JP2013087678A - Scroll compressor - Google Patents

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Publication number
JP2013087678A
JP2013087678A JP2011228164A JP2011228164A JP2013087678A JP 2013087678 A JP2013087678 A JP 2013087678A JP 2011228164 A JP2011228164 A JP 2011228164A JP 2011228164 A JP2011228164 A JP 2011228164A JP 2013087678 A JP2013087678 A JP 2013087678A
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Japan
Prior art keywords
fixed
scroll
oil supply
oil
movable
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JP2011228164A
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Japanese (ja)
Inventor
Kenji Nagahara
顕治 永原
Kazuhiko Matsukawa
和彦 松川
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Daikin Industries Ltd
ダイキン工業株式会社
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Priority to JP2011228164A priority Critical patent/JP2013087678A/en
Publication of JP2013087678A publication Critical patent/JP2013087678A/en
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Abstract

An object of the present invention is to actively supply lubricating oil to a sliding portion of an Oldham joint to prevent troubles such as seizure and improve the reliability of a scroll compressor.
A high pressure oil introduction groove (35) is formed on a sliding contact surface of the fixed scroll (30) with the movable scroll (40). An intermittent oil supply recess (45) is formed on the sliding contact surface of the movable scroll (40) with the fixed scroll (30). The intermittent oil supply recess (45) moves between the oil supply position and the oil supply position while the drive shaft (60) rotates once. Here, the oil supply position is a position where the intermittent oil supply recess (45) communicates with the high pressure oil introduction groove (35) to receive the lubricating oil in the high pressure oil introduction groove (35), and the oil supply position is the intermittent oil supply recess. (45) is a position that communicates with the fixed-side keyway (36) and supplies lubricating oil into the fixed-side keyway (36).
[Selection] Figure 5

Description

  The present invention relates to a scroll compressor.
  Conventionally, scroll compressors having a fixed scroll and a movable scroll are known. A general scroll compressor is provided with an Oldham coupling to restrict the rotation of the movable scroll. The Oldham coupling is usually disposed between the movable scroll and the housing (see, for example, Patent Documents 1 and 2).
  In the scroll compressor described in Patent Document 1, a movable side key portion and a fixed side key portion are formed in the Oldham joint, and the movable side key portion is fitted into the key groove of the movable scroll, and the fixed side key portion is It fits into the keyway of the housing. Moreover, in the scroll compressor described in Patent Document 2, the movable side key portion is fitted in the key groove of the movable scroll, and the fixed side key portion is fitted in the key groove of the fixed scroll. Then, the rotation of the movable scroll is restricted when the key portion of the Oldham joint is in sliding contact with the side wall of the key groove.
  Here, in the scroll compressor described in Patent Document 1, since the key groove that fits into the Oldham joint is formed on the housing side, lubricating oil is introduced into the key groove, so Refueling is performed.
JP 07-279866 A Japanese Patent No. 4604008
  However, the scroll compressor described in Patent Document 2 has a structure in which the key groove that fits into the Oldham coupling is formed on the fixed scroll side, and therefore, lubrication is performed in the key groove as compared with the case where the key groove is formed on the housing side. Oil does not collect easily. For this reason, the oil supply amount and the oil supply position for the Oldham joint vary, and there is a problem that a sufficient amount of lubricating oil cannot be supplied to the sliding portion.
  The present invention has been made in view of such a point, and the object thereof is to positively supply lubricating oil to the sliding portion of the Oldham joint, and to prevent troubles such as seizure in advance. It is to improve reliability.
  The present invention includes a fixed scroll (30), a movable scroll (40) that forms a compression chamber (21) together with the fixed scroll (30), and the movable scroll (40) engaged with the movable scroll (40). A drive shaft (60) for rotating the drive shaft, a housing (50) for rotatably supporting the drive shaft (60), and the movable scroll disposed between the movable scroll (40) and the housing (50). The following solutions were taken for a scroll compressor equipped with an Oldham coupling (90) that regulates rotation of (40).
That is, in the first invention, the Oldham coupling (90) includes a ring portion (95) formed in a ring shape, and a movable side projecting from a surface of the ring portion (95) on the movable scroll (40) side. It has a key part (91) and a fixed side key part (93),
The movable scroll (40) is formed with a movable side keyway (46) into which the movable side key portion (91) is slidably fitted.
The fixed scroll (30) is formed with a fixed side keyway (36) into which the fixed side key portion (93) is slidably fitted.
A high pressure oil introduction groove (35) into which high pressure lubricating oil for lubricating the sliding contact surface is introduced is formed on the sliding contact surface of the fixed scroll (30) with the movable scroll (40),
The sliding surface of the movable scroll (40) that contacts the fixed scroll (30) communicates with the high pressure oil introduction groove (35) during one rotation of the drive shaft (60) and introduces the high pressure oil. It moves between an oil supply position for receiving the lubricating oil in the groove (35) and an oil supply position that communicates with the fixed-side key groove (36) and supplies the lubricating oil into the fixed-side key groove (36). An intermittent oil supply recess (45) is formed.
  In the first invention, the movable side key portion (91) of the Oldham coupling (90) is slidably fitted in the movable side keyway (46) of the movable scroll (40). The fixed side key portion (93) of the Oldham coupling (90) is slidably fitted in the fixed side keyway (36) of the fixed scroll (30). A high pressure oil introduction groove (35) is formed on the sliding contact surface of the fixed scroll (30) with the movable scroll (40). An intermittent oil supply recess (45) is formed on the sliding contact surface of the movable scroll (40) with the fixed scroll (30). The intermittent oil supply recess (45) moves between the oil supply position and the oil supply position while the drive shaft (60) rotates once. Here, the oil supply position is a position where the intermittent oil supply recess (45) communicates with the high pressure oil introduction groove (35) to receive the lubricating oil in the high pressure oil introduction groove (35), and the oil supply position is the intermittent oil supply recess. (45) is a position that communicates with the fixed-side keyway (36) and supplies lubricating oil into the fixed-side keyway (36).
  With such a configuration, lubricating oil can be actively supplied to the sliding portion of the Oldham joint (90), and troubles such as seizure can be prevented and the reliability of the scroll compressor can be improved. .
  Specifically, in the conventional scroll compressor, the lubricating oil stored in the fixed-side keyway (36) is merely supplied to the Oldham coupling (90) in a random manner. In the structure in which the fixed side keyway (36) is formed on the fixed scroll (30) side, the lubricating oil is difficult to accumulate in the fixed side keyway (36). There is a problem that the position varies and a sufficient amount of lubricating oil cannot be supplied to the sliding portion.
  On the other hand, in the present invention, the intermittent oil supply recess (45) is communicated with the high pressure oil introduction groove (35) in the oil replenishment position while the drive shaft (60) makes one rotation, and the inside of the high pressure oil introduction groove (35). In the oil supply position, the intermittent oil supply recess (45) is communicated with the fixed-side keyway (36) to supply oil into the fixed-side keyway (36). ) Can be actively supplied to the sliding portion.
  In addition, intermittent oil supply to the Oldham coupling (90) through the intermittent oil supply recess (45) provides a higher pressure than when the high-pressure oil introduction groove (35) communicates directly with the fixed-side key groove (36). It is possible to suppress the lubricant from leaking from the compression chamber (21) side to the intermediate pressure or low pressure side key groove (36) side, and to reduce the performance degradation.
  In addition, when refilling the Oldham joint (90) in a random manner, it is difficult to control the amount of oil supplied to the Oldham joint (90), but by appropriately setting the volume of the intermittent oil supply recess (45) The desired amount of oil supply can be ensured.
According to a second invention, in the first invention,
In the fixed scroll (30), an oil supply passage (38) communicating with the fixed-side key groove (36) is formed on the radially outer side than the high-pressure oil introduction groove (35),
The intermittent oil supply recess (45) communicates with the oil supply passage (38) at the oil supply position so as to supply lubricating oil into the fixed-side keyway (36) through the oil supply passage (38). It is comprised by these.
  In the second invention, an oil supply passage (38) is formed in the fixed scroll (30). The oil supply passage (38) is formed radially outside the high-pressure oil introduction groove (35) and communicates with the fixed-side key groove (36). The intermittent oil supply recess (45) communicates with the oil supply passage (38) at the oil supply position. As a result, the lubricating oil is supplied into the fixed-side key groove (36) through the oil supply passage (38).
  With such a configuration, the oil supply position for the Oldham coupling (90) can be appropriately set by forming the oil supply passage (38) in the fixed scroll (30). Thereby, lubricating oil can be reliably supplied with respect to the sliding part of Oldham coupling (90).
According to a third invention, in the second invention,
The oil supply passageway (38) extends upward from the sliding contact surface with the movable scroll (40) and then extends radially outward to open the fixed keyway (36) side. It is a feature.
  In the third aspect of the invention, the oil supply passage (38) extends upward from the sliding contact surface with the movable scroll (40) and then extends radially outward to open the fixed-side key groove (36) side. .
  With this configuration, lubricating oil can be ejected from the upper position in the fixed keyway (36) via the oil supply passage (38), and the sliding part of the Oldham coupling (90) can be lubricated over a wide range. can do.
According to a fourth invention, in the second invention,
An opening of the oil supply passage (38) on the fixed keyway (36) side is open to a position where oil can be supplied toward the sliding surface of the fixed key portion (93). Is.
  In the fourth invention, the opening on the fixed side key groove (36) side of the oil supply passage (38) is opened at a position where oil can be supplied toward the sliding surface of the fixed side key portion (93).
  With this configuration, the lubricating oil can be directly supplied toward the sliding surface of the fixed-side key portion (93), and the lubricating oil can be reliably supplied to the sliding portion of the Oldham coupling (90). can do.
  According to the present invention, during the rotation of the drive shaft (60), the intermittent oil supply recess (45) is communicated with the high pressure oil introduction groove (35) at the oil replenishment position to lubricate the high pressure oil introduction groove (35). Since the oil was received and the intermittent lubrication recess (45) was communicated with the fixed-side keyway (36) at the refueling position so that lubricating oil was supplied into the fixed-side keyway (36), the Oldham coupling (90) Lubricating oil can be positively supplied to the sliding portion. Thereby, troubles such as burn-in can be prevented and the reliability of the scroll compressor can be improved.
  In addition, intermittent oil supply to the Oldham coupling (90) through the intermittent oil supply recess (45) provides a higher pressure than when the high-pressure oil introduction groove (35) communicates directly with the fixed-side key groove (36). It is possible to suppress the lubricant from leaking from the compression chamber (21) side to the intermediate pressure or low pressure side key groove (36) side, and to reduce the performance degradation.
  In addition, when refilling the Oldham joint (90) in a random manner, it is difficult to control the amount of oil supplied to the Oldham joint (90), but by appropriately setting the volume of the intermittent oil supply recess (45) The desired amount of oil supply can be ensured.
It is a longitudinal section showing the whole scroll compressor concerning Embodiment 1 of the present invention. It is a top view which shows the structure of an Oldham coupling. It is a side view which shows the structure of an Oldham coupling. It is side surface sectional drawing which shows the state by which the intermittent oil supply recessed part was located in the oil supply position. It is side surface sectional drawing which shows the state by which the intermittent oil supply recessed part was located in the oil supply position. It is a plane sectional view showing the state where the intermittent oil supply recess is positioned at the oil supply position. FIG. 7 is a view corresponding to FIG. 6 of a scroll compressor according to the present modification. FIG. 6 is a view corresponding to FIG. 5 of the scroll compressor according to the second embodiment. FIG. 7 is a view corresponding to FIG. 6 of the scroll compressor according to the third embodiment.
  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.
Embodiment 1
FIG. 1 is a longitudinal sectional view showing the entire scroll compressor according to Embodiment 1 of the present invention. As shown in FIG. 1, the scroll compressor (10) of this embodiment is a so-called hermetic compressor. The scroll compressor (10) is connected to a refrigerant circuit that performs a refrigeration cycle, and sucks and compresses refrigerant in the refrigerant circuit.
<overall structure>
As shown in FIG. 1, in the scroll compressor (10), a compression mechanism (20), an electric motor (80), a lower bearing member (85), and a drive shaft (60) are provided in the internal space of the casing (15). And is housed. The casing (15) is a sealed container formed in a vertically long cylindrical shape. Further, the drive shaft (60) is arranged in such a posture that its axial direction is along the height direction of the casing (15). The detailed structure of the compression mechanism (20) will be described later.
  A suction pipe (16) and a discharge pipe (17) are attached to the casing (15). The suction pipe (16) and the discharge pipe (17) both penetrate the casing (15). The suction pipe (16) is connected to the compression mechanism (20). The discharge pipe (17) opens at a portion between the electric motor (80) and the compression mechanism (20) in the internal space of the casing (15).
  The lower bearing member (85) includes a central cylindrical portion (86) and an arm portion (87). The central cylindrical portion (86) is substantially cylindrical. The arm portion (87) extends outward from the outer peripheral surface of the central cylindrical portion (86) and is fixed to the casing (15). A bearing metal (88) is inserted into the upper end portion of the central cylindrical portion (86). The lower end portion of the main shaft portion (61) of the drive shaft (60) is inserted into the bearing metal (88), and the drive shaft (60) is rotatably supported.
  The electric motor (80) includes a stator (81) fixed to the inner peripheral surface of the casing (15), and a rotor (82) disposed inside the stator (81). The rotor (82) is fixed to the drive shaft (60) through the main shaft portion (61) of the drive shaft (60).
  The drive shaft (60) is provided with a main shaft portion (61), a balance weight portion (62), and an eccentric portion (63). The balance weight part (62) is disposed in the middle of the main shaft part (61) in the axial direction. The main shaft portion (61) has a lower portion than the balance weight portion (62) passing through the rotor (82) of the electric motor (80).
  The eccentric part (63) is formed in a cylindrical shape having a smaller diameter than the main shaft part (61), and projects from the upper end surface of the main shaft part (61). The shaft center of the eccentric portion (63) is parallel to the shaft center of the main shaft portion (61) and is eccentric with respect to the shaft center of the main shaft portion (61). The eccentric part (63) is engaged with the bearing metal (53) of the central bulge part (52) of the housing (50) described later.
  An in-shaft oil supply passage (70) is formed in the drive shaft (60). The in-shaft oil supply passage (70) extends along the axis of the drive shaft (60), one end of which is at the lower end of the main shaft portion (61) and the other end is at the upper end surface of the eccentric portion (63). It is open. In the middle of the in-shaft oil supply passage (70), a branch passage that extends outward in the radial direction of the drive shaft (60) and supplies lubricating oil to the sliding portions of the lower bearing member (85) and the compression mechanism (20) (71) is formed.
  Lubricating oil is stored at the bottom of the casing (15). When the drive shaft (60) rotates, the lubricating oil accumulated at the bottom of the casing (15) is sucked up into the in-shaft oil supply passage (70). The lubricating oil flowing through the in-shaft oil supply passage (70) is supplied to the sliding portion of the lower bearing member (85) and the compression mechanism (20) through the branch passage (71).
<Configuration of compression mechanism>
The compression mechanism (20) includes a housing (50), a fixed scroll (30), a movable scroll (40), and an Oldham coupling (90). In the compression mechanism (20), a compression chamber (21) is formed by the fixed scroll (30) and the movable scroll (40). The Oldham coupling (90) is a member for restricting the rotation of the movable scroll (40).
  The housing (50) is formed in a thick disk shape, and its outer peripheral edge is fixed to the inner peripheral surface of the casing (15). A central concave portion (51) and an annular convex portion (54) are formed in the central portion of the housing (50). The central recess (51) is a cylindrical recess that opens in the upper surface of the housing (50). The annular convex part (54) is formed along the outer periphery of the central concave part (51) and protrudes from the upper surface of the housing (50).
  A central bulge portion (52) is formed in the housing (50). The central bulging portion (52) is located below the central concave portion (51) and bulges downward. A through-hole penetrating the central bulge portion (52) vertically is formed in the central bulge portion (52), and a bearing metal (53) is inserted into the through-hole. The main shaft portion (61) of the drive shaft (60) is inserted through the bearing metal (53) of the central bulge portion (52). The outer portion of the annular convex portion (54) on the upper surface of the housing (50) is a flat surface. This flat surface is in sliding contact with the Oldham coupling (90).
  A fixed scroll (30) and a movable scroll (40) are placed on the upper surface of the housing (50). The fixed scroll (30) is fixed to the housing (50) by bolts or the like. On the other hand, the movable scroll (40) is driven by the drive shaft (60) to perform a revolving motion.
  The movable scroll (40) is a member in which a movable side end plate portion (41), a movable side wrap (42), and a cylindrical portion (43) are integrally formed. The movable side end plate portion (41) is formed in a disc shape. The movable side wrap (42) is formed in the shape of a spiral wall, and projects from the upper surface of the movable side end plate part (41). The cylindrical portion (43) is formed in a cylindrical shape, and protrudes from the lower surface of the movable side end plate portion (41). The cylindrical portion (43) is inserted into the central recess (51) of the housing (50) from above. A bearing metal (44) is inserted into the cylindrical portion (43). The eccentric part (63) of the drive shaft (60) is inserted into the bearing metal (44) of the cylindrical part (43) from below. The back surface of the movable side end plate portion (41) of the movable scroll (40) is in sliding contact with a seal ring (58) provided on the protruding end surface of the annular convex portion (54) of the housing (50).
  The movable scroll (40) is formed with a movable side keyway (46) that opens on the lower surface of the movable side end plate (41). The movable key groove (46) is an elongated groove extending along a direction orthogonal to the central axis of the eccentric part (63) of the drive shaft (60). In the movable scroll (40), the lower surface of the movable side end plate portion (41) is in sliding contact with the Oldham coupling (90).
  Here, it was surrounded by the ring part (95) of the Oldham coupling (90), the movable side end plate part (41) of the movable scroll (40), the annular convex part (54) and the flat surface of the housing (50). The space is an oil sump space (24).
  Lubricating oil that has been used to lubricate the eccentric portion (63) and has flowed into the central recess (51) flows into the oil sump space (24). Specifically, the lubricating oil in the central recess (51) leaks into the oil sump space (24) from the gap between the movable side end plate part (41) of the movable scroll (40) and the seal ring (58), and the oil sump space (24). The lubricating oil stored in the oil sump space (24) enters the movable side key groove (46) and lubricates the sliding surfaces of the movable side key portion (91) and the movable side key groove (46).
  The fixed scroll (30) is a member in which a fixed side end plate portion (31), a fixed side wrap (32), and an outer peripheral portion (33) are integrally formed. The fixed side end plate portion (31) is formed in a disc shape. The fixed side wrap (32) is formed in a spiral wall shape, and protrudes from the lower surface of the fixed side end plate part (31). The outer peripheral portion (33) is formed in a thick ring shape extending downward from the outer peripheral portion (33) of the fixed-side end plate portion (31) and surrounds the fixed-side wrap (32).
  A discharge port (22) is formed in the fixed side end plate portion (31). The discharge port (22) is a through hole formed in the vicinity of the center of the fixed-side end plate portion (31), and passes through the fixed-side end plate portion (31) in the thickness direction. A suction pipe (16) is inserted in the vicinity of the outer periphery of the fixed-side end plate part (31).
  A discharge gas passage (23) is formed in the compression mechanism (20). The start end of the discharge gas passage (23) communicates with the discharge port (22). Although not shown, the discharge gas passage (23) is formed from the fixed scroll (30) to the housing (50), and the other end opens to the lower surface of the housing (50).
  In the compression mechanism (20), the fixed scroll (30) and the movable scroll (40) are arranged such that the lower surface of the fixed side end plate portion (31) and the upper surface of the movable side end plate portion (41) face each other, and the fixed side wrap (32) The movable wraps (42) are arranged so as to mesh with each other. In the compression mechanism (20), the fixed wrap (32) and the movable wrap (42) mesh with each other to form a plurality of compression chambers (21).
  FIG. 2 is a plan view showing the configuration of the Oldham coupling, and FIG. 3 is a side view. As shown in FIGS. 2 and 3, the Oldham coupling (90) includes one ring portion (95), two movable side key portions (91), and two fixed side key portions (93). Yes. The thickness of the ring portion (95) is constant over the entire circumference of the ring portion (95). The upper surface of the ring portion (95) is in sliding contact with the lower surface of the movable side end plate portion (41) of the movable scroll (40). On the other hand, the lower surface of the ring portion (95) is in sliding contact with the flat surface outside the annular convex portion (54) on the upper surface of the housing (50).
  The ring portion (95) is formed with four portions protruding outward in the radial direction, and one movable side key portion (91) and one fixed side key portion (93) project from the portion. ing. The movable side key part (91) and the fixed side key part (93) are alternately arranged at 90 ° intervals in the circumferential direction of the ring part (95). The movable side key portion (91) and the fixed side key portion (93) are generally rectangular parallelepiped protrusions, and protrude from the upper surface of the ring portion (95).
  As shown in FIG. 4, a fixed side keyway (36) is formed on the lower surface of the outer peripheral portion (33) of the fixed scroll (30). The fixed side key portion (93) is fitted into the fixed side key groove (36). The width of the fixed side key portion (93) is slightly narrower than the width of the fixed side key groove (36).
  A high pressure oil introduction groove (35) into which high pressure lubricating oil is introduced is formed on the lower surface of the outer peripheral portion (33) of the fixed scroll (30) (that is, the sliding contact surface with the movable scroll (40)). . Specifically, the high pressure oil introduction groove (35) extends along the inner peripheral edge of the outer peripheral portion (33) of the fixed scroll (30).
  An intermittent oil supply recess (45) is formed on the upper surface of the movable side end plate (41) of the movable scroll (40) (that is, the sliding contact surface with the fixed scroll (30)). The intermittent oil supply recess (45) communicates with the high pressure oil introduction groove (35) and receives the lubricating oil in the high pressure oil introduction groove (35) while the drive shaft (60) rotates once (see FIG. 4). ) And an oil supply position (position in FIG. 5) that communicates with the fixed-side key groove (36) and supplies lubricating oil into the fixed-side key groove (36).
  That is, the intermittent oil supply recess (45) receives the lubricating oil in the high pressure oil introduction groove (35) at the oil supply position and then communicates with the fixed-side key groove (36) at the oil supply position. The lubricating oil inside is injected into the fixed side keyway (36). Thereby, lubricating oil can be actively supplied with respect to the sliding part of Oldham coupling (90).
-Driving action-
Next, the operation of the scroll compressor (10) will be described with reference to FIG. In the scroll compressor (10), when the electric motor (80) is energized, the movable scroll (40) is driven by the drive shaft (60). The orbiting scroll (40) has its rotation motion restricted by the Oldham coupling (90), and does not rotate but only revolves.
  When the orbiting scroll (40) revolves, the low-pressure gas refrigerant that has flowed into the compression mechanism (20) through the suction pipe (16) becomes the outer peripheral side of the fixed side wrap (32) and the movable side wrap (42). It is sucked into the compression chamber (21) from near the end. When the movable scroll (40) further moves, the compression chamber (21) is closed from the suction pipe (16), and thereafter, the compression chamber (21) is separated from the fixed side wrap (32) and the movable side wrap ( 42) and move toward the inner circumferential edge. In the process, the volume of the compression chamber (21) gradually decreases, and the gas refrigerant in the compression chamber (21) is compressed.
  As the volume of the compression chamber (21) gradually decreases as the movable scroll (40) moves, the compression chamber (21) eventually communicates with the discharge port (22). Then, the refrigerant compressed in the compression chamber (21) (that is, high-pressure gas refrigerant) flows into the discharge gas passage (23) through the discharge port (22), and then the internal space of the casing (15). Is discharged to a portion between the compression mechanism (20) and the electric motor (80). The high-pressure gas refrigerant discharged into the internal space of the casing (15) flows out of the casing (15) through the discharge pipe (17).
  Lubricating oil is stored in the internal space of the casing (15). The pressure of the lubricating oil stored in the casing (15) is substantially equal to the pressure of the gas refrigerant discharged from the compression mechanism (20). During the operation of the scroll compressor (10), the drive shaft (60) rotates, and the lubricating oil stored at the bottom of the casing (15) is sucked into the in-shaft oil supply passage (70). Part of the lubricating oil flowing through the in-shaft oil supply passage (70) flows into the branch passage (71), and the rest flows out from the upper end of the in-shaft oil supply passage (70).
−Oldham joint lubrication−
The sliding surface of the movable key part (91) is lubricated by the lubricating oil stored in the oil sump space (24). Specifically, the lubricating oil used for lubricating the eccentric part (63) flows into the central recess (51) of the housing (50). Lubricating oil in the central recess (51) leaks into the oil sump space (24) from the gap between the movable side end plate (41) of the movable scroll (40) and the seal ring (58). Lubricating oil stored in the oil sump space (24) is supplied to the sliding surface between the movable side key portion (91) and the movable side key groove (46), and the movable side key portion (91) of the Oldham coupling (90) is supplied. ) Is lubricated.
  Next, the operation | movement which lubricates the sliding surface of a fixed side key part (93) is demonstrated, referring FIGS. 4-6. As shown in FIG. 4, the fixed-side key portion (93) of the Oldham coupling (90) is fitted in the fixed-side key groove (36) of the fixed scroll (30). The position of the Oldham coupling (90) shown in FIG. 4 is an oil supply position for supplying lubricating oil to the intermittent oil supply recess (45) of the movable scroll (40), and the intermittent oil supply recess (45) of the movable scroll (40) is The fixed scroll (30) communicates with the high pressure oil introduction groove (35).
  When the drive shaft (60) rotates, the movable scroll (40) performs a revolving motion. At this time, the intermittent oil supply recess (45) moves along a trajectory indicated by a virtual line in FIG. When the movable scroll (40) moves to the oil supply position shown in FIGS. 5 and 6, the intermittent oil supply recess (45) communicates with the fixed-side key groove (36). As a result, the lubricating oil in the intermittent oil supply recess (45) is jetted into the fixed-side keyway (36), and the sliding part of the Oldham coupling (90), that is, the fixed-side key part (93) and the fixed-side key Oil is supplied to the sliding surface with the groove (36).
  Thus, the oil supply operation for receiving the lubricating oil in the high pressure oil introduction groove (35) by the intermittent oil supply recess (45) and the intermittent oil supply recess (45) on the fixed side while the drive shaft (60) rotates once. An oil supply operation is performed in which the lubricating oil in the intermittent oil supply recess (45) is ejected into the fixed-side key groove (36) in communication with the key groove (36).
-Effect of Embodiment 1-
As described above, according to the scroll compressor (10) according to the first embodiment, the intermittent oil supply recess (45) is formed in the high-pressure oil introduction groove (35 at the oil supply position while the drive shaft (60) rotates once. ) To receive the lubricating oil in the high pressure oil introduction groove (35), and lubricate the fixed key groove (36) with the intermittent oil recess (45) in communication with the fixed key groove (36) at the oiling position. Since the oil is supplied, the lubricating oil can be positively supplied to the sliding portion of the Oldham joint (90). Thereby, troubles such as burn-in can be prevented and the reliability of the scroll compressor can be improved.
  In addition, intermittent oil supply to the Oldham coupling (90) through the intermittent oil supply recess (45) provides a higher pressure than when the high-pressure oil introduction groove (35) communicates directly with the fixed-side key groove (36). It is possible to suppress the lubricant from leaking from the compression chamber (21) side to the intermediate pressure or low pressure side key groove (36) side, and to reduce the performance degradation.
<Modification>
FIG. 7 is a view corresponding to FIG. 6 of the scroll compressor according to the present modification. As shown in FIG. 7, the intermittent oil supply recess (45) of the movable scroll (40) is formed in an elliptical shape. That is, the volume of the intermittent oil supply recess (45) is larger than when the intermittent oil supply recess (45) is formed in a circular shape as in the first embodiment.
  With such a configuration, by appropriately setting the volume of the intermittent oil supply recess (45), the amount of oil supplied to the Oldham joint (90) can be controlled to ensure a desired amount of oil supply.
  In addition, in this modification, although the form which made the shape of the intermittent oil supply recessed part (45) the ellipse shape was demonstrated, it is not limited to this form. For example, various forms can be applied to the shape of the intermittent oil supply recess (45) such as an oval shape or a rectangular shape.
<< Embodiment 2 >>
FIG. 8 is a view corresponding to FIG. 5 of the scroll compressor according to the second embodiment. Since the difference from the first embodiment is that the oil supply passageway (38) is provided in the fixed scroll (30), the same parts as those in the first embodiment are denoted by the same reference numerals, and only the differences will be described. .
  As shown in FIG. 8, in the outer peripheral portion (33) of the fixed scroll (30), an oil supply passage (38) communicated with the fixed-side key groove (36) on the outer side in the radial direction from the high-pressure oil introduction groove (35). Is formed. The oil supply passageway (38) extends upward from the sliding contact surface with the movable scroll (40) and then extends radially outward to open to the fixed-side key groove (36) side.
  The intermittent oil supply recess (45) communicates with the high pressure oil introduction groove (35) at the oil supply position, and communicates with the oil supply passage (38) at the oil supply position. That is, while the drive shaft (60) rotates once, the oil supply operation for receiving the lubricating oil in the high-pressure oil introduction groove (35) by the intermittent oil supply recess (45) and the intermittent oil supply recess (45) is provided by the oil supply passage (38 ), And the lubricating oil in the intermittent oil supply recess (45) is injected into the fixed keyway (36) through the oil supply passage (38).
  With this configuration, lubricating oil can be ejected from the upper position in the fixed keyway (36) via the oil supply passage (38), and the sliding part of the Oldham coupling (90) can be lubricated over a wide range. can do.
<< Embodiment 3 >>
FIG. 9 is a view corresponding to FIG. 6 of the scroll compressor according to the third embodiment. As shown in FIG. 9, the fixed scroll (30) has an oil supply passage (38) communicating with the fixed-side key groove (36) on the radially outer side of the high-pressure oil introduction groove (35). The oil supply passage (38) extends radially outward after extending upward from the sliding contact surface with the movable scroll (40). Here, the opening on the fixed-side key groove (36) side of the oil supply passage (38) opens on the side wall surface of the fixed-side key groove (36). That is, the lubricating oil that has passed through the oil supply passage (38) is supplied toward the side wall surface of the fixed-side key portion (93). The intermittent oil supply recess (45) communicates with the high pressure oil introduction groove (35) at the oil supply position, and communicates with the oil supply passage (38) at the oil supply position. That is, while the drive shaft (60) rotates once, the oil supply operation for receiving the lubricating oil in the high-pressure oil introduction groove (35) by the intermittent oil supply recess (45) and the intermittent oil supply recess (45) is provided by the oil supply passage (38 ), And the lubricating oil in the intermittent oil supply recess (45) is ejected to the side wall surface of the fixed key part (93) through the oil supply passage (38).
  With this configuration, the lubricating oil can be directly supplied toward the sliding surface of the fixed-side key portion (93), and the lubricating oil can be reliably supplied to the sliding portion of the Oldham coupling (90). can do.
  As described above, the present invention can positively supply lubricating oil to the sliding part of the Oldham joint, thereby preventing troubles such as seizure and improving the reliability of the scroll compressor. Since a highly practical effect can be obtained, it is extremely useful and has high industrial applicability.
10 Scroll compressor
21 Compression chamber
30 Fixed scroll
35 High-pressure oil introduction groove
36 Oil supply passage
40 movable scroll
45 Intermittent lubrication recess
46 Movable keyway
50 housing
56 Key groove on the fixed side
60 Drive shaft
90 Oldham fitting
91 Movable side key
93 Fixed key part
95 Ring part

Claims (4)

  1. A fixed scroll (30), a movable scroll (40) that forms a compression chamber (21) together with the fixed scroll (30), and engages with the movable scroll (40) to rotate the movable scroll (40). A drive shaft (60); a housing (50) rotatably supporting the drive shaft (60); and the movable scroll (40) disposed between the housing (50) and the movable scroll (40). A scroll compressor having an Oldham coupling (90) that regulates rotation,
    The Oldham coupling (90) includes a ring portion (95) formed in a ring shape, a movable side key portion (91) protruding from the surface of the ring portion (95) on the movable scroll (40) side, and a fixed side With key part (93),
    The movable scroll (40) is formed with a movable side keyway (46) into which the movable side key portion (91) is slidably fitted.
    The fixed scroll (30) is formed with a fixed side keyway (36) into which the fixed side key portion (93) is slidably fitted.
    A high pressure oil introduction groove (35) into which high pressure lubricating oil for lubricating the sliding contact surface is introduced is formed on the sliding contact surface of the fixed scroll (30) with the movable scroll (40),
    The sliding surface of the movable scroll (40) that contacts the fixed scroll (30) communicates with the high pressure oil introduction groove (35) during one rotation of the drive shaft (60) and introduces the high pressure oil. It moves between an oil supply position for receiving the lubricating oil in the groove (35) and an oil supply position that communicates with the fixed-side key groove (36) and supplies the lubricating oil into the fixed-side key groove (36). A scroll compressor characterized in that an intermittent oil supply recess (45) is formed.
  2. In claim 1,
    In the fixed scroll (30), an oil supply passage (38) communicating with the fixed-side key groove (36) is formed on the radially outer side than the high-pressure oil introduction groove (35),
    The intermittent oil supply recess (45) communicates with the oil supply passage (38) at the oil supply position so as to supply lubricating oil into the fixed-side keyway (36) through the oil supply passage (38). The scroll compressor characterized by being comprised in this.
  3. In claim 2,
    The oil supply passageway (38) extends upward from the sliding contact surface with the movable scroll (40) and then extends radially outward to open the fixed keyway (36) side. A featured scroll compressor.
  4. In claim 2,
    An opening of the oil supply passage (38) on the fixed keyway (36) side is open to a position where oil can be supplied toward the sliding surface of the fixed key portion (93). Scroll compressor.
JP2011228164A 2011-10-17 2011-10-17 Scroll compressor Pending JP2013087678A (en)

Priority Applications (1)

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JP2011228164A JP2013087678A (en) 2011-10-17 2011-10-17 Scroll compressor

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JP2011228164A JP2013087678A (en) 2011-10-17 2011-10-17 Scroll compressor

Publications (1)

Publication Number Publication Date
JP2013087678A true JP2013087678A (en) 2013-05-13

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Family Applications (1)

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020174885A1 (en) * 2019-02-28 2020-09-03 ダイキン工業株式会社 Scroll compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020174885A1 (en) * 2019-02-28 2020-09-03 ダイキン工業株式会社 Scroll compressor

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