EP3951179B1 - Compressor - Google Patents
Compressor Download PDFInfo
- Publication number
- EP3951179B1 EP3951179B1 EP19922423.9A EP19922423A EP3951179B1 EP 3951179 B1 EP3951179 B1 EP 3951179B1 EP 19922423 A EP19922423 A EP 19922423A EP 3951179 B1 EP3951179 B1 EP 3951179B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- main body
- housing
- bolt
- housing main
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000006835 compression Effects 0.000 claims description 143
- 238000007906 compression Methods 0.000 claims description 143
- 230000007246 mechanism Effects 0.000 claims description 81
- 239000003507 refrigerant Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000012423 maintenance Methods 0.000 description 13
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/14—Provisions for readily assembling or disassembling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
- F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
- F04C18/3564—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/005—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of dissimilar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/805—Fastening means, e.g. bolts
Definitions
- the present invention relates to a compressor.
- the compressor disclosed in PTL 1 includes a housing, a rotary shaft, a scroll compression mechanism, and a motor.
- the housing extends in a vertical direction.
- the housing has a tubular housing main body, a first lid portion that closes a lower end of the housing main body, and a second lid portion that closes an upper end of the housing main body.
- the first and second lid portions are respectively fixed to the housing main body by a welding method.
- the rotary shaft is housed in the housing and extends in the vertical direction.
- the scroll compression mechanism is housed at an upper portion in the housing 11.
- the scroll compression mechanism has a scroll compression portion and a bearing portion.
- the scroll compression mechanism is provided at an upper end portion of the rotary shaft.
- the motor is housed in the housing and drives the scroll compression portion by rotating the rotary shaft.
- an object of the present invention is to provide a compressor capable of easily performing the maintenance of components of a compressor housed in a housing including a compression mechanism.
- the bolt hole for fastening the fourth bolt and the bolt hole for fastening the second bolt on the same end surface (same plane) in this way, these bolt holes can be easily formed, and the number of flattened parts can be reduced.
- the present invention by including the first lid portion fixed to the housing main body by the first bolt from the one side in the axis direction to close the first open end and the first compression mechanism fixed to the housing main body by the third bolt from the one side in the axis direction, it is possible to easily attach and detach the first lid portion and the first compression mechanism with respect to the housing main body.
- the maintenance of the first compression mechanism and the components of the compressor disposed on the first compression mechanism side and housed in the housing can be easily performed.
- the second lid portion fixed to the housing main body by the second bolt from the other side in the axis direction to close the second open end and the second compression mechanism fixed to the housing main body by the fourth bolt from the other side in the axis direction, it is possible to easily attach and detach the second lid portion and the second compression mechanism with respect to the housing main body.
- the maintenance of the second compression mechanism and the components of the compressor disposed on the second compression mechanism side and housed in the housing can be easily performed.
- the maintenance of the components of the compressor housed in the housing including the first and second compression mechanisms can be easily performed.
- the first compression mechanism includes a first bearing portion that rotatably supports one end portion of the rotary shaft, and a first compression portion that is fixed to the first bearing portion and compresses the refrigerant, and the first bearing portion is fixed to the housing main body by the third bolt.
- the first compression mechanism to have the first bearing portion and the first compression portion and fixing the first bearing portion to the housing main body by the third bolt, the first bearing portion and the first compression portion can be attached and detached as one structure.
- the second compression mechanism may include a second bearing portion that rotatably supports the other end portion of the rotary shaft, and a second compression portion that is fixed to the second bearing portion and compresses the refrigerant, and the second bearing portion may be fixed to the housing main body by the fourth bolt.
- the second compression mechanism to have the second bearing portion and the second compression portion and fixing the second bearing portion to the housing main body by the fourth bolt, the second bearing portion and the second compression portion can be attached and detached as one structure.
- the housing may extend in a vertical direction
- the first compression portion may be a rotary compression portion that is disposed at a bottom portion in the housing
- the second compression portion may be a scroll compression portion that is disposed at an upper portion in the housing.
- the invention may be applied to a vertical compressor having the rotary compression portion as the first compression portion, the scroll compression portion as the second compression portion, and the housing extending in the vertical direction.
- the housing may have a motor stator support that protrudes radially inward from an inner peripheral surface of the housing main body and supports a lower surface of the motor stator, and the motor stator is fixed to the motor stator support by a fifth bolt from the other side in the axis direction.
- the motor stator support and the fifth bolt having such a configuration, the motor stator in the axis direction can be easily positioned when the motor stator is installed in the housing.
- the housing may include a first compression mechanism support that is configured integrally with the housing main body and protrudes radially inward from an inner peripheral surface of the housing main body,
- the motor stator support may be configured integrally with the housing main body, and the housing main body, the motor stator support, the first lid portion, and the second lid portion may be cast products.
- the housing main body, the motor stator support, the first lid portion, and the second lid portion By using the cast products as the housing main body, the motor stator support, the first lid portion, and the second lid portion in this way, the housing main body, the motor stator support, the first lid portion, and the second lid portion having complicated shapes can be easily formed.
- the maintenance of the components of the compressor housed in the housing including the first and second compression mechanisms can be easily performed.
- a compressor 10 according to an embodiment of the present invention will be described with reference to Figs. 1 to 4 .
- O 1 represents an axis of a rotary shaft main body 55 (hereinafter, referred to as “axis O 1 ")
- O 2 represents indicates an axis of the eccentric shaft portion 56 (hereinafter, referred to as “axis O 2 ").
- an X direction indicates a radial direction of the compressor 10
- a Z direction indicates an axis direction (vertical direction) orthogonal to the X direction
- a to C indicate regions, respectively.
- a lower side of a paper surface indicates one side in a direction of the axis O 1 (hereinafter, referred to as “one side in the axis direction”), and an upper side of the paper surface indicates the other side in the direction of the axis O 1 (hereinafter, referred to as “the other side in the axis direction").
- a two-cylinder rotary compression portion 78 is taken as an example of a first compression portion constituting a first compression mechanism 18.
- D represents a region (hereinafter referred to as "inner region D") of an upper end surface 41a where a fourth bolt hole 41F is formed
- E represents a region (hereinafter, referred to as "outer region E") of the upper end surface 41a which is disposed outside the inner region D and where the second bolt hole 41D is formed.
- the compressor 10 includes a housing 11, a rotary shaft 13, a lower bearing portion 15, an oil supply pump 17, a first compression mechanism 18, a third bolt 19, a second compression mechanism 21, a fourth bolt 22, a motor 23, a fifth bolt 24, an discharge valve 26, a bush assembly 27, a thrust plate 29, an Oldham ring 30, a cover 31, and a discharge pipe 35.
- the housing 11 has a semi-sealed structure.
- An oil reservoir 39 formed by accumulation of oil 38 is disposed at a bottom portion 11A in the housing 11.
- the housing 11 includes a housing main body 41, a motor stator support 42, a first compression mechanism support 43, a first lid portion 44, a second lid portion 45, a first bolt 46, and a second bolt 47.
- the housing main body 41 is formed in a tubular shape and extends in the Z direction.
- the housing main body 41 has a first open end 41A disposed on one side in the axis direction, a second open end 41B disposed on the other side in the axis direction, a first bolt hole 41C, a second bolt hole 41D, and a fourth bolt hole 41F.
- the housing main body 41 has an upper end surface 41a (end surface) disposed on the other side in the axis direction and a lower end surface 41b disposed on one side in the axis direction.
- the upper end surface 41a and the lower end surface 41b are planes orthogonal to the Z direction.
- a plurality of the first bolt holes 41C are formed at a lower end portion of the housing main body 41.
- Each first bolt hole 41C is formed so as to extend upward (the other side in the axis direction) from the lower end surface 41b.
- the plurality of first bolt holes 41C are disposed at intervals in a circumferential direction of the housing main body 41.
- a plurality of the second bolt holes 41D are formed at an upper end portion of the housing main body 41.
- the plurality of second bolt holes 41D are disposed at intervals in the circumferential direction of the housing main body 41.
- Each second bolt hole 41D is formed so as to extend downward (one side in the axis direction) from the upper end surface 41a.
- a plurality of the fourth bolt holes 41F are formed in an inner region D disposed inside an outer region E where the second bolt holes 41D are formed, in the upper end portion of the housing main body 41.
- the plurality of fourth bolt holes 41F are disposed at intervals in the circumferential direction of the housing main body 41.
- the fourth bolt hole 41F is formed so as to extend downward (one side in the axis direction) from the upper end surface 41a.
- the plurality of second and fourth bolt holes 41D and 41F are formed on the upper end surface 41a that is the same plane.
- the plurality of second and fourth bolt holes 41D and 41F can be easily formed, and the number of flattened parts can be reduced.
- the first lid portion 44 is disposed directly below the housing main body 41 so as to come into contact with the lower end surface 41b.
- the first lid portion 44 closes the first open end 41A.
- a plurality of bolt holes 44A are formed in the first lid portion 44. Each bolt hole 44A is formed so as to penetrate a portion of the first lid portion 44 facing the first bolt hole 41C in the Z direction.
- the second lid portion 45 is disposed on the housing main body 41.
- the second lid portion 45 comes into contact with the outer region E of the upper end surface 41a where the plurality of second bolt holes 41D are formed and exposes the inner region D of the upper end surface 41a where the plurality of fourth bolt holes 41F are formed.
- the second lid portion 45 closes the second open end 41B.
- the second lid portion 45 has a plurality of bolt holes 45A and a discharge pipe mounting portion 45B. Each bolt hole 45A penetrates the portion of the first lid portion 44 facing each first bolt hole 41C in the Z direction.
- the motor stator support 42 is provided on an inner peripheral surface 41c of the housing main body 41.
- the motor stator support 42 is configured integrally with the housing main body 41.
- the motor stator support 42 protrudes radially inward from the inner peripheral surface 41c of the housing main body 41.
- the motor stator support 42 is a member that supports a lower surface 59a side of the motor stator 59.
- the motor stator support 42 has an upper surface 42a and a fifth bolt hole 42B.
- the upper surface 42a is a plane orthogonal to the Z direction.
- the upper surface 42a is in contact with the lower surface 59a of the motor stator 59. Accordingly, the motor stator support 42 supports the lower surface 59a of the motor stator 59.
- the first compression mechanism support 43 is provided on the inner peripheral surface 41c of the housing main body 41.
- the first compression mechanism support 43 is configured integrally with the housing main body 41.
- the first compression mechanism support 43 protrudes radially inward from the inner peripheral surface 41c of the housing main body 41.
- the shape of the first compression mechanism support 43 can be, for example, a C shape when viewed from the Z direction.
- the first compression mechanism support 43 has a lower surface 43b and a third bolt hole 43A.
- the lower surface 43b is a plane orthogonal to the Z direction.
- the lower surface 43b is a surface against which a support 76 constituting the first compression mechanism 18 abuts.
- the housing main body 41, the motor stator support 42, the first compression mechanism support 43, the first lid portion 44, and the second lid portion 45 described above, for example, cast products may be used.
- the housing main body 41, the motor stator support 42, the first compression mechanism support 43, the first lid portion 44, and the second lid portion 45 By using the cast products as the housing main body 41, the motor stator support 42, the first compression mechanism support 43, the first lid portion 44, and the second lid portion 45 in this way, the housing main body 41, the motor stator support 42, the first compression mechanism support 43, the first lid portion 44, and the second lid portion 45 having complicated shapes can be easily formed.
- a plurality of the third bolt holes 43A are formed at a lower end portion of the first compression mechanism support 43.
- the plurality of third bolt holes 43A are disposed at intervals in the circumferential direction of the first compression mechanism support 43.
- Each third bolt hole 43A is formed so as to extend upward (the other side in the axis direction) from the lower surface 43b.
- a plurality of the fifth bolt holes 42B are formed at an upper end portion of the motor stator support 42.
- the plurality of fifth bolt holes 42B are disposed at intervals in the circumferential direction of the motor stator support 42.
- Each fifth bolt hole 42B is formed so as to extend downward (one side in the axis direction) from the upper surface 42a.
- the first bolt 46 is fastened to the bolt hole 44 and the first bolt hole 41C from one side in the axis direction. Accordingly, the first lid portion 44 is fixed to the housing main body 41 in a state of being detachable from the housing main body 41 by a plurality of the first bolts 46.
- the first lid portion 44 By fixing the first lid portion 44 to the housing main body 41 using the first bolts 46 from one side in the axis direction in this way, the first lid portion 44 can be easily attached to and detached from the housing main body 41.
- the maintenance of the lower bearing portion 15 and the oil supply pump 17 (components of the compressor 10 housed in the housing 11) disposed at the bottom portion in the housing 11 can be easily performed.
- the second bolt 47 is fastened to the bolt hole 45A and the second bolt hole 41D from the other side in the axis direction. Accordingly, the second lid portion 45 is fixed to the housing main body 41 in a state of being detachable from the housing main body 41 by a plurality of second bolts 47.
- the second lid portion 45 By fixing the second lid portion 45 to the housing main body 41 using the second bolts 47 from the other side in the axis direction in this way, the second lid portion 45 can be easily attached to and detached from the housing main body 41.
- the rotary shaft 13 is housed in the housing 11 in a state of extending in the Z direction.
- the rotary shaft 13 has a rotary shaft main body 55 and an eccentric shaft portion 56.
- the rotary shaft main body 55 has a columnar shape and rotates around the axis O 1 .
- the rotary shaft main body 55 has an upper end portion 55A and a lower end portion 55B.
- the lower end portion 55B penetrates the first compression mechanism 18 in the Z direction.
- the rotary shaft main body 55 having the above configuration is supported in a state of being rotatable by the lower bearing portion 15, a first bearing portion 75 constituting the first compression mechanism 18, and a second bearing portion 72 constituting the second compression mechanism 21.
- the eccentric shaft portion 56 is provided at an upper end of the rotary shaft main body 55.
- the eccentric shaft portion 56 has the axis O 2 offset (eccentric) with respect to the axis O 1 as a central axis.
- the eccentric shaft portion 56 is a columnar shaft smaller than the outer diameter of the rotary shaft main body 55.
- the eccentric shaft portion 56 When the rotary shaft main body 55 rotates around the axis O 1 , the eccentric shaft portion 56 having such a configuration revolves around the axis O 1 to orbit an orbiting scroll 86 constituting the second compression mechanism 21.
- the lower bearing portion 15 is fixed to a lower side of the first compression mechanism 18.
- the lower bearing portion 15 rotatably supports an end portion of the rotary shaft 13 on one side in the axis direction (end portion of the rotary shaft main body 55 on one side in the axis direction).
- the oil supply pump 17 is internally provided in the lower bearing portion 15.
- the oil supply pump 17 supplies a part of the oil 38 reserved at the bottom portion 11A in the housing 11 to a scroll compression portion 79 via a through-hole (not shown) formed in the rotary shaft 13.
- the first compression mechanism 18 is housed at the bottom portion in the housing 11.
- the first compression mechanism 18 includes the first bearing portion 75, and the two-cylinder rotary compression portion 78 that is a first compression portion.
- the first bearing portion 75 includes a support 76 and a bearing main body 77.
- the support 76 is a disk-shaped member.
- the support 76 includes an outer portion 76A that comes into contact with the first compression mechanism support 43, an inner portion 76B that is disposed inside the outer portion 76A, a step portion 76C, an insertion hole 76D, and a bolt hole 76E.
- the outer portion 76A has an upper surface 76Aa that comes into contact with a lower surface 43b of the first compression mechanism support 43.
- the upper surface 76Aa is a plane orthogonal to the Z direction.
- the step portion 76C is formed on an upper surface side of a boundary portion between the outer portion 76A and the inner portion 76B.
- the first bearing portion 75 can be disposed at a desired position in the radial direction by the step portion 76C.
- the insertion hole 76D is formed so as to penetrate the center of the inner portion in the Z direction.
- the insertion hole 76D is a hole for inserting a lower end portion side of the rotary shaft main body 55.
- the bolt hole 76E is formed so as to penetrate the outer portion 76A facing the third bolt hole 42A in the Z direction.
- the bearing main body 77 is provided on an inner peripheral surface of the support 76 that partitions the insertion hole 76D.
- the bearing main body 77 is disposed between an outer peripheral surface of the rotary shaft main body 55 and the support 76 in the radial direction.
- the bearing main body 77 supports one end portion of the rotary shaft main body 55 in a rotatable state.
- the two-cylinder rotary compression portion 78 is disposed at the bottom portion 11A in the housing 11 and is immersed in the oil reservoir 39.
- the two-cylinder rotary compression portion 78 is fixed to a lower side of the first bearing portion 75. Accordingly, the first bearing portion 75 and the two-cylinder rotary compression portion 78 are configured integrally with each other.
- the two-cylinder rotary compression portion 78 includes a first rotary compression portion 81 and a second rotary compression portion 82.
- a gas-phase refrigerant (hereinafter, simply referred to as "refrigerant") is supplied to the first rotary compression portion 81 and the second rotary compression portion 82 from an accumulator (not shown) that separates the refrigerant into gas and liquid.
- the first rotary compression portion 81 and the second rotary compression portion 82 compress the refrigerant supplied from the accumulator.
- the second rotary compression portion 82 is disposed to be stacked on the first rotary compression portion 81.
- the refrigerants compressed by the first rotary compression portion 81 and the second rotary compression portion 82, respectively, are supplied to the second compression mechanism 21 disposed above the two-cylinder rotary compression portion 78.
- the third bolt 19 is fastened to the bolt hole 76E and the third bolt hole 42A from one side in the axis direction.
- the maintenance of the first compression mechanism 18 and the components of the compressor 10 disposed on the first compression mechanism 18 side and housed in the housing 11 can be easily performed.
- the second compression mechanism 21 is housed in an upper portion of the housing 11.
- the second compression mechanism 21 has the second bearing portion 72, and the scroll compression portion 79 that is a second compression portion.
- the second bearing portion 72 has a support 61 and a bearing main body 62.
- the support 61 is a member that supports the bearing main body 62, and is housed in the housing 11.
- the support 61 is fixed to the housing main body 41 in a state of coming into contact with the inner portion of the upper end surface 41a of the housing main body 41.
- the support 61 is formed with a recessed portion 64, a through-hole 65, and a bolt hole 66.
- the recessed portion 64 is formed at a central portion on an upper side of the support 61 facing the second lid portion 45.
- the recessed portion 64 is recessed in a direction from the second lid portion 45 toward the first lid portion 44.
- the recessed portion 64 is a columnar space.
- the through-hole 65 is formed at a central portion on a lower side of the support 61 facing the first lid portion 44. An upper end side of the through-hole 65 communicates with the recessed portion 64.
- the through-hole 65 is a hole having a columnar shape. The opening diameter of the through-hole 65 is smaller than the opening diameter of the recessed portion 64.
- the upper end portion 55A of the rotary shaft main body 55 is disposed in the through-hole 65.
- the bolt hole 66 is formed so as to penetrate the support 61 facing the fourth bolt hole 41F in the Z direction.
- the bearing main body 62 is provided on a surface of the support 61 that partitions the through-hole 65.
- the bearing main body 62 faces an outer peripheral surface of the upper end portion 55A of the rotary shaft main body 55.
- the bearing main body 62 supports the radial direction of the rotary shaft main body 55 in a rotatable state.
- the scroll compression portion 79 is provided at the upper portion in the housing 11 and is disposed between the cover 31 and the motor 23.
- the scroll compression portion 79 has a fixed scroll 85 and an orbiting scroll 86.
- the fixed scroll 85 is disposed between the cover 31 and the orbiting scroll 86.
- the fixed scroll 85 has an end plate 85A and a fixed wrap 85B.
- the end plate 85A has a disk shape.
- the end plate 85A is fixed on the second bearing portion 72 constituting the second compression mechanism 21.
- the end plate 85A has an upper surface, a lower surface, and a discharge port 85C.
- the discharge port 85C is formed so as to extend in the Z direction so as to penetrate the center of the end plate 85A.
- the discharge port 85C is a through-hole for discharging the refrigerant compressed by the scroll compression portion 79 to the outside of the scroll compression portion 79.
- the fixed wrap 85B protrudes downward from a lower surface of the end plate 85A.
- the fixed wrap 85B is a wall body formed in a scroll shape when viewed from the direction of the axis O 1 .
- the orbiting scroll 86 is disposed between the fixed scroll 85 and the second bearing portion 72.
- the orbiting scroll 86 has an end plate 86A, an orbiting wrap 86B, and a boss part 86C.
- the end plate 86A has a disk shape.
- the end plate 86A is disposed on the support 61 via the thrust plate 29.
- the end plate 86A is disposed to face the end plate 85A in the Z direction.
- the end plate 86A has an upper surface, and a lower surface facing the upper surface of the end plate 85A.
- the orbiting wrap 86B is provided on the upper surface of the end plate 86A and protrudes upward.
- the orbiting wrap 86B is a wall body formed in a scroll shape when viewed from the direction of the axis O 1 .
- the orbiting wrap 86B having the above configuration is disposed so as to mesh with the fixed wrap 85B. Accordingly, a compression chamber for compressing the refrigerant is formed between the orbiting wrap 86B and the fixed wrap 85B. Then, as the orbiting wrap 86B orbits with respect to the fixed scroll 85, the volume of the compression chamber changes, and the refrigerant in the compression chamber is compressed.
- the boss part 86C is provided on the lower surface of the end plate 86A and protrudes downward.
- the boss part 86C is a member having a cylindrical shape, and a lower side thereof is disposed in the recessed portion 64.
- the scroll compression portion 79 having the above configuration further compresses the refrigerant compressed by the two-cylinder rotary compression portion 78.
- the fourth bolt 22 is fastened to the bolt hole 66 and the fourth bolt hole 41F from the other side in the axis direction.
- the fourth bolt 22 is a bolt for fixing the second compression mechanism 21 to the motor stator support 42 in a state where the second compression mechanism 21 is detachable from the motor stator support 42 (housing 11).
- the maintenance of the second compression mechanism 21 and the components of the compressor 10 disposed on the second compression mechanism 21 side and housed in the housing 11 can be easily performed.
- the motor 23 is housed in the housing 11 and has a motor rotor 58 and a motor stator 59.
- the motor rotor 58 is fixed to an outer peripheral surface located at an intermediate region of the rotary shaft main body 55 in the Z direction.
- the motor rotor 58 rotates together with the rotary shaft 13.
- the motor stator 59 is disposed on the motor stator support 42 such that an outer portion of the lower surface 59a of the motor stator 59 comes into contact with the upper surface 42a of the motor stator support 42.
- the motor stator 59 is disposed outside the motor rotor 58 so as to face an outer peripheral surface of the motor rotor 58.
- a plurality of bolt holes 59A are formed in the motor stator 59.
- Each bolt hole 59A is formed in the motor stator 59 facing each fifth bolt hole 42B in the Z direction.
- the bolt hole 59A penetrates the motor stator 59 in the Z direction.
- the fifth bolt 24 is fastened to the bolt hole 59A and the fifth bolt hole 42B from the other side in the axis direction.
- the fifth bolt 24 is a bolt for fixing the motor stator 59 to the motor stator support 42.
- the motor stator 59 can be easily positioned in the Z direction when the motor stator 59 is installed in the housing 11.
- the bush assembly 27 is provided between the orbiting scroll 86 and the rotary shaft 13.
- the bush assembly 27 connects the orbiting scroll 86 and the rotary shaft 13 to each other.
- the bush assembly 27 has a bush 27A provided between the eccentric shaft portion 56 and the boss part 86C.
- the thrust plate 29 is provided between the end plate 86A and the second bearing portion 72.
- the thrust plate 29 is a member for holding a thrust load generated in the orbiting scroll 86.
- the Oldham ring 30 is provided between the end plate 86A and the end plate 85A.
- the Oldham ring 30 has a protrusion fitted into grooves (not shown) formed in the end plate 86A and the end plate 85A.
- the Oldham ring 30 is a member for suppressing the rotation of the orbiting scroll 86 (rotation around the axis O 2 ) and converting the rotary motion of the rotary shaft main body 55 into an orbiting motion.
- the cover 31 is housed in the housing 11 and is provided on the upper surface of the end plate 85A.
- the cover 31 forms a discharge chamber 31A between an inner surface of the cover 31 and the upper surface of the end plate 85A.
- the discharge pipe 35 is provided in the housing 11 in a state of communicating with the discharge chamber 31A.
- the discharge pipe 35 discharges the refrigerant compressed by the compressor 10 to the outside of the compressor 10.
- the compressor 10 of the present embodiment by fixing the first lid portion 44 to the housing main body 41 in a detachable state with the first bolts 46 from one side in the axis direction and by fixing the first compression mechanism 18 to the housing main body 41 with the third bolt 19 from one side in the axis direction, it is possible to remove the first lid portion 44 from the housing main body 41 and then remove the first compression mechanism 18 from the housing main body 41.
- the maintenance of the first compression mechanism 18 and the components of the compressor 10 disposed on the first compression mechanism 18 side and housed in the housing 11 can be easily performed.
- the maintenance of the second compression mechanism 21 and the components of the compressor 10 disposed on the second compression mechanism 21 side and housed in the housing 11 can be easily performed.
- the maintenance of the components of the compressor 10 housed in the housing 11 including the first and second compression mechanisms 18 and 21 can be easily performed.
- a vertical compressor in which the housing 11 and the rotary shaft 13 extend in the vertical direction has been described as an example.
- the present invention is also applicable to a horizontal compressor in which the housing 11 and the rotary shaft 13 extends in a horizontal direction orthogonal to the vertical direction.
- the present invention is applicable to compressors. Reference Signs List
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- Engineering & Computer Science (AREA)
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Description
- The present invention relates to a compressor.
- As a compressor, for example, there is a compressor disclosed in
PTL 1. - The compressor disclosed in
PTL 1 includes a housing, a rotary shaft, a scroll compression mechanism, and a motor. - The housing extends in a vertical direction. The housing has a tubular housing main body, a first lid portion that closes a lower end of the housing main body, and a second lid portion that closes an upper end of the housing main body. The first and second lid portions are respectively fixed to the housing main body by a welding method.
- The rotary shaft is housed in the housing and extends in the vertical direction.
- The scroll compression mechanism is housed at an upper portion in the
housing 11. The scroll compression mechanism has a scroll compression portion and a bearing portion. The scroll compression mechanism is provided at an upper end portion of the rotary shaft. - The motor is housed in the housing and drives the scroll compression portion by rotating the rotary shaft.
- [PTL 1]
Japanese Unexamined Patent Application, First Publication No. 2005-180180 - However, as in
PTL 1, when the second lid portion and the first lid portion are fixed to the housing main body by using the welding method, there is a possibility that it is difficult to easily perform the maintenance of the components of the compressor housed in the housing including the scroll compression portion. - Thus, an object of the present invention is to provide a compressor capable of easily performing the maintenance of components of a compressor housed in a housing including a compression mechanism.
- In order to solve the above problems, a compressor according to the subject-matter of
claim 1 is provided. - According to the present invention, by forming the bolt hole for fastening the fourth bolt and the bolt hole for fastening the second bolt on the same end surface (same plane) in this way, these bolt holes can be easily formed, and the number of flattened parts can be reduced.
- According to the present invention, by including the first lid portion fixed to the housing main body by the first bolt from the one side in the axis direction to close the first open end and the first compression mechanism fixed to the housing main body by the third bolt from the one side in the axis direction, it is possible to easily attach and detach the first lid portion and the first compression mechanism with respect to the housing main body.
- Accordingly, the maintenance of the first compression mechanism and the components of the compressor disposed on the first compression mechanism side and housed in the housing can be easily performed.
- Additionally, by including the second lid portion fixed to the housing main body by the second bolt from the other side in the axis direction to close the second open end and the second compression mechanism fixed to the housing main body by the fourth bolt from the other side in the axis direction, it is possible to easily attach and detach the second lid portion and the second compression mechanism with respect to the housing main body.
- Accordingly, the maintenance of the second compression mechanism and the components of the compressor disposed on the second compression mechanism side and housed in the housing can be easily performed.
- That is, the maintenance of the components of the compressor housed in the housing including the first and second compression mechanisms can be easily performed.
- Additionally, in the compressor according to the one aspect of the present invention, the first compression mechanism includes a first bearing portion that rotatably supports one end portion of the rotary shaft, and a first compression portion that is fixed to the first bearing portion and compresses the refrigerant, and the first bearing portion is fixed to the housing main body by the third bolt.
- In this way, by configuring the first compression mechanism to have the first bearing portion and the first compression portion and fixing the first bearing portion to the housing main body by the third bolt, the first bearing portion and the first compression portion can be attached and detached as one structure.
- Additionally, in the compressor according to the one aspect of the present invention, the second compression mechanism may include a second bearing portion that rotatably supports the other end portion of the rotary shaft, and a second compression portion that is fixed to the second bearing portion and compresses the refrigerant, and the second bearing portion may be fixed to the housing main body by the fourth bolt.
- In this way, by configuring the second compression mechanism to have the second bearing portion and the second compression portion and fixing the second bearing portion to the housing main body by the fourth bolt, the second bearing portion and the second compression portion can be attached and detached as one structure.
- Additionally, in the compressor according to one aspect of the present invention, the housing may extend in a vertical direction, the first compression portion may be a rotary compression portion that is disposed at a bottom portion in the housing, and the second compression portion may be a scroll compression portion that is disposed at an upper portion in the housing.
- In this way, the invention may be applied to a vertical compressor having the rotary compression portion as the first compression portion, the scroll compression portion as the second compression portion, and the housing extending in the vertical direction.
- [0020] Additionally, in the compressor according to the one aspect of the present invention, the housing may have a motor stator support that protrudes radially inward from an inner peripheral surface of the housing main body and supports a lower surface of the motor stator, and the motor stator is fixed to the motor stator support by a fifth bolt from the other side in the axis direction.
- By having the motor stator support and the fifth bolt having such a configuration, the motor stator in the axis direction can be easily positioned when the motor stator is installed in the housing.
- Additionally, in the compressor according to one aspect of the present invention, the housing may include a first compression mechanism support that is configured integrally with the housing main body and protrudes radially inward from an inner peripheral surface of the housing main body,
- the first compression mechanism support may include a third bolt hole to which the third bolt is fastened, and
- the housing main body may include a lower end surface (first end surface) that is disposed on the one side in the axis direction and a first bolt hole which is formed in the first end surface and to which the first bolt is fastened.
- Additionally, in the compressor according to one aspect of the present invention, the motor stator support may be configured integrally with the housing main body, and the housing main body, the motor stator support, the first lid portion, and the second lid portion may be cast products.
- By using the cast products as the housing main body, the motor stator support, the first lid portion, and the second lid portion in this way, the housing main body, the motor stator support, the first lid portion, and the second lid portion having complicated shapes can be easily formed.
- According to the present invention, the maintenance of the components of the compressor housed in the housing including the first and second compression mechanisms can be easily performed.
-
-
Fig. 1 is a cross-sectional view schematically showing a compressor according to an embodiment of the present invention. -
Fig. 2 is an enlarged cross-sectional view of a portion of the compressor shown inFig. 1 surrounded by a region A. -
Fig. 3 is an enlarged cross-sectional view of a portion of the compressor shown inFig. 1 surrounded by a region B. -
Fig. 4 is an enlarged cross-sectional view of a portion of the compressor shown inFig. 1 surrounded by a region C. - Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings.
- A
compressor 10 according to an embodiment of the present invention will be described with reference toFigs. 1 to 4 . - In
Fig. 1 , O1 represents an axis of a rotary shaft main body 55 (hereinafter, referred to as "axis O1"), and O2 represents indicates an axis of the eccentric shaft portion 56 (hereinafter, referred to as "axis O2"). - Additionally, in
Fig. 1 , an X direction indicates a radial direction of thecompressor 10, a Z direction indicates an axis direction (vertical direction) orthogonal to the X direction, and A to C indicate regions, respectively. - Additionally, in
Fig. 1 , a lower side of a paper surface indicates one side in a direction of the axis O1 (hereinafter, referred to as "one side in the axis direction"), and an upper side of the paper surface indicates the other side in the direction of the axis O1 (hereinafter, referred to as "the other side in the axis direction"). InFig. 1 , a two-cylinderrotary compression portion 78 is taken as an example of a first compression portion constituting afirst compression mechanism 18. - In
Fig. 2 , D represents a region (hereinafter referred to as "inner region D") of anupper end surface 41a where afourth bolt hole 41F is formed, and E represents a region (hereinafter, referred to as "outer region E") of theupper end surface 41a which is disposed outside the inner region D and where thesecond bolt hole 41D is formed. - In
Figs. 1 to 4 , the same components are designated by the same reference signs. - The
compressor 10 includes ahousing 11, arotary shaft 13, alower bearing portion 15, anoil supply pump 17, afirst compression mechanism 18, athird bolt 19, asecond compression mechanism 21, afourth bolt 22, amotor 23, afifth bolt 24, andischarge valve 26, abush assembly 27, athrust plate 29, an Oldhamring 30, acover 31, and adischarge pipe 35. - The
housing 11 has a semi-sealed structure. Anoil reservoir 39 formed by accumulation ofoil 38 is disposed at abottom portion 11A in thehousing 11. - The
housing 11 includes a housingmain body 41, amotor stator support 42, a first compression mechanism support 43, afirst lid portion 44, asecond lid portion 45, afirst bolt 46, and asecond bolt 47. - The housing
main body 41 is formed in a tubular shape and extends in the Z direction. The housingmain body 41 has a firstopen end 41A disposed on one side in the axis direction, a secondopen end 41B disposed on the other side in the axis direction, afirst bolt hole 41C, asecond bolt hole 41D, and afourth bolt hole 41F. - The housing
main body 41 has anupper end surface 41a (end surface) disposed on the other side in the axis direction and alower end surface 41b disposed on one side in the axis direction. Theupper end surface 41a and thelower end surface 41b are planes orthogonal to the Z direction. - A plurality of the
first bolt holes 41C are formed at a lower end portion of the housingmain body 41. Eachfirst bolt hole 41C is formed so as to extend upward (the other side in the axis direction) from thelower end surface 41b. The plurality of first bolt holes 41C are disposed at intervals in a circumferential direction of the housingmain body 41. - A plurality of the second bolt holes 41D are formed at an upper end portion of the housing
main body 41. The plurality of second bolt holes 41D are disposed at intervals in the circumferential direction of the housingmain body 41. Eachsecond bolt hole 41D is formed so as to extend downward (one side in the axis direction) from theupper end surface 41a. - A plurality of the fourth bolt holes 41F are formed in an inner region D disposed inside an outer region E where the second bolt holes 41D are formed, in the upper end portion of the housing
main body 41. - The plurality of fourth bolt holes 41F are disposed at intervals in the circumferential direction of the housing
main body 41. Thefourth bolt hole 41F is formed so as to extend downward (one side in the axis direction) from theupper end surface 41a. - That is, the plurality of second and fourth bolt holes 41D and 41F are formed on the
upper end surface 41a that is the same plane. - In this way, by forming the plurality of second and fourth bolt holes 41D and 41F on the
upper end surface 41a that is the same plane, the plurality of second and fourth bolt holes 41D and 41F can be easily formed, and the number of flattened parts can be reduced. - The
first lid portion 44 is disposed directly below the housingmain body 41 so as to come into contact with thelower end surface 41b. Thefirst lid portion 44 closes the firstopen end 41A. - A plurality of
bolt holes 44A are formed in thefirst lid portion 44. Eachbolt hole 44A is formed so as to penetrate a portion of thefirst lid portion 44 facing thefirst bolt hole 41C in the Z direction. - The
second lid portion 45 is disposed on the housingmain body 41. Thesecond lid portion 45 comes into contact with the outer region E of theupper end surface 41a where the plurality of second bolt holes 41D are formed and exposes the inner region D of theupper end surface 41a where the plurality of fourth bolt holes 41F are formed. Thesecond lid portion 45 closes the secondopen end 41B. - The
second lid portion 45 has a plurality ofbolt holes 45A and a dischargepipe mounting portion 45B. Eachbolt hole 45A penetrates the portion of thefirst lid portion 44 facing eachfirst bolt hole 41C in the Z direction. - The
motor stator support 42 is provided on an innerperipheral surface 41c of the housingmain body 41. Themotor stator support 42 is configured integrally with the housingmain body 41. Themotor stator support 42 protrudes radially inward from the innerperipheral surface 41c of the housingmain body 41. - The
motor stator support 42 is a member that supports alower surface 59a side of themotor stator 59. Themotor stator support 42 has anupper surface 42a and afifth bolt hole 42B. - The
upper surface 42a is a plane orthogonal to the Z direction. Theupper surface 42a is in contact with thelower surface 59a of themotor stator 59. Accordingly, themotor stator support 42 supports thelower surface 59a of themotor stator 59. - The first
compression mechanism support 43 is provided on the innerperipheral surface 41c of the housingmain body 41. The firstcompression mechanism support 43 is configured integrally with the housingmain body 41. The firstcompression mechanism support 43 protrudes radially inward from the innerperipheral surface 41c of the housingmain body 41. - The shape of the first
compression mechanism support 43 can be, for example, a C shape when viewed from the Z direction. - The first
compression mechanism support 43 has alower surface 43b and athird bolt hole 43A. Thelower surface 43b is a plane orthogonal to the Z direction. Thelower surface 43b is a surface against which asupport 76 constituting thefirst compression mechanism 18 abuts. - As the housing
main body 41, themotor stator support 42, the firstcompression mechanism support 43, thefirst lid portion 44, and thesecond lid portion 45 described above, for example, cast products may be used. - By using the cast products as the housing
main body 41, themotor stator support 42, the firstcompression mechanism support 43, thefirst lid portion 44, and thesecond lid portion 45 in this way, the housingmain body 41, themotor stator support 42, the firstcompression mechanism support 43, thefirst lid portion 44, and thesecond lid portion 45 having complicated shapes can be easily formed. - A plurality of the third bolt holes 43A are formed at a lower end portion of the first
compression mechanism support 43. The plurality of third bolt holes 43A are disposed at intervals in the circumferential direction of the firstcompression mechanism support 43. Eachthird bolt hole 43A is formed so as to extend upward (the other side in the axis direction) from thelower surface 43b. - A plurality of the fifth bolt holes 42B are formed at an upper end portion of the
motor stator support 42. The plurality of fifth bolt holes 42B are disposed at intervals in the circumferential direction of themotor stator support 42. Eachfifth bolt hole 42B is formed so as to extend downward (one side in the axis direction) from theupper surface 42a. - The
first bolt 46 is fastened to thebolt hole 44 and thefirst bolt hole 41C from one side in the axis direction. Accordingly, thefirst lid portion 44 is fixed to the housingmain body 41 in a state of being detachable from the housingmain body 41 by a plurality of thefirst bolts 46. - By fixing the
first lid portion 44 to the housingmain body 41 using thefirst bolts 46 from one side in the axis direction in this way, thefirst lid portion 44 can be easily attached to and detached from the housingmain body 41. - Accordingly, the maintenance of the
lower bearing portion 15 and the oil supply pump 17 (components of thecompressor 10 housed in the housing 11) disposed at the bottom portion in thehousing 11 can be easily performed. - The
second bolt 47 is fastened to thebolt hole 45A and thesecond bolt hole 41D from the other side in the axis direction. Accordingly, thesecond lid portion 45 is fixed to the housingmain body 41 in a state of being detachable from the housingmain body 41 by a plurality ofsecond bolts 47. - By fixing the
second lid portion 45 to the housingmain body 41 using thesecond bolts 47 from the other side in the axis direction in this way, thesecond lid portion 45 can be easily attached to and detached from the housingmain body 41. - Accordingly, the maintenance of the components of the
compressor 10 disposed at the upper portion in thehousing 11 can be easily performed. - The
rotary shaft 13 is housed in thehousing 11 in a state of extending in the Z direction. Therotary shaft 13 has a rotary shaftmain body 55 and aneccentric shaft portion 56. - The rotary shaft
main body 55 has a columnar shape and rotates around the axis O1. The rotary shaftmain body 55 has anupper end portion 55A and alower end portion 55B. Thelower end portion 55B penetrates thefirst compression mechanism 18 in the Z direction. - The rotary shaft
main body 55 having the above configuration is supported in a state of being rotatable by thelower bearing portion 15, afirst bearing portion 75 constituting thefirst compression mechanism 18, and asecond bearing portion 72 constituting thesecond compression mechanism 21. - The
eccentric shaft portion 56 is provided at an upper end of the rotary shaftmain body 55. Theeccentric shaft portion 56 has the axis O2 offset (eccentric) with respect to the axis O1 as a central axis. Theeccentric shaft portion 56 is a columnar shaft smaller than the outer diameter of the rotary shaftmain body 55. - When the rotary shaft
main body 55 rotates around the axis O1, theeccentric shaft portion 56 having such a configuration revolves around the axis O1 to orbit an orbiting scroll 86 constituting thesecond compression mechanism 21. - The
lower bearing portion 15 is fixed to a lower side of thefirst compression mechanism 18. Thelower bearing portion 15 rotatably supports an end portion of therotary shaft 13 on one side in the axis direction (end portion of the rotary shaftmain body 55 on one side in the axis direction). - The
oil supply pump 17 is internally provided in thelower bearing portion 15. Theoil supply pump 17 supplies a part of theoil 38 reserved at thebottom portion 11A in thehousing 11 to ascroll compression portion 79 via a through-hole (not shown) formed in therotary shaft 13. - The
first compression mechanism 18 is housed at the bottom portion in thehousing 11. Thefirst compression mechanism 18 includes thefirst bearing portion 75, and the two-cylinderrotary compression portion 78 that is a first compression portion. - The
first bearing portion 75 includes asupport 76 and a bearing main body 77. Thesupport 76 is a disk-shaped member. - The
support 76 includes anouter portion 76A that comes into contact with the firstcompression mechanism support 43, aninner portion 76B that is disposed inside theouter portion 76A, astep portion 76C, aninsertion hole 76D, and abolt hole 76E. - The
outer portion 76A has an upper surface 76Aa that comes into contact with alower surface 43b of the firstcompression mechanism support 43. The upper surface 76Aa is a plane orthogonal to the Z direction. - An upper surface of the
inner portion 76B protrudes upward from the upper surface 76Aa of theouter portion 76A. Accordingly, thestep portion 76C is formed on an upper surface side of a boundary portion between theouter portion 76A and theinner portion 76B. - By forming the
step portion 76C between the upper surface 76Aa of theouter portion 76A, which comes into contact with thelower surface 43b of the firstcompression mechanism support 43, and the upper surface of theinner portion 76B in this way, thefirst bearing portion 75 can be disposed at a desired position in the radial direction by thestep portion 76C. - The
insertion hole 76D is formed so as to penetrate the center of the inner portion in the Z direction. Theinsertion hole 76D is a hole for inserting a lower end portion side of the rotary shaftmain body 55. - The
bolt hole 76E is formed so as to penetrate theouter portion 76A facing thethird bolt hole 42A in the Z direction. - The bearing main body 77 is provided on an inner peripheral surface of the
support 76 that partitions theinsertion hole 76D. The bearing main body 77 is disposed between an outer peripheral surface of the rotary shaftmain body 55 and thesupport 76 in the radial direction. The bearing main body 77 supports one end portion of the rotary shaftmain body 55 in a rotatable state. - The two-cylinder
rotary compression portion 78 is disposed at thebottom portion 11A in thehousing 11 and is immersed in theoil reservoir 39. - The two-cylinder
rotary compression portion 78 is fixed to a lower side of thefirst bearing portion 75. Accordingly, thefirst bearing portion 75 and the two-cylinderrotary compression portion 78 are configured integrally with each other. - The two-cylinder
rotary compression portion 78 includes a firstrotary compression portion 81 and a secondrotary compression portion 82. - A gas-phase refrigerant (hereinafter, simply referred to as "refrigerant") is supplied to the first
rotary compression portion 81 and the secondrotary compression portion 82 from an accumulator (not shown) that separates the refrigerant into gas and liquid. The firstrotary compression portion 81 and the secondrotary compression portion 82 compress the refrigerant supplied from the accumulator. - The second
rotary compression portion 82 is disposed to be stacked on the firstrotary compression portion 81. The refrigerants compressed by the firstrotary compression portion 81 and the secondrotary compression portion 82, respectively, are supplied to thesecond compression mechanism 21 disposed above the two-cylinderrotary compression portion 78. - The
third bolt 19 is fastened to thebolt hole 76E and thethird bolt hole 42A from one side in the axis direction. - By fixing the
first compression mechanism 18 to the housingmain body 41 with thethird bolt 19 from one side in the axis direction in this way, it is possible to remove thefirst lid portion 44 from the housingmain body 41 and then remove thefirst compression mechanism 18 from the housingmain body 41. - Accordingly, the maintenance of the
first compression mechanism 18 and the components of thecompressor 10 disposed on thefirst compression mechanism 18 side and housed in thehousing 11 can be easily performed. - The
second compression mechanism 21 is housed in an upper portion of thehousing 11. Thesecond compression mechanism 21 has thesecond bearing portion 72, and thescroll compression portion 79 that is a second compression portion. - The
second bearing portion 72 has asupport 61 and a bearingmain body 62. - The
support 61 is a member that supports the bearingmain body 62, and is housed in thehousing 11. Thesupport 61 is fixed to the housingmain body 41 in a state of coming into contact with the inner portion of theupper end surface 41a of the housingmain body 41. - The
support 61 is formed with a recessedportion 64, a through-hole 65, and abolt hole 66. - The recessed
portion 64 is formed at a central portion on an upper side of thesupport 61 facing thesecond lid portion 45. The recessedportion 64 is recessed in a direction from thesecond lid portion 45 toward thefirst lid portion 44. The recessedportion 64 is a columnar space. - The through-
hole 65 is formed at a central portion on a lower side of thesupport 61 facing thefirst lid portion 44. An upper end side of the through-hole 65 communicates with the recessedportion 64. The through-hole 65 is a hole having a columnar shape. The opening diameter of the through-hole 65 is smaller than the opening diameter of the recessedportion 64. Theupper end portion 55A of the rotary shaftmain body 55 is disposed in the through-hole 65. - The
bolt hole 66 is formed so as to penetrate thesupport 61 facing thefourth bolt hole 41F in the Z direction. - The bearing
main body 62 is provided on a surface of thesupport 61 that partitions the through-hole 65. The bearingmain body 62 faces an outer peripheral surface of theupper end portion 55A of the rotary shaftmain body 55. The bearingmain body 62 supports the radial direction of the rotary shaftmain body 55 in a rotatable state. - The
scroll compression portion 79 is provided at the upper portion in thehousing 11 and is disposed between thecover 31 and themotor 23. - The
scroll compression portion 79 has a fixed scroll 85 and an orbiting scroll 86. - The fixed scroll 85 is disposed between the
cover 31 and the orbiting scroll 86. The fixed scroll 85 has anend plate 85A and afixed wrap 85B. - The
end plate 85A has a disk shape. Theend plate 85A is fixed on thesecond bearing portion 72 constituting thesecond compression mechanism 21. - The
end plate 85A has an upper surface, a lower surface, and adischarge port 85C. Thedischarge port 85C is formed so as to extend in the Z direction so as to penetrate the center of theend plate 85A. - The
discharge port 85C is a through-hole for discharging the refrigerant compressed by thescroll compression portion 79 to the outside of thescroll compression portion 79. - The fixed
wrap 85B protrudes downward from a lower surface of theend plate 85A. The fixedwrap 85B is a wall body formed in a scroll shape when viewed from the direction of the axis O1. - The orbiting scroll 86 is disposed between the fixed scroll 85 and the
second bearing portion 72. The orbiting scroll 86 has an end plate 86A, anorbiting wrap 86B, and aboss part 86C. - The end plate 86A has a disk shape. The end plate 86A is disposed on the
support 61 via thethrust plate 29. The end plate 86A is disposed to face theend plate 85A in the Z direction. The end plate 86A has an upper surface, and a lower surface facing the upper surface of theend plate 85A. - The
orbiting wrap 86B is provided on the upper surface of the end plate 86A and protrudes upward. Theorbiting wrap 86B is a wall body formed in a scroll shape when viewed from the direction of the axis O1. - The
orbiting wrap 86B having the above configuration is disposed so as to mesh with the fixedwrap 85B. Accordingly, a compression chamber for compressing the refrigerant is formed between the orbitingwrap 86B and the fixedwrap 85B. Then, as the orbiting wrap 86B orbits with respect to the fixed scroll 85, the volume of the compression chamber changes, and the refrigerant in the compression chamber is compressed. - The
boss part 86C is provided on the lower surface of the end plate 86A and protrudes downward. Theboss part 86C is a member having a cylindrical shape, and a lower side thereof is disposed in the recessedportion 64. - The
scroll compression portion 79 having the above configuration further compresses the refrigerant compressed by the two-cylinderrotary compression portion 78. - The
fourth bolt 22 is fastened to thebolt hole 66 and thefourth bolt hole 41F from the other side in the axis direction. - The
fourth bolt 22 is a bolt for fixing thesecond compression mechanism 21 to themotor stator support 42 in a state where thesecond compression mechanism 21 is detachable from the motor stator support 42 (housing 11). - By fixing the
second compression mechanism 21 to the housingmain body 41 with thefourth bolt 22 from the other side in the axis direction in this way, it is possible to remove thesecond lid portion 45 from the housingmain body 41 and then remove thesecond compression mechanism 21 from the housingmain body 41. - Accordingly, the maintenance of the
second compression mechanism 21 and the components of thecompressor 10 disposed on thesecond compression mechanism 21 side and housed in thehousing 11 can be easily performed. - The
motor 23 is housed in thehousing 11 and has amotor rotor 58 and amotor stator 59. - The
motor rotor 58 is fixed to an outer peripheral surface located at an intermediate region of the rotary shaftmain body 55 in the Z direction. Themotor rotor 58 rotates together with therotary shaft 13. - The
motor stator 59 is disposed on themotor stator support 42 such that an outer portion of thelower surface 59a of themotor stator 59 comes into contact with theupper surface 42a of themotor stator support 42. Themotor stator 59 is disposed outside themotor rotor 58 so as to face an outer peripheral surface of themotor rotor 58. - A plurality of
bolt holes 59A are formed in themotor stator 59. Eachbolt hole 59A is formed in themotor stator 59 facing eachfifth bolt hole 42B in the Z direction. Thebolt hole 59A penetrates themotor stator 59 in the Z direction. - The
fifth bolt 24 is fastened to thebolt hole 59A and thefifth bolt hole 42B from the other side in the axis direction. Thefifth bolt 24 is a bolt for fixing themotor stator 59 to themotor stator support 42. - By having the
bolt hole 59A formed in themotor stator 59 described above, themotor stator support 42 in which thefifth bolt hole 42B is formed, and thefifth bolt 24, themotor stator 59 can be easily positioned in the Z direction when themotor stator 59 is installed in thehousing 11. - The
bush assembly 27 is provided between the orbiting scroll 86 and therotary shaft 13. Thebush assembly 27 connects the orbiting scroll 86 and therotary shaft 13 to each other. Thebush assembly 27 has abush 27A provided between theeccentric shaft portion 56 and theboss part 86C. - The
thrust plate 29 is provided between the end plate 86A and thesecond bearing portion 72. Thethrust plate 29 is a member for holding a thrust load generated in the orbiting scroll 86. - The
Oldham ring 30 is provided between the end plate 86A and theend plate 85A. TheOldham ring 30 has a protrusion fitted into grooves (not shown) formed in the end plate 86A and theend plate 85A. TheOldham ring 30 is a member for suppressing the rotation of the orbiting scroll 86 (rotation around the axis O2) and converting the rotary motion of the rotary shaftmain body 55 into an orbiting motion. - The
cover 31 is housed in thehousing 11 and is provided on the upper surface of theend plate 85A. Thecover 31 forms a discharge chamber 31A between an inner surface of thecover 31 and the upper surface of theend plate 85A. - When the
discharge port 85C is opened by thedischarge valve 26, the refrigerant compressed by thescroll compression portion 79 is discharged into the discharge chamber 31A. - The
discharge pipe 35 is provided in thehousing 11 in a state of communicating with the discharge chamber 31A. Thedischarge pipe 35 discharges the refrigerant compressed by thecompressor 10 to the outside of thecompressor 10. - According to the
compressor 10 of the present embodiment, by fixing thefirst lid portion 44 to the housingmain body 41 in a detachable state with thefirst bolts 46 from one side in the axis direction and by fixing thefirst compression mechanism 18 to the housingmain body 41 with thethird bolt 19 from one side in the axis direction, it is possible to remove thefirst lid portion 44 from the housingmain body 41 and then remove thefirst compression mechanism 18 from the housingmain body 41. - Accordingly, the maintenance of the
first compression mechanism 18 and the components of thecompressor 10 disposed on thefirst compression mechanism 18 side and housed in thehousing 11 can be easily performed. - Additionally, by fixing the
second lid portion 45 to the housingmain body 41 in a detachable state with thesecond bolts 47 from the other side in the axis direction and by fixing thesecond compression mechanism 21 to the housingmain body 41 with thefourth bolt 22 from the other side in the axis direction, it is possible to remove thesecond lid portion 45 from the housingmain body 41 and then remove thesecond compression mechanism 21 from the housingmain body 41. - Accordingly, the maintenance of the
second compression mechanism 21 and the components of thecompressor 10 disposed on thesecond compression mechanism 21 side and housed in thehousing 11 can be easily performed. - That is, the maintenance of the components of the
compressor 10 housed in thehousing 11 including the first andsecond compression mechanisms - Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and changes can be made within the spirit of the present invention described within the claims.
- In addition, in the present embodiment, as an example of the
compressor 10, a vertical compressor in which thehousing 11 and therotary shaft 13 extend in the vertical direction has been described as an example. However, for example, the present invention is also applicable to a horizontal compressor in which thehousing 11 and therotary shaft 13 extends in a horizontal direction orthogonal to the vertical direction. - Additionally, in the present embodiment, a case where the two-cylinder
rotary compression portion 78 is used as an example of the rotary compression portion has been described as an example. However, instead of this, a single-cylinder rotary compression portion may be used. - The present invention is applicable to compressors. Reference Signs List
-
- 10: Compressor
- 11: Housing
- 11A: Bottom portion
- 13: Rotary shaft
- 15: Lower bearing portion
- 17: Oil supply pump
- 18: First compression mechanism
- 19: Third bolt
- 21: Second compression mechanism
- 22: Fourth bolt
- 23: Motor
- 24: Fifth bolt
- 26: Discharge valve
- 27: Bush assembly
- 27A: Bush
- 29: Thrust plate
- 30: Oldham ring
- 31: Cover
- 31A: Discharge chamber
- 35: Discharge pipe
- 38: Oil
- 39: Oil reservoir
- 41: Housing main body
- 41a: Upper end surface
- 41A: First open end
- 41b: Lower end surface
- 41B: Second open end
- 41C: Inner peripheral surface
- 41C: First bolt hole
- 41D: Second bolt hole
- 41F: Fourth bolt hole
- 42: Motor stator support
- 42a, 76Aa: Upper surface
- 42B: Fifth bolt hole
- 43: First compression mechanism support
- 43A: Third bolt hole
- 43b, 59a: Lower surface
- 44: First lid portion
- 44A, 45A, 59A, 66: Bolt hole
- 45: Second lid portion
- 45B: Discharge pipe mounting portion
- 46: First bolt
- 47: Second bolt
- 55: Rotary shaft main body
- 55A: Upper end portion
- 55B: Lower end portion
- 56: Eccentric shaft portion
- 58: Motor rotor
- 59: Motor stator
- 61, 76: Support
- 62, 77: Bearing main body
- 64: Recessed portion
- 65: Through-hole
- 72: Second bearing portion
- 75: First bearing portion
- 76A: Outer portion
- 76B: Inner portion
- 76C: Step portion
- 76D: Insertion hole
- 76E: Bolt hole
- 78: Two-stage rotary compression portion
- 79: Scroll compression portion
- 81: First rotary compression portion
- 82: Second rotary compression portion
- 85: Fixed scroll
- 85A, 86A: End plate
- 85B: Fixed wrap
- 85c: Discharge port
- 86: Orbiting scroll
- 86B: Orbiting wrap
- 86C: Boss part
- A to C: Region
- D: Inner region
- E: Outer region
- O1, O2: Axis
Claims (7)
- A compressor (10) comprising:a rotary shaft (13) that extends in an axis direction and rotates around an axis;a housing (11) that extends in the axis direction and houses the rotary shaft;a motor (23) having a motor rotor (58) that is provided on an outer peripheral surface of the rotary shaft and a motor stator (59) that is provided in the housing so as to surround the motor rotor;a first compression mechanism (18) that is housed in the housing and is disposed at one end portion of the rotary shaft to compress a refrigerant;wherein the housing has a housing main body (41) formed in a tubular shape and having a first open end (41A) disposed on one side in the axis direction and a second open end (41B) disposed on the other side in the axis direction, a first lid portion (44) fixed to the housing main body by a first bolt (46) from the one side in the axis direction so as to close the first open end, and a second lid portion (45) fixed to the housing main body by a second bolt (47) from the other side in the axis direction so as to close the second open end,the first compression mechanism (18) is fixed to the housing main body by a third bolt (19) from the one side in the axis direction,characterised in that the compressor comprises a second compression mechanism (21) that is housed in the housing and is disposed at the other end portion of the rotary shaft to further compress the refrigerant compressed by the first compression mechanism, and whereinthe second compression mechanism (21) is fixed to the housing main body by a fourth bolt (22) from the other side in the axis direction,
wherein the housing main body (41) has a second end surface (41a) that is disposed on the other side in the axis direction,the second end surface is a plane orthogonal to the axis direction,the second lid portion (45) is in contact with an outer region of the second end surface disposed outside an inner region of the second end surface so as to expose the inner region,a fourth bolt hole (41F) for fastening the fourth bolt (22) is formed in the inner region, anda second bolt hole (41D) for fastening the second bolt (47) is formed in the outer region. - The compressor according to claim 1,wherein the first compression mechanism (18) includes a first bearing portion (75) that rotatably supports one end portion of the rotary shaft, and a first compression portion (78) that is fixed to the first bearing portion and compresses the refrigerant, andwherein the first bearing portion is fixed to the housing main body by the third bolt.
- The compressor according to claim 2,wherein the second compression mechanism (21) includes a second bearing portion (72) that rotatably supports the other end portion of the rotary shaft, and a second compression portion (79) that is fixed to the second bearing portion and compresses the refrigerant, andthe second bearing portion is fixed to the housing main body by the fourth bolt.
- The compressor according to claim 3,wherein the housing (11) extends in a vertical direction,the first compression portion (78) is a rotary compression portion that is disposed at a bottom portion in the housing, andthe second compression portion (79) is a scroll compression portion that is disposed at an upper portion in the housing.
- The compressor according to any one of claims 1 to 4,wherein the housing (11) has a motor stator support (42) that protrudes radially inward from an inner peripheral surface of the housing main body (41) and supports a lower surface of the motor stator (59), andthe motor stator is fixed to the motor stator support by a fifth bolt (24) from the other side in the axis direction.
- The compressor according to claim 5,wherein the motor stator support (42) is configured integrally with the housing main body (41), andthe housing main body, the motor stator support, the first lid portion, and the second lid portion are cast products.
- The compressor according to any one of claims 1 to 6,wherein the housing (11) includes a first compression mechanism support (43) that is configured integrally with the housing main body (41) and protrudes radially inward from an inner peripheral surface (41c) of the housing main body,the first compression mechanism support includes a third bolt hole (43A) to which the third bolt (19) is fastened, andthe housing main body includes a first end surface (41b) that is disposed on the one side in the axis direction and a first bolt hole (41C) which is formed in the first end surface and to which the first bolt is fastened.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2019/014599 WO2020202458A1 (en) | 2019-04-02 | 2019-04-02 | Compressor |
Publications (3)
Publication Number | Publication Date |
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EP3951179A1 EP3951179A1 (en) | 2022-02-09 |
EP3951179A4 EP3951179A4 (en) | 2022-03-23 |
EP3951179B1 true EP3951179B1 (en) | 2024-05-08 |
Family
ID=72666220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19922423.9A Active EP3951179B1 (en) | 2019-04-02 | 2019-04-02 | Compressor |
Country Status (3)
Country | Link |
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EP (1) | EP3951179B1 (en) |
JP (1) | JP7169433B2 (en) |
WO (1) | WO2020202458A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07279865A (en) * | 1994-04-14 | 1995-10-27 | Mitsubishi Heavy Ind Ltd | Scroll-type compressor |
JPH0942174A (en) * | 1995-07-27 | 1997-02-10 | Mitsubishi Heavy Ind Ltd | Scroll compressor |
JP2005069084A (en) * | 2003-08-22 | 2005-03-17 | Sanden Corp | Reed valve of fluid machine |
JP4415178B2 (en) | 2003-12-16 | 2010-02-17 | 日立アプライアンス株式会社 | Scroll fluid machine and assembly method thereof |
JP4350603B2 (en) * | 2004-07-06 | 2009-10-21 | カルソニックカンセイ株式会社 | Gas compressor |
JP2009047039A (en) * | 2007-08-17 | 2009-03-05 | Mitsubishi Heavy Ind Ltd | Multistage compressor |
JP2009115017A (en) | 2007-11-08 | 2009-05-28 | Sanyo Electric Co Ltd | Compressor |
KR101441928B1 (en) | 2012-03-07 | 2014-09-22 | 엘지전자 주식회사 | Horizontal type scroll compressor |
US20150240814A1 (en) | 2014-02-21 | 2015-08-27 | Tecumseh Products Company | Compressor for natural gas |
JP2018123691A (en) | 2017-01-30 | 2018-08-09 | ダイキン工業株式会社 | Compressor |
-
2019
- 2019-04-02 WO PCT/JP2019/014599 patent/WO2020202458A1/en active Application Filing
- 2019-04-02 EP EP19922423.9A patent/EP3951179B1/en active Active
- 2019-04-02 JP JP2021511823A patent/JP7169433B2/en active Active
Also Published As
Publication number | Publication date |
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EP3951179A4 (en) | 2022-03-23 |
JPWO2020202458A1 (en) | 2020-10-08 |
EP3951179A1 (en) | 2022-02-09 |
WO2020202458A1 (en) | 2020-10-08 |
JP7169433B2 (en) | 2022-11-10 |
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