WO2019163322A1 - Machine à fluide à spirale - Google Patents

Machine à fluide à spirale Download PDF

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Publication number
WO2019163322A1
WO2019163322A1 PCT/JP2019/000737 JP2019000737W WO2019163322A1 WO 2019163322 A1 WO2019163322 A1 WO 2019163322A1 JP 2019000737 W JP2019000737 W JP 2019000737W WO 2019163322 A1 WO2019163322 A1 WO 2019163322A1
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WO
WIPO (PCT)
Prior art keywords
wall body
end plate
wall
flat
groove bottom
Prior art date
Application number
PCT/JP2019/000737
Other languages
English (en)
Japanese (ja)
Inventor
創 佐藤
央幸 木全
真史 濱野
隆英 伊藤
Original Assignee
三菱重工サーマルシステムズ株式会社
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 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Priority to CN201980014003.1A priority Critical patent/CN111742142B/zh
Priority to EP19756906.4A priority patent/EP3739213B1/fr
Publication of WO2019163322A1 publication Critical patent/WO2019163322A1/fr

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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
    • F04C18/0246—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/02—Rotary-piston machines or engines 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
    • 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
    • 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
    • F04C18/0253—Details concerning the base

Definitions

  • the present invention relates to a scroll fluid machine.
  • a scroll fluid machine that compresses or expands a fluid by meshing a fixed scroll member provided with a spiral wall on an end plate and a orbiting scroll member and performing a revolving orbiting motion.
  • a so-called stepped scroll compressor as shown in Patent Document 1 is known.
  • This stepped scroll compressor is provided with stepped portions at positions along the spiral direction of the tooth tip surface and the tooth bottom surface of the spiral wall body of the fixed scroll and the orbiting scroll, and the outer periphery of the wall body with each step portion as a boundary.
  • the height on the side is higher than the height on the inner peripheral side.
  • the stepped scroll compressor is compressed not only in the circumferential direction of the wall but also in the height direction (three-dimensional compression), so compared to a general scroll compressor (two-dimensional compression) that does not have a stepped portion.
  • the displacement can be increased and the compressor capacity can be increased.
  • the stepped scroll compressor has a problem of large fluid leakage at the stepped portion.
  • the stress is concentrated due to the stress concentrated at the base of the stepped portion.
  • the inventors are considering providing a continuous inclined part instead of the step part provided in the wall body and the end plate.
  • the inclined connection part is provided between the inclined part and the flat part.
  • the following problems may occur in the inclined connection portion. That is, in the inclined connecting portion, if the inclined portion and the flat portion are connected as they are, the shape changes discontinuously, and the processing becomes difficult, so that burrs and sagging are likely to occur at the tooth tip and the tooth bottom. If burrs or sagging occurs in the tooth tip or the tooth bottom, it will deviate from the desired shape, and will protrude to the opposite tooth bottom side or tooth tip side, which may cause excessive contact between the tooth tip and the tooth bottom. .
  • the inclined connection portion is provided at the groove bottom of the groove. If burrs or sagging occurs in the groove bottom inclined connection portion, the tip seal is caught, and there is a possibility that the movement of the tip seal according to the turning motion is limited and the desired sealing performance cannot be exhibited.
  • This invention is made in view of such a situation, Comprising: An inclined part and a flat part are provided in a wall body and an end plate, and the malfunction which arises in the connection part of an inclined part and a flat part can be avoided.
  • An object is to provide a scroll fluid machine.
  • a scroll fluid machine includes a first scroll member having a spiral first wall provided on a first end plate, and a first scroll member disposed so as to face the first end plate.
  • a scroll fluid machine comprising a second scroll member provided with a spiral second wall on a two-end plate, and the second wall meshing with the first wall and relatively revolving orbiting. The distance between the opposing surfaces of the first end plate and the second end plate facing each other continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body.
  • An inclined portion a wall body flat portion that is provided at the outermost peripheral portion and the innermost peripheral portion of the first wall body and the second wall body, and whose height does not change, the first end plate, and the second end plate And an end plate flat part corresponding to the wall body flat part, the inclined part around the center of the spiral
  • An end plate which is provided over a range of 80 ° or more and which connects the inclined portion and the end plate flat portion and / or the tooth tip of the inclined wall portion connecting the inclined portion and the flat wall portion.
  • An inclination relaxation shape is provided on the tooth bottom of the inclined connection part to relax and connect the inclination from the flat part to the inclined part.
  • the inclined portion in which the distance between the opposing surfaces of the first end plate and the second end plate continuously decreases from the outer peripheral side to the inner peripheral side of the wall body is provided, the fluid sucked from the outer peripheral side is As it goes to the inner peripheral side, it is compressed not only by the reduction of the compression chamber according to the spiral shape of the wall body, but also by the reduction of the distance between the opposing surfaces between the end plates.
  • the wall slope connecting portion that connects the slope portion and the wall flat portion and / or the end plate slope connection portion that connects the slope portion and the end plate flat portion is an attempt to connect the flat portion and the slope portion as they are. Since the shape changes discontinuously and processing becomes difficult, burrs and sagging are likely to occur at the tip and bottom of the inclined connection portion.
  • an inclination relaxation shape for relaxing and connecting the inclination from the flat portion to the inclined portion is provided at the tooth tip of the wall inclined connection portion and / or the tooth bottom of the end plate inclined connection portion.
  • the scroll fluid machine includes a first scroll member having a spiral first wall provided on a first end plate, and a first scroll member disposed so as to face the first end plate.
  • a scroll fluid machine comprising a second scroll member provided with a spiral second wall on a two-end plate, and the second wall meshing with the first wall and relatively revolving orbiting. The distance between the opposing surfaces of the first end plate and the second end plate facing each other continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body.
  • An inclined portion a wall body flat portion that is provided at the outermost peripheral portion and the innermost peripheral portion of the first wall body and the second wall body, and whose height does not change, the first end plate, and the second end plate And an end plate flat portion corresponding to the wall body flat portion, and the inclined portion is 1 around the center of the spiral.
  • An end plate which is provided over a range of 0 ° or more and connects the inclined portion and the end plate flat portion and / or the tooth tip of the inclined wall connection portion connecting the inclined portion and the flat wall portion.
  • the tooth bottom of the inclined connecting portion is retracted in a direction of retreating from the tooth bottom or the tooth tip facing away from the extrapolated line of the flat portion and the extrapolated line of the inclined portion when viewed in a longitudinal section.
  • a retracting portion is provided that is located in the direction of retracting from the position. That is, the tip clearance, which is a gap between the tooth tip and the tooth bottom, is increased by providing the retracting portion. Thereby, a possibility that a tooth tip and a tooth bottom may contact in an inclined connection part can be reduced.
  • “Vertical cross-sectional view” means a cross-sectional view when cut along a cross-section along the central axis direction of the scroll member, and specifically means a cross-sectional view along the height direction of the wall body.
  • the scroll fluid machine includes a first scroll member having a spiral first wall provided on a first end plate, and a first scroll member disposed so as to face the first end plate.
  • a second scroll body is provided on the two end plates, and the second wall member meshes with the first wall body to relatively revolve, and the first wall body,
  • a scroll fluid machine provided in a groove formed in a tooth tip of the second wall body and having a tip seal that seals fluid in contact with an opposing tooth bottom, the first end plate facing the scroll wall machine,
  • the distance between the opposing surfaces of the second end plate continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body, the first wall body and the first wall body
  • a wall flat portion provided at the outermost peripheral portion and the innermost peripheral portion of the second wall body, the height of which does not change;
  • a wall inclined connecting portion in which a body flat portion and the inclined portion are connected, an end plate flat portion corresponding to the wall flat portion provided on the first end plate and the second end plate,
  • the groove bottom inclined connecting portion tries to connect the groove bottom flat portion and the groove bottom inclined portion as they are, the shape will change discontinuously and it will be difficult to process, so burrs and sagging will easily occur. If burrs or sagging occur in the groove bottom, the tip seal is caught and movement according to the turning motion is restricted, and there is a possibility that the sealing performance cannot be effectively exhibited. Accordingly, the groove bottom inclined connecting portion is provided with an inclination relaxing shape that relaxes and connects the inclination from the groove bottom flat portion to the groove bottom inclined portion. As a result, a smooth shape can be adopted at the groove bottom inclined connecting portion, and the desired seal performance can be obtained by suppressing the tip seal from being caught and allowing the tip seal to move according to the turning motion. it can. Examples of the “gradient relaxation shape” include a chamfered shape.
  • the scroll fluid machine includes a first scroll member having a spiral first wall provided on a first end plate, and a first scroll member disposed so as to face the first end plate.
  • a second scroll body is provided on the two end plates, and the second wall member meshes with the first wall body to relatively revolve, and the first wall body,
  • a scroll fluid machine provided in a groove formed in a tooth tip of the second wall body and having a tip seal that seals fluid in contact with an opposing tooth bottom, the first end plate facing the scroll wall machine,
  • the distance between the opposing surfaces of the second end plate continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body, the first wall body and the first wall body
  • a wall flat portion provided at the outermost peripheral portion and the innermost peripheral portion of the second wall body, the height of which does not change;
  • a wall inclined connecting portion in which a body flat portion and the inclined portion are connected, an end plate flat portion corresponding to the wall flat portion provided on the first end plate and the second end plate,
  • the groove bottom inclined connection portion is provided with a deep groove portion positioned in a direction in which the groove becomes deeper than the extrapolation line of the groove bottom inclined portion when viewed in a longitudinal section.
  • the scroll fluid machine includes a first scroll member having a spiral first wall provided on a first end plate, and a first scroll member disposed so as to face the first end plate.
  • a second scroll body is provided on the two end plates, and the second wall member meshes with the first wall body to relatively revolve, and the first wall body,
  • a scroll fluid machine provided in a groove formed in a tooth tip of the second wall body and having a tip seal that seals fluid in contact with an opposing tooth bottom, the first end plate facing the scroll wall machine,
  • the distance between the opposing surfaces of the second end plate continuously decreases from the outer peripheral side to the inner peripheral side of the first wall body and the second wall body, the first wall body and the first wall body
  • a wall flat portion provided at the outermost peripheral portion and the innermost peripheral portion of the second wall body, the height of which does not change;
  • a wall inclined connecting portion in which a body flat portion and the inclined portion are connected, an end plate flat portion corresponding to the wall flat portion provided on the first end plate and the second end plate,
  • the thickness of the chip seal at the position corresponding to the groove bottom inclined connection portion was made thinner than other regions. Thereby, it is possible to obtain a desired sealing performance by suppressing the tip seal from being caught at the groove bottom inclined connecting portion during the turning motion and allowing the tip seal to move according to the turning motion.
  • FIG. 7 is a side view showing a state where the tip seal gap of the portion shown in FIG. 6 is shown and the tip seal gap is relatively small.
  • FIG. 7 is a side view showing a state where the tip seal gap is shown in FIG. 6 and the tip seal gap is relatively large. It is the perspective view which showed the wall body inclination connection part periphery. It is a top view of the fixed scroll which showed the position around the wall body inclination connection part shown in FIG. It is the longitudinal cross-sectional view which showed the inclination connection part periphery shown in FIG. It is the longitudinal cross-sectional view corresponding to FIG. 10 and showing the inclination connection part periphery of a comparative example. It is the longitudinal cross-sectional view which concerns on 2nd Embodiment of this invention and showed the inclination connection part periphery.
  • FIG. 1 shows a fixed scroll (first scroll member) 3 and a turning scroll (second scroll member) 5 of a scroll compressor (scroll fluid machine) 1.
  • the scroll compressor 1 is used as a compressor that compresses a gas refrigerant (fluid) that performs a refrigeration cycle such as an air conditioner.
  • the fixed scroll 3 and the orbiting scroll 5 are made of a metal compression mechanism made of aluminum alloy or iron and are housed in a housing (not shown).
  • the fixed scroll 3 and the orbiting scroll 5 suck the fluid guided into the housing from the outer peripheral side, and discharge the compressed fluid from the central discharge port 3c of the fixed scroll 3 to the outside.
  • the fixed scroll 3 is fixed to the housing, and as shown in FIG. 1A, the fixed scroll 3 is erected on a substantially disc-shaped end plate (first end plate) 3a and one side surface of the end plate 3a. And a spiral wall body (first wall body) 3b.
  • the orbiting scroll 5 includes a substantially disc-shaped end plate (second end plate) 5a and a spiral wall body (second wall body) 5b erected on one side surface of the end plate 5a. .
  • the spiral shape of each wall 3b, 5b is defined using, for example, an involute curve or an Archimedean curve.
  • the fixed scroll 3 and the orbiting scroll 5 are meshed with their centers separated by an orbiting radius ⁇ , with the phases of the wall bodies 3b and 5b shifted by 180 °, and between the tooth tips and the tooth bottoms of the wall bodies 3b and 5b of both scrolls. It is assembled so as to have a slight clearance in the height direction (chip clearance).
  • a plurality of pairs of compression chambers formed between the scrolls 3 and 5 and surrounded by the end plates 3a and 5a and the walls 3b and 5b are formed symmetrically with respect to the scroll center.
  • the orbiting scroll 5 revolves around the fixed scroll 3 by a rotation prevention mechanism such as an Oldham ring (not shown).
  • an inclined portion in which the distance L between the facing surfaces 3a and 5a facing each other continuously decreases from the outer peripheral side to the inner peripheral side of the spiral wall bodies 3b and 5b. It has been.
  • the wall 5b of the orbiting scroll 5 is provided with a wall inclined portion 5b1 whose height continuously decreases from the outer peripheral side toward the inner peripheral side.
  • An end plate inclined portion 3a1 (see FIG. 1A) that is inclined according to the inclination of the wall body inclined portion 5b1 is provided on the tooth bottom surface of the fixed scroll 3 where the tooth tips of the wall body inclined portion 5b1 face each other.
  • These wall body inclination part 5b1 and end plate inclination part 3a1 comprise the continuous inclination part.
  • the wall body 3b of the fixed scroll 3 is also provided with a wall body inclined portion 3b1 whose height is continuously inclined from the outer peripheral side toward the inner peripheral side, and faces the tooth tip of the wall body inclined portion 3b1.
  • An end plate inclined portion 5 a 1 is provided on the end plate 5 a of the orbiting scroll 5.
  • the meaning of “continuous in the inclined portion” in the present embodiment is not limited to the smoothly connected inclination, and small steps that are inevitably generated at the time of processing are connected in a staircase shape. If the part as a whole is included, it is continuously inclined. However, large steps such as so-called stepped scrolls are not included.
  • the wall body inclined portions 3b1 and 5b1 and / or the end plate inclined portions 3a1 and 5a1 are coated.
  • the coating include manganese phosphate treatment and nickel phosphorus plating.
  • wall body flat portions 5b2 and 5b3 having a constant height are provided on the innermost circumferential side and the outermost circumferential side of the wall body 5b of the orbiting scroll 5, respectively. .
  • These wall flat portions 5b2 and 5b3 are provided over a region of 180 ° around the center O2 (see FIG. 1A) of the orbiting scroll 5.
  • Wall body inclined connection portions 5b4 and 5b5 serving as bent portions are respectively provided at positions where the wall body flat portions 5b2 and 5b3 and the wall body inclined portion 5b1 are connected.
  • the bottom of the end plate 5a of the orbiting scroll 5 is provided with flat end plates 5a2 and 5a3 having a constant height.
  • end plate flat portions 5 a 2 and 5 a 3 are also provided over a 180 ° region around the center of the orbiting scroll 5.
  • end plate inclined connecting portions 5a4 and 5a5 serving as bent portions are provided, respectively.
  • the fixed scroll 3 also has the end plate flat portions 3a2 and 3a3, the wall body flat portions 3b2 and 3b3, and the end plate inclined connection portions 3a4 and 3a5 in the same manner as the orbiting scroll 5.
  • wall body inclination connection part 3b4, 3b5 is provided.
  • FIG. 5 shows wall bodies 3b and 5b displayed in a spiral direction.
  • the innermost wall flat portions 3b2 and 5b2 are provided over a distance D2
  • the outermost wall flat portions 3b3 and 5b3 are provided over a distance D3.
  • the distance D2 and the distance D3 have a length corresponding to a region 180 ° (180 ° or more and 360 ° or less, preferably 210 ° or less) around the centers O1 and O2 of the scrolls 3 and 5, respectively.
  • Wall body inclined portions 3b1 and 5b1 are provided over the distance D1 between the innermost wall flat portions 3b2 and 5b2 and the outermost wall flat portions 3b3 and 5b3.
  • the inclination ⁇ in the inclined portion is constant with respect to the circumferential direction in which the spiral wall bodies 3b and 5b extend.
  • the distance D1 is longer than the distance D2 and longer than the distance D3.
  • the specifications of the scrolls 3 and 5 are as follows.
  • Angle range of inclined portion (angle range corresponding to distance D1) [°]: 180 or more and 1080 or less, preferably 360 or more and 720 or less (6)
  • FIG. 6 shows an enlarged view of the region indicated by the symbol Z in FIG. 1B.
  • a tip seal 7 is provided on the tooth tip of the wall 3 b of the fixed scroll 3.
  • the tip seal 7 is made of resin and seals the fluid by contacting the tooth bottom of the end plate 5a of the orbiting scroll 5 facing the tip seal 7.
  • the tip seal 7 is accommodated in a tip seal groove 3d formed in the tooth tip of the wall 3b over the circumferential direction. The compressed fluid enters the tip seal groove 3d, and the tip seal 7 is pressed from the back and pushed out toward the bottom of the tooth to be brought into contact with the opposing tooth bottom.
  • a tip seal is similarly provided on the tooth tip of the wall 5b of the orbiting scroll 5.
  • the height Hc of the tip seal 7 in the height direction of the wall 3b is constant in the circumferential direction.
  • the tip clearance change amount ⁇ h [mm] is, for example, 0.05 to 1.0, preferably 0.1 to 0.6.
  • FIG. 7A shows that the tip clearance T is small
  • FIG. 7B shows that the tip clearance T is large. Even if the tip clearance T changes due to the swiveling motion, the tip seal 7 is pressed against the tooth bottom side of the end plate 5a by the compressed fluid from the back surface, so that it can be followed and sealed.
  • FIG. 8 is a perspective view around the wall inclined connecting portion.
  • This wall body inclination connection part has shown the wall body inclination connection part 3b4 of the inner peripheral side of the fixed scroll 3, as shown by the code
  • the left side is the inner peripheral side of the wall body 3b
  • the right side is the outer peripheral side of the wall body 3b. Therefore, the inner peripheral side (left side in the figure) of the wall inclined connection part 3b4 is the wall flat part 3b2, and the outer peripheral side (right side in the figure) of the wall inclined connection part 3b4 is the wall inclined part 3b1.
  • the tip seal 7 is inserted into the tip seal groove 3d formed in the tooth tip of the wall 3b.
  • a state in which the compressed fluid enters the back surface of the tip seal 7 and protrudes to the opposite tooth bottom side (upper side in the figure) is shown.
  • FIG. 10 shows a longitudinal section around the wall inclined connecting portion 3b4 shown in FIG.
  • the lower solid line indicates the tooth tip of the wall 3 b of the fixed scroll 3
  • the upper solid line indicates the tooth bottom of the end plate 5 a of the orbiting scroll 5. That is, the figure shows a state where the tooth tip and the tooth bottom face each other.
  • the left side is the outer peripheral side of the scrolls 3 and 5
  • the right side is the inner peripheral side of the scrolls 3 and 5.
  • the wall body inclined connection portion 3b4 between the wall body flat portion 3b2 and the wall body inclined portion 3b1 of the fixed scroll 3 is provided with an R chamfered shape.
  • This R chamfered shape is a slope relaxation shape that relaxes and connects the slope from the wall flat portion 3b2 to the wall slope portion 3b1.
  • the R-chamfered surface is positioned above the extrapolation line OL1 of the wall flat portion 3b2 and the extrapolation line OL2 of the wall inclined portion 3b1 in the height direction of the wall body 3b.
  • the end plate inclined connecting portion 5a4 between the end plate flat portion 5a2 and the end plate inclined portion 5a1 of the orbiting scroll 5 is provided with an R chamfered shape.
  • This R chamfered shape is an inclined relaxation shape that relaxes and connects the inclination from the end plate flat portion 5a2 to the end plate inclined portion 5a1.
  • the R-chamfered surface has a direction in which the thickness of the end plate 5a is smaller than the extrapolation line OL3 of the end plate flat portion 5a2 and the extrapolation line OL4 of the end plate inclined portion 5a1 (digging the end plate 5a).
  • the same R chamfering shape is provided also in the inclination connection part 3a4, 5b4 of the other inner peripheral side.
  • the groove bottom 10 (see FIG. 8) of the tip seal groove 3d is also provided with an R chamfered shape similar to the tooth tip of the wall 3b with respect to the groove bottom inclined connection corresponding to the wall inclined connection 3b4. It has been.
  • the scroll compressor 1 described above operates as follows.
  • the orbiting scroll 5 performs a revolving orbiting motion around the fixed scroll 3 by a driving source such as an electric motor (not shown).
  • a driving source such as an electric motor (not shown).
  • the fluid is sucked from the outer peripheral side of the scrolls 3 and 5, and the fluid is taken into the compression chambers surrounded by the walls 3b and 5b and the end plates 3a and 5a.
  • the fluid in the compression chamber is sequentially compressed as it moves from the outer peripheral side to the inner peripheral side, and finally the compressed fluid is discharged from the discharge port 3 c formed in the fixed scroll 3.
  • the inclined portions formed by the end plate inclined portions 3a1 and 5a1 and the wall body inclined portions 3b1 and 5b1 are also compressed in the height direction of the wall bodies 3b and 5b, and three-dimensional compression is performed. Is called.
  • FIG. 10 shows a shape cut by an end mill without adopting an R chamfer shape.
  • FIG. 11 shows a shape cut by an end mill without adopting an R chamfer shape.
  • the extrapolation line OL1 of the wall body flat part 3b2 and the extrapolation line OL2 of the wall body inclination part 3b1 are connected as they are.
  • a sag B1 is generated in the wall body inclined connection portion 3b4, and a burr B2 is generated in the end plate inclined connection portion 5a4. That is, if the wall flat portion 3b2 and the wall inclined portion 3b1 are connected as they are, the wall inclined connecting portion 3b4 becomes a portion where the inclination changes abruptly, that is, a portion where the shape changes discontinuously. In this way, since the portion where the shape changes discontinuously is difficult to be automatically machined by the NC machine tool, a sagging B1 protruding to the tooth bottom side of the orbiting scroll 5 occurs as shown in FIG.
  • an R chamfered shape is provided at the tooth tips of the wall inclined connection portions 3b4, 3b5, 5b4, 5b5 and the tooth bottoms of the end plate inclined connection portions 3a4, 3a5, 5a4, 5a5. This facilitates processing by performing a smooth connection process at the inclined connection portion, suppresses the generation of burrs B2 and sagging B1, and avoids excessive contact between the tooth tip and the tooth bottom. it can.
  • the groove bottom inclined connecting portion is provided with an R chamfered shape in the same manner as the tooth tip, and is provided with an inclined relaxation shape.
  • a C chamfering shape instead of the R chamfering shape used as an inclination relaxation shape.
  • it may have a shape in which the inclination is changed stepwise so as to alleviate the discontinuous inclination.
  • the inclination relaxation shape may be provided only on the inner peripheral side where the fluid pressure in the compression chamber is high, and may not be provided on the outer peripheral side where the fluid pressure in the compression chamber is relatively low.
  • the wall inclined connection portion 3b4 has teeth on the end plate 5a that are opposed to each other than the extrapolation line OL1 of the wall flat portion 3b2 and the extrapolation line OL2 of the wall inclined portion 3b1.
  • a retracting portion is provided that is located in the direction of retracting from the bottom (downward in the figure). This evacuation part is dug in the root direction of the wall 3b, and has a shape that protrudes downward.
  • the end plate inclined connecting portion 5a4 has an R chamfered shape as in the first embodiment. Also, with respect to the other wall body inclined connection portions 3b5, 5b4, and 5b5, a retracting portion is provided that is positioned in a direction of retracting from the opposing tooth bottom.
  • the retracting portion is provided in the wall inclined connection portion 3b4, the tip clearance which is a gap between the tooth tip and the tooth bottom can be increased. Thereby, a possibility that a tooth tip and a tooth bottom may contact in an inclined connection part can be reduced.
  • the end plate inclined connection portion 5a4 has an R-chamfered shape, but a retreating portion that is further dug in the thickness direction of the end plate 5a to be convex upward in FIG. 12 may be provided. .
  • the retracting portion provided in the opposing wall body inclined connection portion 3b4 may be omitted. Further, the retracting portion may be provided only on the inner peripheral side where the fluid pressure in the compression chamber becomes high, and may not be provided on the outer peripheral side where the fluid pressure in the compression chamber is relatively low.
  • the groove bottom 10 of the chip seal groove 3d has a groove bottom inclined portion 10a corresponding to the inclined portion 3b1 of the wall body 3b and a groove bottom flat portion 10b corresponding to the wall body flat portion 3b2.
  • the groove bottom inclination connection part 10c corresponding to the wall body inclination connection part 3b4 is formed.
  • the groove bottom inclined connecting portion 10c is provided with a deep groove portion 10d located in a direction in which the groove is deeper, that is, a direction in which the groove is dug than the extrapolation line OL5 of the groove bottom inclined portion 10a.
  • the deep groove portion 10d has a smooth shape combining curved surfaces.
  • the deep groove portion 10d is also provided in the groove bottom inclined connection portion 10c corresponding to the other wall body inclined connection portions 3b5, 5b4, and 5b5.
  • the tip seal 7 can enter and leave the deep groove portion 10d during the turning motion.
  • the shape in which the chip seal 7 enters the deep groove portion 10d is indicated by a two-dot chain line.
  • the deep groove portion 10d may be provided only on the inner peripheral side where the fluid pressure in the compression chamber is high, and may not be provided on the outer peripheral side where the fluid pressure in the compression chamber is relatively low.
  • the groove bottom 10 of the chip seal groove 3d includes a groove bottom inclined portion 10a corresponding to the inclined portion 3b1 of the wall body 3b, and a groove bottom flat portion 10b corresponding to the wall body flat portion 3b2. And the groove bottom inclination connection part 10c corresponding to the wall body inclination connection part 3b4 is formed.
  • the tip seal 7 has a thickness t1 at a position corresponding to the groove bottom inclined connecting portion 10c thinner than other regions.
  • the shape in which the chip seal 7 is thinned at a position corresponding to the groove bottom inclined connecting portion 10c is also provided in the groove bottom inclined connecting portion 10c corresponding to the other wall inclined connecting portions 3b5, 5b4, and 5b5.
  • the chip seal 7 moves to the groove bottom inclined connecting portion 10c side. (See the two-dot chain line in FIG. 14). Thereby, it is possible to obtain desired sealing performance by suppressing the tip seal 7 from being caught by the groove bottom inclined connection portion 10c during the turning motion and allowing the tip seal 7 to move according to the turning motion.
  • the shape that makes the tip seal 7 thin may be provided only on the inner peripheral side where the fluid pressure in the compression chamber becomes high, and not provided on the outer peripheral side where the fluid pressure in the compression chamber is relatively low.
  • the end plate inclined portions 3a1 and 5a1 and the wall body inclined portions 3b1 and 5b1 are provided on both scrolls 3 and 5, but may be provided on either one of them.
  • the other wall body for example, the orbiting scroll 5
  • the other end plate 3a is provided with the end plate inclined portion 3a1
  • the other The wall body and the one end plate 5a may be flat.
  • the shape combined with the conventional stepped shape that is, the end plate 3a of the fixed scroll 3 is provided with the end plate inclined portion 3a1, while the end plate 5a of the orbiting scroll 5 has a step portion. You may combine with the provided shape.
  • the scroll compressor has been described, but the present invention can also be applied to a scroll expander used as an expander.

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

Abstract

La présente invention concerne une machine à fluide à spirale qui comprend une section inclinée (3b1) de paroi qui diminue en continu, et une section plate (3b2) de paroi disposée sur la partie périphérique la plus à l'intérieur de la paroi (3b) et qui ne varie pas en hauteur. Au niveau du sommet de dent d'une section de liaison (3b4) inclinée de paroi qui relie la section inclinée (3b1) de paroi et la section plate (3b2) de paroi, est formée une forme chanfreinée en R qui permet de modérer et de relier le plan incliné qui s'étend de la section plate (3b2) de paroi à la section inclinée (3b1) de paroi.
PCT/JP2019/000737 2018-02-21 2019-01-11 Machine à fluide à spirale WO2019163322A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980014003.1A CN111742142B (zh) 2018-02-21 2019-01-11 涡旋流体机械
EP19756906.4A EP3739213B1 (fr) 2018-02-21 2019-01-11 Machine à fluide à spirale

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018028960A JP6612376B2 (ja) 2018-02-21 2018-02-21 スクロール流体機械
JP2018-028960 2018-02-21

Publications (1)

Publication Number Publication Date
WO2019163322A1 true WO2019163322A1 (fr) 2019-08-29

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Application Number Title Priority Date Filing Date
PCT/JP2019/000737 WO2019163322A1 (fr) 2018-02-21 2019-01-11 Machine à fluide à spirale

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EP (1) EP3739213B1 (fr)
JP (1) JP6612376B2 (fr)
CN (1) CN111742142B (fr)
WO (1) WO2019163322A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6017956B2 (ja) * 1981-08-18 1985-05-08 サンデン株式会社 スクロ−ル型圧縮機
JP2010196663A (ja) * 2009-02-26 2010-09-09 Mitsubishi Heavy Ind Ltd 圧縮機
CN204003446U (zh) * 2014-06-04 2014-12-10 恒升精密科技股份有限公司 压缩机涡卷
JP2015055173A (ja) 2013-09-11 2015-03-23 三菱重工業株式会社 スクロール圧縮機
JP2018031347A (ja) * 2016-08-26 2018-03-01 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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3046486B2 (ja) * 1993-12-28 2000-05-29 株式会社日立製作所 スクロール式流体機械
JP5851851B2 (ja) * 2012-01-13 2016-02-03 三菱重工業株式会社 スクロール圧縮機
JP6328706B2 (ja) * 2016-08-19 2018-05-23 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およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6017956B2 (ja) * 1981-08-18 1985-05-08 サンデン株式会社 スクロ−ル型圧縮機
JP2010196663A (ja) * 2009-02-26 2010-09-09 Mitsubishi Heavy Ind Ltd 圧縮機
JP2015055173A (ja) 2013-09-11 2015-03-23 三菱重工業株式会社 スクロール圧縮機
CN204003446U (zh) * 2014-06-04 2014-12-10 恒升精密科技股份有限公司 压缩机涡卷
JP2018031347A (ja) * 2016-08-26 2018-03-01 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

Also Published As

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JP2019143551A (ja) 2019-08-29
EP3739213B1 (fr) 2023-09-20
EP3739213A4 (fr) 2021-07-28
JP6612376B2 (ja) 2019-11-27
CN111742142A (zh) 2020-10-02
EP3739213A1 (fr) 2020-11-18
CN111742142B (zh) 2022-06-28
EP3739213C0 (fr) 2023-09-20

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