WO2016043132A1 - Scroll-type fluid machine - Google Patents

Scroll-type fluid machine 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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WIPO (PCT)
Prior art keywords
scroll
wrap
lap
tip seal
center
Prior art date
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PCT/JP2015/075822
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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
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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/en
Publication of WO2016043132A1 publication Critical patent/WO2016043132A1/en

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    • 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)

Abstract

[Problem] To provide a scroll-type fluid machine having improved axial sealing in a scroll unit in which the spiral shape of a lap is formed as an algebraic spiral. [Solution] A scroll-type fluid machine 1 in which the spiral shapes of laps 2b, 3b of fixed and movable scrolls 2, 3 are formed as algebraic spirals, wherein the lap wall thickness A near the end points of finishing processing of the lap outer peripheries in the fixed scroll 2 and the movable scroll 3 is equal to the minimum wall thickness As (As = 2 × B1s (or B2s) + c) with which it is possible to arrange tip seals 40, 41. B1s is the minimum wall thickness from the lap outer wall to a tip seal groove, B2s (= B1s) is the minimum wall thickness from the lap inner wall to the tip seal groove, and c (constant) is the tip seal width.

Description

スクロール型流体機械Scroll type fluid machinery
　本発明は、スクロール型流体機械に関し、詳しくは、ラップの渦巻形状を代数螺旋で形成したスクロールユニットの軸方向におけるシール性を向上させたスクロール型流体機械に関する。 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.
　スクロール型流体機械は、底板に渦巻状のラップが立設された固定スクロールと可動スクロールを有し、互いに対向して噛み合わせた両スクロールのラップ間に密閉空間を形成するスクロールユニットを備え、自転阻止機構により可動スクロールの自転を阻止しつつ、可動スクロールを固定スクロールの軸心周りに公転旋回運動させて密閉空間の容積を変化させて流体を圧縮又は膨張させる。 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.
　このようなスクロール型流体機械として、例えば特許文献１に記載されているものがある。このスクロール型流体機械は、可動スクロールと固定スクロールの各ラップの渦巻形状を代数螺旋で形成されている。ラップの渦巻形状を代数螺旋とすると、ラップの中央部から外周部に向かうに従ってラップの壁厚を徐々に減少させる（薄くさせる）ことができるため、スクロールユニットの小型軽量化を図ることができる。 As such a scroll type fluid machine, there is one described in Patent Document 1, for example. In this scroll type fluid machine, the spiral shape of each lap of the movable scroll and the fixed scroll is formed by an algebraic spiral. When the spiral shape of the wrap is an algebraic spiral, the wall thickness of the wrap can be gradually reduced (thinned) from the center to the outer periphery of the wrap, so that the scroll unit can be reduced in size and weight.
特許第３２９１８４４号公報Japanese Patent No. 3291844
　ところで、スクロールユニットは、ユニット軸方向における流体の漏れを防止するため、互いのラップの上端面にチップシール溝を形成してチップシールを配置している。ラップの渦巻形状を通常のインボリュート曲線で形成した場合は、ラップの壁厚が一定となるので、チップシールを配置するラップ上端面のチップシール溝の螺旋形状を、ラップの中央部（巻き始め）から外周部（巻き終わり）まで同じ螺旋形状に形成して、流体の漏れを防止するのに十分な長さのチップシールを配置することが可能である。しかしながら、ラップの渦巻形状を代数螺旋で形成した場合、ラップの中央部（巻き始め）から外周部（巻き終わり）に向かうに従ってラップ壁厚が減少する（薄くなる）ので、ラップ外周部までチップシールを配置できず、ラップの渦巻形状をインボリュート曲線で形成した場合と比較してスクロールユニットの軸方向のシール性が損なわれる虞れがある。 By the way, in the scroll unit, in order to prevent fluid leakage in the unit axial direction, a tip seal groove is formed in the upper end surface of each lap and the tip seal is arranged. When the spiral shape of the wrap is formed with a normal involute curve, 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). However, when the spiral shape of the wrap is formed by an algebraic spiral, 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.
　本発明は上記問題点に着目してなされたもので、スクロールユニットの小型軽量化を図りつつ、ラップの渦巻形状を代数螺旋で形成したスクロールユニットの軸方向のシール性を向上させたスクロール型流体機械を提供することを目的とする。 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.
　このため、本発明は、底板に渦巻状のラップが立設され、ラップの上端面に形成したチップシール溝にチップシールを配置した固定スクロール及び可動スクロールを、互いに対向させて互いのラップを噛み合わせ、自転が阻止された前記可動スクロールが前記固定スクロール材に接しつつ公転し、互いのラップ間に公転に伴って容積変化する密閉空間を形成するスクロールユニットを備え、前記両スクロールのラップの渦巻形状を、ラップの中央部から外周部へ向かうに従ってラップ壁厚が減少する代数螺旋で形成したスクロール型流体機械であって、前記両スクロールの少なくとも一方のスクロールにおけるラップ外周部の仕上げ加工終点近傍のラップ壁厚を、前記チップシールの配置が可能な最小壁厚としたことを特徴とする。 Therefore, in the present invention, 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. In addition, 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.
　本発明のスクロール型流体機械によれば、スクロールのラップ渦巻形状を、ラップの中央部から外周部へ向かうに従ってラップ壁厚が減少する代数螺旋で形成したスクロールユニットにおいて、スクロールにおけるラップ外周部の仕上げ加工終点近傍のラップ壁厚を、チップシールの配置が可能な最小壁厚としたので、ラップ渦巻形状を代数螺旋で形成した場合でも、ラップの外周部までチップシールを確実に配置できる。従って、スクロールユニットを小型軽量化しつつラップを代数螺旋で形成したスクロールユニットの軸方向のシール性を向上できる。 According to the scroll type fluid machine of the present invention, in the scroll unit in which the wrap spiral shape of the scroll is formed by an algebraic spiral whose wrap wall thickness decreases from the center to the outer periphery of the wrap, 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.
本実施形態のスクロール型圧縮機の全体構成を示す断面図である。It is sectional drawing which shows the whole structure of the scroll compressor of this embodiment. ラップ側から見た固定スクロールの平面図である。It is a top view of the fixed scroll seen from the lap side. ラップ側から見た可動スクロールの平面図である。It is a top view of the movable scroll seen from the lap side. スクロールユニットの説明図である。It is explanatory drawing of a scroll unit. ラップ上端面のチップシールの配置状態の説明図である。It is explanatory drawing of the arrangement | positioning state of the chip seal of a lap upper end surface. 図２の破線で囲まれたＸ部分の拡大図である。FIG. 3 is an enlarged view of a portion X surrounded by a broken line in FIG. 2.
　以下、本発明の実施の形態について詳細に説明する。尚、本発明に係るスクロール型流体機械は、圧縮機或いは膨張機として使用することができるが、ここでは圧縮機の例で説明する。 Hereinafter, embodiments of the present invention will be described in detail. The scroll type fluid machine according to the present invention can be used as a compressor or an expander. Here, an example of a compressor will be described.
　図１～図４は本実施形態のスクロール型圧縮機の構成を示しており、図１は全体構成を示す断面図、図２はラップ側から見た固定スクロールの平面図、図３はラップ側から見た可動スクロールの平面図、図４はスクロールユニットの説明図である。 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, and FIG. 3 is a lap side. FIG. 4 is an explanatory view of the scroll unit.
　スクロール型圧縮機１は、中心軸方向に対向配置される固定スクロール２と可動スクロール３とを有するスクロールユニット４を備えている。固定スクロール２は、図２に示すように、底板２ａ上に渦巻状のラップ２ｂが一体に立設されている。可動スクロール３も、図３に示すように、同様に底板３ａ上に渦巻状のラップ３ｂが一体に立設されている。 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. As shown in FIG. 2, the fixed scroll 2 has a spiral wrap 2b erected on a bottom plate 2a. As shown in FIG. 3, the movable scroll 3 is similarly provided with a spiral wrap 3b standing on the bottom plate 3a.
　両スクロール２、３は、両ラップ２ｂ、３ｂを噛み合わせ、固定スクロール２のラップ２ｂの上端面が可動スクロール３の底板３ａに接触し、可動スクロール３のラップ３ｂの上端面が底板２ａに接触するように配設される。両ラップ２ｂ、３ｂの上端面には、チップシール溝２ｃ，３ｃ（図５に示す）が形成されてチップシール４０，４１が嵌め込まれている。 Both scrolls 2 and 3 mesh both wraps 2b and 3b, the upper end surface of the wrap 2b of the fixed scroll 2 contacts the bottom plate 3a of the movable scroll 3, and the upper end surface of the wrap 3b of the movable scroll 3 contacts the bottom plate 2a. Is arranged. Chip seal grooves 2c and 3c (shown in FIG. 5) are formed on the upper end surfaces of both wraps 2b and 3b, and chip seals 40 and 41 are fitted therein.
　また、両スクロール２、３は、図４に示すように、両ラップ２ｂ、３ｂの周方向の角度が互いにずれた状態で、両ラップ２ｂ、３ｂの側壁が互いに部分的に接触するように配設されている。これにより、両ラップ２ｂ、３ｂ間に三日月状の密閉空間である流体ポケット５が形成される。尚、図４中の破線は、可動スクロール３の底板３ａの外縁部を示している。 Further, as shown in FIG. 4, 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. In addition, the broken line in FIG. 4 has shown the outer edge part of the baseplate 3a of the movable scroll 3. FIG.
　可動スクロール３は、駆動機構と後述する自転阻止機構３０により、固定スクロール２の中心軸回りに公転運動され、自転が阻止される。これにより、両ラップ２ｂ、３ｂ間に形成される流体ポケット５が、両ラップ２ｂ、３ｂの外周部から中央部へ向かって移動されることにより、流体ポケット５の容積が縮小方向に変化する。従って、ラップ２ｂ、３ｂの外周部側から流体ポケット５内に取込まれた流体（例えば冷媒ガス）が圧縮される。 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. As a result, 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.
　尚、膨張機の場合には、流体ポケット５が逆にラップ２ｂ、３ｂの中央部から外周部へ向かって移動されることにより、流体ポケット５の容積が増大方向に変化し、ラップ２ｂ、３ｂの中央部側から流体ポケット５内に取込まれた流体が膨張される。 In the case of an expander, 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.
　スクロール型圧縮機１のハウジングは、スクロールユニット４を内包するセンターハウジング６と、その前側に配置されるフロントハウジング７と、後側に配置されるリアハウジング８とから構成されている。 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.
　センターハウジング６は、本実施形態では、固定スクロール２の底板２ａと一体にスクロールユニット４の筐体部（外殻シェル）として形成されている。但し、固定スクロール２とセンターハウジング６とを別部材として、センターハウジング６内に固定スクロール２を収納固定する構造としてもよい。センターハウジング６は、リア側が底板２ａにより閉止され、フロント側が開口している。 In this embodiment, 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. However, 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.
　フロントハウジング７は、センターハウジング６の開口部側にボルト（図示せず）により締結される。フロントハウジング７は、可動スクロール３をスラスト方向に支持すると共に、可動スクロール３の駆動機構を収納している。 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.
　フロントハウジング７は、その内部に、フロントハウジング７の外壁に形成される吸入ポート（図示せず）に接続する上記流体の吸入室９が形成されている。 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.
　フロントハウジング７及びセンターハウジング６には、圧縮機中心軸と平行な方向に延在して、フロントハウジング７側の吸入室９からセンターハウジング６側のスクロールユニット４の両ラップ２ｂ、３ｂの外周部付近へ、上記流体を案内する流体通路空間１０が形成されている。 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.
　リアハウジング８は、センターハウジング６における固定スクロール２の底板２ａ側にボルト（図示せず）により締結され、底板２ａ背面との間に上記流体の吐出室１１を形成している。固定スクロール２の底板２ａの中央部には、圧縮流体の吐出孔１２が形成され、吐出孔１２には一方向弁１３が付設されている。吐出孔１２は、一方向弁１３を介して吐出室１１に接続される。吐出室１１は、リアハウジング８の外壁に形成される吐出ポート（図示せず）に接続している。 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.
　上記流体は、吸入ポートからフロントハウジング７内の吸入室９に導入され、フロントハウジング７及びセンターハウジング６の流体通路空間１０を経由して、スクロールユニット４の外周部側からラップ２ｂ，３ｂの接触により形成される流体ポケット５内に取込まれ、圧縮に供される。圧縮された流体は、固定スクロール２の底板２ａの中央部に穿設された吐出孔１２から、リアハウジング８内の吐出室１１に吐出され、そこから吐出ポートを介して外部に導出される。 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.
　フロントハウジング７は、センターハウジング６の開口部側にボルト（図示せず）により締結される外周部の内側に、可動スクロール３の底板３ａ背面と対向し可動スクロール３からのスラスト力を、スラストプレート１４を介して受けるスラスト受け部１５を有する。 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.
　フロントハウジング７は、また、中央部に可動スクロール３の駆動機構の中核をなす駆動軸２０を回転自在に支承している。駆動軸２０の一端部側はフロントハウジング７外に突出しており、ここに電磁クラッチ２１を介してプーリ２２が取付けられている。従って、プーリ２２から電磁クラッチ２１を介して入力される回転駆動力により、駆動軸２０が回転駆動される。駆動軸２０の他端部側は、クランク機構を介して可動スクロール３に連結されている。 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.
　前記クランク機構は、本実施形態では、可動スクロール３の底板３ａ背面に突出形成された円筒状のボス部２３と、駆動軸２０の端部に設けたクランク２４に偏心状態で取付けた偏心ブッシュ２５と、を含んで構成され、前記偏心ブッシュ２５は前記ボス部２３の内部に軸受２６を介して嵌合している。尚、偏心ブッシュ２５には、可動スクロール３の動作時の遠心力に対向するバランサウエイト２７が取付けられる。 In the present embodiment, 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.
　自転阻止機構３０は、可動スクロール３の底板３ａ背面（フロントハウジング７のスラスト受け部１５に対向する）に形成された円形穴３１と、フロントハウジング７のスラスト受け部１５側に突設されてスラストプレート１４を貫通して前記円形穴３１に係合するピン３２とで構成される自転阻止部３３を、可動スクロール３の底板３ａ背面の外周縁近傍の周方向に沿って等間隔に複数（例えば４個）配置して構成されている。尚、自転阻止部３３は、少なくとも３個以上あれば、可動スクロール３は自転をすることなく固定スクロール２の軸心周りに公転旋回運動することができる。 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.
　かかる構成のスクロール型圧縮機１の動作について簡単に説明する。
　外部からの回転駆動力によりプーリ２２が回転すると、電磁クラッチ２１を介して駆動軸２０が回転し、クランク機構を介して可動スクロール３が、自転阻止機構３０により自転が阻止されつつ固定スクロール２の軸心周りに公転旋回運動する。可動スクロール３の公転旋回運動により、流体（冷媒ガス）が吸入ポートから吸入室９及び流体通路空間１０を経由してスクロールユニット４のラップ２ｂ、３ｂ間の流体ポケット５内に取込まれ、流体ポケット５の容積の縮小変化によって圧縮された流体は、固定スクロール２中央部の吐出孔１２から吐出室１１に吐出される。吐出室１１に吐出された流体は、吐出ポートを介して外部に導出される。 The operation of the scroll compressor 1 having such a configuration will be briefly described.
When the pulley 22 is rotated by a rotational driving force from the outside, the drive shaft 20 is rotated through the electromagnetic clutch 21, and the movable scroll 3 is rotated through the crank mechanism while the rotation preventing mechanism 30 prevents the rotation of the fixed scroll 2. Revolves around the axis. Due to the orbital revolving motion of the movable scroll 3, the fluid (refrigerant gas) is taken into the fluid pocket 5 between the wraps 2 b and 3 b of the scroll unit 4 from the suction port via the suction chamber 9 and the fluid passage space 10. The fluid compressed by the change of the volume of the pocket 5 is discharged from the discharge hole 12 at the center of the fixed scroll 2 to the discharge chamber 11. The fluid discharged into the discharge chamber 11 is led out to the outside through the discharge port.
　次に、本実施形態のスクロールユニット４の固定スクロール２及び可動スクロール３について詳述する。
　図２に示す固定スクロール２は、前述したように、底板２ａ上に渦巻状のラップ２ｂが一体に立設され、ラップ２ｂの上端面に、略コ字形のチップシール溝２ｃ（図５に示す）が形成されてチップシール４０が嵌め込まれている。また、底板２ａの中央部に圧縮流体の吐出孔１２が形成されている。前記ラップ２ｂの渦巻形状は、ラップ２ｂの中央部から外周部へ向かうに従って図５に示すラップ壁厚Ａが減少する（薄くなる）よう代数螺旋で形成されている。固定スクロール２は、鋳造後にエンドミル等によりラップ２ｂの仕上げ加工を行い、図２の破線で囲んだＸ部分を拡大した図６に示す仕上げ加工終点におけるラップ壁厚Ａを、チップシール４０の配置が可能な最小壁厚Ａsとなるように形成している。ここで、チップシール４０の配置が可能な最小壁厚Ａsとは、ラップ２ｂ上端面にチップシール４０を配置するためには図５に示すラップ２ｂ上端面端部からチップシール溝２ｃまでの壁厚Ｂ１，Ｂ２（Ｂ１はラップ２ｂ外壁からチップシール溝２ｃまでの壁厚、Ｂ２はラップ２ｂ内壁からチップシール溝２ｃまでの壁厚）がある程度必要であり、側壁厚さＢ１，Ｂ２の必要最小限の厚さＢ１s，Ｂ２sにチップシールの幅ｃ（一定）を加えた厚さである。ここで、Ｂ１s＝Ｂ２sとなるので、最小壁厚Ａsは、Ａs＝２×Ｂ１s（又はＢ２s）＋ｃとなる。更に、固定スクロール２のチップシール溝２ｃの螺旋形状（チップシール溝２ｃのプロファイル）を、ラップ２ｂの中央部からラップ２ｂの外周部の仕上げ加工終点近傍まではラップ２ｂの中央部より外壁側寄りに外壁に沿ってラップ２ｂ外壁からチップシール溝２ｃまでの距離（図５の壁厚Ｂ１）が一定となるよう形成し、仕上げ加工終点近傍からチップシール溝２ｃ終端まではラップ２ｂの中央部より内壁側寄りに内壁に沿ってラップ２ｂ内壁からチップシール溝２ｃまでの距離（図５の壁厚Ｂ２）が一定となる形成してある。即ち、図６に示す仕上げ加工終点近傍の前後で、チップシールの配置形態を切替えている。 Next, the fixed scroll 2 and the movable scroll 3 of the scroll unit 4 of this embodiment will be described in detail.
In the fixed scroll 2 shown in FIG. 2, as described above, 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. Here, 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. This is a thickness obtained by adding a chip seal width c (constant) to the minimum thickness B1 s and B2 s . Here, since B1 s = B2 s , the minimum wall thickness A s is A s = 2 × B1 s (or B2 s ) + c. Further, 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. 5) is formed to be constant along the outer wall, and from the vicinity of the finish processing end point to the end of the tip seal groove 2c from the center of the wrap 2b A distance from the inner wall of the wrap 2b to the tip seal groove 2c (wall thickness B2 in FIG. 5) is formed along the inner wall closer to the inner wall side. In other words, the tip seal arrangement is changed before and after the finishing end point shown in FIG.
　図３に示す可動スクロール３は、前述したように、同じく底板３ａ上に渦巻状のラップ３ｂが一体に立設され、ラップ３ｂの上端面に、略コ字形のチップシール溝３ｃ（図５に示す）が形成されてチップシール４１が嵌め込まれている。前記ラップ３ｂの渦巻形状は、固定スクロール２のラップ２ｂと同様で、ラップ３ｂの中央部から外周部へ向かうに従ってラップ壁厚が減少する（薄くなる）よう代数螺旋で形成されている。可動スクロール３も、同様に鋳造後にエンドミル等によりラップ３ｂの仕上げ加工を行い、仕上げ加工終点におけるラップ３ｂの壁厚が少なくともチップシール４１が配置可能な最小壁厚以上となるよう形成している。また、可動スクロール３のチップシール溝３ｃの螺旋形状（チップシール溝２ｃのプロファイル）も、固定スクロール２と同様で、ラップ３ｂの中央部からラップ３ｂの外周部の仕上げ加工終点近傍まではラップ３ｂの中央部より外壁側寄りに外壁に沿ってラップ３ｂ外壁からチップシール溝３ｃまでの距離（図５の壁厚Ｂ１）が一定となるよう形成し、仕上げ加工終点近傍からチップシール溝３ｃ終端まではラップ３ｂの中央部より内壁側寄りに内壁に沿ってラップ３ｂ内壁からチップシール溝３ｃまでの距離（図５の壁厚Ｂ２）が一定となる形成してあり、仕上げ加工終点近傍の前後で、チップシールの配置形態を切替えている。尚、可動スクロール３のチップシール溝３ｃの螺旋形状は、ラップ３ｂの中央部からチップシール溝３ｃ終端まで切替えることなく、ラップ３ｂ内壁からチップシール溝２ｃまでの距離が一定となるよう形成してもよい。 As described above, in the movable scroll 3 shown in FIG. 3, 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. Similarly, 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. 5) is made constant along the outer wall closer to the outer wall side from the center of the center, from the vicinity of the finishing end point to the end of the chip seal groove 3c Is formed so that the distance (wall thickness B2 in FIG. 5) from the inner wall of the wrap 3b to the tip seal groove 3c is constant along the inner wall closer to the inner wall side than the central portion of the wrap 3b, 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.
　かかる構成のスクロール型圧縮機によれば、ラップ形状が代数螺旋の固定及び可動両スクロール２，３の仕上げ加工終点におけるラップ壁厚Ａを、チップシール４０，４１の配置が可能な最小壁厚Ａsとなるように形成したので、代数螺旋のラップ２ｂ，３ｂの外周部で確実にチップシール４０，４１を配置できる。従って、固定及び可動両スクロール２，３の小型軽量化ができ、延いてはスクロールユニット４の小型軽量化ができると共に、スクロールユニット４の軸方向のシール性を高めることができる。 According to the scroll type compressor having such a configuration, 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.
　また、固定スクロール２のラップ２ｂ上端面に配置するチップシール４０を、ラップ２ｂ中央部（巻き始め）からラップ２ｂ外周部（巻き終わり）の仕上げ加工終点近傍まではラップ２ｂの中央部より外壁側寄りに外壁に沿って配置したので、吐出孔１２の入口部が複雑な形状になっているラップ２ｂ中央部において、ラップ２ｂの内壁側寄りにチップシール４１を配置する場合と比較して、チップシール４１の巻き始めをよりラップ２ｂ中央部まで延ばして配置することができ、スクロールユニット４中央部におけるユニット軸方向のシール性が向上して流体の内部漏れを抑制できる。また、仕上げ加工終点近傍以降は、チップシール溝２ｃの螺旋形状を切替えて、仕上げ加工終点近傍からチップシール４１の終端部まではラップ２ｂの中央部より内壁側寄りに内壁に沿ってチップシール４０を配置するようにしたので、仕上げ加工終点近傍以降もチップシール溝２ｃの螺旋形状を切替えずにそのままラップ２ｂの中央部より外壁側寄りにチップシール４１を配置する場合と比較して、図４の破線で示す可動スクロール３の底板３ａ外縁部からはみだし難く、はみださない範囲でチップシール４０の巻き終わりを長く伸ばすことができ、スクロールユニット４の外周部におけるユニット軸方向のシール性が向上して流体の内部漏れも抑制できる。従って、スクロールユニット４の軸方向における流体の漏れを抑制でき、ラップの渦巻形状を代数螺旋で形成したスクロール型圧縮機の運転効率を向上できる。 Further, 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. It is difficult to protrude from the outer edge portion of the bottom plate 3a of the movable scroll 3 indicated by the broken line in FIG. 6, and the end of winding of the tip seal 40 can be extended long as long as it does not protrude, and the sealing performance in the unit axial direction at the outer peripheral portion of the scroll unit 4 This improves the internal leakage of the fluid. Accordingly, fluid leakage in the axial direction of the scroll unit 4 can be suppressed, and the operation efficiency of the scroll compressor in which the spiral shape of the wrap is formed by an algebraic spiral can be improved.
　尚、本実施形態では、固定及び可動両スクロール２，３の仕上げ加工終点のラップ壁厚をチップシールの配置可能な最小壁厚Ａsとしたが、固定及び可動両スクロール２，３の一方だけ、仕上げ加工終点のラップ壁厚をチップシールの配置可能な最小壁厚Ａsとしてもよい。 In this embodiment, the fixed and although the wrap wall thickness of the finishing end point of the movable both scrolls 2 and 3 was deployable minimum wall thickness A s of the tip seal, only one of the fixed and movable both scrolls 2,3 the wrap wall thickness of the finishing end point may be placeable minimum wall thickness a s of the tip seal.
　また、本実施形態では、固定スクロール２のラップ２ｂ上端面に配置するチップシール４０を、ラップ２ｂ中央部（巻き始め）からラップ２ｂ外周部（巻き終わり）の仕上げ加工終点近傍まではラップ２ｂの中央部より外壁側寄りに外壁に沿って配置したが、ラップ２ｂ上端面の略中央部に配置するようにしてもよい。 Further, in this embodiment, 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). Although it arrange | positioned along the outer wall near the outer wall side from the center part, you may make it arrange | position to the approximate center part of the wrap 2b upper end surface.
１　　スクロール型圧縮機
２　　固定スクロール
２ａ　　底板
２ｂ　　ラップ（固定スクロール側）
２ｃ　　チップシール溝（固定スクロール側）
３　　可動スクロール
３ａ　　底板
３ｂ　　ラップ（可動スクロール側）
３ｃ　　チップシール溝（可動スクロール側）
４　　スクロールユニット
５　　流体ポケット（密閉空間）
２０　　駆動軸
２３　　ボス部
２４　　クランク
２５　　偏心ブッシュ
３０　　自転阻止機構
４０，４１　　チップシール 1 Scroll type compressor 2 Fixed scroll 2a Bottom plate 2b Wrap (fixed scroll side)
2c Tip seal groove (fixed scroll side)
3 Movable scroll 3a Bottom plate 3b Wrap (movable scroll side)
3c Chip seal groove (movable scroll side)
4 Scroll unit 5 Fluid pocket (sealed space)
20 Drive shaft 23 Boss portion 24 Crank 25 Eccentric bush 30 Rotation prevention mechanism 40, 41 Tip seal

Claims (4)

  1. 　底板に渦巻状のラップが立設され、ラップの上端面に形成したチップシール溝にチップシールを配置した固定スクロール及び可動スクロールを、互いに対向させて互いのラップを噛み合わせ、自転が阻止された前記可動スクロールが前記固定スクロール材に接しつつ公転し、互いのラップ間に公転に伴って容積変化する密閉空間を形成するスクロールユニットを備え、前記両スクロールのラップの渦巻形状を、ラップの中央部から外周部へ向かうに従ってラップ壁厚が減少する代数螺旋で形成したスクロール型流体機械であって、
    　前記両スクロールの少なくとも一方のスクロールにおけるラップ外周部の仕上げ加工終点近傍のラップ壁厚を、前記チップシールの配置が可能な最小壁厚としたことを特徴とするスクロール型流体機械。     A spiral wrap was erected on the bottom plate, and a fixed scroll and a movable scroll in which a tip seal was placed in a tip seal groove formed on the upper end surface of the wrap were opposed to each other so that the wraps were engaged with each other, preventing rotation. The movable scroll revolves in contact with the fixed scroll member, and includes a scroll unit that forms a sealed space that changes in volume with the revolution between the laps. A scroll type fluid machine formed by an algebraic spiral whose wrap wall thickness decreases from the outer periphery to the outer periphery,
    A scroll type fluid machine characterized in that a lap wall thickness in the vicinity of a finishing end point of an outer peripheral portion of a lap in at least one of the two scrolls is set to a minimum wall thickness at which the tip seal can be arranged.
  2. 　前記両スクロールのラップ外周部の仕上げ加工終点近傍のラップ壁厚を、前記チップシールの配置が可能な最小壁厚とした請求項１に記載のスクロール型流体機械。 2. The scroll type fluid machine according to claim 1, wherein a lap wall thickness in the vicinity of a finishing end point of a wrap outer peripheral portion of both scrolls is set to a minimum wall thickness at which the tip seal can be arranged.
  3. 　前記両スクロールのうちの少なくとも固定スクロールの前記チップシール溝の螺旋形状を、ラップ中央部からラップ外周部の仕上げ加工終点近傍まではラップ上端面の中央部よりラップ外壁側寄りとなるように、前記仕上げ加工終点近傍からチップシール溝終端まではラップ上端面の中央部よりラップ内壁側寄りとなるように、前記仕上げ加工終点近傍で切替える請求項１又は２に記載のスクロール型流体機械。 The spiral shape of the tip seal groove of at least the fixed scroll of the two scrolls, from the center of the lap to the vicinity of the finishing end of the outer periphery of the wrap, is closer to the wrap outer wall side than the center of the wrap upper end surface. 3. The scroll type fluid machine according to claim 1, wherein the scroll type fluid machine is switched in the vicinity of the finishing process end point so as to be closer to the inner wall side of the lap from the center of the upper end surface of the lap from the vicinity of the finishing process end point to the end of the chip seal groove.
  4. 　前記両スクロールのうちの少なくとも固定スクロールの前記チップシール溝の螺旋形状を、ラップ中央部からラップ外周部の仕上げ加工終点近傍まではラップ上端面の略中央部となるように、前記仕上げ加工終点近傍からチップシール溝終端まではラップ上端面の中央部よりラップ内壁側寄りとなるように、前記仕上げ加工終点近傍で切替える請求項１又は２に記載のスクロール型流体機械。 In the vicinity of the finishing end point, the spiral shape of the tip seal groove of at least the fixed scroll of the two scrolls is substantially the center of the upper end surface of the lap from the center of the lap to the vicinity of the finishing end of the outer periphery of the lap. 3. The scroll type fluid machine according to claim 1, wherein switching from the center of the upper end surface of the wrap to the inner wall side of the lap is performed in the vicinity of the finish processing end point from the center of the lap upper end surface to the tip seal groove end.
PCT/JP2015/075822 2014-09-18 2015-09-11 Scroll-type fluid machine WO2016043132A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04279785A (en) * 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd Scroll type compressor
JPH0727065A (en) * 1993-07-07 1995-01-27 Hitachi Ltd Scroll type fluid machine
JPH08151981A (en) * 1994-09-30 1996-06-11 Toshiba Corp Machine for transferring operating fluid
JPH10288172A (en) * 1997-04-10 1998-10-27 Sanden Corp Scroll member for scroll type fluid machinery
JP2014152748A (en) * 2013-02-13 2014-08-25 Panasonic Corp Scroll compressor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60171983U (en) * 1984-04-25 1985-11-14 三菱重工業株式会社 Scroll type fluid machine
TW330969B (en) * 1994-09-30 1998-05-01 Toshiba Co Ltd Fluid machine
JP4088570B2 (en) * 2003-05-08 2008-05-21 松下電器産業株式会社 Non-rotating cutting tool
JP2015048743A (en) * 2013-08-30 2015-03-16 株式会社ケーヒン Scroll-type compressor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04279785A (en) * 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd Scroll type compressor
JPH0727065A (en) * 1993-07-07 1995-01-27 Hitachi Ltd Scroll type fluid machine
JPH08151981A (en) * 1994-09-30 1996-06-11 Toshiba Corp Machine for transferring operating fluid
JPH10288172A (en) * 1997-04-10 1998-10-27 Sanden Corp Scroll member for scroll type fluid machinery
JP2014152748A (en) * 2013-02-13 2014-08-25 Panasonic Corp Scroll compressor

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