WO2013021545A1 - Élément de volute et machine à fluide du type à volute - Google Patents

Élément de volute et machine à fluide du type à volute Download PDF

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Publication number
WO2013021545A1
WO2013021545A1 PCT/JP2012/004408 JP2012004408W WO2013021545A1 WO 2013021545 A1 WO2013021545 A1 WO 2013021545A1 JP 2012004408 W JP2012004408 W JP 2012004408W WO 2013021545 A1 WO2013021545 A1 WO 2013021545A1
Authority
WO
WIPO (PCT)
Prior art keywords
scroll
wrap
orbiting scroll
end side
thinning
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.)
Ceased
Application number
PCT/JP2012/004408
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English (en)
Japanese (ja)
Inventor
創 佐藤
隆英 伊藤
尚夫 水野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to EP12822800.4A priority Critical patent/EP2740938B1/fr
Publication of WO2013021545A1 publication Critical patent/WO2013021545A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • 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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps
    • F04C18/0276—Different wall heights
    • 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

Definitions

  • the present invention relates to a scroll type fluid machine used as a compressor or an expander.
  • a step portion is provided on each of the distal end side and the proximal end side of the spiral wraps of the pair of fixed scrolls and the orbiting scroll.
  • a compressor has been proposed for three-dimensional compression in the circumferential direction and the height direction of the spiral wrap by making the wrap height higher than the center wrap height on the outer peripheral end side of the spiral wrap than the stepped portion. (For example, Patent Document 1 and Patent Document 2). Since this compressor can be compressed not only in the circumferential direction of the spiral wrap but also in the height direction of the wrap, the displacement can be increased and the compressor capacity can be increased.
  • This compressor called a three-dimensional scroll compressor, can be made smaller and more compact and lighter than a compressor having the same capacity.
  • the scroll compressor performs compression of the fluid in the compression chamber by gradually reducing the volume of the compression chamber formed between the laps by revolving orbiting the orbiting scroll with respect to the fixed scroll.
  • the fixed scroll wrap (fixed wrap) and the orbiting scroll wrap (orbiting wrap) slide, and the fixed wrap receives a load from the orbiting wrap and the orbiting wrap receives the load from the fixed wrap.
  • This load is called tooth surface load.
  • the orbiting scroll 100 (or fixed scroll) is provided with a stepped portion. In particular, as shown in FIG.
  • the present invention has been made based on such a problem, and an object thereof is to provide a scroll member capable of avoiding stress concentration at the base of the stepped portion.
  • An object of this invention is to provide the scroll type fluid machine which can maintain high reliability over a long period of time by providing such a scroll member.
  • the scroll member of the present invention is provided on the end plate, a spiral wrap standing on one side surface of the end plate and extending from the center side toward the outer peripheral end side, and the tip end side of the wrap.
  • a distal end side step portion whose center side is lower than the outer peripheral end side, and a proximal end step portion provided on the proximal end side of the wrap, the center side being higher than the outer peripheral end side.
  • This scroll member can be three-dimensionally compressed in the circumferential direction and the height direction of the wrap.
  • the scroll member is characterized in that a thinning portion is provided in a predetermined meshing range from a lap meshing start position at one or both of the front end side stepped portion and the proximal end stepped portion.
  • the scroll member of the present invention by providing a thinned portion in a predetermined meshing range, it is possible to prevent the counterpart lap from coming into contact with its own lap in the meshing range. By doing so, it is possible to avoid stress concentration at the base of the stepped side portion.
  • the scroll member of the present invention can be applied to one or both of the orbiting scroll and the fixed scroll.
  • the scroll member according to the present invention is applied to the orbiting scroll, it is possible to avoid the fixed scroll lap that is engaged with the other side from contacting the lap of the orbiting scroll at the front end side step portion (base end side step portion).
  • the thinning portion when the thinning portion is provided in the tip side step portion, the thinning portion can be provided in the entire region in the height direction from the tip of the wrap to one side surface of the end plate.
  • the thinned portion can be provided in a specific region from the tip of the wrap to a predetermined position in the height direction.
  • a thinning part can be provided also in the front of the circumferential direction rather than a meshing start position.
  • the thickness reduction part can reduce height as it leaves in the peripheral direction from a meshing start position.
  • the amount of thinning can be reduced as the distance from the meshing start position increases in the circumferential direction, or can decrease as the distance from the tip end of the wrap increases in the height direction.
  • the scroll member of the present invention described above can be applied to a scroll type fluid machine.
  • this scroll type fluid machine is fixed to the housing side, a main shaft rotatably supported in a housing forming an outer shell, a turning scroll rotatably connected to a position offset with respect to the center of the main shaft.
  • a fixed scroll that forms a compression space for compressing fluid between the orbiting scroll and the orbiting scroll, and one or both of the orbiting scroll and the fixed scroll are made of the scroll member described above.
  • the fluid machine of the present invention is implemented as a compressor or an expander, and all are common in that they include the above-described housing, main shaft, orbiting scroll, and fixed scroll.
  • Scroll scroll type fluid machine may be composed of different materials for orbiting scroll and fixed scroll.
  • a lightweight aluminum alloy is used for the orbiting scroll on the moving side, and an iron alloy having high mechanical strength is used for the fixed scroll.
  • an example is shown in which an aluminum alloy is used for the orbiting scroll and an iron alloy is used for the fixed scroll.
  • the orbiting scroll made of a material having high mechanical strength is used.
  • the scroll member of the present invention is provided with a thinned portion, it avoids the stress from concentrating on the base of the stepped portion on the tip side by avoiding the contact of the mating wrap in a predetermined meshing range.
  • a scroll type fluid machine including this scroll member can maintain high reliability over a long period of time.
  • FIG. 1 It is sectional drawing which shows schematic structure of the scroll compressor in this Embodiment. It is a figure which shows the meshing state of a fixed scroll and a turning scroll, Comprising: It is sectional drawing in the surface along a main axis
  • (A) is a fixed scroll
  • (b) is a perspective view of a turning scroll. It is the elements on larger scale of the turning scroll which provided the thinning part. It is the elements on larger scale of the turning scroll which shows the other form of a thinning part. It is the elements on larger scale of the turning scroll which shows the other form of a thinning part. It is the elements on larger scale of the turning scroll which shows the other form of a thinning part. It is the elements on larger scale of the turning scroll which shows the other form of a thinning part. It is a perspective view which shows the conventional turning scroll.
  • the vertical compressor 10 includes a main shaft 12, a turning scroll 20 that rotates together with the main shaft 12, and a fixed scroll 30 that is fixed to the housing 11.
  • a refrigerant (fluid) is introduced into the housing 11 from the refrigerant introduction port P ⁇ b> 1 formed on the side surface of the housing 11, and a compression space formed between the orbiting scroll 20 and the fixed scroll 30.
  • the refrigerant is compressed.
  • the compressed refrigerant is discharged from a refrigerant discharge port P ⁇ b> 2 provided at the upper end of the housing 11.
  • the orbiting scroll 20 is integrally formed with a spiral wrap 22 having a predetermined height on one side surface of a disc-shaped end plate 21.
  • the inner peripheral surface IS and the outer peripheral surface OS of the wrap 22 are formed along an involute curve.
  • the thinned portion 66 described later does not follow the involute curve.
  • the fixed scroll 30 a spiral wrap 32 is formed on one side surface of the end plate 31 that faces the orbiting scroll 20 and meshes with the lap 22 of the orbiting scroll 20.
  • the inner peripheral surface IS and the outer peripheral surface OS of the wrap 32 are also formed along an involute curve.
  • the thinned portion 66 is the same as the wrap 22.
  • the orbiting scroll 20 and the fixed scroll 30 are usually obtained by cutting after an iron alloy or aluminum alloy is cast to obtain a scroll intermediate, thereby obtaining a necessary final shape.
  • Chip seals 28 and 38 made of a resin material or the like are provided (not shown in FIGS. 1 and 3).
  • the orbiting scroll 20 and the fixed scroll 30 combine the wrap 22 and the wrap 32 in the housing 11. Thereby, a compression space 50 is formed between the orbiting scroll 20 and the fixed scroll 30.
  • the refrigerant introduced into the compression space 50 from the outer peripheral end OT of the orbiting scroll 20 and the fixed scroll 30 is sequentially sent from the outer peripheral end OT to the center ST and compressed by the revolution of the orbiting scroll 20 relative to the fixed scroll 30.
  • the refrigerant compressed in the compression space 50 is discharged from a refrigerant discharge port P ⁇ b> 2 formed at the upper end of the housing 11 through a reed valve 40 attached to an upper cover 39 provided so as to cover the fixed scroll 30.
  • Both ends of the main shaft 12 are rotatably supported by the housing 11 via bearings 13 and 14.
  • the main shaft 12 is rotationally driven by a motor 17 including a stator 15 fixed to the inner surface of the housing 11 and a rotor 16 fixed to the outer peripheral surface of the main shaft 12 and facing the stator 15.
  • the main shaft 12 is configured to be rotationally driven by one end of the main shaft 12 projecting to the outside through the housing 11 and connected to one end of the main shaft 12 by a driving source (not shown) such as an engine or a motor provided outside. You can also.
  • a boss 18 is formed so as to protrude from the central axis of the main shaft 12 by a predetermined amount.
  • a recess 25 that accommodates the boss 18 is formed on the side of the main shaft 12 of the orbiting scroll 20.
  • the boss 18 is inserted into the recess 25 via a drive bush (bearing) 24, whereby the orbiting scroll 20 is rotatably held by the boss 18.
  • the orbiting scroll 20 is provided eccentrically by a predetermined dimension with respect to the center of the main shaft 12, and when the main shaft 12 rotates around its axis, the orbiting scroll 20 is eccentric with respect to the center of the main shaft 12. Performs swivel motion (revolution) with the radius as the dimension.
  • the main shaft 12 has a lubricating oil passage 12a for supplying the lubricating oil sucked up from the oil reservoir at the bottom of the housing 11 from the upper end portion of the main shaft 12 to the drive bush 24 between the main shaft 12 and the recess 25 and the like. Is formed.
  • the wrap height of the orbiting scroll 20 and the fixed scroll 30 is gradually reduced from the outer peripheral end side toward the center side. More specifically, it is as follows. As shown in FIGS. 2 and 3, the end plate 21 on the orbiting scroll 20 side has a base end that is one side surface on which the wrap 22 is erected, and the center ST side is the outer peripheral end along the vortex direction of the wrap 22. A step portion 70 (proximal end step portion) formed to be higher than the OT side is provided.
  • the end plate 31 of the fixed scroll 30 has a base end that is one side surface on which the wrap 32 is erected, and the center ST side is the outer peripheral end along the vortex direction of the wrap 32.
  • a step portion 70 (proximal end step portion) formed to be higher than the OT side is provided.
  • the bottom surface (one side surface) of the end plate 21 is formed with a stepped portion 70, so that the bottom bottom surface 21A provided on the outer peripheral end OT side and the bottom bottom surface 21B provided on the center ST side are formed. It is divided into two parts. Further, the bottom surface of the end plate 31 is also formed with a stepped portion 70 in the same manner as the end plate 31 described above, so that a deep bottom surface 31A provided on the outer peripheral end OT side and a bottom provided on the center ST side are provided. It is divided into two parts with a shallow bottom surface 31B. In the orbiting scroll 20 and the fixed scroll 30, spirally continuous grooves are formed by the end plates 21 and 31 and the spiral wraps 22 and 32.
  • Each of the wraps 22 and 32 includes an inner peripheral surface IS and an outer peripheral surface OS, and is erected from the end plates 21 and 31.
  • the bottom surface of the spiral continuous groove is formed by the bottom surfaces 21A, 21B, 31A, 31B.
  • the stepped portion 70 between the bottom surface 21A, 31A on the outer peripheral end OT side and the bottom surface 21B, 31B on the center ST side is formed in a semicircular shape with the interval between the wraps 22, 32 on both sides of the groove as a diameter.
  • the wrap 22 on the orbiting scroll 20 side corresponds to the stepped portion 70 of the fixed scroll 30, the spiral tip end side is divided into two portions, and the step ST on the vortex center ST side is lower than the outer peripheral end OT side. 62 (tip side stepped portion). That is, the wrap 22 is divided into a high wall portion 22H having a high height and a low wall portion 22L having a lower height than the high wall portion 22H with the stepped portion 62 as a boundary. In the stepped portion 62, a rising wall portion 63 that rises perpendicular to the top surface 22t of the low wall portion 22L is formed between the high wall portion 22H and the low wall portion 22L. It forms the end of the wall 22H.
  • the wrap 32 on the fixed scroll 30 side also corresponds to the stepped portion 70 of the orbiting scroll 20 similarly to the wrap 22, the spiral tip side is divided into two parts, and the vortex center ST side is from the outer peripheral end OT side.
  • a low step 62 tip side step
  • the wrap 32 is divided into a high wall portion 32H having a high height and a low wall portion 32L having a lower height than the high wall portion 32H with the stepped portion 62 as a boundary.
  • a rising wall portion 63 that rises perpendicular to the top surface 32t of the low wall portion 32L is formed between the high wall portion 32H and the low wall portion 32L. It forms the end of the wall 32H.
  • the rising wall portion 63 When viewed from above, the rising wall portion 63 has a shape protruding from the high wall portions 22H and 32H into a semicircular shape whose diameter is the thickness dimension of the high wall portions 22H and 32H.
  • the rising wall portion 63 continues to the wraps 22 and 32 at the meshing start position 65.
  • the stepped portion 62 of the lap 22 starts to mesh with the lap 32 (outer peripheral surface) of the fixed scroll 30 from the meshing start position 65.
  • the stepped portion 62 of the lap 32 starts to mesh with the lap 22 (outer peripheral surface) of the orbiting scroll 20 from the meshing start position 65.
  • the thinning portion 66 is provided on one or both of the orbiting scroll 20 and the fixed scroll 30.
  • a specific form of the thinning portion 66 will be described below by taking the orbiting scroll 20 as an example.
  • the orbiting scroll 20 includes a thinning portion 66 on the inner peripheral surface IS of the wrap 22.
  • the thinning portion 66 is formed between the engagement start position 65 of the wrap 22 and a predetermined engagement position toward the outer peripheral end OT.
  • the thinned portion 66 is retracted from the inner peripheral surface IS of the wrap 22 toward the outer peripheral surface OS, so that the thickness is reduced as compared with other portions of the wrap 22.
  • the thinning portion 66 is provided to avoid contact between the wrap 22 and the wrap 32.
  • the engagement start position 65 may be referred to as the front end of the thinning portion 66, and the predetermined position on the outer peripheral end OT side may be referred to as the rear end of the thinning portion 66.
  • the lap 32 of the fixed scroll 30 starts to engage with the lap 22 from the engagement start position 65 in the process of the orbiting scroll 20 revolving orbiting.
  • the wrap 22 and the wrap 32 do not contact in the region where the thinned portion 66 is provided.
  • the thinned portion 66 can be easily formed by, for example, increasing the depth of cut compared to other portions in the process of processing the inner peripheral surface IS of the lap 22 with an end mill.
  • the front end of the thinned portion 66 it is preferable to set the front end of the thinned portion 66 to the center ST side from the engagement start position 65, that is, to the front in the circumferential direction.
  • the thinning portion 66 extends to the rising wall portion 63 in addition to the thinning portion 66 extending to the low wall portion 22L beyond the engagement start position 65, the wrap 22 and the wrap 32 are formed. Can be more reliably avoided.
  • the stress applied to the root 63a can be reduced as the rear end of the thinned portion 66 moves away from the engagement start position 65 in the circumferential direction.
  • the rear end of the thinned portion 66 is set in a range where the turning angle is 20 ° from the engagement start position 65.
  • the thinned portion 66 is provided in the entire region in the height direction from the distal end of the wrap 22 to the base end (bottom surface 21B). It is not limited to. For example, as shown in FIG. 5A, a region where the thickness is not reduced is left from the bottom surface 21B to a predetermined position in the height direction of the wrap 22. Thus, the following effects are exhibited by providing the thinned portion 66 in a specific region from the distal end of the high wall portion 22H of the wrap 22 to a predetermined position in the height direction toward the base end (bottom surface 21B).
  • the wrap 22 (high wall portion 22H) has a region where the thickness is not reduced below the thinned portion 66
  • the wrap 22 of the wrap 22 is compared with the example of FIG. 4 in which the thinned portion 66 is provided in the entire height direction. High strength.
  • region which provides the thickness reduction part 66 the leakage of a refrigerant
  • coolant can be suppressed.
  • the wrap 32 when the wrap 32 reaches the engagement start position 65, the wrap 32 preferentially contacts the wrap 22 with an area where the wall thickness is not reduced, so that the wrap 32 is positioned. Therefore, in the region corresponding to the thinned portion 66, contact between the wrap 22 and the wrap 32 can be avoided more reliably.
  • this invention can also provide the thinning part 66 only above the upper end of the low wall part 22L of the lap
  • FIG. 5 (b) since the thinned portion 66 can be processed in the process of processing the inner peripheral surface IS of the lap 22, it contributes to a reduction in manufacturing cost as compared with FIG.
  • the thinned portion 66 described above has a constant height from the front end (meshing start position 65) to the rear end, but the present invention is not limited to this.
  • the lower edge of the thinned portion 66 may be linearly raised toward the rear end as shown in FIG. 6 (a), or the lower portion of the thinned portion 66 as shown in FIG. 6 (b). The edge may be raised stepwise.
  • the thinned portion 66 is formed up to the upper end of the high wall portion 22H.
  • the thinning portion 66 shown in FIG. 6 can more easily prevent the refrigerant from leaking than the thinning shown in FIG.
  • the thinning amount of thinning portion 66 (circumferential direction, height direction)>
  • the thinning amount can be constant throughout the thinning portion 66, but may be varied.
  • FIG. 7A shows a form in which the thickness reduction is changed from the front end to the rear end.
  • the thinning amount in the vicinity of the engagement start position 65 is maximized, and the thinning amount is gradually reduced toward the front end and the rear end.
  • the amount of thinning can be varied in the height direction of the wrap 22.
  • the amount of thinning is made constant above the low wall portion 22L, but the amount of thinning is gradually reduced downward below the low wall portion 22L.
  • the thinned portion 66 is provided in the stepped portion 62 of the orbiting scroll 20 in the above embodiment.
  • the thinned portion 66 can be provided in the stepped portion 62 of the fixed scroll 30, or the orbiting scroll. It is also possible to provide a thinning portion 66 on both 20 and the fixed scroll 30.
  • the above embodiment demonstrated the example which provides the thinning part 66 in the level
  • the thinning portion 66 may be provided at the stepped portion 70 (base end side stepped portion) between the bottom surface 21A and the bottom surface 21B of the fixed scroll 30. Since the wrap 22 of the orbiting scroll 20 and the wrap 32 of the fixed scroll 30 are in contact with each other at the stepped portion 62 and the stepped portion 70, the thinned portion 66 is provided on one of the stepped portion 62 and the stepped portion 70, so Contact between 22 and wrap 32 can be avoided. Therefore, providing the thinned portion 66 at the stepped portion 62 of the fixed scroll 30 is equivalent to providing the thinned portion 66 at the stepped portion 70 of the orbiting scroll 20. That is, the present invention includes providing the thinned portion 66 in at least one region of the stepped portion 62 and the stepped portion 70 of the orbiting scroll 20, the stepped portion 62 of the fixed scroll 30, and the stepped portion 70.
  • the orbiting scroll 20 and the fixed scroll 30 can be made using an iron alloy or an aluminum alloy, but the orbiting scroll 20 may be made of an aluminum alloy having a small specific gravity and the fixed scroll 30 may be made of an iron alloy having a high strength. In this case, it is preferable to provide the thinned portion 66 on the fixed scroll 30 made of a strong iron alloy. Since the thinning portion 66 reduces the mechanical strength of the wraps 22 and 32, the thinning portion 66 is provided in the fixed scroll 30 without providing the thinning portion 66 in the orbiting scroll 20 made of an aluminum alloy having low mechanical strength. It is. In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention porte sur les machines à fluide du type à volute. Le but de la présente invention consiste à réaliser un élément de volute apte à éviter la concentration de contraintes sur la racine d'une partie épaulée. Une volute rebutante (20) comprend : une plaque d'extrémité (21) ; un recouvrement en spirale (22) disposé verticalement sur une surface latérale de la plaque d'extrémité (21) et qui s'étend du côté du centre vers le côté d'extrémité circonférentielle extérieure ; une partie épaulée du côté d'extrémité (62) située sur un côté d'extrémité du recouvrement (22) et qui est plus basse sur le côté central que sur le côté d'extrémité circonférentielle extérieure ; et une partie épaulée du côté d'extrémité de base (70) située sur une surface latérale du recouvrement (22) et qui est plus haute sur le côté central que sur le côté d'extrémité circonférentielle extérieure. Dans la volute rebutante (20), une partie amincie (66) est formée dans une région de prise prédéterminée à partir d'une position de départ de prise (65) du recouvrement (22) dans la partie épaulée du côté d'extrémité (62) et/ou la partie épaulée du côté d'extrémité de base (70).
PCT/JP2012/004408 2011-08-05 2012-07-06 Élément de volute et machine à fluide du type à volute Ceased WO2013021545A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12822800.4A EP2740938B1 (fr) 2011-08-05 2012-07-06 Élément de volute et machine à fluide du type à volute

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-171467 2011-08-05
JP2011171467A JP5888897B2 (ja) 2011-08-05 2011-08-05 スクロール部材及びスクロール型流体機械

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WO2013021545A1 true WO2013021545A1 (fr) 2013-02-14

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JP (1) JP5888897B2 (fr)
WO (1) WO2013021545A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11927186B2 (en) * 2022-05-04 2024-03-12 Lg Electronics Inc. Scroll compressor

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JP6495611B2 (ja) 2014-10-16 2019-04-03 三菱重工サーマルシステムズ株式会社 圧縮機用スクロールの製造方法、製造装置
JP6599099B2 (ja) * 2014-12-15 2019-10-30 三菱重工サーマルシステムズ株式会社 スクロール流体機械
JP6366833B2 (ja) * 2015-06-10 2018-08-01 三菱電機株式会社 スクロール圧縮機
KR102487906B1 (ko) * 2016-04-26 2023-01-12 엘지전자 주식회사 스크롤 압축기
JP6758969B2 (ja) * 2016-07-15 2020-09-23 三菱重工サーマルシステムズ株式会社 段付きスクロール圧縮機およびその設計方法
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JP1574166S (fr) 2016-08-31 2020-04-06
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JP2013036366A (ja) 2013-02-21
EP2740938A4 (fr) 2015-05-06

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