scroll member (40). machine. 13. The method of claim 12, wherein the second communication means described above is formed in at least one axial passage 55 formed in the inner circumference of the first scroll member 30 and in the boss portion 63 of the frame member. And at least one axial passageway 57 in communication with the axial passageway of the first scroll member. 14. The container 16 described above stores the lubricating oil 17, and the axial passage 57 formed in the boss portion 63 of the brake member described above is above the liquid level of the lubricating oil 17. Fluid machine, characterized in that opening in the above-mentioned space (56). 4. The fluid machine according to claim 3, wherein the fluid machine described above further sandwiches the first and second scroll members 30 and 40 together with the frame member 62 described above on a sandwich and the one of the pair of bearing means described above. And a supporting plate 31 having a boss portion 33 for forming a portion, wherein the above-mentioned second scroll member 30 is fixed in the container 16 at a position proximate to the power source 12, and the above-mentioned frame member 62 ) Is disposed on a sandwich with the first scroll member (40) together with the second scroll member (30). 16. The boss portion (33) of claim 15, wherein said second communication means comprises at least one axial passage (55) formed in the inner periphery of said first scroll member (30) and said support plate (31). And at least one axial passageway formed in a proximal portion of and in communication with the axial passageway of the first scroll member.

Images