WO2016043132A1 - スクロール型流体機械 - Google Patents

スクロール型流体機械 Download PDF

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Publication number
WO2016043132A1
WO2016043132A1 PCT/JP2015/075822 JP2015075822W WO2016043132A1 WO 2016043132 A1 WO2016043132 A1 WO 2016043132A1 JP 2015075822 W JP2015075822 W JP 2015075822W WO 2016043132 A1 WO2016043132 A1 WO 2016043132A1
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WO
WIPO (PCT)
Prior art keywords
scroll
wrap
lap
tip seal
center
Prior art date
Application number
PCT/JP2015/075822
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
雄太 田中
宏 本田
定明 梶本
Original Assignee
サンデンホールディングス株式会社
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 サンデンホールディングス株式会社 filed Critical サンデンホールディングス株式会社
Priority to CN201580049598.6A priority Critical patent/CN106715909B/zh
Publication of WO2016043132A1 publication Critical patent/WO2016043132A1/ja

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Classifications

    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C19/00—Sealing arrangements in rotary-piston machines or engines
    • F01C19/08—Axially-movable sealings for working fluids
    • 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

Definitions

  • the present invention relates to a scroll type fluid machine, and more particularly to a scroll type fluid machine that improves the sealing performance in the axial direction of a scroll unit in which a spiral shape of a wrap is formed by an algebraic spiral.
  • a scroll type fluid machine has a fixed scroll and a movable scroll having spiral wraps standing on a bottom plate, and includes a scroll unit that forms a sealed space between the wraps of both scrolls opposed to each other. While preventing the rotation of the movable scroll by the blocking mechanism, the movable scroll is revolved around the axis of the fixed scroll to change the volume of the sealed space to compress or expand the fluid.
  • a tip seal groove is formed in the upper end surface of each lap and the tip seal is arranged.
  • the wall thickness of the wrap is constant, so the spiral shape of the tip seal groove on the top surface of the wrap where the tip seal is placed is the center of the wrap (start of winding) It is possible to arrange a tip seal having a length sufficient to prevent fluid leakage by forming the same spiral shape from the outer periphery to the outer periphery (end of winding).
  • the wrap wall thickness decreases (thinners) from the center of the wrap (start of winding) to the outer periphery (end of winding), so the tip seal is applied to the wrap outer periphery. Therefore, there is a possibility that the sealing performance in the axial direction of the scroll unit is impaired as compared with the case where the spiral shape of the wrap is formed by an involute curve.
  • the present invention has been made paying attention to the above-mentioned problems, and is a scroll type fluid that improves the sealing performance in the axial direction of the scroll unit in which the spiral shape of the wrap is formed by an algebraic spiral while reducing the size and weight of the scroll unit.
  • the purpose is to provide a machine.
  • a spiral wrap is erected on the bottom plate, and a fixed scroll and a movable scroll in which a tip seal is disposed in a tip seal groove formed on the upper end surface of the wrap are opposed to each other so as to engage each other.
  • a scroll unit that forms a sealed space in which the movable scroll, which is prevented from rotating, revolves in contact with the fixed scroll member and changes its volume as it revolves, is provided between the wraps.
  • a scroll type fluid machine having a shape formed by an algebraic spiral whose wrap wall thickness decreases as it goes from the central part of the lap toward the outer peripheral part, in the vicinity of the finishing end point of the outer peripheral part of the wrap outer peripheral part in at least one of the scrolls.
  • the wrap wall thickness is set to a minimum wall thickness at which the tip seal can be arranged.
  • the outer periphery of the wrap in the scroll is finished. Since the lap wall thickness in the vicinity of the processing end point is set to the minimum wall thickness at which the tip seal can be arranged, even when the wrap spiral shape is formed by an algebraic spiral, the tip seal can be reliably arranged up to the outer peripheral portion of the lap. Accordingly, it is possible to improve the axial sealability of the scroll unit in which the wrap is formed of an algebraic spiral while reducing the size and weight of the scroll unit.
  • FIG. 3 is an enlarged view of a portion X surrounded by a broken line in FIG. 2.
  • the scroll type fluid machine according to the present invention can be used as a compressor or an expander.
  • a compressor an example of a compressor will be described.
  • FIG. 1 to 4 show the configuration of the scroll compressor according to the present embodiment.
  • FIG. 1 is a sectional view showing the overall configuration
  • FIG. 2 is a plan view of a fixed scroll viewed from the lap side
  • FIG. 3 is a lap side.
  • FIG. 4 is an explanatory view of the scroll unit.
  • the scroll compressor 1 includes a scroll unit 4 having a fixed scroll 2 and a movable scroll 3 that are opposed to each other in the central axis direction.
  • the fixed scroll 2 has a spiral wrap 2b erected on a bottom plate 2a.
  • the movable scroll 3 is similarly provided with a spiral wrap 3b standing on the bottom plate 3a.
  • the scrolls 2 and 3 are arranged so that the side walls of the wraps 2b and 3b are partially in contact with each other with the circumferential angles of the wraps 2b and 3b being shifted from each other. It is installed. Thereby, the fluid pocket 5 which is a crescent-shaped sealed space is formed between both wraps 2b and 3b.
  • the broken line in FIG. 4 has shown the outer edge part of the baseplate 3a of the movable scroll 3.
  • the movable scroll 3 is revolved around the central axis of the fixed scroll 2 by a drive mechanism and a rotation prevention mechanism 30 described later, and rotation is prevented.
  • the fluid pocket 5 formed between the wraps 2b and 3b is moved from the outer peripheral portion of the wraps 2b and 3b toward the center portion, so that the volume of the fluid pocket 5 changes in the reduction direction. Therefore, the fluid (for example, refrigerant gas) taken into the fluid pocket 5 from the outer peripheral side of the wraps 2b and 3b is compressed.
  • the volume of the fluid pocket 5 changes in the increasing direction by moving the fluid pocket 5 from the center of the wrap 2b, 3b toward the outer periphery, and the wrap 2b, 3b.
  • the fluid taken into the fluid pocket 5 from the central side is expanded.
  • the housing of the scroll compressor 1 includes a center housing 6 that encloses the scroll unit 4, a front housing 7 disposed on the front side, and a rear housing 8 disposed on the rear side.
  • the center housing 6 is formed integrally with the bottom plate 2a of the fixed scroll 2 as a casing (outer shell) of the scroll unit 4.
  • the fixed scroll 2 and the center housing 6 may be separate members, and the fixed scroll 2 may be housed and fixed in the center housing 6.
  • the center housing 6 is closed on the rear side by the bottom plate 2a and opened on the front side.
  • the front housing 7 is fastened to the opening side of the center housing 6 with bolts (not shown).
  • the front housing 7 supports the movable scroll 3 in the thrust direction and houses a drive mechanism for the movable scroll 3.
  • the front housing 7 has a fluid suction chamber 9 connected to a suction port (not shown) formed on the outer wall of the front housing 7.
  • the front housing 7 and the center housing 6 extend in a direction parallel to the central axis of the compressor, and from the suction chamber 9 on the front housing 7 side to the outer peripheral portions of both laps 2b and 3b of the scroll unit 4 on the center housing 6 side.
  • a fluid passage space 10 for guiding the fluid is formed in the vicinity.
  • the rear housing 8 is fastened to the bottom plate 2a side of the fixed scroll 2 in the center housing 6 by bolts (not shown), and the fluid discharge chamber 11 is formed between the rear surface of the bottom plate 2a.
  • a compressed fluid discharge hole 12 is formed at the center of the bottom plate 2 a of the fixed scroll 2, and a one-way valve 13 is attached to the discharge hole 12.
  • the discharge hole 12 is connected to the discharge chamber 11 via a one-way valve 13.
  • the discharge chamber 11 is connected to a discharge port (not shown) formed on the outer wall of the rear housing 8.
  • the fluid is introduced into the suction chamber 9 in the front housing 7 from the suction port, and contacts the laps 2b and 3b from the outer peripheral side of the scroll unit 4 through the fluid passage space 10 of the front housing 7 and the center housing 6. Is taken into the fluid pocket 5 formed by the above, and subjected to compression.
  • the compressed fluid is discharged from the discharge hole 12 formed in the center of the bottom plate 2a of the fixed scroll 2 to the discharge chamber 11 in the rear housing 8, and is led out to the outside through the discharge port.
  • the front housing 7 faces the back surface of the bottom plate 3a of the movable scroll 3 on the inner side of the outer peripheral portion fastened to the opening side of the center housing 6 by bolts (not shown), and applies the thrust force from the movable scroll 3 to the thrust plate.
  • 14 has a thrust receiving portion 15 that is received via 14.
  • the front housing 7 also rotatably supports a drive shaft 20 that forms the core of the drive mechanism of the movable scroll 3 at the center.
  • One end of the drive shaft 20 protrudes outside the front housing 7, and a pulley 22 is attached to the drive shaft 20 via an electromagnetic clutch 21. Accordingly, the drive shaft 20 is rotationally driven by the rotational driving force input from the pulley 22 via the electromagnetic clutch 21.
  • the other end portion side of the drive shaft 20 is connected to the movable scroll 3 via a crank mechanism.
  • the crank mechanism includes a cylindrical boss portion 23 protruding from the back surface of the bottom plate 3a of the movable scroll 3, and an eccentric bush 25 attached to a crank 24 provided at an end of the drive shaft 20 in an eccentric state.
  • the eccentric bush 25 is fitted inside the boss portion 23 via a bearing 26.
  • a balancer weight 27 is attached to the eccentric bush 25 so as to face the centrifugal force during the operation of the movable scroll 3.
  • the rotation prevention mechanism 30 protrudes from the circular hole 31 formed on the back surface of the bottom plate 3 a of the movable scroll 3 (opposite the thrust receiving portion 15 of the front housing 7) and the thrust receiving portion 15 side of the front housing 7.
  • a plurality (for example, a plurality) of rotation preventing portions 33 formed of pins 32 penetrating the plate 14 and engaging with the circular holes 31 are arranged along the circumferential direction in the vicinity of the outer peripheral edge of the back surface of the bottom plate 3a of the movable scroll 3 (for example, 4) are arranged. If there are at least three rotation preventing portions 33, the movable scroll 3 can revolve around the axis of the fixed scroll 2 without rotating.
  • the spiral wrap 2b is integrally provided on the bottom plate 2a, and the substantially U-shaped chip seal groove 2c (shown in FIG. 5) is formed on the upper end surface of the wrap 2b. ) And the chip seal 40 is fitted. Further, a compressed fluid discharge hole 12 is formed in the center of the bottom plate 2a.
  • the spiral shape of the wrap 2b is formed by an algebraic spiral so that the wrap wall thickness A shown in FIG. 5 decreases (thinners) as it goes from the center to the outer periphery of the wrap 2b.
  • the fixed scroll 2 finishes the lap 2b after casting using an end mill or the like, and expands the portion X surrounded by the broken line in FIG. 2 to determine the wrap wall thickness A at the finishing end point shown in FIG. It is formed to minimize wall thickness a s possible.
  • the minimum wall thickness A s possible placement of tip seal 40, to place the tip seal 40 to wrap 2b upper surface of the wrap 2b upper surface end portion shown in FIG. 5 to the tip seal groove 2c
  • Wall thickness B1 and B2 (B1 is the wall thickness from the outer wall of the wrap 2b to the tip seal groove 2c, B2 is the wall thickness from the inner wall of the wrap 2b to the tip seal groove 2c), and the side wall thicknesses B1 and B2 are necessary.
  • the spiral shape of the tip seal groove 2c of the fixed scroll 2 (profile of the tip seal groove 2c) is made closer to the outer wall side than the center portion of the wrap 2b from the center portion of the wrap 2b to the vicinity of the finishing end point of the outer peripheral portion of the wrap 2b. A distance from the outer wall of the wrap 2b to the tip seal groove 2c (wall thickness B1 in FIG.
  • a spiral wrap 3b is integrally erected on the bottom plate 3a, and a substantially U-shaped chip seal groove 3c (see FIG. 5) is formed on the upper end surface of the wrap 3b.
  • the tip seal 41 is fitted.
  • the spiral shape of the wrap 3b is the same as that of the wrap 2b of the fixed scroll 2, and is formed by an algebraic spiral so that the wrap wall thickness decreases (becomes thinner) from the center to the outer periphery of the wrap 3b.
  • the movable scroll 3 is formed by finishing the lap 3b by an end mill or the like after casting so that the wall thickness of the wrap 3b at the finishing end point is at least equal to or greater than the minimum wall thickness at which the tip seal 41 can be disposed.
  • the spiral shape of the tip seal groove 3c of the movable scroll 3 (profile of the tip seal groove 2c) is the same as that of the fixed scroll 2, and the wrap 3b extends from the center of the wrap 3b to the vicinity of the finishing end point of the outer periphery of the wrap 3b. A distance from the outer wall of the wrap 3b to the chip seal groove 3c (wall thickness B1 in FIG.
  • the arrangement form of the tip seal is switched.
  • the spiral shape of the tip seal groove 3c of the movable scroll 3 is formed so that the distance from the inner wall of the wrap 3b to the tip seal groove 2c is constant without switching from the center of the wrap 3b to the end of the tip seal groove 3c. Also good.
  • the lap wall thickness A at the finishing end point of the fixed scroll and the movable scrolls 2 and 3 having the algebraic spiral lap shape is set to the minimum wall thickness A at which the tip seals 40 and 41 can be arranged. Since it is formed so as to be s , the tip seals 40 and 41 can be reliably arranged on the outer peripheral portions of the algebraic spiral wraps 2b and 3b. Therefore, both the fixed and movable scrolls 2 and 3 can be reduced in size and weight, and the scroll unit 4 can be reduced in size and weight, and the sealing performance in the axial direction of the scroll unit 4 can be improved.
  • the tip seal 40 disposed on the upper end surface of the wrap 2b of the fixed scroll 2 is disposed on the outer wall side from the center of the wrap 2b from the center of the wrap 2b (start of winding) to the vicinity of the finishing end of the outer periphery of the wrap 2b (end of winding). Since it is arranged along the outer wall closer to the inner wall side of the wrap 2b, the tip seal 41 is arranged closer to the inner wall side of the wrap 2b in the central portion of the wrap 2b where the inlet portion of the discharge hole 12 has a complicated shape.
  • the winding start of the seal 41 can be further extended to the central portion of the wrap 2b, the sealing performance in the unit axial direction at the central portion of the scroll unit 4 is improved, and the internal leakage of the fluid can be suppressed. Further, after the vicinity of the finishing process end point, the spiral shape of the chip seal groove 2c is switched, and from the vicinity of the finishing process end point to the terminal end part of the chip seal 41, the chip seal 40 along the inner wall is located closer to the inner wall side than the central part of the wrap 2b. Compared with the case where the tip seal 41 is arranged closer to the outer wall side than the central portion of the lap 2b without switching the spiral shape of the tip seal groove 2c even after the finishing processing end point is changed, as shown in FIG.
  • the tip seal 40 disposed on the upper end surface of the wrap 2b of the fixed scroll 2 is placed on the wrap 2b from the center of the wrap 2b (start of winding) to the vicinity of the finishing end of the outer periphery of the wrap 2b (end of winding).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
PCT/JP2015/075822 2014-09-18 2015-09-11 スクロール型流体機械 WO2016043132A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201580049598.6A CN106715909B (zh) 2014-09-18 2015-09-11 涡旋型流体设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-190092 2014-09-18
JP2014190092A JP6470000B2 (ja) 2014-09-18 2014-09-18 スクロール型流体機械

Publications (1)

Publication Number Publication Date
WO2016043132A1 true WO2016043132A1 (ja) 2016-03-24

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Application Number Title Priority Date Filing Date
PCT/JP2015/075822 WO2016043132A1 (ja) 2014-09-18 2015-09-11 スクロール型流体機械

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CN (1) CN106715909B (zh)
WO (1) WO2016043132A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108278204B (zh) * 2018-02-07 2023-12-19 宁波汇峰聚威科技股份有限公司 一种涡旋压缩机的密封装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04279785A (ja) * 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd スクロール型圧縮機
JPH0727065A (ja) * 1993-07-07 1995-01-27 Hitachi Ltd スクロール形流体機械
JPH08151981A (ja) * 1994-09-30 1996-06-11 Toshiba Corp 作動流体を移送する機械
JPH10288172A (ja) * 1997-04-10 1998-10-27 Sanden Corp スクロール型流体機械用スクロール部材
JP2014152748A (ja) * 2013-02-13 2014-08-25 Panasonic Corp スクロール圧縮機

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171983U (ja) * 1984-04-25 1985-11-14 三菱重工業株式会社 スクロ−ル型流体機械
TW330969B (en) * 1994-09-30 1998-05-01 Toshiba Co Ltd Fluid machine
JP4088570B2 (ja) * 2003-05-08 2008-05-21 松下電器産業株式会社 非回転切削工具
JP2015048743A (ja) * 2013-08-30 2015-03-16 株式会社ケーヒン スクロール型圧縮機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04279785A (ja) * 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd スクロール型圧縮機
JPH0727065A (ja) * 1993-07-07 1995-01-27 Hitachi Ltd スクロール形流体機械
JPH08151981A (ja) * 1994-09-30 1996-06-11 Toshiba Corp 作動流体を移送する機械
JPH10288172A (ja) * 1997-04-10 1998-10-27 Sanden Corp スクロール型流体機械用スクロール部材
JP2014152748A (ja) * 2013-02-13 2014-08-25 Panasonic Corp スクロール圧縮機

Also Published As

Publication number Publication date
CN106715909A (zh) 2017-05-24
JP6470000B2 (ja) 2019-02-13
CN106715909B (zh) 2018-12-07
JP2016061230A (ja) 2016-04-25

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