WO2019142460A1 - Compresseur à spirale - Google Patents

Compresseur à spirale Download PDF

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Publication number
WO2019142460A1
WO2019142460A1 PCT/JP2018/041355 JP2018041355W WO2019142460A1 WO 2019142460 A1 WO2019142460 A1 WO 2019142460A1 JP 2018041355 W JP2018041355 W JP 2018041355W WO 2019142460 A1 WO2019142460 A1 WO 2019142460A1
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WO
WIPO (PCT)
Prior art keywords
frame
key
scroll
oldham ring
movable
Prior art date
Application number
PCT/JP2018/041355
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English (en)
Japanese (ja)
Inventor
加藤　勝三
Original Assignee
ダイキン工業株式会社
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Filing date
Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Publication of WO2019142460A1 publication Critical patent/WO2019142460A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Definitions

  • This disclosure relates to scroll compressors.
  • Patent Document 1 discloses a second frame that vertically divides a space formed by a fixed scroll, a orbiting scroll, an Oldham ring, a first frame fixed to a closed container, a first frame and the fixed scroll. And a scroll fluid machine is disclosed.
  • the Oldham ring is disposed in an upper space defined by the second frame and the fixed scroll together with the orbiting scroll.
  • the two sets of keys formed in the Oldham ring engage with the key groove provided in the second frame, one set engaging with the key groove provided on the rear surface of the mirror plate of the orbiting scroll. It is correct.
  • the key of the Oldham ring is the diameter of the second frame It will be disposed inward in the direction (ie, near the central axis).
  • the load acting on the key of the Oldham ring tends to increase. Therefore, it is difficult to reduce the load acting on the key of the Oldham ring, and it is difficult to improve the reliability of the Oldham joint constituted by the key of the Oldham ring and the key groove of the second frame.
  • the present disclosure aims to provide a scroll compressor capable of improving the reliability of an Oldham joint constituted by the key of the Oldham ring and the key groove of the second frame.
  • a first aspect of the present disclosure relates to a scroll compressor, which is fixed to a casing (10), a housing (30) provided in the casing (10), and the housing (30).
  • the fixed scroll (40), the housing (30), and the fixed scroll (40) are disposed and engaged with the fixed scroll (40) to perform eccentric rotational movement with respect to the fixed scroll (40)
  • Has a first frame (31) and a second frame (32) disposed between the Oldham ring (60) and the first frame (31), and the Oldham ring (60) Is on A key (62) protruding to the second frame (32) side is provided, and the key (62) of the oldham ring (60) is provided on the surface of the second frame (32) facing the oldham ring (60).
  • the key (62) of the Oldham ring (60) can be disposed radially outward of the second frame (32), the key (62) of the Oldham ring (60) Since the load acting on the key (62) of the Oldham ring (60) can be reduced compared to the case of being disposed radially inward of the frame (32) (ie, closer to the central axis), the Oldham ring (60) It is possible to improve the reliability of the Oldham joint constituted by the key (62) and the key groove (35) of the second frame (32).
  • a second aspect of the present disclosure relates to the first aspect, wherein the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) are members of the movable scroll (50).
  • the whole of the key (62) is configured to be accommodated in the key groove (35) in the whole of one cycle of the eccentric rotational movement.
  • the contact area between the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) in one cycle of the eccentric rotational movement of the movable scroll (50) can be secured.
  • it is possible to suppress the fluctuation of the surface pressure acting on the key (62) of the Oldham ring (60), so that the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) Can improve the reliability of the Oldham joint configured by
  • a third aspect of the present disclosure relates to the first aspect, wherein the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) are members of the movable scroll (50).
  • a part of the key (62) is configured to protrude radially outward of the key groove (35) in a part of one cycle of the eccentric rotational movement.
  • the movable range of the key (62) of the Oldham ring (60) can be expanded radially outward of the key groove (35) of the second frame (32).
  • the key of the Oldham ring (60) is more than when the part of the key (62) of the Oldham ring (60) is not protruded radially outward of the key groove (35) of the second frame (32). Since (62) can be disposed radially outward of the second frame (32), the load acting on the key (62) of the Oldham ring (60) can be reduced, and the Oldham ring (60) The reliability of the Oldham joint constituted by the key (62) and the key groove (35) of the second frame (32) can be improved.
  • a fourth aspect of the present disclosure relates to the third aspect, wherein the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) are members of the movable scroll (50).
  • the entire key (62) is accommodated in the key groove (35) when the rotation torque of the movable scroll (50) is maximized in one cycle of the eccentric rotational movement.
  • the key (62) of the Oldham ring (60) and the second frame when the rotation torque of the movable scroll (50) becomes maximum during one cycle of the eccentric rotational movement of the movable scroll (50) A contact area with the key groove (35) of (32) can be secured.
  • the load acting on the key (62) of the Oldham ring (60) tends to be large, the rise in the surface pressure acting on the key (62) of the Oldham ring (60) can be suppressed.
  • the reliability of the Oldham coupling constituted by the key (62) of the ring (60) and the key groove (35) of the second frame (32) can be improved.
  • a fifth aspect of the present disclosure relates to any one of the first to fourth aspects, wherein the key groove (35) of the second frame (32) axially extends the second frame (32). It is penetrating.
  • the projection length of the key (62) of the Oldham ring (60) is restricted by the depth of the key groove (35) of the second frame (32).
  • the protrusion length of the key (62) of the Oldham ring (60) is lengthened, and the contact area between the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) is enlarged.
  • the surface pressure acting on the key (62) of the Oldham ring (60) can be reduced, the key groove (35) of the key (62) of the Oldham ring (60) and the second frame (32) can be reduced.
  • a sixth aspect of the present disclosure relates to the fifth aspect, wherein the first frame (31) is formed to face the key groove (35) of the second frame (32), and lubricating oil is formed.
  • An oil reservoir (36) to be stored is provided, and the key (62) of the Oldham ring (60) penetrates the key groove (35) of the second frame (32) to be the first frame (31) Extends to the oil reservoir (36).
  • the lubricating oil stored in the oil reservoir (36) of the first frame (31) is agitated by the key (62) of the Oldham ring (60). Can.
  • the flow of lubricating oil in the operation of the scroll compressor can be made smooth.
  • the key (62) of the Oldham ring (60) can be reduced, the key (62) of the Oldham ring (60) and the key groove (35) of the second frame (32) can be reduced. Can improve the reliability of the Oldham joint configured by
  • FIG. 1 is a longitudinal sectional view illustrating the configuration of the scroll compressor according to the first embodiment.
  • FIG. 2 is a longitudinal sectional view illustrating the main part of the scroll compressor shown in FIG.
  • FIG. 3 is a plan view illustrating the configuration of the first frame shown in FIG.
  • FIG. 4 is a plan view illustrating the configuration of the second frame shown in FIG.
  • FIG. 5 is a plan view illustrating the configuration of the movable scroll shown in FIG.
  • FIG. 6 is a plan view illustrating the configuration of the Oldham ring shown in FIG.
  • FIG. 7 is a diagram illustrating the behavior of the movable scroll and the Oldham ring in the driving operation of the scroll compressor according to the first embodiment.
  • FIG. 8 is a plan view illustrating the configuration of a first frame in the scroll compressor of the second embodiment.
  • FIG. 9 is a plan view illustrating the configuration of the movable scroll in the scroll compressor according to the second embodiment.
  • FIG. 10 is a diagram illustrating the behavior of the movable scroll and the Oldham ring in the driving operation of the scroll compressor according to the second embodiment.
  • FIG. 11 is a graph illustrating the relationship between the rotation angle of the drive shaft and the rotation torque of the movable scroll.
  • FIG. 12 is a longitudinal cross-sectional view illustrating the main part of the scroll compressor according to the third embodiment.
  • FIG. 1 shows a configuration example of a scroll compressor (1) according to a first embodiment.
  • the scroll compressor (1) is provided, for example, in a vapor compression type refrigerant circuit (not shown), and compresses a refrigerant (an example of a fluid).
  • a refrigerant an example of a fluid
  • the refrigerant compressed by the scroll compressor (1) is condensed by the condenser and depressurized by the pressure reducing mechanism, and then evaporated by the evaporator and sucked into the scroll compressor (1) Be done.
  • the scroll compressor (1) includes a casing (10), a compression mechanism (20), an electric motor (21), and a drive shaft (22).
  • the casing (10) is formed in an elongated cylindrical shape whose both ends are closed.
  • the compression mechanism (20) and the electric motor (21) are accommodated in order from the upper side.
  • the compression mechanism (20) and the electric motor (21) are connected by a drive shaft (22) extending in the axial direction (vertical direction) in the casing (10).
  • the casing (10) is provided with a suction pipe (11) and a discharge pipe (12).
  • the suction pipe (11) penetrates the upper part of the casing (10) in the axial direction and is connected to the compression mechanism (20) to introduce a low pressure fluid (for example, gas refrigerant) into the compression mechanism (20).
  • the discharge pipe (12) radially penetrates the body portion of the casing (10) to communicate with the internal space of the casing (10) and discharges the high pressure fluid in the casing (10) to the outside of the casing (10) .
  • an oil reservoir (13) in which the lubricating oil is stored is provided at the bottom of the casing (10.
  • a bearing member (14) is provided below the motor (21) in the casing (10).
  • a through hole is formed in the central portion of the bearing member (14), and the drive shaft (22) is inserted through the through hole.
  • the compression mechanism (20) is housed in a casing (10).
  • the compression mechanism (20) is configured to compress the fluid introduced via the suction pipe (11) and discharge it into the casing (10).
  • the configuration of the compression mechanism (20) will be described in detail later.
  • the motor (21) is accommodated in the casing (10) and disposed below the compression mechanism (20).
  • the motor (21) has a stator (21a) and a rotor (21b).
  • the stator (21a) is formed in a cylindrical shape and fixed to the casing (10).
  • the core cut which penetrates a stator (21a) to an axial direction is provided in the outer peripheral surface of a stator (21a).
  • the rotor (21b) is formed in a cylindrical shape, and is rotatably inserted in the inner periphery of the stator (21a).
  • the drive shaft (22) is inserted and fixed to the inner periphery of the rotor (21b).
  • the drive shaft (22) has a main shaft portion (22a), an eccentric shaft portion (22b), and a counterweight portion (22c).
  • the main shaft portion (22a) extends in the axial direction (vertical direction) of the casing (10).
  • the eccentric shaft (22b) is provided at the upper end of the main shaft (22a). Further, the outer diameter of the eccentric shaft portion (22b) is smaller than the outer diameter of the main shaft portion (22a), and the axial center is eccentric by a predetermined distance with respect to the axial center of the main shaft portion (22a) .
  • the counterweight portion (22c) protrudes radially outward from the main shaft portion (22a), and is configured to have a dynamic balance at the time of rotation.
  • an oil supply passage (22d) is formed inside the drive shaft (22).
  • the oil supply passage (22d) includes a compression mechanism (20) and a journal bearing (for example, a drive shaft (22) and a bearing member (14)) for lubricating oil stored in the bottom (oil reservoir (13)) of the casing (10).
  • a suction nozzle (22e) is provided at the lower end portion of the drive shaft (22).
  • the suction nozzle (22e) is a member for sucking up the lubricating oil from the oil reservoir (13), and constitutes a volumetric pump.
  • the suction port (lower end opening in FIG.
  • the compression mechanism (20) comprises a housing (30), a fixed scroll (40), a movable scroll (50) and an Oldham ring (60).
  • the housing (30) is provided in the casing (10).
  • the fixed scroll (40) is fixed to the housing (30).
  • the movable scroll (50) is disposed between the housing (30) and the fixed scroll (40), and is configured to be engaged with the fixed scroll (40) to perform eccentric rotational movement with respect to the fixed scroll (40) ing.
  • the Oldham ring (60) is disposed between the housing (30) and the movable scroll (50), and is configured to regulate rotation of the movable scroll (50).
  • the housing (30) is fixed in the casing (10) and divides the internal space of the casing (10) into two spaces in the axial direction.
  • the upper space of the housing (30) constitutes a first space (S1)
  • the lower space of the housing (30) constitutes a second space (S2).
  • the housing (30) has a first frame (31) and a second frame (32) disposed between the Oldham ring (60) and the first frame (31). Further, a housing space (S30) in which the counterweight portion (22c) of the drive shaft (22) is housed is formed between the first frame (31) and the second frame (32).
  • the first frame (31) is formed in a thick disk shape, and the outer peripheral surface thereof is fixed to the inner peripheral surface of the casing (10). Then, an outer peripheral edge (an outer peripheral wall (43)) of the fixed scroll (40) is fixed to the outer peripheral edge of the first frame (31).
  • the first frame (31) is provided with a first recess (31a), a second recess (31b), and a bulging portion (31c).
  • the first recess (31a) is recessed in the axial direction (downward in FIG. 2) from the center of the surface (upper surface in FIG. 2) facing the fixed scroll (40) from the fixed scroll (40).
  • the first recess (31a) is formed in a circular shape in plan view. That is, the first recess (31a) is a cylindrical recess opened in the upper surface of the first frame (31).
  • the second recess (31b) is recessed in the axial direction (downward in FIG. 2) from the central portion of the bottom surface of the first recess (31a).
  • the second recess (31b) is formed in a circular shape in plan view. That is, the second recess (31b) is a cylindrical recess opened on the bottom surface of the first recess (31a).
  • the second recess (31b) is formed in a circular shape smaller than the shape of the first recess (31a) in plan view.
  • the bulging portion (31c) bulges from the first frame (31) in a direction away from the fixed scroll (40) (downward in FIG. 2). Further, a through hole is formed in the central portion of the bulging portion (31c) to axially penetrate the bulging portion (31c), and a bearing metal (31d) is inserted through the through hole. The upper end portion of the main shaft portion (22a) of the drive shaft (22) is inserted through the bearing metal (31d). With such a configuration, the bulging portion (31c) rotatably supports the upper end portion of the main shaft portion (22a) of the drive shaft (22).
  • the second frame (32) is formed in an annular plate shape.
  • the outer shape of the second frame (32) has a shape corresponding to the first recess (31a) of the first frame (31) (specifically, slightly smaller than the shape of the first recess (31a) in plan view) It is circular.
  • the second frame (32) is fitted into the first recess (31a) of the first frame (31) and fixed by a bolt. With such a configuration, a space surrounded by the second recess (31b) of the first frame (31) and the second frame (32) constitutes a housing space (S30).
  • annular convex portion (32a) is provided at the inner peripheral edge portion of the second frame (32).
  • a ring-shaped recessed groove along the circumferential direction is provided on a projecting end surface of the annular convex portion (32a), and a seal ring (32b) is fitted in the recessed groove.
  • the seal ring (32b) is in sliding contact with the back surface (the lower surface in FIG. 2) of the movable side end plate (51), and seals the gap between the second frame (32) and the movable side end plate (51).
  • the seal ring (32b) forms a space facing the back surface of the movable side end plate (51) (ie, a space between the second frame (32) and the movable scroll (50)) A space on the inner peripheral side of the seal ring (32b) and a space on the outer peripheral side of the seal ring (32b) are divided.
  • a seal ring (33) is provided between the first frame (31) and the second frame (32).
  • the seal ring (33) seals the gap between the first frame (31) and the second frame (32).
  • a ring-shaped recessed groove is provided along the inner peripheral edge of the bottom surface of the first recess (31a) in the bottom surface (annular bottom surface) of the first recess (31a) of the first frame (31)
  • a seal ring (33) is fitted in the recessed groove.
  • the fixed scroll (40) is disposed on one side (upper side in FIG. 2) in the axial direction of the housing (30).
  • the fixed scroll (40) has a fixed side end plate (41), a fixed side wrap (42), and an outer peripheral wall (43).
  • the stationary side end plate (41) is formed in a substantially circular plate shape.
  • the stationary side wrap (42) is formed in a spiral wall shape that describes an involute curve, and protrudes from the front surface (the lower surface in FIG. 2) of the stationary side mirror plate (41).
  • the outer peripheral wall portion (43) is formed so as to surround the outer peripheral side of the fixed side wrap (42), and protrudes from the front surface of the fixed side end plate (41).
  • the end surface (the lower surface in FIG. 2) of the fixed side wrap (42) and the end surface of the outer peripheral wall portion (43) are substantially flush with each other.
  • a suction port (not shown) is formed on the outer peripheral wall (43) of the fixed scroll (40).
  • the downstream end of the suction pipe (11) is connected to the suction port.
  • a discharge port (44) which penetrates the fixed side end plate (41) is formed at the center of the fixed side end plate (41) of the fixed scroll (40).
  • the movable scroll (50) has a movable side end plate (51), a movable side wrap (52), and a boss (53).
  • the movable side end plate (51) is formed in a substantially circular plate shape.
  • the movable side wrap (52) is formed in a spiral wall shape that describes an involute curve, and protrudes from the front surface (upper surface in FIG. 2) of the movable side mirror plate (51).
  • the boss portion (53) is formed in a cylindrical shape, and is disposed at the center of the rear surface (the lower surface in FIG. 2) of the movable side end plate (51).
  • the movable wrap (52) of the movable scroll (50) is engaged with the fixed wrap (42) of the fixed scroll (40).
  • a compression chamber (S20) is formed between the fixed scroll (40) and the movable scroll (50).
  • the compression chamber (S20) is a space for compressing the fluid, and compresses the fluid sucked from the suction pipe (11) through the suction port (not shown) and discharges the compressed fluid through the discharge port (44) Is configured as.
  • the compression mechanism (20) is provided with a communication passage (70).
  • the communication passage (70) is a passage for flowing the fluid discharged into the first space (S1) into the second space (S2) (that is, the space between the compression mechanism (20) and the motor (21)). is there.
  • the communication passage (70) is constituted by the scroll passage (71) and the housing passage (72).
  • the scroll side passage (71) axially penetrates the outer peripheral edge portion of the outer peripheral wall (43) of the fixed scroll (40).
  • the housing side passage (72) penetrates the outer peripheral edge portion of the first frame (31) in the axial direction.
  • the compression mechanism (20) is provided with an oil discharge passage (80).
  • the oil discharge passage (80) is a passage for discharging the lubricating oil of the compression mechanism (20) to the second space (S2).
  • the oil discharge passage (80) is constituted by the connection passage (81) and the oil return member (82).
  • the connection passage (81) extends radially outward from the second recess (31b) of the first frame (31).
  • the oil return member (82) is provided such that its inflow end is connected to the outflow end of the connection passage (81) and its outflow end faces downward, and the lubricating oil flowing into the connection passage (81) is It is configured to flow into the space (S2).
  • the Oldham ring (60) is formed in a ring shape having a rectangular cross section.
  • the thickness of the Oldham ring (60) is constant over the entire circumference of the Oldham ring (60).
  • the Oldham ring (60) is provided with two movable side keys (61) and two fixed side keys (62).
  • the Oldham ring (60) in the Oldham ring (60), four projecting portions that respectively protrude outward in the radial direction of the Oldham ring (60) are circumferentially spaced at equal intervals (90 ° intervals). It is provided. Then, two movable side keys (61) are respectively provided on two of the four protruding parts of the Oldham ring (60) facing each other, and the two fixed side keys (62) are provided for the remaining two protruding parts. ) Are provided in a protruding manner.
  • the movable side key (61) protrudes on the movable scroll (50) side (upper side in FIG. 2).
  • the movable side key (61) is a protrusion formed in a substantially rectangular parallelepiped shape, and is provided on the surface (upper surface in FIG. 2) facing the movable scroll (50) of the Oldham ring (60) .
  • the two movable side keys (61) face each other across the central axis of the Oldham ring (60). That is, one movable side key (61) is disposed on the opposite side of the other movable side key (61) across the central axis of the Oldham ring (60).
  • the surface of the Oldham ring (60) that faces the movable scroll (50) is a surface that is in sliding contact with the back surface (the lower surface in FIG. 2) of the movable end plate (51) of the movable scroll (50). ing.
  • the fixed side key (62) protrudes to the second frame (32) side (lower side in FIG. 2).
  • the fixed side key (62) is a protrusion formed in a substantially rectangular parallelepiped shape, and provided on the surface (the lower surface in FIG. 2) facing the second frame (32) of the Oldham ring (60) There is.
  • the two stationary side keys (62) face each other across the central axis of the Oldham ring (60). That is, one fixed side key (62) is disposed on the opposite side of the other fixed side key (62) across the central axis of the Oldham ring (60).
  • the facing direction of the two fixed side keys (62) is orthogonal to the facing direction of the two movable side keys (61).
  • the surface of the Oldham ring (60) facing the fixed side key (62) is a surface that is in sliding contact with the surface (upper surface in FIG. 2) facing the Oldham ring (60) of the second frame (32). It is a face.
  • Movable side key groove Also, as shown in FIGS. 2 and 5, in the surface (lower surface in FIG. 2) of the movable side plate (51) of the movable scroll (50) opposite to the Oldham ring (60), two movable side key grooves ( 54) are provided.
  • the two movable side keys (61) of the Oldham ring (60) are slidably fitted in the two movable side key grooves (54), respectively.
  • the surface of the movable side end plate (51) opposite to the Oldham ring (60) is a surface in sliding contact with the surface (upper surface in FIG. 2) of the oldham ring (60) opposite to the movable scroll (50). It has become.
  • the movable side key groove (54) of the movable side end plate (51) extends in the radial direction of the movable side end plate (51) and opens at the outer periphery of the movable side end plate (51). That is, the movable side key groove (54) is formed to pierce the movable side end plate (51) to the outer periphery.
  • the two movable side keys (61) of the movable side end plate (51) face each other across the central axis of the movable scroll (50). That is, one movable side key (61) is disposed on the opposite side of the other movable side key (61) across the central axis of the movable scroll (50).
  • the central axis of the movable scroll (50) can be regarded as coinciding with the axial center of the eccentric shaft portion (22b) of the drive shaft (22).
  • two fixed side key grooves (35) are provided on the surface (upper surface in FIG. 2) of the second frame (32) facing the Oldham ring (60).
  • the two stationary side keys (62) of the Oldham ring (60) are slidably fitted in the two stationary side key grooves (35), respectively.
  • the surface of the second frame (32) facing the Oldham ring (60) is a surface that is in sliding contact with the surface (bottom surface in FIG. 2) of the Oldham ring (60) facing the second frame (32). It is a face.
  • the fixed side key groove (35) of the second frame (32) extends in the radial direction of the second frame (32) and opens at the outer periphery of the second frame (32). That is, the fixed side key groove (35) is formed to cut the second frame (32) to the outer periphery. In this example, the radial inner end of the fixed side key groove (35) is closed. That is, the fixed side key groove (35) does not cut the inner periphery of the second frame (32).
  • the two fixed side key grooves (35) of the second frame (32) face each other across the central axis of the second frame (32). That is, one fixed side key groove (35) is disposed on the opposite side of the other fixed side key groove (35) across the central axis of the second frame (32).
  • the facing direction of the two fixed side key grooves (35) is orthogonal to the facing direction of the two movable side key grooves (54).
  • the central axis of the second frame (32) can be regarded as coinciding with the axial center of the main shaft portion (22a) of the drive shaft (22).
  • the movable scroll (50) of the compression mechanism (20) is rotationally driven by the drive shaft (22).
  • the movable scroll (50) is restricted in rotation by the Oldham ring (60), and is turned about the axis of the main shaft portion (22a) of the drive shaft (22) with a radius of eccentricity of the eccentric shaft portion (22b) It revolves on the orbit.
  • fluid for example, low-pressure gas refrigerant
  • fluid flows from the suction pipe (11) to the compression chamber (S20) through the suction port (not shown) of the compression mechanism (20). It is inhaled and compressed.
  • the fluid (for example, high pressure gas refrigerant) compressed in the compression chamber (S20) is discharged into the first space (S1) through the discharge port (44) of the fixed scroll (40).
  • the high pressure fluid discharged into the first space (S1) flows into the second space (S2) through the fixed scroll (40) and the communication passage (70) provided in the housing (30).
  • the high pressure fluid flowing into the second space (S2) is discharged to the outside of the casing (10) through the discharge pipe (12).
  • the lubricating oil in the oil reservoir (13) is pumped by the suction nozzle (22e) (the function of pumping up the lubricating oil). And is supplied to the sliding contact portion between the drive shaft (22) and the compression mechanism (20) (or bearing member (14)).
  • the lubricating oil flowing through the oil supply passage (22d) is a sliding contact portion between the drive shaft (22) and the bearing member (14) through a branch passage (not shown) extending radially from the oil supply passage (22d) And a sliding contact portion between the main shaft portion (22a) of the drive shaft (22) and the bulging portion (31c) of the first frame (31).
  • the lubricating oil that has flowed out from the upper end of the oil supply passage (22d) passes through the notch (not shown) provided on the eccentric shaft (22b) of the drive shaft (22), and the eccentric shaft (22b) of the drive shaft (22) ) And the boss (53) of the movable scroll (50), and then the inner peripheral space (the space on the inner peripheral side of the seal ring (32b)) and the accommodation space of the second frame (32) (S30) and stored in the oil reservoir space configured by
  • the lubricating oil stored in the oil reservoir space flows into the second space (S2) through the oil discharge passage (80), and the oil reservoir portion (13) through the core cut provided on the stator (21a) of the motor (21). Return to).
  • Part of the lubricating oil stored in this space is the sliding contact portion between the movable scroll (50) and the Oldham ring (60) (in FIG. 2, the lower surface of the movable side plate (51) and the upper surface of the Oldham ring (60)). Between the second frame (32) and the Oldham ring (60) (between the lower surface of the Oldham ring (60) and the upper surface of the second frame (32) in FIG. 2) .
  • a part of the lubricating oil accumulated in this space is a sliding contact portion between the movable scroll (50) and the Oldham ring (60) through the movable side key groove (54) and the fixed side key groove (35) and the second It is supplied to the sliding contact portion between the frame (32) and the Oldham ring (60).
  • the lubricating oil used for lubricating the sliding contact portion between the movable scroll (50) and the Oldham ring (60) and the sliding contact portion between the second frame (32) and the Oldham ring (60) is a compression chamber (S20). ) And discharged into the first space (S1) together with the discharge gas, separated from the fluid (refrigerant) in the internal space of the casing (10), and returned to the oil reservoir (13).
  • the movable side key (61) located on the right side is referred to as “first movable side key (61)”
  • the movable side key (61) located on the left side is referred to as “second movable side
  • the movable side key groove (54) positioned on the right side is referred to as “first movable side key groove (54)”
  • the movable side key groove (54) positioned on the left side is referred to as “second movable side key groove (54) ”.
  • the upper fixed side key (62) is referred to as “first fixed side key (62)
  • the lower fixed side key (62) is referred to as "second fixed side key (62)".
  • first fixed side key groove (35) the fixed side key groove (35) positioned on the upper side
  • second fixed side key Let the groove (35) ". The same applies to the description of FIG. 10 described later.
  • the first movable side key (61) moves the first movable side key groove (54) radially outward.
  • the second movable side key (61) moves inward in the radial direction of the second movable side key groove (54).
  • the first fixed side key (62) moves radially outward toward the first fixed side key groove (35), and the second fixed side key (62) is moved to the second fixed side key groove (35).
  • Moving radially inward That is, the first and second movable side keys (61) move the first and second movable side key grooves (54) toward the right in FIG. 7, respectively, and the first and second fixed side keys are moved.
  • the first and second fixed side key grooves (35) are moved toward the upper side of FIG.
  • the movable scroll (50) moves upward from the right side along the revolving track while being restricted from rotating.
  • the first movable side key (61) moves the first movable side key groove (54) radially outward.
  • the second movable side key (61) moves inward in the radial direction of the second movable side key groove (54).
  • the first fixed side key (62) moves radially inward to the first fixed side key groove (35), and the second fixed side key (62) is moved to the second fixed side key groove (35).
  • Moving radially outward That is, the first and second movable side keys (61) move the first and second movable side key grooves (54) toward the right in FIG. 7, respectively, and the first and second fixed side keys are moved.
  • (62) moves the first and second fixed side key grooves (35) downward in FIG. Thereby, the movable scroll (50) moves from the upper side to the left side along the revolving track while being restricted from rotating.
  • the first movable side key (61) moves the first movable side key groove (54) radially inward.
  • the second movable side key (61) moves the second movable side key groove (54) radially outward.
  • the first fixed side key (62) moves radially inward to the first fixed side key groove (35), and the second fixed side key (62) is moved to the second fixed side key groove (35).
  • Moving radially outward That is, the first and second movable side keys (61) move the first and second movable side key grooves (54) toward the left in FIG. 7, respectively, and the first and second fixed side keys are moved.
  • (62) moves the first and second fixed side key grooves (35) downward in FIG. Thereby, the movable scroll (50) moves from the left to the lower side along the revolving track while being restricted from rotating.
  • the first movable side key (61) turns the first movable side key groove (54) radially inward.
  • the second movable side key (61) moves the second movable side key groove (54) radially outward.
  • the first fixed side key (62) moves radially outward toward the first fixed side key groove (35), and the second fixed side key (62) is moved to the second fixed side key groove (35).
  • Moving radially inward That is, the first and second movable side keys (61) move the first and second movable side key grooves (54) toward the left in FIG. 7, respectively, and the first and second fixed side keys are moved.
  • the first and second fixed side key grooves (35) are moved toward the upper side of FIG. Thereby, the movable scroll (50) moves from the lower side to the right side along the revolving track while being restricted from rotating.
  • the radial distance from the central axis of the second frame (32) to the first fixed side key (62) is minimum when the rotation angle of the drive shaft (22) is 270 °. And becomes maximum when the rotation angle of the drive shaft (22) is 90 °.
  • the radial distance from the central axis of the second frame (32) to the second fixed side key (62) becomes minimum when the rotation angle of the drive shaft (22) is 90 °, and the drive shaft (22) Is the largest when the rotation angle is 270 °.
  • the first fixed side key (62) has a maximum radial distance from the central axis of the second frame (32) to the first fixed side key (62) (ie, the drive axis). In the case where the rotation angle of (22) is 90 °), it does not protrude from the first fixed side key groove (35). In addition, when the radial distance from the central axis of the second frame (32) to the first stationary key (62) is minimized (ie, the rotation angle of the drive shaft (22)) (In the case of 270 °) also does not protrude from the first fixed side key groove (35).
  • the second fixed side key (62) has a maximum radial distance from the central axis of the second frame (32) to the second fixed side key (62) (see FIG. 7). That is, when the rotation angle of the drive shaft (22) is 270 °), it does not protrude from the second fixed side key groove (35). Further, the second fixed side key (62) is such that when the radial distance from the central axis of the second frame (32) to the second fixed side key (62) is minimum (ie the rotation angle of the drive shaft (22) is Also when it is 90 °), it does not protrude from the second fixed side key groove (35).
  • the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32) are in one cycle of the eccentric rotational movement of the movable scroll (50).
  • the entire stationary key (62) is configured to fit within the stationary key groove (35).
  • the Oldham ring ( The fixed side key (62) of 60) can be arranged radially outward of the second frame (32).
  • the fixed-side key (60) of the Oldham ring (60) is smaller than when the fixed-side key (62) of the Oldham ring (60) is disposed radially inward (closer to the central axis) of the second frame (32). Since the load acting on 62) can be reduced, the reliability of the Oldham joint constituted by the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32) Can be improved.
  • the fixed key (62) of the Oldham ring (60) and the fixed key groove (35) of the second frame (32) are used in the entire fixed cycle of the eccentric rotational movement of the movable scroll (50) 62) is configured to be entirely contained in the fixed side key groove (35), the fixed side key (62) of the Oldham ring (60) and the whole of one cycle of the eccentric rotational movement of the movable scroll (50) A contact area with the fixed side key groove (35) of the second frame (32) can be secured.
  • the scroll compressor (1) according to the second embodiment is the scroll compressor according to the first embodiment in the behavior of the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32). It is different from 1).
  • the fixed key (62) of the Oldham ring (60) and the fixed key groove (35) of the second frame (32) are part of one cycle of the eccentric rotational movement of the movable scroll (50).
  • a part of the stationary side key (62) is configured to protrude radially outward of the stationary side key groove (35).
  • the first frame (31) is provided with two fixed side relief portions (31 e).
  • the fixed side relief portion (31e) is fixed when the fixed side key (62) of the Oldham ring (60) protrudes radially outward of the fixed side key groove (35) of the second frame (32). It is provided to avoid contact between the fixed side key (62) protruding outward in the radial direction of the side key groove (35) and the first frame (31).
  • the two fixed side escape portions (31e) are recesses which are respectively recessed outward in the radial direction from the inner peripheral surface of the first recess (31a) of the first frame (31).
  • the two fixed side key grooves (35) of the frame (32) are respectively provided radially outward.
  • the movable side end plate (51) of the movable scroll (50) on the movable side end plate (51) of the movable scroll (50), two projecting portions which respectively project outward in the radial direction of the movable scroll (50) Is provided.
  • the two projecting portions of the movable side end plate (51) face each other across the central axis of the movable scroll (50).
  • the two movable side key grooves (54) are respectively disposed in the two projecting portions of the movable side end plate (51).
  • two movable side relief portions (31f) are provided in the first frame (31).
  • the movable side relief portion (31f) is provided to avoid contact between the two projecting portions of the movable side end plate (51) and the first frame (31).
  • the two movable side relief portions (31f) are concave portions which are respectively recessed outward in the radial direction from the inner peripheral surface of the first concave portion (31a) of the first frame (31). They are respectively arranged radially outward of the two projecting portions of the end plate (51).
  • the remaining structure of the scroll compressor (1) according to the second embodiment is similar to that of the scroll compressor (1) according to the first embodiment.
  • the radial distance from the central axis of the second frame (32) to the first fixed side key (62) is 270 ° of the rotation angle of the drive shaft (22). And the rotation angle of the drive shaft (22) is 90 °.
  • the radial distance from the central axis of the second frame (32) to the second fixed side key (62) becomes minimum when the rotation angle of the drive shaft (22) is 90 °, and the drive shaft (22) Is the largest when the rotation angle is 270 °.
  • the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32) are part of one cycle of the eccentric rotational movement of the movable scroll (50).
  • a part of the fixed side key (62) is configured to protrude radially outward of the fixed side key groove (35).
  • the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32) are part of one cycle of the eccentric rotational movement of the movable scroll (50).
  • the movable range of the fixed-side key (62) of the Oldham ring (60) is set to the first by forming a part of the fixed-side key (62) to protrude radially outward of the fixed-side key groove (35). It can expand outward in the radial direction of the fixed side key groove (35) of the two frames (32).
  • the Oldham ring (60) does not protrude part of the fixed side key (62) of the Oldham ring (60) radially outward of the fixed side key groove (35) of the second frame (32). Since the stationary side key (62) of 60) can be disposed radially outward of the second frame (32), the load acting on the stationary side key (62) of the Oldham ring (60) can be reduced. It is possible to improve the reliability of the Oldham joint constituted by the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32).
  • FIG. 11 illustrates the relationship between the rotation angle of the drive shaft (22) and the rotation torque of the movable scroll (50).
  • the rotation torque of the movable scroll (50) is a torque that acts in the direction of rotating the movable scroll (50) by the pressure of the fluid in the compression chamber (S20).
  • the rotation torque of the movable scroll (50) changes in accordance with the change in the rotation angle of the drive shaft (22).
  • the magnitude of the rotation torque of the movable scroll (50) is maximum when the rotation angle of the drive shaft (22) is about 280 °, and the rotation angle of the drive shaft (22) is about 20 ° If it is the smallest.
  • the load acting on the fixed key (62) of the Oldham ring (60) tends to increase as the rotation torque of the movable scroll (50) increases. Therefore, the fixed side key (62) is pushed out radially outward of the fixed side key groove (35) in a part of one cycle of the eccentric rotational movement of the movable scroll (50).
  • 62) and the fixed side key groove (35), the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32) are movable scroll (50) Is configured such that all of the fixed side keys (62) fit within the fixed side key groove (35) when the rotation torque of the movable scroll (50) is maximized in one cycle of the eccentric rotational movement of preferable.
  • the fixed side key (62) and the fixed side key groove (35) have a rotation angle at which the rotation torque of the movable scroll (50) is maximized in one cycle of the eccentric rotational movement of the movable scroll (50). It is preferable that all of the fixed side keys (62) be configured to be accommodated in the fixed side key groove (35) in a predetermined period including. For example, when the rotation torque of the movable scroll (50) changes as shown in FIG. 11, the fixed side key (62) and the fixed side key groove (35) are included in one cycle of the eccentric rotational movement of the movable scroll (50).
  • the entire stationary key (62) may be configured to fit within the stationary key groove (35) in a period of 270 ° to 290 ° (period of ⁇ 10 ° of 280 °).
  • the fixed key (62) of the Oldham ring (60) and the fixed key groove (35) of the second frame (32) are movable scrolls (50) in one cycle of the eccentric rotational movement of the movable scroll (50). It is preferable that a part of the fixed side key (62) is configured to protrude outward in the radial direction of the fixed side key groove (35) when the rotation torque of the motor becomes minimum.
  • the fixed side key (62) and the fixed side key groove (35) have a rotation angle at which the rotation torque of the movable scroll (50) is minimized in one cycle of the eccentric rotational movement of the movable scroll (50). It is preferable that a part of the fixed side key (62) is configured to protrude outward in the radial direction of the fixed side key groove (35) in a predetermined period including. For example, when the rotation torque of the movable scroll (50) changes as shown in FIG. 11, the fixed side key (62) and the fixed side key groove (35) are included in one cycle of the eccentric rotational movement of the movable scroll (50). A part of the fixed side key (62) is configured to protrude radially outward of the fixed side key groove (35) in a period of 10 ° to 30 ° (period of ⁇ 10 ° of 20 °) May be
  • the movable scroll of the movable scroll (50) within one cycle of the eccentric rotational movement of the movable scroll (50) is used as the fixed side key (62) of the Oldham ring (60) and the fixed side key groove (35) of the second frame (32).
  • One cycle of the eccentric rotational movement of the movable scroll (50) by configuring the whole of the fixed side key (62) to be accommodated in the fixed side key groove (35) when the rotation torque of (50) is maximized.
  • the contact area between the fixed key (62) of the Oldham ring (60) and the fixed key groove (35) of the second frame (32) is secured when the rotation torque of the movable scroll (50) is maximized can do.
  • the scroll compressor (1) according to the third embodiment is different from the scroll compressor (1) according to the first embodiment (or the second embodiment) in the configuration of the first frame (31) and the second frame (32).
  • the fixed side key groove (35) of the second frame (32) penetrates the second frame (32) in the axial direction.
  • an oil reservoir (36) is provided in the first frame (31).
  • the oil reservoir (36) is formed to face the fixed side key groove (35) of the second frame (32), and is configured to store lubricating oil.
  • the fixed side key (62) of the Oldham ring (60) penetrates the fixed side key groove (35) of the second frame (32) and extends to the oil reservoir (36) of the first frame (31) There is.
  • oil reservoir (36) for example, lubrication used for lubricating the sliding contact portion between the outer peripheral wall (43) of the fixed scroll (40) and the movable side plate (51) of the movable scroll (50). Oil flows in and is stored.
  • the lubricating oil stored in the oil reservoir (36) flows into, for example, the compression chamber (S20) and is discharged to the first space (S1) together with the discharge gas, and fluid (refrigerant) in the internal space of the casing (10) It is separated from the oil and returns to the oil reservoir (13).
  • the other configuration of the scroll compressor (1) according to the third embodiment is the same as the configuration of the scroll compressor (1) according to the first embodiment (or the second embodiment).
  • the stationary side key groove (35) of the second frame (32) axially penetrates the second frame (32), whereby the stationary side key groove (35) of the second frame (32) is formed. It is possible to avoid that the projection length (axial length) of the fixed side key (62) of the Oldham ring (60) is restricted by the depth of. As a result, the fixed length key (62) of the Oldham ring (60) is extended to lengthen the fixed length key (62) of the Oldham ring (60) and the fixed length key groove (35) of the second frame (32). The contact pressure with the fixed side key (62) of the Oldham ring (60) can be reduced, and the fixed side key (62) and the The reliability of the Oldham joint constituted by the fixed side key groove (35) of the two frames (32) can be improved.
  • the fixed side key (62) of the Oldham ring (60) penetrates the fixed side key groove (35) of the second frame (32) and extends to the oil reservoir (36) of the first frame (31)
  • the fixed side key (62) of the Oldham ring (60) stirs the lubricating oil stored in the oil reservoir (36) of the first frame (31) be able to.
  • the flow of lubricating oil in the operation of the scroll compressor (1) can be made smooth.
  • this disclosure is useful as a scroll compressor.

Abstract

Un boîtier (30) comporte un premier cadre (31) et un second cadre (32) qui est disposé entre un anneau d'Oldham (60) et le premier cadre (31). L'anneau d'Oldham (60) est pourvu d'une clé (62) faisant saillie vers le côté du second cadre (32). La surface du second cadre (32), qui fait face à l'anneau d'Oldham (60), est pourvue d'une rainure de clé (35) dans laquelle la clé (62) de l'anneau d'Oldham (60) est ajustée de manière coulissante. La rainure de clavette (35) dans le second cadre (32) s'étend dans le second cadre (32) dans une direction radiale et s'ouvre sur la périphérie externe du second cadre (32).
PCT/JP2018/041355 2018-01-19 2018-11-07 Compresseur à spirale WO2019142460A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-007417 2018-01-19
JP2018007417A JP2019124212A (ja) 2018-01-19 2018-01-19 スクロール圧縮機

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WO2019142460A1 true WO2019142460A1 (fr) 2019-07-25

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JP (1) JP2019124212A (fr)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138183A (ja) * 1986-11-29 1988-06-10 Toshiba Corp スクロ−ル形圧縮機
JPH04303191A (ja) * 1991-03-29 1992-10-27 Toshiba Corp スクロール式圧縮機
JPH06341380A (ja) * 1993-04-14 1994-12-13 Daikin Ind Ltd スクロール流体機械
JP2007231960A (ja) * 2007-06-18 2007-09-13 Mitsubishi Electric Corp スクロール圧縮機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138183A (ja) * 1986-11-29 1988-06-10 Toshiba Corp スクロ−ル形圧縮機
JPH04303191A (ja) * 1991-03-29 1992-10-27 Toshiba Corp スクロール式圧縮機
JPH06341380A (ja) * 1993-04-14 1994-12-13 Daikin Ind Ltd スクロール流体機械
JP2007231960A (ja) * 2007-06-18 2007-09-13 Mitsubishi Electric Corp スクロール圧縮機

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