JP3788380B2 - Rotary compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a rotary compressor, and particularly relates to a seal structure between a high pressure space and a low pressure space in a casing.
[0002]
[Prior art]
  Conventionally, rotary compressors equipped with various types of compression mechanisms such as a scroll type, a swing type, or a rolling piston type (rotary type) are disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-97183. It is used to compress refrigerant gas in a refrigeration apparatus that performs a refrigeration cycle such as a harmony apparatus. The rotary compressor has a built-in compressor motor, and the compressor mechanism of each type is driven by using the compressor motor as a drive source.
[0003]
  Here, a schematic structure of a conventional rotary compressor will be described by taking a scroll compressor (100) shown in FIG. 10 as an example.
[0004]
  The scroll compressor (100) includes a casing (101), a compressor motor (102), and a compression mechanism (103). The casing (101) is composed of a cylindrical body (104) and end plates (105, 106) fixed to upper and lower ends thereof. The compressor motor (102) includes a stator (107) fixed to the body portion (104), and a rotor (108) disposed on the inner peripheral side of the stator (107). 109) are consolidated.
[0005]
  The compression mechanism (103) includes a fixed scroll, a movable scroll, and a housing (not shown), and the housing is fixed to the casing (the fixed scroll may be fixed to the casing). The drive shaft (109) protrudes up and down from the stator (107) and the rotor (108), and its upper end is connected to the movable scroll, and its lower end is connected to the casing (110) via the bearing member (110). 101). The compression mechanism (103) performs the operation of sucking, compressing and discharging the refrigerant gas by changing the volume of the compression chamber by the operation of the movable scroll accompanying the rotation of the drive shaft (109).
[0006]
  In the scroll compressor (100), the housing of the compression mechanism is fitted into the casing (101) at the outer peripheral portion thereof, so that separate spaces are partitioned on the upper side and the lower side of the compression mechanism (103). In the illustrated example, the lower space is a high-pressure space and the upper space is a low-pressure space, and both spaces are sealed at a joint (111) between the casing (101) and the housing. In this configuration, the housing functions as a partition member.
[0007]
[Problems to be solved by the invention]
  In a conventional scroll compressor, the housing is generally fixed to the casing by shrink fitting, as described in, for example, Japanese Patent Application Laid-Open No. 11-22661. However, in the configuration in which shrink fitting is performed, it is possible to obtain sufficient sealing performance, but there is a problem in workability at the time of product assembly.
[0008]
  On the other hand, a structure in which the housing is fixed by simply press-fitting into the casing is also conceivable. In this case, although the workability is improved as compared with the shrink-fitting type, the sealing performance is lowered and the refrigerant is transferred from the high-pressure space to the low-pressure space. May leak. In addition, if a dedicated seal member is used to improve the sealing performance, the cost increases.
[0009]
  The present invention has been made in view of such problems, and the object of the present invention is, in a rotary compressor, workability at the time of assembly of the compressor, high pressure space and low pressure space in the casing. It is to improve both the sealing performance between the two and prevent the cost increase.
[0010]
[Means for Solving the Problems]
  The present invention provides welding of the body (11) of the casing (10) and the end plate (12) to the outer peripheral surface (40) of the partition member (23) that partitions the inside of the casing (10) into a high-pressure space and a low-pressure space. A circumferential groove (42) allowing the contraction of the casing (10) is provided at a location, and the partition member (23) is strongly tightened using the contraction.
[0011]
  Specifically, the invention described in claim 1 includes a compressor motor (30), a compression mechanism (20) driven by the compressor motor (30), and a casing (10) in the casing (10). A partition member (23) for partitioning the inside into a high-pressure space and a low-pressure space, and a casing (10) having a cylindrical body (11) and an end plate (12) fixed to the body (11) by welding Is assumed to be a rotary compressor.
[0012]
  The rotary compressor is configured such that the partition member (23) is press-fitted into the casing (10) at or near the welded portion between the body (11) and the end plate (12).And projecting outward in the radial direction (11) The buttocks that contact the end face of (41) The above-mentioned end plate (12) But the above buttocks (41) End of Abutting against the surface and the body (11) And buttocks (41) Is configured to have a clearance fit in the radial direction,A circumferential groove continuous in the circumferential direction on the outer peripheral surface (40) of the partition member (23) so as to allow shrinkage of the casing (10) due to welding at the welded portion of the body (11) and the end plate (12). (42) is formed.
[0013]
  The “partition member (23)” in this configuration may be a member to which a fixed scroll is attached in the case of a scroll compressor, or may be a fixed scroll itself. Further, the partition member (23) may be a member that partitions the inside of the casing into a high-pressure space and a low-pressure space even in the case of a rotary compressor or a swing compressor.
[0014]
  In the first aspect of the present invention, the body (11) and the end plate are fitted in a state in which the partition member (23) is press-fitted into the casing (10) (the body (11) or the end plate (12)). When (12) is welded, the casing (10) contracts in the circumferential groove (42) of the outer peripheral surface (40) of the partition member (23) by the welding. Therefore, even if the partition member (23) is simply press-fitted into the casing (10) before welding, the casing (10) strongly tightens the partition member (23) in the vicinity of the circumferential groove (42) after welding. Therefore, it becomes possible to obtain a sealing property equivalent to that of shrink fitting.
[0015]
  Moreover, the partition member (twenty three) Projecting outward in the radial direction (11) The buttocks that contact the end face of (41) The above-mentioned end plate (12) But the above buttocks (41) And abutting against the end surface of the body (11) And buttocks (41) Because it is configured to have a clearance fit in the radial direction against the end plate (12) The casing (Ten) While easily positioning in the axial direction against the end plate (12) And torso (11) By welding the partition member (twenty three) Has casing (Ten) It is fixed easily and securely.
[0016]
  In the rotary compressor according to claim 1, in the rotary compressor according to claim 1, the outer peripheral surface (40) of the partition member (23) is circumferentially positioned at a position close to the circumferential groove (42). A continuous protrusion (45) (46, 47) is formed, and the protrusion (45) (46, 47) is configured to be press-fitted into the casing (10).
[0017]
  With this configuration, the protrusions (45) (46, 47) formed on the outer peripheral surface (40) of the partition member (23) are press-fitted into the casing (10) (the trunk (11) or the end plate (12)). In this state, by welding the barrel (11) and the end plate (12), the allowance for press-fitting the projections (45) (46, 47) to the barrel (11) or the end plate (12) is larger. The same effect as that is achieved, and the sealing performance is improved.
[0018]
  According to a third aspect of the present invention, in the case where the outer peripheral surface (40) of the partition member (23) is a clearance fit in the body (11) or the end plate (12) of the casing (10), the partition member ( A peripheral groove (42) and projections (45) (46, 47) are formed on the outer peripheral surface (40) of 23).
[0019]
  That is, the present invention is configured such that the partition member (23) is loosely fitted to the casing (10) at or near the welded portion of the body (11) and the end plate (12).And projecting outward in the radial direction (11) The buttocks that contact the end face of (41) The above-mentioned end plate (12) Is the above buttocks (41) And abutting against the end surface of the body (11) And buttocks (41) Is configured to have a clearance fit in the radial direction,On the outer peripheral surface (40) of the partition member (23), a circumferential groove continuous in the circumferential direction so as to allow shrinkage of the casing (10) due to welding at the welded portion of the body (11) and the end plate (12). (42) and projections (45) (46, 47) continuous in the circumferential direction at positions close to the circumferential groove (42), and the projections (45) (46, 47) are formed in the casing ( It is characterized by being configured to be press-fitted into 10).
[0020]
  In the invention according to claim 3, the partition member (23) is press-fitted into the body (11) or the end plate (12) of the casing (10) only at the projections (45) (46, 47). When the body part (11) and the end plate (12) are welded in this state, the casing (10) contracts at the position of the circumferential groove (42), so that the tightening force is increased. Therefore, even with this configuration, it is possible to obtain a sealing performance equivalent to that of shrink fitting.
[0021]
  The invention according to claim 4 is characterized in that, in the rotary compressor according to claim 2 or 3, the protrusions (46, 47) of the partition member (23) are provided at a plurality of locations. Yes.
[0022]
  With this configuration, the protrusions (46, 47) continuous in the circumferential direction on the outer peripheral surface (40) of the partition member (23) are arranged in multiple in the axial direction of the partition member (23). The sealing performance is improved by increasing the press-fitting locations of the protrusions (46, 47) with respect to the body (11) or the end plate (12).
[0023]
  The invention as set forth in claim 5 is characterized in that, in the rotary compressor according to claim 4, the protruding heights of the plurality of protrusions (46, 47) are different from each other.
[0024]
  With this configuration, for example, the protrusion height of the protrusions (46, 47) on the front side in the press-fitting direction of the partition member (23) with respect to the body (11) or the end plate (12) is reduced, and the rear side in the press-fitting direction is reduced. The protruding height of the protrusions (46, 47) can be increased. By doing so, the partition member (23) can be relatively easily press-fitted into the casing (10), and the sealing performance is not deteriorated.
[0025]
  The invention according to claim 6 is the rotary compressor according to any one of claims 2 to 5, wherein one end of the partition member (23) in the projecting portion (45) (46, 47) in the axial direction is provided. Alternatively, both ends (45a, 45b) are formed on tapered surfaces.
[0026]
  According to the sixth aspect of the invention, of the end portions of the protrusions (45), (46, 47), the front side in the press-fitting direction of the partition member (23) with respect to the body portion (11) or the end plate (12) is a tapered surface ( When formed in 45a), the partition member (23) can be easily pressed into the casing (10). Further, when the rear side in the press-fitting direction is formed on the tapered surface (45b) among the ends of the protrusions (45) (46, 47), the casing is formed at the welded portion between the body (11) and the end plate (12). When (10) contracts along the tapered surface (45b), the contracted portion is easily pressed against the tapered surface (45b). Therefore, if the casing (10) and the protrusions (45) (46, 47) are not in sufficient pressure contact, the sealing performance may be reduced. Will improve.
[0027]
  The invention according to claim 7 is the rotary compressor according to any one of claims 2 to 6, wherein the partition member (23) has a thick wall portion (43) and a thin wall wall having different thicknesses in the radial direction. And a protrusion (45) (46, 47) is formed on the outer periphery of the thick part (43). In this configuration, the thick portion (43) is a portion where the diameter is thick throughout, and the thin portion (44) is a portion including a thin portion in at least a part of the whole.
[0028]
  When the protrusions (45), (46, 47) are formed on the outer periphery of the thick part (43) of the partition member (23) in this way, the casing (10) strongly tightens the partition member (23) by shrinkage due to welding. On the other hand, it is possible to resist the tightening force by the rigidity of the thick portion (43). For this reason, it is possible to prevent the partition member (23) from being deformed.
[0029]
  Further, the invention according to claim 8 isIn the rotary compressor having the same configuration as that of claim 1, the partition member (twenty three) Is the torso (11) And end plate (12) Casing at or near the weld point (Ten) The partition member is configured to be press-fitted into (twenty three) Outer peripheral surface (40) The above body (11) And end plate (12) Casing by welding in the welding part of (Ten) Circumferential groove that continues in the circumferential direction to allow shrinkage (42) The partition member is formed (twenty three) Outer peripheral surface (40) In the circumferential groove (42) Protrusion that continues in the circumferential direction at a position close to (45) (46,47) The protrusion is formed (45) (46,47) But the casing (Ten) The partition member is configured to be press-fitted into (twenty three) Protrusions (46,47) Are provided at a plurality of locations, and a plurality of protrusions (46,47) The protrusion heights of the two are different from each other.
[0030]
  The invention according to claim 9 is the rotary compressor having the same configuration as that of claim 1 in the premise of the partition member. (twenty three) Is the torso (11) And end plate (12) Casing at or near the weld point (Ten) The partition member is configured to have a clearance fit (twenty three) Outer peripheral surface (40) The above body (11) And end plate (12) Casing by welding in the welding part of (Ten) Circumferential groove that continues in the circumferential direction to allow shrinkage (42) And the circumferential groove (42) Protrusion that continues in the circumferential direction at a position close to (45) (46,47) And the protrusion is formed (45) (46,47) But the casing (Ten) The partition member is configured to be press-fitted into (twenty three) Protrusions (46,47) Are provided at a plurality of locations, and a plurality of protrusions (46,47) The protrusion heights of the two are different from each other.
[0031]
  The invention according to claim 10 is the rotary compressor according to claim 8 or 9, wherein (45) (46,47) Is a partition member (twenty three) One or both ends in the axial direction (45a, 45b) Is formed on a tapered surface.
[0032]
  The invention according to claim 11 is the rotary compressor according to any one of claims 8 to 10, wherein the partition member (twenty three) Thick part with different thickness in the radial direction (43) And thin part (44) And a protrusion (45) (46,47) Is the thick part (43) It is characterized in that it is formed on the outer periphery.
[0033]
  The invention according to claim 12 is the rotary compressor according to any one of claims 8 to 11, wherein the casing is a casing. (Ten) End plate (12) The torso (11) Or partition member (twenty three) While abutting in the axial direction against the body (11) Or partition member (twenty three) It is characterized by being comprised so that it may become a clearance fit.
[0034]
With this configuration, the end plate (12) The casing (Ten) While easily positioning in the axial direction against the end plate (12) And torso (11) By welding the partition member (twenty three) Has casing (Ten) It is fixed easily and securely.
[0035]
  The invention according to claim 13 is the rotary compressor according to any one of claims 1 to 12, wherein the compression mechanism (20) Scroll type compression mechanism (20) The partition member (twenty three) But fixed scrolling (twenty one) It is a member to be fixed.
[0036]
  On the other hand, in the scroll compressor, when the fixed scroll (21) itself is fixed as a partition member (23) to the casing (10) by shrink fitting or the like, the relationship between the strength of the fixed scroll (21) and the tightening force. Depending on the situation, the fixed scroll (21) may be deformed and the performance of the compressor may be reduced.In this invention, the partition member (23) separate from the fixed scroll (21) is fixed to the casing (10). Therefore, the tightening force does not act on the spiral portion of the fixed scroll (21), and the performance of the compressor does not deteriorate.
[0037]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
  Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.
[0038]
  The present embodiment relates to a scroll compressor. First, the overall configuration of the scroll compressor will be described with reference to FIG.
[0039]
  This scroll compressor (1) is used to compress a low-pressure refrigerant sucked from the evaporator side and discharge it to the condenser side in a refrigerant circuit that performs a vapor compression refrigeration cycle such as an air conditioner. It is done. As shown in FIG. 1, the scroll compressor (1) includes a compression mechanism (20) in a casing (10) and a compressor motor (30) that is a drive mechanism for driving the compression mechanism (20). ). The compression mechanism (20) is arranged at the upper part in the casing (10), and the compressor motor (30) is arranged at a position slightly below the central part in the casing (10). The casing (10) is provided with a connector terminal (35) for supplying power to the compressor motor (30).
[0040]
  The casing (10) includes a cylindrical body (11), and dish-shaped end plates (12, 13) fixed to the upper and lower ends of the body (11) or in the vicinity thereof by welding. ing. The casing (10) is provided with a suction pipe (14) passing through the upper end plate (12). A discharge pipe (15) penetrating the trunk (11) is provided at a position slightly above the center of the trunk (11) so as to communicate with the inside and outside of the casing (10). A predetermined amount of lubricating oil (refrigeration oil) is stored in the lower part of the casing (10) (not shown).
[0041]
  The compressor motor (30) includes a stator (31) fixed to the body (11) of the casing (10), and a rotor (32) disposed inside the stator (31). A drive shaft (33) is fixed to the rotor (32) of the motor (30). The drive shaft (33) protrudes up and down with respect to the stator (31) and the rotor (32) of the compressor motor (30). The drive shaft (33) has an upper end connected to the compression mechanism (20), and a lower end thereof is a bearing member (34) fixed to a lower end of the body (11) of the casing (10). Is rotatably supported.
[0042]
  On the other hand, the compression mechanism (20) includes a fixed scroll (21), a movable scroll (22), and a housing (23). The fixed scroll (21) includes a mirror plate (21a) and a spiral (involute) wrap (21b) formed on the lower surface of the mirror plate (21a). The movable scroll (22) is composed of an end plate (22a) and a spiral (involute) wrap (22b) formed on the upper surface of the end plate (22a).
[0043]
  The housing (23) constitutes a part of the compression mechanism (20), and the position of the compression mechanism (20) is fixed by press-fitting the housing (23) into the casing (10) and fixing it. . The housing (23) is a partition member that vertically divides the internal space of the casing (10). A low pressure space is formed above the housing (23), and a high pressure space is formed below the housing (23).
[0044]
  The fixed scroll (21) is fixed to the upper surface of the housing (23) by fastening means such as a bolt (not shown). The movable scroll (22) is disposed between the fixed scroll (21) and the housing (23). Further, between the end plate (22a) of the movable scroll (22) and the housing (23), rotation of an Oldham coupling or the like is performed so that the movable scroll (23) only revolves with respect to the fixed scroll (21). A blocking member (24) is provided.
[0045]
  The wrap (21b) of the fixed scroll (21) and the wrap (22b) of the movable scroll (22) mesh with each other. Between the end plate (21a) of the fixed scroll (21) and the end plate (22a) of the movable scroll (22), a space between the contact portions of both wraps (21b, 22b) is formed as a compression chamber (25). ing. The compression chamber (25) is configured to compress the refrigerant as the volume between the wraps (21b, 22b) contracts toward the center as the movable scroll (22) revolves.
[0046]
  The end plate (21a) of the fixed scroll (21) is formed with a suction port (21c) for low-pressure refrigerant at the periphery of the compression chamber (25), and the end plate (22a) of the movable scroll (22) A discharge port (22c) for high-pressure refrigerant is formed at the center of the chamber (25). A suction pipe (14) fixed to the end plate (12) of the casing (10) is connected to the refrigerant suction port (21c), and the suction pipe (14) is connected to an evaporator of a refrigerant circuit (not shown). Has been.
[0047]
  A boss (22d) connected to the upper end (33a) of the drive shaft (33) is formed at the center of the lower surface of the end plate (22a) of the movable scroll (22). The upper end (33a) of the drive shaft (33) is an eccentric shaft that is eccentric from the rotation center of the drive shaft (33), and the housing (23) is positioned just below the eccentric shaft (33a). Is rotatably supported. The seal ring (26) is disposed around the boss (22d) and fitted into the inner hole (23a) of the housing (23), and the high pressure introduced into the inner hole (23a). The refrigerant gas is configured not to leak to the outer peripheral side of the seal ring (26).
[0048]
  The drive shaft (33) is formed with a discharge path (27) for guiding the high-pressure refrigerant from the discharge port (22c) of the movable scroll (22) to the space below the housing (23). The discharge path (27) has a lower end opened at a position below the compressor motor (30). The high-pressure refrigerant gas that has flowed out of the discharge passage (27) passes from the discharge pipe (15) provided in the body (11) of the casing (10) to the condenser of the refrigerant circuit via a refrigerant pipe (not shown). Supplied.
[0049]
  The drive shaft (33) is provided with an oil supply pump (28) and an oil supply passage (33b). The oil pump (28) is provided at the lower end of the drive shaft (33), and is configured to pump up lubricating oil (not shown) stored in the lower part of the casing (10) as the drive shaft (33) rotates. Yes. The oil supply passage (33b) extends in the vertical direction in the drive shaft (33) and supplies the lubricating oil pumped up by the oil supply pump (28) to each sliding portion. Communicated with.
[0050]
  In the above configuration, when the motor (30) is driven, the rotor (32) rotates, and thereby the drive shaft (33) rotates. When the drive shaft (33) rotates, the movable scroll (22) does not rotate but only revolves with respect to the fixed scroll (21). As a result, as the volume of the compression chamber (25) changes, a low-pressure refrigerant is sucked from the suction pipe (14) to the peripheral portion of the compression chamber (25) and the refrigerant is compressed, and the refrigerant becomes a high pressure. Thus, it flows through the discharge passage (27) and fills the space below the housing (23) in the casing (10). Then, after this refrigerant is discharged from the discharge pipe (15), the refrigerant circuit is repeatedly sucked and compressed through the suction pipe (14) through the condensation, expansion, and evaporation processes.
[0051]
  As described above, the housing (23) partitions the internal space of the casing (10) vertically. As a feature of the first embodiment, the housing (23) itself has a sealing function between the low pressure space above the housing (23) and the high pressure space below. Therefore, the seal structure will be described below with reference to FIGS.
[0052]
  First, the housing (23) is dimensioned so that its outer peripheral surface (40) is fixed to the body (11) of the casing (10) by press-fitting in FIG. 2, which is an enlarged sectional view of the seal structure. A flange portion (41) projecting radially outward is formed at the upper end portion so as to contact the upper end surface of the body portion (11). Further, on the outer peripheral surface (40) of the housing (23), the casing (10) and the end plate (12) are welded in the circumferential direction so as to allow shrinkage of the casing (10) due to the welding. A continuous circumferential groove (42) is formed. The circumferential groove (42) is formed at a position immediately below the flange (41) on the outer peripheral surface (40) of the housing (23).
[0053]
  The housing (23) has a thick part (43) and a thin part (44) having different thicknesses in the radial direction. The thick wall portion (43) is a thick wall portion having a uniform diameter throughout, and the thin wall portion (44) is a portion including a thin wall portion in at least a part of the whole.
[0054]
  On the outer peripheral surface (40) of the housing (23), a protrusion (45) continuous in the circumferential direction is formed at a position close to the lower end of the circumferential groove (42), and the protrusion (45) , Located on the outer periphery of the thick part (43). The projecting portion (45) is configured to be press-fitted into the body portion (11) of the casing (10), and as shown in an enlarged view of FIG. 3, both axial end portions (upper and lower end portions). (45a, 45b) are formed on the tapered surface. Of the tapered surface of the protrusion, the press-fitting (lower) tapered surface (45a) with respect to the body is inclined at an angle of about 15 ° with respect to the outer peripheral surface (40) of the housing (23). The opposite (upper) tapered surface (45b) is inclined at an angle of about 45 ° with respect to the outer peripheral surface (40) of the housing (23).
[0055]
  The upper end plate (12) of the casing (10) is in axial contact with the housing (23), while being radially fitted to the body (11) and the housing (23). It is configured as follows. That is, the end plate (12) is arranged in the axial direction with respect to the body (11) and the housing (23), but is not positioned in the radial direction in this portion. Thereby, the assembling work at the time of welding of a trunk | drum (11) and an end plate (12) can be performed easily.
[0056]
  In the above seal structure, the housing (23) of the compression mechanism (20) is press-fitted into the body (11) until the flange (41) contacts the upper end surface of the body (11), and then the end plate (12 ) Is welded to the body (11), so that the compression mechanism (20) is firmly positioned in the casing (10), and the high pressure space and the low pressure space are sealed.
[0057]
  That is, first, as shown in FIG. 2 (a), the housing (23) is press-fitted into the body (11) so that the outer peripheral surface (40) of the housing (23) is pressed against the inner peripheral surface of the body (11). And the projection (45) bites into the inner peripheral surface of the barrel (11), and then the end plate (12) is welded to the barrel (11) as shown in FIG. After cooling, the body (11) contracts at the position of the circumferential groove (42), and the body (11) strongly tightens the housing (23) from at least the circumferential groove (42) to the portion immediately below it. As a result, an operation equivalent to the increase in the press-fitting allowance of the outer peripheral surface (40) of the housing (23) and the protrusion (45) with respect to the body (11) occurs, and a high sealing effect is obtained. . In this way, not only simply press-fitting the housing (23) into the body (11) or causing the protrusion (45) to bite into the body (11), but also the shrinkage after welding of the body (11). By using this, it becomes possible to improve the sealing performance to the same extent as that of shrink fitting.
[0058]
  On the other hand, in this embodiment, although the same sealing performance as that obtained by shrink fitting can be obtained, actually shrink fitting is not necessary, and this type of compressor (1) does not necessarily perform it. Since the sealing performance is enhanced by welding the body (11) and the end plate (12), which is the work to be performed, there is no need for additional work for the sealing function, and workability during assembly is press-fit. It is very good as in the case of performing only.
[0059]
  In addition, in the configuration in which the body (11) and the end plate (12) are welded after the housing (23) is shrink-fitted to the body (11), there is a possibility that the parts are distorted due to repeated heating. In the invention, since the heating is performed once, there is little risk of distortion of the parts.
[0060]
  Conventionally, a dedicated seal member such as an O-ring has been generally used as a seal structure. However, in the first embodiment, a seal-dedicated component such as an O-ring is not necessary. The number of parts does not increase due to the function, and the accompanying cost increase does not occur.
[0061]
  Further, since the tapered surface (45a) is formed on the front side in the press-fitting direction to the body part (11) among the end parts of the protrusion part (45), the housing (23) is pressed into the casing (10). It can be done easily. Further, since the rear side in the press-fitting direction is formed on the tapered surface (45b) among the end portions of the protrusion (45), the body portion (11) and the end plate (12) are welded to the body portion (11). When 11) contracts along the tapered surface (45b), the contracted portion comes into pressure contact with the tapered surface (45a), so that a sufficient sealing property can be obtained. That is, if this portion is not sufficiently pressed, the sealing performance may be lowered, whereas in this embodiment, this portion is sufficiently pressed, so that the sealing performance is improved.
[0062]
  In this embodiment, since the protrusion (45) is formed on the outer periphery of the thick part (43) of the housing (23), the force that the casing (10) strongly tightens the housing (23) by shrinkage due to welding. It is possible to sufficiently resist the thick wall portion (43). Therefore, even if the casing (10) contracts, the housing (23) does not deform.
[0063]
  Further, in this embodiment, the housing (23) to which the fixed scroll (21) is fixed is press-fitted into the body portion (11), and the protrusion (45) is formed on the outer peripheral surface (40) thereof. Since the high pressure space and the low pressure space are sealed by tightening (23) with the body (11), the tightening force due to the contraction of the casing (10) does not act directly on the fixed scroll (21). . For this reason, since the wrap (21b) of the fixed scroll (21) is not deformed, the performance of the compressor (1) does not deteriorate due to refrigerant leakage or the like.
[0064]
  (referenceExample 1)
  In the first embodiment, the casing (10) is configured so that the end plate (12) is fitted to the outer periphery of the body (11) and the housing (23) in a clearance fit, but as shown in FIG. In addition, as a configuration in which the end plate (12) is fitted to the inner peripheral side of the body portion (11) of the casing (10), the end groove (42) of the housing (23) is contracted to shrink the end plate (12) by welding. Configure as possibleYou can also in this wayThe circumferential groove (42) of the housing (23) allows the casing (10) to contract at the welded portion of the body (11) and the end plate (12), so that the casing (10) If it is configured to tighten firmly, receive either the body (11) or the end plate (12)Also,The same effects as those of the first embodiment can be obtained.
[0065]
  (DeformationExample)
  A modification of the protrusion will be described.
[0066]
  For example, in the example of FIG. 5, only the lower end (45a) of the projection (45) on the press-fitting side to the body (11) is formed on the tapered surface, and the upper end (45b) Is configured to rise at a right angle from the outer peripheral surface (40) of the housing (23). Further, in the example of FIG. 6, the upper end (45b) of the protrusion (45) in the first embodiment is a tapered surface directly connected to the circumferential groove (42). (45b) is an example in which only the portion from the outer peripheral end of the protrusion (45) to the outer peripheral surface (40) of the housing (23) is a tapered surface. Furthermore, the example of FIG. 7 is an example in which the upper and lower end portions (45a, 45b) of the projection portion (45) are not tapered surfaces, but are end surfaces rising at right angles from the outer peripheral surface (40) of the housing (23). It is.
[0067]
  Even if the protrusion (45) is configured as described above, if the casing (10) contracts after the body (11) and the end plate (12) are welded, the casing (10) strongly strengthens the protrusion (45). Since it is tightened, it is possible to improve the sealing performance as compared with the conventional case and to prevent the workability from being lowered.
[0068]
  In the example of FIG. 8, the protrusions (46, 47) are provided at a plurality of locations on the outer peripheral surface (40) of the housing (23) so that the protrusion heights of the plurality of protrusions (46, 47) are different from each other. This is an example. Specifically, the protrusion (46) on the press-fitting side (lower side) of the housing (23) with respect to the body (11) is reduced in height, and the protrusion (47) on the rear side (upper) is protruded. The height is increased.
[0069]
  In this example, since the protrusions (46, 47) that are continuous in the circumferential direction on the outer peripheral surface (40) of the housing (23) are arranged in multiple in the axial direction of the housing (23), the trunk portion (11) Since the number of press-fitting locations of the protrusions (46, 47) with respect to is increased, the sealing performance is improved. In addition, since the protrusion height of the protrusion (46) on the press-fitting side of the housing (23) with respect to the body (11) is reduced, the housing ( 23) can be relatively easily press-fitted.
[0070]
Second Embodiment of the Invention
  In the first embodiment, the outer peripheral surface (40) of the housing (23) is configured to be press-fitted into the body (11), and then the peripheral groove (42) and the protrusion (45) are formed in the outer peripheral surface (40). In the second embodiment, as shown in FIG. 9, the outer peripheral surface (40) of the housing (23) is spaced from the body (11) of the casing (10). It is supposed to be a fit. In the drawing, the clearance fit is exaggerated.
[0071]
  A circumferential groove (42) continuous in the circumferential direction on the outer peripheral surface (40) of the housing (23) so as to allow shrinkage of the casing (10) due to the welding at the welded portion of the body (11) and the end plate (12) And a protrusion (45) continuous in the circumferential direction at a position close to the circumferential groove (42), and the protrusion (45) is press-fitted into the body (11) of the casing (10). This is the same as in the first embodiment. Other configurations are the same as those in the first embodiment.
[0072]
  Thus, in the configuration in which the outer peripheral surface (40) of the housing (23) is a clearance fit with the body (11) or the end plate (12) of the casing (10), the outer peripheral surface (40 When the circumferential groove (42) and the protrusion (45) are formed in the housing (23), the housing (23) can be more easily press-fitted into the body (11), and the assembling work is facilitated.
[0073]
  Further, when the body (11) and the end plate (12) are welded in a state in which the protrusion (45) of the housing (23) is press-fitted into the body (11), the casing (10) is moved to the circumferential groove (42). By contracting at the position, the tightening force becomes stronger. Therefore, even in this configuration, it is possible to obtain a sealing property equivalent to that of shrink fitting.
[0074]
  Further, in this configuration, since the housing (23) is a clearance fit, the casing (10) strongly tightens only the protrusion (45), and no strong tightening force acts on the entire housing (23). The deformation of 23) is less likely to occur.
[0075]
  In the second embodiment, the protrusions (45) (46, 47) can be changed as shown in FIGS.
[0076]
Other Embodiments of the Invention
  The present invention may be configured as follows with respect to the above embodiment.
[0077]
  For example, in the above-described embodiment, the example in which the housing (23) is the partition member has been described. However, the fixed scroll (21) may be fixed to the casing (10) as the partition member, and the high-pressure space and the low-pressure space may be partitioned. . In that case, if a protrusion is formed around the thick part of the fixed scroll (21) (for example, the end plate (21a)), a strong tightening force does not act on the wrap (21b). Leakage of the refrigerant due to deformation can be prevented, and no performance degradation occurs.
[0078]
  In the above embodiment, the example in which the present invention is applied to the scroll compressor (1) has been described, but the present invention is also applicable to other types of rotary compressors such as a rotary compressor and a swing compressor. is there. Even in this case, a partition member for partitioning the inside of the casing (10) into a high pressure space and a low pressure space is press-fitted into the casing (10) at the welded portion of the body (11) and the end plate (12), and the casing (10 The partition member is preferably tightened by using the contraction of
[0079]
  In the above embodiment, the example in which the protrusions (45), (46, 47) are formed on the outer peripheral surface (40) of the housing (23) press-fitted into the casing (10) has been described. In the case where the surface (40) is press-fitted into the casing (10), the protrusions (45) (46, 47) are not necessarily formed. That is, a housing (23) having no protrusion on the outer peripheral surface (40) may be press-fitted into the body (11) and a tightening force due to shrinkage after welding may be used. Even in this case, the assembling work is easy, and the casing (10) strongly tightens the outer peripheral surface of the housing (23) by shrinkage due to welding, so that the sealing performance can be improved as compared with the conventional case.
[0080]
  Further, in the above embodiment, the configuration has been described in which the housing (23) is press-fitted and fixed to the body (11) of the casing (10), but the partition member such as the housing (23) is the end plate of the casing (10) ( It is good also as a structure fixed to 12).
[0081]
【The invention's effect】
  As described above, according to the first aspect of the present invention, the circumferential groove is formed in the outer peripheral surface (40) of the partition member (23) fitted to the body (11) or the end plate (12) of the casing (10). (42) is formed, and the casing (10) can be contracted by welding at the welded portion of the body (11) and the end plate (12). It is possible to strongly tighten, thereby improving the sealing performance at the joint between the casing (10) and the partition member (23). Therefore, even if the partition member (23) is simply press-fitted into the casing (10), it is possible to obtain the same sealing performance as that obtained by shrink fitting after welding. In addition, since there is no need for shrink fitting, it is excellent in workability during assembly. Further, in the configuration in which the body (11) and the end plate (12) are welded after the partition member (23) is shrink-fitted into the body (11), there is a possibility that parts are distorted due to repeated heating. In the present invention, since the heating is performed once, there is little possibility that the parts are distorted.
[0082]
  In addition, an O-ring or the like is sometimes used in a conventional compressor to improve the sealing performance. In this case, the cost is increased. However, in the above configuration, a dedicated sealing member such as an O-ring is not necessary. There is no cost increase due to the increase in the number of points.
[0083]
  Moreover, the partition member (twenty three) Projecting outward in the radial direction (11) The buttocks that contact the end face of (41) While providing the above-mentioned end plate (12) But the above buttocks (41) And abutting against the end surface of the body (11) And buttocks (41) In contrast, a clearance fit is provided in the radial direction. Therefore, the end plate (12) The casing (Ten) End plate while easily positioning with respect to (12) And torso (11) By partitioning the partition member (twenty three) The casing (Ten) Therefore, workability is improved.
[0084]
  According to the second aspect of the present invention, the protrusion (45) (46, 47) close to the circumferential groove (42) is formed on the outer peripheral surface (40) of the partition member (23), and the protrusion Since the parts (45), (46, 47) are press-fitted into the body part (11) or the end plate (12) of the casing (10), the sealing performance is further improved by the effect of the shrinkage of the body part (11) described above. Enhanced.
[0085]
  According to the invention described in claim 3, in the case where the outer peripheral surface (40) of the partition member (23) is a clearance fit in the body (11) or the end plate (12) of the casing (10), the partition A circumferential groove (42) and projections (45) (46, 47) are formed on the outer peripheral surface (40) of the member (23). For this reason, it is only necessary to press-fit only the portions of the protrusions (45) (46, 47) into the casing (10), so that the assembling work is easy. Further, since the casing (10) strongly tightens only the protrusions (45) (46, 47), it is possible to prevent a strong tightening force from acting on the entire partition member (23). Therefore, deformation of the partition member (23) can also be prevented. Further, as in the first and second aspects of the invention, the sealing performance is improved and the cost is not increased due to an increase in the number of parts.
[0086]
  According to the invention described in claim 4, the circumferentially continuous projections (46, 47) are provided at a plurality of locations on the outer peripheral surface (40) of the partition member (23), and multiple sealing effects are provided in the axial direction. Therefore, the sealing performance is further improved.
[0087]
  Further, according to the invention described in claim 5, since the protruding heights of the plurality of protrusions (46, 47) are different from each other, for example, the press-fitting direction of the partition member (23) with respect to the casing (10) When the projection height of the projections (46, 47) on the front side is reduced and the projection height of the projections (46, 47) on the rear side in the press-fitting direction is increased, the partition member (23 ) Can be fitted relatively easily. That is, workability can be further enhanced without degrading the sealing performance.
[0088]
  According to the invention described in claim 6, since one end or both ends (45a, 45b) in the axial direction of the protrusions (45), (46, 47) are tapered surfaces, the protrusions (45) ( Of the end portions of 46, 47), the front side in the press-fitting direction of the partition member (23) with respect to the casing (10) is formed on the tapered surface (45a), thereby facilitating insertion and improving workability. Conversely, if the rear side in the press-fitting direction of the end portions of the protrusions (45) (46, 47) is formed on the tapered surface (45b), the body portion (11) is in pressure contact with the tapered surface. A good sealing property.
[0089]
  According to the invention of claim 7, when the partition member (23) has the thick part (43) and the thin part (44) having different thicknesses in the radial direction, the protrusion (45) ( 46, 47) are formed on the outer periphery of the thick portion (43) having high rigidity, so that the partition member (23) can be prevented from being deformed even if the trunk portion (11) is contracted by welding. Therefore, for example, even when the fixed scroll (21) is fixed to the casing (10) as a partition member in the scroll compressor, it is possible to prevent the performance of the compressor from being deteriorated due to the deformation of the fixed scroll (21).
[0090]
  Also,According to the invention of claim 12, the casing (Ten) End plate (12) But the torso (11) Or compression mechanism (20) Partition member (twenty three) While the body abuts in the axial direction (11) Or partition member (twenty three) It is comprised so that it may become a clearance fit. Therefore, the end plate (12) The casing (Ten) End plate while easily positioning with respect to (12) And torso (11) By partitioning the partition member (twenty three) The casing (Ten) Therefore, workability is improved.
[0091]
  According to a thirteenth aspect of the present invention, in the scroll compressor, the member to which the fixed scroll is fixed is the partition member. (twenty three) And torso (11) And end plate (12) Partition member using shrinkage due to welding (twenty three) Is tightened. Therefore, since the tightening force does not directly act on the fixed scroll, it is possible to reliably prevent the performance from being deteriorated due to leakage loss due to the deformation of the spiral. In addition, the fixed scroll and casing can be used to reduce leakage loss with the conventional structure. (Ten) Partition member between (twenty three) It is conceivable to provide an elastic member that absorbs the deformation, but in this case, the number of parts increases, the assemblability deteriorates and the cost increases. Absent.
[Brief description of the drawings]
FIG. 1 is a sectional structural view of a scroll compressor according to Embodiment 1 of the present invention.
FIG. 2 is a partially enlarged view of the scroll compressor of FIG. 1, showing a seal structure between a high-pressure space and a low-pressure space in the casing.
FIG. 3 is an enlarged view of a protrusion of the housing.
[Fig. 4] The welded part of the body of the casing and the end plateChanged referenceIt is a figure which shows an example.
FIG. 5 is a diagram showing a first modification of a protrusion.
FIG. 6 is a diagram showing a second modification of the protrusion.
FIG. 7 is a diagram showing a third modification of the protrusion.
FIG. 8 is a diagram showing a fourth modification of the protrusion.
FIG. 9 is a partially enlarged view showing a seal structure of the scroll compressor according to the second embodiment.
FIG. 10 is a sectional structural view of a conventional scroll compressor.
[Explanation of symbols]
(1) Scroll compressor (rotary compressor)
(10) Casing
(11) Torso
(12,13) End plate
(20) Compression mechanism
(21) Fixed scroll
(22) Movable scroll
(23) Housing (partition member)
(30) Compressor motor
(40) Outer surface
(42) Circumferential groove
(43) Thick part
(44) Thin part
(45) Projection
(45a, 45b) end
(46,47) Projection

Claims (13)

In the casing (10), a compressor motor (30), a compression mechanism (20) driven by the compressor motor (30), and a partition member that divides the casing (10) into a high pressure space and a low pressure space (23), a casing (10) is a rotary compressor having a cylindrical body (11) and an end plate (12) fixed to the body (11) by welding,
The partition member (23) is barrel (11) and the end plate (12) of the welding location or configured Rutotomoni, the barrel protrudes radially outward so as to be press-fitted into the casing (10) in the vicinity (11 ) (1) provided with a collar (41) that contacts the end surface of
Said end plate (12) is adapted to abut against the end face of the collar portion (41), it is configured to be clearance-fitted in the radial direction with respect to the body portion (11) and a collar portion (41),
The outer peripheral surface (40) of the partition member (23) has a circumferential circumference continuous so as to allow shrinkage of the casing (10) due to welding at the welded portion of the body (11) and the end plate (12). A rotary compressor characterized in that a groove (42) is formed. On the outer peripheral surface (40) of the partition member (23), there are formed protrusions (45) (46, 47) that continue in the circumferential direction at positions close to the circumferential groove (42),
2. The rotary compressor according to claim 1, wherein the protrusions (45) (46, 47) are configured to be press-fitted into the casing (10). In the casing (10), a compressor motor (30), a compression mechanism (20) driven by the compressor motor (30), and a partition member that divides the casing (10) into a high pressure space and a low pressure space (23), a casing (10) is a rotary compressor having a cylindrical body (11) and an end plate (12) fixed to the body (11) by welding,
The partition member (23) is barrel (11) and the end plate (12) of the welded portion or the body portion protrudes Rutotomoni is configured to be clearance fit, radially outward to the casing (10) in the vicinity thereof ( 11) provided with a flange (41) that contacts the end face of
Said end plate (12) is adapted to abut against the end face of the collar portion (41), it is configured to be clearance-fitted in the radial direction with respect to the body portion (11) and a collar portion (41),
On the outer peripheral surface (40) of the partition member (23), a circumferential groove continuous in the circumferential direction so as to allow shrinkage of the casing (10) due to welding at the welded portion of the body (11) and the end plate (12). (42) and protrusions (45) (46, 47) continuous in the circumferential direction at positions close to the circumferential groove (42) are formed,
The rotary compressor characterized in that the projections (45) (46, 47) are configured to be press-fitted into the casing (10).   The rotary compressor according to claim 2 or 3, wherein the projections (46, 47) of the partition member (23) are provided at a plurality of locations.   5. The rotary compressor according to claim 4, wherein the protruding heights of the plurality of protrusions (46, 47) are different from each other.   The projection (45) (46, 47) is characterized in that one end or both ends (45a, 45b) in the axial direction of the partition member (23) are formed in a tapered surface. The rotary compressor according to 1. The partition member (23) has a thick part (43) and a thin part (44) with different thicknesses in the radial direction,
The rotary compressor according to any one of claims 2 to 6, wherein the protrusion (45) (46, 47) is formed on an outer periphery of the thick portion (43). In the casing (10) , a compressor motor (30) , a compression mechanism (20) driven by the compressor motor (30) , and a partition member that divides the casing (10) into a high pressure space and a low pressure space (23) , a casing (10) is a rotary compressor having a cylindrical body (11) and an end plate (12) fixed to the body (11) by welding ,
The partition member (23) is configured to be press-fitted into the casing (10) at or near the welded portion of the body (11) and the end plate (12) ,
The outer peripheral surface (40) of the partition member (23) has a circumferential circumference continuous so as to allow shrinkage of the casing (10) due to welding at the welded portion of the body (11) and the end plate (12). A groove (42) is formed,
On the outer peripheral surface (40 ) of the partition member (23) , protrusions (45) (46, 47) that continue in the circumferential direction at positions close to the circumferential groove (42 ) are formed,
The protrusion (45) (46, 47) is configured to be press-fitted into the casing (10) ,
Protrusions (46, 47 ) of the partition member (23) are provided at a plurality of locations,
The rotary compressor characterized in that the protrusion heights of the plurality of protrusions (46, 47) are different from each other . In the casing (10) , a compressor motor (30) , a compression mechanism (20) driven by the compressor motor (30) , and a partition member that divides the casing (10) into a high pressure space and a low pressure space (23) , a casing (10) is a rotary compressor having a cylindrical body (11) and an end plate (12) fixed to the body (11) by welding ,
The partition member (23) is configured to have a clearance fit in the casing (10) at or near the welded portion of the body (11) and the end plate (12) ,
On the outer peripheral surface (40) of the partition member (23) , a circumferential groove continuous in the circumferential direction so as to allow shrinkage of the casing (10) due to welding at the welded portion of the body (11) and the end plate (12). (42) and protrusions (45) (46, 47) continuous in the circumferential direction at a position close to the circumferential groove (42) are formed,
The protrusion (45) (46, 47) is configured to be press-fitted into the casing (10) ,
Protrusions (46, 47 ) of the partition member (23) are provided at a plurality of locations,
The rotary compressor characterized in that the protrusion heights of the plurality of protrusions (46, 47) are different from each other . protrusion (45) (46,47) Is a partition member (twenty three) One or both ends in the axial direction (45a, 45b) The rotary compressor according to claim 8 or 9, wherein is formed on a tapered surface. Partition member (twenty three) Thick part with different thickness in the radial direction (43) And thin part (44) And
protrusion (45) (46,47) Is the thick part (43) The rotary compressor according to claim 8, wherein the rotary compressor is formed on an outer periphery of the compressor. casing (Ten) End plate (12) The torso (11) Or partition member (twenty three) While abutting in the axial direction against the body (11) Or partition member (twenty three) The rotary compressor according to any one of claims 8 to 11, wherein the rotary compressor is configured so as to have a clearance fit. Compression mechanism (20) Scroll type compression mechanism (20) Composed of
Partition member (twenty three) The fixed scroll (twenty one) The rotary compressor according to any one of claims 1 to 12, wherein the rotary compressor is fixed.

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