EP1225338A2 - Compresseur à spirales - Google Patents

Compresseur à spirales Download PDF

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Publication number
EP1225338A2
EP1225338A2 EP02000930A EP02000930A EP1225338A2 EP 1225338 A2 EP1225338 A2 EP 1225338A2 EP 02000930 A EP02000930 A EP 02000930A EP 02000930 A EP02000930 A EP 02000930A EP 1225338 A2 EP1225338 A2 EP 1225338A2
Authority
EP
European Patent Office
Prior art keywords
scroll
base
machine
scroll portion
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02000930A
Other languages
German (de)
English (en)
Other versions
EP1225338A3 (fr
Inventor
Tatsushi c/o K.K. Toyota Jidoshokki Mori
Masao c/o K.K. Toyota Jidoshokki Iguchi
Yasushi c/o K.K. Toyota Jidoshokki Watanabe
Yoshio c/o K.K. Toyota Jidoshokki Fujita
Shinsuke c/o K.K. Toyota Jidoshokki Asou
Yoshiharu c/o K.K. Toyota Jidoshokki Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
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 Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1225338A2 publication Critical patent/EP1225338A2/fr
Publication of EP1225338A3 publication Critical patent/EP1225338A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/10—Manufacture by removing material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/4924—Scroll or peristaltic type

Definitions

  • the present invention relates to a scroll-type compressor, a scroll thereof, and a method of manufacturing the scroll.
  • a scroll-type compressor comprises a fixed scroll and a movable scroll.
  • a scroll has a structure in which a scroll portion (or scroll lap) is provided on a surface of a base (or an end plate portion or a mirror plate), and in a state in which the fixed scroll and the movable scroll are engaged with each other, a compression chamber, which is a crescent-shaped and substantially closed space, is formed between the outer side surface and the inner side surface of the scroll portions of both scrolls.
  • the compression chamber moves from the peripheral portion of the scrolls to the central portion thereof and the volume of the compression chamber decreases as it moves in. The gas enclosed in the compression chamber is compressed thereby and discharged from a discharge port formed in the central portion.
  • the inner side surface and the outer side surface of the scroll portions, and the front end surface and the inner side surface of the base of the scroll portions of the fixed scroll and the movable scroll come into contact with each other or come very close in with each other to prevent the gas in the compression chamber from flowing to the outside with all possible effort.
  • the movable scroll is revolved with the scroll portion thereof being kept in contact with the scroll portion of the fixed scroll.
  • both the scroll portions of the fixed scroll and the movable scroll are made to come into contact with each other at both the ends in the circumferential direction of each compression chamber, and it is preferable that as many points as possible, in plural points to be contacted, are made to come into contact and the degree of contour (when the actual contour is within +/- H ⁇ m from the true contour, the degree of contour is said to be 2H ⁇ m) of the outer side surfaces and the inner side surfaces of the both scroll portions is, for example, 70 ⁇ m or less, or more preferably, 40 ⁇ m or less, so that clearances are as small as possible even if there exist portions not in contact with each other.
  • a revolving mechanism which revolves the movable scroll, has a function to maintain the posture of the movable scroll (self-rotation preventing function), independently (without the help of the fixed scroll) and the scroll of the movable scroll is revolved without the scroll portion thereof being in contact with the scroll portion of the fixed scroll.
  • the measure of the clearances between the inner side surface and the outer side surface of the scroll portion is required to be within the specified range, and it is necessary that the degree of contour of the inner side surface and the outer side surface of the scroll portion is, for example, 40 ⁇ m or less to meet the requirement.
  • the height from the inner side surfaces of the base to the front end surfaces of the scroll portion is within the specified range and in such a case, the flatness thereof and the parallelism therebetween are need to be, for example, 20 ⁇ m or less.
  • the present invention has been developed to reduce the manufacturing cost of the scroll further than before, with the fact mentioned above being the background, and the present invention can provide the following scroll-type compressors, scrolls for them, and the scroll manufacturing methods, which will be described in each aspect below.
  • the individual aspects are classified into sections, each section is numbered, and if necessary, other aspects are quoted in description. This is only to facilitate understanding of the present invention, and it should not be considered that the technical characteristics described in the present specifications and the combination of these characteristics are restricted to those described in each section. If plural items are described in a section, it does not mean that the plural items should be always employed all together. It is also possible to select and employ only part of those items.
  • a main body 10 of a scroll-type compressor comprises plural members of the main body such as a front housing 12, a center housing 14, and a rear housing 16.
  • the center housing 14 in the present embodiment is comprised integrally with a fixed scroll 18, which will be described in detail later.
  • the front housing 12 and the rear housing 16, being positioned in place respectively, are fixed to end surfaces 20 and 22, of the center housing 14, which are separated in the axial direction by plural bolts 24 and 25 (refer to FIG.2), which are the fixing means.
  • Reference number 26 indicates positioning pins used to position the center housing 14 and the front housing 12 when fixing them.
  • positioning pins 28 are also provided, which are engaged with both the center housing 14 and the rear housing 16 and position them.
  • the fixed scroll 18 comprises a nearly disk-shaped base 34 and a scroll-shaped scroll portion 38 erected in the direction perpendicular to an inner side surface 36, which is a surface of the front housing 12 side of the base 34, from the inner side surface 36.
  • a cylindrical housing portion 39 which extends in the direction perpendicular to the inner side surface 36 and is higher (longer) than the scroll portion 38 (axial length), is formed integrally.
  • a nearly rectangular plate-shaped flange portion 40 is formed as a mounting portion, and the center housing 14 and the front housing 12 are fixed by tightening the bolts 24 into the bolt holes 41 (refer to FIG.2) formed in the four corners of the flange portion 40 and female screw holes (not shown in drawings) formed in the corresponding locations of the front housing 12.
  • a cylindrical boss 44 is formed integrally, and the center housing 14 and the rear housing 16 are fixed by tightening the bolts 25 into female screw holes 46 (refer to FIG.2) formed in the end surface 22, which is the front end surface of the boss 44, and bolt holes 47 formed in the rear housing 16.
  • the movable scroll 32 also has a shape similar to the fixed scroll 18 and comprises a disk-shaped base 50 and a scroll portion 54 erected in the direction perpendicular to an inner side surface 52, which is a surface of the rear housing 16 side of the base 50, from the inner side surface 52, as shown in FIG.1, and a central axis O 1 of the fixed scroll 18 and a central axis O 2 of the movable scroll 32 are combined with each other eccentrically with the state in which the scroll portion 54 comes into contact with the scroll portion 38 of the fixed scroll 18 at plural points or comes close therewith, as shown in FIG.3.
  • the movable scroll 32 is driven by a drive shaft 60 shown in FIG.1.
  • the drive shaft 60 is provided concentrically with the fixed scroll 18 and supported rotatably by the front housing 12 via a ball bearing 62.
  • One end of the drive shaft 60 protrudes to the outside while the hermeticity between the drive shaft 60 and the front housing 12 is maintained by a sealing device, and the front end of the protruded portion of the drive shaft 60 is connected to an engine, the source of a driving force, via a clutch device such as an electromagnetic clutch and a belt, and on the inner end on the opposite side thereof, an eccentric pin 64 and a balance weight 66 are provided integrally.
  • the eccentric pin 64 is positioned eccentrically with respect to the main body of the drive shaft 60 and arranged in a large-diameter hole 68, which is a stepped hole formed in the front housing 12.
  • a bushing 69 is supported rotatably.
  • the bushing 69 is inserted rotatably, via a needle bearing 74 into, a boss 72 formed in the center of an outer side surface 70, which is a surface opposite to the inner side surface 52 on which the scroll portion 54 of the base 50 of the movable scroll 32 is provided. Therefore, when the drive shaft 60 is rotated, the movable scroll 32 is revolved (orbitted) around the revolving central line of the drive shaft 60 by the eccentric pin 64.
  • a self-rotation preventing mechanism 80 which prevents the self-rotation while allowing the revolution of the movable scroll 32.
  • the self-rotation preventing mechanism 80 is described below.
  • each pair of self-rotation preventing pins 86 and 88 extend in parallel to each other at a distance equal to the revolution radius (orbit radius) of the movable scroll 32.
  • a self-rotation preventing ring 90 is inserted with the protruded end portions of each pair of self-rotation preventing pins 86 and 88. This means that the self-rotation ring 90 loosely connects a pair of self-rotation preventing pins 86 and 88 and the distance between the two self-rotation pins 86 and 88, which is restricted by the inner diameter of the self-rotation preventing rings 90, is set nearly equal to the revolution radius of the movable scroll 32.
  • These self-rotation preventing pins 86 and 88, and the self-rotation preventing rings 90 constitute the self-rotation preventing mechanism 80, and the self-rotation preventing mechanism 80 allows the revolution (orbit) about the central axis O 1 of the fixed scroll 18, as the center axis of the revolution, while preventing the self-rotation (rotation on its own central axis O 2 ) of the movable scroll 32.
  • the insertion holes 82 of the movable scroll 32 constitute an engagement portion at which the engagement with the self-rotation preventing mechanism 80 is attained.
  • the revolution mechanism and the self-rotation preventing mechanism collaborate in constituting the mechanism that revolves the movable scroll 32 while preventing the self-rotation of the movable scroll 32.
  • the fixed scroll 18 and the movable scroll 32 collaborate in forming a compression chamber 100.
  • the scroll portion 54 of the movable scroll 32 is made to come into contact with the scroll portion 38 of the fixed scroll 18 at plural points or come close in therewith, and forms the plural crescent-shaped compression chambers 100, with these substantial contact points being the border.
  • each of these compression chambers 100 increases its volume once as the contact points between the scroll portion 38 and the scroll portion 54 move toward the center portion, and then it decreases its volume while moving toward the central portion.
  • the compression chamber 100 compresses the refrigerant gas, which flows into a suction chamber 110 in the housing portion 39 via a suction hole (not shown in the drawings), as the volume of the compression chamber 100 decreases, and discharges the compressed gas from a discharge port 112 to a discharge chamber 116.
  • the discharge port 112 is formed in the center of the base 34 of the fixed scroll 18 and a discharge valve 114 is provided at the opening of the discharge side thereof to prevent the counter-flow of the gas.
  • the discharge chamber 116 is formed by the cooperation of the boss 44 of the fixed scroll 18 and the rear housing 16 and the refrigerant gas discharged thereto via the discharge port 112 is further sent to an outer circulating passage via a discharge hole 118 (refer to FIG.2).
  • the inner side surfaces 36 and 52 of both the bases 34 and 50, and front end surfaces 120 and 122 of the scroll portions 38 and 54, which are located farthest from the bases 34 and 50, are made to come close to the opposing bases 50 and 34, respectively, and sealing performance is maintained to a certain level.
  • chip seals 126 and 128 are arranged on the front end surfaces 120 and 122, respectively, to improve sealing performance.
  • a seal groove 130 is formed on the scroll-shaped front end surface 120 of the scroll portion 38 of the fixed scroll 18, which opposes the base 50 of the movable scroll 32, in the longitudinal direction of the front end surface 120, and the string type chip seal 126 is arranged in a scroll layout in the seal groove 130.
  • the chip seal 126 is made of synthetic resin such as a fluoro-resin, has a length that corresponds to that of the seal groove 130, is made to protrude slightly from the front end surface 120 of the scroll portion 38 and at the same time, is made to come into contact with the base 50 of the movable scroll 32 slidably.
  • a similar seal groove 134 is also formed on the scroll-shaped front end surface 122 of the scroll portion 54 of the movable scroll 32, and the above-mentioned chip seal 128 is arranged therein.
  • the scroll portion 38 of the fixed scroll 18 and the scroll portion 54 of the movable scroll 32 have such a shape that the thickness thereof decreases gradually in the direction from the proximal ends of the bases 34 and 50 side thereof to the front ends thereof, as shown exaggeratedly in FIG.4, and the fixed scroll 18 and the movable scroll 32 can be reduced in weight because it is possible not only to increase the strength by increasing the thickness of the proximal end where the bending moment is large, but also to make the front end thinner.
  • a rounded portion 140 is formed, as shown enlargedly in FIG.5, therefore, the concentration of stress thereof is mitigated.
  • a rounded portion 144 corresponding to the rounded portion 140 is formed on the front end of the scroll portion 54, and an increase in refrigerant gas leakage can be avoided. Similar rounded portions are also formed at the border between the scroll portion 54 and the base 50, and on the front end of the scroll portion 38. The portions, near the center of the scrolls 18 and 32, of the scroll portions 38 and 54 gradually increase their thickness along the spiral curve in the direction of approaching the center as shown in FIG.3.
  • the fixed scroll 18 and the movable scroll 32 are manufactured in die-cast of the material (aluminum or aluminum alloy), with aluminum being a predominant element, and the inner side surfaces, the outer side surfaces, and the front end surfaces 120 and 122 of the scroll portions 38 and 54, and the inner side surfaces 36 and 52 of the bases 34 and 50 are left as cast without machine work, and the chill layer is left.
  • the chill layer in which the change of crystallization rate of the primary crystal ⁇ ( ⁇ phase) and eutectic silicon is not continuous because the portion contiguous to the metal mold is quickly cooled and solidified when the molten metal poured into the metal mold is solidified, is hard and strong therefore the strength of the scroll portion 38 and 54 is improved because of the chill layer existing on the surfaces thereof.
  • the scroll portions 38 and 54 are incorporated in the main body 10 with the inner side surfaces and the outer side surfaces of the scroll portions 38 and 54 being left as cast. It is possible, however, to form a coating layer on the inner side surfaces and the outer side surfaces of the scroll portions 38 and 54 without machine work.
  • a coating layer it is preferable to form a hard plating layer such as Ni-B and Ni-P-B-W on, for example Ni-P, and furthermore to form thereon a synthetic resin layer such as polyamide/imide, epoxy resin, polyetheretherketone, phenol resin, and so on, which contain a solid lubricant. It is also possible to form only hard plating layers, to form a hard plating layer that contains a solid lubricant directly on or via another hard coating layer, or to form a coating layer using other various materials.
  • a scroll material 160 for manufacturing the movable scroll 32 (referred to as a scroll material 160 hereinafter) is die-cast.
  • the scroll material 160 comprises a disk-shaped base 162 and the scroll portion 54 perpendicularly erected on an inner side surface 164 of the base 162, which is similar to the case of the movable scroll 32 as a product.
  • the seal groove 134 is molded simultaneously by die-casting on the front end surface of the scroll portion 54.
  • positioning portions 168, 169, and 170 which protrude from plural points (three points in an example in the figure) equally spaced in the circumferential direction toward the outer circumferential side, are integrally formed.
  • an engagement hole 172 having the shape of an oval with a long axis in the radial direction is formed.
  • both side surfaces of the positioning portions 168, 169, and 170, which are separated in the axial direction of the scroll material 160, are located on the same planes of the inner side surface 164 and the outer side surface of the base 162, respectively.
  • a production metal mold 176 which is the main part of the metal mold machine used in the above-mentioned die-casting process, comprises a production first mold 178 (briefly referred to as the first mold 178 hereinafter unless necessary in particular) and a production second mold 180 (briefly referred to as the second mold 180 unless necessary in particular), which are opened and closed by making them come close to each other and separating them from each other as shown in FIG.7.
  • the first mold 178 has a cavity 184 that corresponds to the whole of the scroll portion 54, the part of the base 162 of the scroll portion 54 side, and the parts of the positioning portions 168, 169, and 170 of the scroll portion 54 side of the scroll material 160
  • the second mold 180 has a cavity 186 that corresponds to the rest (part apart from the scroll portion 54) of the base 162 of the scroll portion 160.
  • either one for example, the second mold 180
  • the first mold 178 is driven and made to come close to and separate from the second mold 180.
  • the direction, in which the first mold 178 is made to come close to and separate from, is that of the thickness of the base 162 of the scroll material 160 formed by the production metal mold 176.
  • a cavity 194 that corresponds to the shape of the scroll material 160 is formed by the above-mentioned cavities 184 and 186.
  • the cavity 194 is communicated with the inner space of a sleeve having a sprue via a channel 196.
  • a gate 198 At the end of the channel 196 of the cavity 194 side, a gate 198, the sectional area of which is smaller than that of the other portions is provided.
  • the molten metal in the present embodiment, aluminum alloy as an example of the materials in which aluminum is a predominant element
  • poured from the sprue is injected to the cavity 194 by an injection machine through the channel 196 and the gate 198.
  • the injection machine may comprise, for example, a plunger that is moved in the sleeve, a plunger chip which is provided on the front end thereof and is larger in diameter than the plunger, and a plunger drive machine (for example, a hydraulic cylinder).
  • a plunger drive machine for example, a hydraulic cylinder
  • the molten aluminum alloy is poured from the sprue of the sleeve and sent to the cavity 194 through the channel 196 and the gate 198 by the injection machine until the cavity 194 is filled, in the state in which the first and the second molds 178 and 180 are closed and the coupling surfaces 190 and 192 are close.
  • the molten metal is allowed to solidify for a specified period and the first mold 178 is separated from the second mold 180. Then the production metal mold 176 is opened and the scroll material 160 is drawn out.
  • the scroll portion 54 has such a shape that the thickness gradually decreases in the direction from the proximal end of the base 162 side to the front end, therefore, the shape can provide a draft angle of the first mold 178.
  • the rounded portions 140 and 144 shown in FIG.5 are formed together with the other parts by die-casting.
  • the scroll portion 54 of the scroll material 160 gradually increases in thickness in the direction toward the center thereof from the outer circumferential portion along the spiral curve.
  • the production metal mold 176 (the first mold 178 thereof) with a high accuracy is required in order to leave the inner side surface, the outer side surface, and the front end surface of the scroll portion 54 of the scroll material 160 as cast. Therefore, a trial die-casting process is performed prior to the die-casting process in the present embodiment.
  • a trial metal mold 200 shown in FIG.8 is used to cast a trial scroll material 206 that has a scroll portion 202 and a base 204, similar to the case with the scroll material 160.
  • the trial metal mold 200 has a trial first mold 208 and the second mold 180, which are opened and closed by making them come close to each other and separate from each other.
  • the trial first mold 208 has a cavity 210 similar to that of the production first mold 178.
  • the width, which is the measure perpendicular to the longitudinal direction of the portion that forms the scroll portion 202, of the cavity 210 of the trial first mold 208 is slightly narrower than that of the cavity 184 of the production first mold 178.
  • the trial scroll material 206 is cast using the trial metal mold 200 in the similar way as the above-mentioned die-casting process.
  • the dimensions of the scroll portion 202 of the obtained trial scroll material 206 are measured. Not only the dimensions of the inner side surface and the outer side surface of the scroll portion 202 are measured by a widely well-known dimension measuring machine such as a three coordinate measuring machine, but also the flatness of the inner side surface (the surface on which the scroll portion 202 is provided) of the base 204 is measured by a widely well-known flatness measuring machine, and furthermore, the flatness of the front end surface of the scroll 202 and the height thereto from the inner side surface of the base 204 are measured.
  • the parallelism between the front end surface of the scroll portion 202 and the inner side surface of the base 204 is also measured by a widely well-known parallelism measuring machine.
  • Each measured dimension, described above, is compared with that of the portion that forms the scroll portion 202 of the cavity 210 of the trial first mold 208, and the dimensional difference between the dimension of the scroll portion 202 of the trial scroll material 206 and that of the portion which forms the scroll portion 202 of the cavity 210 is obtained.
  • This dimensional difference represents the amount of the distortion and heat contraction of the trial scroll material 206, which occur when the trial metal mold 200 is used for casting, and is the data indicating how to modify the shape and dimensions of the cavity 184 of the first mold 178 of the production metal mold 176 in order to obtain a scroll material having a scroll portion of desired shape and dimensions.
  • a cavity the surface configuration of which is just reverse to that of a scroll material equipped with a scroll portion of desired shape and dimensions, is modified in advance to eliminate the dimensional difference indicated by the above-mentioned data, it is possible to cast a scroll material equipped with a scroll portion of desired shape and dimensions.
  • the measuring process is described as above.
  • additional work which includes the modification required to eliminate the dimensional difference plus the compensation corresponding to the dimensional amount by which the trial first mold 208 is made narrower in width than the cavity 184 of the production first mold 178, as already described, is applied to the cavity 210 of the trial first mold 208.
  • the production first mold 178 equipped with the cavity 184 which has an appropriate shape and dimensions to form the scroll portion 54 with a true shape and dimensions, can be manufactured. In this manner the production first mold 178 with a high accuracy can be manufactured at a low cost.
  • the production first mold 178 can be manufactured so that degree of contour between the inner side surface and the outer side surface of the scroll portion 54 of the scroll material 160 formed by the production first mold 178 is 40 ⁇ m or less, and at the same time the flatness of the front end surface of the scroll portion 54 and the inner side surface of the base 162 and the parallelism therebetween are 20 ⁇ m or less, respectively.
  • This production first mold 178 is used as a component of the production metal mold 176 in the die-casting process mentioned above.
  • the trial metal mold is made to comprise a trial first mold having a cavity of a shape and dimensions corresponding to the true shape and dimensions of the scroll portion (that is, the surface configuration is just reversed to those of the scroll portion with the true shape and dimensions and the dimensions are appropriate), and then the production first mold equipped with a cavity having the true shape and dimensions may be manufactured based on the dimensional difference obtained by comparing the dimensions of the scroll portion, and so on, of the trial scroll material cast by this trial metal mold and the dimension of the cavity of the trial first mold.
  • Machine work is applied to the scroll material 160 cast in the die-casting process.
  • the inner side surface, the outer side surface, and the front end surface of the scroll portion 54 of the scroll material 160 are not machine-worked but left as cast, and machine work is applied to the base 162 of the scroll material 160, with the scroll portion 54 being the work basis.
  • machine work is carried out, with the positioning portions 168, 169, and 170, and the engagement hole 172 cast at the same time as the scroll portion 54 being the work basis. Therefore, the movable scroll 32 can be obtained with the dimensional accuracy almost equal to that when the machine work is carried out with the scroll portion 54 being the work basis.
  • the present machine working process is carried out with the scroll material 160 being held firmly with a chuck 230 as shown in FIG.9.
  • the chuck 230 in the present embodiment is of a three-jaw type and has three holding jaws 234, 236, and 238 that can be made to come close in with and separate from each other symmetrically with respect to the central axis of a chuck main body 232.
  • the three holding jaws 234, 236, and 238 are equally spaced at a specified angle. Since the structure of a three-jaw type chuck is widely known, detailed drawings and description are omitted here.
  • the holding jaws 234, 236, and 238 are held with these movable members, respectively.
  • the three movable members are guided by guide grooves 240 to move in synchronization with each other in the radial direction of the chuck main body 232, thereby the three holding jaws 234, 236, and 238 are made to come close in with and separate from each other, with the axis-symmetrical relationship to each other being maintained.
  • the front ends of the holding jaws 234, 236, and 238 are cut out and form holding surfaces 244 and receiving surfaces 246.
  • the holding surfaces 244 hold the positioning portions 168, 169, and 170, and are comprised of inner circumferential surfaces (planes contiguous to the outer circumferential surfaces of the positioning portions 168, 169, and 170 are included), the radius of curvature of which is larger than those of the positioning portions 168, 169, and 170.
  • the receiving surfaces 246 decide the position of the scroll material 160 in the axial direction by receiving the positioning portions 168, 169, and 170, and all the receiving surfaces 246 are located in a single plane perpendicular to the central axis of the chuck 230.
  • the engagement portion 248 has a diameter slightly smaller than the dimension of the width, of the engagement hole 172, perpendicular to the longitudinal direction, of the engagement hole 172, formed in the positioning portion 168, and is engaged with the engagement hole 172 so that movement of the engagement portion 248 in the direction of width is substantially disabled and relative movement, of the engagement portion 248 with respect to the engagement hole 172, in the longitudinal direction is allowed.
  • the scroll material 160 is held with the chuck 230 in the state in which the positioning portions 168, 169, and 170 are positioned in the holding surfaces 244 by making the holding jaws 234, 236, and 238 come close in with each other synchronously after the engagement hole 172 of the positioning portion 168 of the scroll material 160 is engaged with the engagement portion 248 of the holding jaw 234 to prevent the movement of the scroll material 160 in the circumferential direction with respect to chuck main body 232. Since the engaging hole 172 is made oval, it is ensured that the holding surface 244 of the holding jaw 234 comes into contact with the outer circumferential surface of the positioning portion 168.
  • the engagement portion 248, which is comprised of an engagement pin pressed into the pin hole formed in the receiving surface 246, is the engagement protrusion erected perpendicular on the receiving surface 246, in the present embodiment, it is possible to reverse the positions of the engagement hole 172 and the engagement portion 248. Moreover, it is possible to provide another circumferential position determining portion instead of the engagement hole 172 and the engagement portion 248. For example, it may be possible to form a plane located on a plane that includes the central axis of the chuck 230 on the holding jaw 234 and to make the side of the positioning portion 168 come into contact with the plane. It may be also possible to make the side of the positioning portion 168 come into contact with the engagement portion 248.
  • the scroll material 160 is positioned in the axial direction of the chuck 230 when the sides of the positioning portions 168, 169, and 170 of the scroll portion 54 side come into contact with the receiving surfaces 246 of the holding jaws 234, 236, and 238.
  • the sides of the positioning portions 168, 169, and 170 of the scroll portion 54 side are formed in the same plane as the inner side surface of the base 162, therefore, the outer side surface of the base 162 is eventually machine-worked with the axis directional basis of the inner side surface of the base 162. As a result, the outer side surface of the base 162 is worked so that it is precisely formed in a state parallel to the inner side surface of the base 162 and the front end surface of the scroll portion 54.
  • the outer circumferential surface of the base 162 is machine-worked as shown in FIG.11.
  • the outer circumferential surface of the boss 72 is held, being positioned in place, with a chucking machine 250 shown by the alternate long and two short dashes line in FIG.11, and the positioning portions 168, 169, and 170 formed integrally on the outer circumferential surface of the base 162 are removed and the outer circumferential surface are cutting-worked by work tools.
  • the boss 72 is cutting-worked with basis of the positioning portions 168, 169, and 170 formed at the same time as the scroll portion 54 in the die-casting process, therefore, if the boss 72 is taken as the work basis, it is almost equal to the case in which machine work is performed with the work basis of the scroll portion 54.
  • the scroll material is cast by die-casting, the surfaces of the scroll portion 38 formed by the die-casting are left as cast, and the end surfaces 20 and 22, the pin holes (engagement holes) into which the positioning pins 26 and 28 are pressed, and so on, are machine-worked.
  • the inner side surface, the outer side surface, and the front end surface of the scroll portion 38 and the inner side surface of the base 34 can be left as cast with a high dimensional accuracy by performing the trial die-casting process, the measuring process, the process to manufacture the production first mold, and so on, as described above.
  • the fixed scroll 18 comprises the housing portion 39, the flange portion 40 and the bolt holes 41, as described above, which are formed at the same time by the production first metal mold together with the scroll portion 54. Therefore, for example, if the housing portion 39 and the bolt holes 41 are used instead of the positioning portions 168, 169, and 170 and the engagement hole 172, to cutting-work the end surface 20 and the pin hole of the positioning pin 26, it is equivalent to the case in which those are worked with basis of the scroll portion 38. If, subsequently, the fixed scroll 18 is positioned in place with basis of these end surface 20 and the pin hole of the positioning pin 26 and if the end surface 22 and the pin hole of the positioning pin 28 are worked, then it is also equivalent to the case in which these are worked with basis of the scroll portion 38.
  • the fixed scroll 18 and the movable scroll 32 are cast by die-casting and the scroll portions 38 and 54 and the inner side surfaces 36 and 52 of the bases 34 and 50, which used to be machine-worked conventionally, are left as cast, therefore, machine work to these portions is no longer necessary and the amount of wasted materials produced by machine work is reduced, resulting in improvement of the yield of materials and reduction in the cost of production.
  • the time required for the machine working process can also be reduced, resulting in reduction of the cost of production.
  • the portions (the end surface 42 of the base 34, the insertion hole 82, boss 72, and so on) other than the scroll portion are machine-worked with the scroll portion 54 of the scroll material 160 that is cast by die-casting with a high dimensional accuracy being the work basis, the accuracy in position required for the product of the scroll portions 38 and 54 with respect to the portions other than the scroll portions 38 and 54 of the fixed scroll 18 and the movable scroll 32 is ensured.
  • the degree of contour of the scroll portions 38 and 54 of the fixed scroll 18 and the movable scroll 32 it is possible to control the degree of contour of the scroll portions 38 and 54 of the fixed scroll 18 and the movable scroll 32 to 40 ⁇ m or less and the flatness of the front end surfaces of the scroll portions 38 and 54 and the inner side surfaces of the bases 34 and 50 and the parallelism therebetween to 20 ⁇ m or less, respectively, and the clearances between the front end surfaces of the scroll portions 38 and 54 and the opposing inner side surfaces of the bases 34 and 50 of the scroll portions 38 and 54 fall in the setting range, with the state in which the fixed scroll 18 and the movable scroll 32 are combined in the main body 10.
  • a scroll-type compressor with stable performance can be obtained.
  • the holding jaws 234, 236, and 238 directly hold the outer circumferential surfaces of the scroll material 160.
  • a holding jig 300 which is used in the machine working process of the method of manufacturing a scroll in another embodiment of the present invention, is shown in FIG.12.
  • a jig main body 302 of the holding jig 300 is fixed coaxially to a main shaft 304 (shown by the alternate long and two short dashes line in FIG.12) of a work machine as mechanical working equipment, and functions as a part of the main shaft 304.
  • the holding jig 300 comprises a positioning jig 310 and a fixture 312, and in the present machine working process, machine work is applied to the base 162, and so on, with the state in which a scroll material 316 is positioned with the positioning jig 310 that is engaged physically with the scroll portion 54 of the scroll material 316 and the scroll material 316 is fixed by the fixture 312.
  • the scroll material 316 in the present embodiment does not comprise positioning portions or an engagement hole, unlike the scroll material 160 that comprises the positioning portions 168, 169, and 170 and the engaging hole 172, other portions are the same therefore the same symbols are assigned to the same components.
  • the positioning jig 310 used in the present embodiment comprises three or more engagement portions 320 (refer to FIG.14 through FIG.21) that are engaged with three or more points of the scroll portion 54.
  • the engagement portion 320 is a tapered pin member, which has an opening on an end surface 322 of the jig main body 302 opposite to the main shaft 304 and is erected vertically on a bottom surface 326 of a recess 324 that can house the scroll portion 54 and the diameter of which decreases toward the front end.
  • the tapered outer circumferential surface of the engagement portion 320 is inclined in accordance with the inclination of the outer side surface and the inner side surface of the scroll portion 54.
  • the scroll material 316 When the scroll material 316 is made to come into contact with a shoulder surface 330 formed between the end surface 322 and the bottom surface 326 of the jig main body 302 and with the bottom surface 326, being positioned in the axial direction of the main shaft 304, the tapered outer circumferential surface of the engagement portion 320 and the outer side surface or the inner side surface of the scroll portion 54 are made to come close in with each other.
  • the position at which the engagement portion 320 is engaged with the scroll portion 54 is selected so that the location of the center of the scroll material 316 and the rotational phase about the center thereof are determined uniquely. As shown in FIG.14, for example, one of the three engagement portions 320 comes into contact with the inner end, which is an end near the center of the scroll portion 54, in the direction almost parallel to the longitudinal direction of the scroll portion 54, and the other two engagement portions 320 are engaged with the outer side surface and the inner side surface of the scroll portion 54 at the position apart from the inner end of the scroll portion 54 toward the outer end, in a longitudinal direction.
  • the two engagement portions 320 to be engaged with the outer side surface and the inner side surface of the scroll portion 54 disable the relative rotation of the scroll portion 54 with respect to the positioning jig 310 in the direction of decreasing the radius of the engagement point with the engagement portion 320.
  • the relative rotation of the scroll portion 54 with respect to the positioning jig 310 in the direction of increasing the radius of the engagement point with the engaging portion 320 is also disabled, therefore, the location of center of the scroll material 316 can be determined uniquely and at the same time the relative rotation of the positioning jig 310 and the scroll material 316 in the normal and reverse direction is also disabled.
  • the scroll material 316 is fixed with the fixture 312, being thus positioned accurately by the positioning jig 310.
  • the fixture 312 is provided outside the end surface 322 and comprises plural (three in the present embodiment) engagement jaws 334, which are engaged with the outer side surface of the base 162. Although only two engagement jaws 334 are shown in FIG.12, the three engagement jaws 334 are equally spaced at the same angle intervals.
  • the base 162 is clamped from both sides by the engagement jaw 334 and the shoulder surface 330, or the scroll portion 54 and the base 162 are clamped from both sides by the engagement jaw 334 and the bottom surface 326, then the scroll material 316 is fixed to the jig main body 302.
  • the engagement jaw 334 is made to come close to or separate from the jig main body 302 by a drive unit 340.
  • the drive unit 340 comprises a hydraulic cylinder 342, which is a fluid pressure cylinder, as a drive power source.
  • the hydraulic cylinder 342 comprises a cylinder bore 344, the cross-section of which is circular, formed in the jig main body 302 in the direction parallel to the.axis of the main shaft 304, a piston 350 inserted into the cylinder bore 344 slidably and liquid-tightly, a piston rod 352 that extends in the axial direction from the piston 350, and a spring member 360 comprised of plural Belleville springs connected to each other in tandem, and the engagement jaw 334 is provided integrally on the front end of the piston rod 352.
  • the jig main body 302 functions also as a housing of the hydraulic cylinder 342.
  • the space in a large-diameter hole portion 346 of the cylinder bore 344 is divided into two spaces by the piston 350, the spring member 360 is housed in a chamber formed in the space of the piston rod 352 side, and a chamber formed in the space of the head side is connected to the hydraulic source via a liquid channel. If the hydraulic fluid is supplied to the chamber of the head side, the engagement jaw 334 is moved in such a direction so as to separate from the jig main body 302, resisting the biasing force of the spring member 360.
  • a cam groove 366 is formed on the outer circumferential surface of the piston rod 352, a cam follower 368 protrudes radially inward from the inner circumferential surface of the rod hole of the jig main body 302 as shown in FIG.13, and the cam groove 366 and the cam follower 368 are engaged with each other.
  • the cam groove 366 comprises an axial groove portion 370 that extends in the direction parallel to the axis and an inclined groove portion 372 that extends obliquely downward with respect to the axial direction from the axial groove portion 370.
  • the cam follower 368 is comprised of the front end portion of the pin members, which have a circular cross section and are fixed to the jig main body 302.
  • the piston rod 352 is extended while being guided by the engagement of the axial groove portion 370 with the cam follower 368. If the piston 350 is lifted up further, the inclined groove portion 372 and the cam follower 368 are engaged with each other and as a result, the piston rod 352 is extended while being rotated on its axis. Thereby, the engagement jaw 334 is rotated and moved to a point away from the base portion 162 while being separated from the base portion 162 and it will be easier to install or remove the scroll material 316 to or from the holding jig 300. It is also possible to provide the jig main body 302 with the cam groove 366 and to provide the piston rod 352 with the cam follower 368, respectively.
  • FIG.12 shows that the insertion hole 82 is formed in the base portion 162 and machine work is applied to the inner circumferential surface and the outer circumferential surface of the boss portion 72.
  • the outer circumferential surface of the base portion 162 is machine-worked in the state in which the boss portion 72 is held with the chuck unit, then the outer side surface of the base portion 162 is machine-worked in the state in which the outer circumferential surface of the base portion 162 is positioned and held with a holding unit such as a three-jaw chuck.
  • the holding unit prefferably comprises a receiving surface to receive the inner side surface of the base portion 162 (or front end surface of the scroll portion 54) as the chuck 160 does and, thereby, the outer side surface of the base portion 162 can be worked so that the parallelism thereof to the inner side surface of the base portion 162 and the front end surface of the scroll portion 54 is accurate.
  • the positioning jig may comprise four or more engagement portions.
  • the scroll material 316 can be positioned more stably and accurately.
  • one of the four engagement portions 320 is made to come into contact with the inner end of the scroll portion 54 in the direction almost parallel to the longitudinal direction of the scroll portion 54, the other three engagement portions 320 are engaged with the inner side surface of the scroll portion 54, and each central angle between two adjacent engagement portions 320 of the three is made smaller than 180 degrees, each central angle being almost equal to each other.
  • the three engagement portions 320 to be engaged with the inner side surface of the scroll portion 54 can disable the scroll material 316 from moving, in any radial direction, with respect to the positioning jig 310, unless the scroll material 316 is rotated.
  • the scroll material 316 is disabled also from relatively rotating, with respect to the positioning jig 310, in the direction, in which the radius of the scroll portion 54 at each engagement point with each engagement portion 320 decreases.
  • the engagement points of the four or more engagement portions may be other than those described above.
  • FIG.18 it is an applicable embodiment in which one of the four engagement portions 320 is made to come into contact with the outer end, of the scroll portion 54 of the scroll material 316, away from the center thereof in the direction almost parallel to the longitudinal direction of the scroll portion 54, the other three engagement portions 320 are engaged with the outer side surface of the scroll portion 54, and each central angle between two adjacent engagement portions of the three engagement portions 320 is made smaller than 180 degrees.
  • Each central angle between two adjacent engagement portions of the three engagement portions 320 is made almost equal to each other in the present embodiment.
  • the scroll material 316 can be positioned, in the state in which the relative movement, with respect to the positioning jig, in any direction in a plane perpendicular to the central line of the scroll material 316, is disabled, for the same reason as described in the embodiment shown in FIG.15.
  • the positioning jig 310 in the present embodiment comprises the four engagement portions 320.
  • the positions of two of the four engagement portions 320 are selected so that the two pinch the portion, at which the thickness of the portion gradually increases toward the center, from both inner side surface and the outer side surface of the scroll portion 54 almost in the direction of thickness, in the vicinity of the inner end of the scroll portion 54.
  • One of the other two engagement portions 320 is arranged in the vicinity of the inner end of the scroll portion 54 so as to be made to come into contact with the scroll portion 54 in the direction perpendicular to that in which the above-mentioned two engagement portions pinch the scroll portion 54, and the other one of the engagement portions 320 is engaged with the outer side surface, of the scroll portion 54, the radius of which is larger than those where the above-mentioned three engagement portions 320 are engaged.
  • the three engagement portions 320 located near the center of the scroll portion 54 improve the positioning accuracy of the portions near the center of the scroll portion 54
  • the other engagement portion 320 improves the positioning accuracy of the outer circumferential surface of the scroll portion 54 as well.
  • those of the embodiment shown in FIG.20 are also applicable.
  • the positioning jig 310 in the present embodiment comprises the four engagement portions 320. Two of the four engagement portions 320 are arranged so as to be engaged with the outer side surface of the scroll portion 54 of the scroll material 316 at two points separated from each other almost in the direction of the first diameter of the scroll material 316, and the other two engagement portions 320 are arranged so as to be engaged with the inner side surface of the scroll portion 54 at two points separated from each other almost in the direction of the second diameter, which is perpendicular to the first diameter.
  • the scroll material 316 can be positioned in the state in which the relative movement thereof, with respect to the positioning jig, in any direction in a plane perpendicular to the central line thereof, is disabled.
  • the machine working process in the present invention may be that in which the base portion, etc. are machine-worked in the state in which the scroll portion of the scroll material is held by the chuck.
  • a chuck 500 used in the present machine working process has a structure similar to that of a three-jaw chuck, and comprises plural holding jaws.
  • the chuck 500 comprises three holding jaws 510, 512, and 514 held movably along the three radii that extend radially from the central axis of a chuck main body 502 with the intervals of the same angle, and a holding jaw 516 installed to the chuck main body 502, the movement being disabled, as shown briefly in FIG.22.
  • the chuck 500 has the chuck main body 502 coaxially fixed to a main shaft 518 (shown with the alternate long and two short dashes in FIG.23) of the work machine, as a machine working unit, and functions as a part of the main shaft 518.
  • Guide grooves 520 extending in the direction of the three radii described above, are formed in the chuck main body 502, three movable members 522 are held movably, being guided by the guide grooved 520, and the holding jaws 510, 512, and 514 are provided integrally in the movable members 522.
  • the three movable members 522 When driven by a drive 530, the three movable members 522 are moved synchronously in the radial direction of the chuck main body 502, being guided by the guide grooves 520, and thereby the three holding jaws 510, 512, and 514 are made to come close in with and separate from each other by the same amount of distance.
  • the distance of each holding jaw 510, 512, and 514 from the central axis of the chuck main body 502 is made different from each other, however, and the distance of the holding jaw 514 from the central axis line is the largest, that of the holding jaw 512 is the second largest, and that of the holding jaw 510 is the smallest.
  • the holding jaws 510, 512, and 514 have such a shape that they can be inserted into the recess formed by the side surfaces of the scroll portion 54.
  • the drive 530 comprises a hydraulic cylinder 532, a kind of the fluid pressure actuator, as a drive source as shown in FIG.23.
  • the hydraulic cylinder 532 comprises a cylindrical housing 534 provided parallel to the axial direction of the main shaft 518, a piston 540, which is slidably and liquid-tightly inserted into a large diameter hole portion 536, with a stepped hole, that extends in the axial direction in the housing 534, and a piston rod 542 that extends in the axial direction from the piston 540.
  • the chuck main body 502 is designed to function as the housing 534 of the hydraulic cylinder 532 as well.
  • the piston rod 542 is held in the housing 534 so that the sliding motion is possible in a small diameter hole portion 544 of the stepped hole described above.
  • the space in the large diameter hole portion 536 is divided into two spaces by the piston 540, and a spring member 550, which is comprised of plural Belleville springs being connected to each other in tandem, is housed in the chamber formed near the piston rod 542, and is biased in the direction in which the piston rod 542 contracts.
  • the diameter of the large diameter hole portion 536 near the small diameter hole portion 544 is designed to be slightly smaller, and the spring member 550 is arranged thereto.
  • the other space of the large diameter hole portion 536 of the head side is connected to the hydraulic source via a liquid channel 552. If the hydraulic fluid is supplied to the space of the head side, the piston rod 542 is extended, resisting the biasing force of the spring member 550.
  • the piston rod 542 and the holding jaws 510, 512, and 514 are connected by a motion conversion device 560 and the extending and contracting motion of the piston rod 542 is converted to the closing and opening motion of the holding jaws 510, 512, and 514.
  • the motion conversion device 560 comprises drive members 562 and driven members 564.
  • the drive members 562 are comprised of pin members that are fixed integrally to a large diameter portion 568, which is provided integrally with the piston rod 542, with a state in which drive members 562 are inclined with respect to the central axis of the piston rod 542.
  • the drive members 562 are protruded forward from the front surface of the large diameter portion 568 and inclined so as to come closer to the central axis of the chuck main body 502 when advanced.
  • the driven members in the present embodiment 564 are formed integrally with the movable members 522 that hold the holding jaws 510, 512, and 514.
  • the driven members 564 are provided with an insertion holes, which are inclined in accordance with the drive members 562, and into which the drive members 562 can be inserted. Therefore, when the piston rod 542 of the hydraulic cylinder 532 is extended, the depth of insertion of the drive members 562 into the insertion holes of the driven members 564 increases, and the holding jaws 510, 512, and 514 are separated simultaneously from the central axis of the chuck main body 502 due to the effect of the slope. When the piston rod 542 is contracted, the holding jaws 510, 512, and 514 are made to come close in with each other.
  • the scroll material 316 is positioned in the axial direction when the inner side surface of the base portion 162 of the scroll material 316 comes into contact with the receiving surface, that is, the front end surface of the holding jaws 510, 512, and 514.
  • the holding jaws 510, 512, and 514 come into contact with the three points of the scroll portion 54 of the scroll material 316 almost in a perpendicular direction thereof, respectively, and the holding jaw 516 comes into contact with the outer end of the scroll portion 54 in a direction almost parallel to the longitudinal direction of the scroll portion 54.
  • the holding surface 574 holds the outer side surface of the scroll portion 54 and is designed to have a curved surface in accordance with the shape of each contact point of the scroll portion 54, or a surface the radius of curvature of which is slightly larger than that of each contact point.
  • the holding surface 576 is formed also on the end of the holding jaw 516 that holds the outer end of the scroll portion 54.
  • Machine work with work tools is applied to the outer side surface and outer circumferential surface of the base portion 162 of the scroll material 316, with the state in which the scroll portion 54 of the scroll material 316 is held with the chuck 500 of the present embodiment so that the relative movement, of the scroll material 316 with respect to the chuck 500, in any direction in a plane perpendicular to the central line thereof is disabled. Since the portions other than the scroll portion are machine-worked with the scroll portion 54 being the work basis, the position accuracy of the scroll portion 54 of the movable scroll 32, as a product, with respect to the portions other than scroll portion 54 is ensured, similarly as described in each embodiment.
  • the outer side surface of the base portion 162 is worked with the state in which the inner side surface of the base portion 162 is received by the front end surfaces of the holding jaws 510, 512, and 514, therefore, the movable scroll 32, the parallelism of which to the inner side surface and the outer side surface of the base portion 162 and the front end surface of the scroll portion 54 is excellent, can be obtained. Therefore, the fixed scroll 18 and the movable scroll 32 can be installed to the main body 10 successfully. Moreover, the outer side surface and the outer circumferential surface of the base portion 162 can be machine-worked simultaneously, while being held by the chuck 500, therefore, the machining efficiency is improved.
  • the contact points of the four holding jaws with the scroll portion of the scroll material are not restricted to those described in the present embodiments, but various contact points are possible as those engagement points of the engagement portions illustrated in each embodiment shown in FIG.14 through FIG.21. It is also possible to use a chuck that has five or more holding jaws.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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EP02000930A 2001-01-19 2002-01-16 Compresseur à spirales Withdrawn EP1225338A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001012512A JP2002213377A (ja) 2001-01-19 2001-01-19 スクロール型圧縮機，スクロールおよびその製造方法
JP2001012512 2001-01-19

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EP1225338A2 true EP1225338A2 (fr) 2002-07-24
EP1225338A3 EP1225338A3 (fr) 2003-07-30

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EP1281869A2 (fr) * 2001-08-01 2003-02-05 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales
EP1227245A3 (fr) * 2001-01-25 2003-07-09 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales
EP2141362A1 (fr) * 2007-03-30 2010-01-06 Daikin Industries, Ltd. Élément en spirale, son procédé de fabrication, mécanisme de compression et compresseur à spirales
EP2143950A1 (fr) * 2007-03-30 2010-01-13 Daikin Industries, Ltd. Élément en spirale, procédé de production de l'élément en spirale, mécanisme de compression et compresseur à spirales

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JP2005337189A (ja) * 2004-05-31 2005-12-08 Anest Iwata Corp スクロール流体機械における旋回スクロールの製造方法
CN100346075C (zh) * 2004-10-21 2007-10-31 恒升精密科技股份有限公司 压缩机的涡卷加工方法
JP3856034B2 (ja) * 2005-01-31 2006-12-13 ダイキン工業株式会社 固定スクロールの位置決め装置および位置決め方法
US7841845B2 (en) * 2005-05-16 2010-11-30 Emerson Climate Technologies, Inc. Open drive scroll machine
US7237525B1 (en) * 2006-08-08 2007-07-03 International Engine Intellectual Property Company, Llc Engine cast component having witness marks and method of machining same
JP2011247183A (ja) * 2010-05-27 2011-12-08 Sanden Corp スクロール型流体機械
US9347441B2 (en) * 2012-03-30 2016-05-24 Sabic Global Technologies B.V. Compressors including polymeric components
US9429149B2 (en) 2012-05-15 2016-08-30 Sabic Global Technologies B.V. Polyetherimide pump
US9328730B2 (en) * 2013-04-05 2016-05-03 Agilent Technologies, Inc. Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
US9890784B2 (en) * 2015-06-30 2018-02-13 Bitzer Kuehlmaschinenbau Gmbh Cast-in offset fixed scroll intake opening
WO2017056213A1 (fr) * 2015-09-30 2017-04-06 三菱電機株式会社 Compresseur à spirale
WO2018198648A1 (fr) * 2017-04-26 2018-11-01 三菱電機株式会社 Procédé de fabrication de compresseur à spirale

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EP1227245A3 (fr) * 2001-01-25 2003-07-09 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales
US6663365B2 (en) 2001-01-25 2003-12-16 Kabushiki Kaisha Toyota Jidoshokki Scroll type compressor
EP1281869A2 (fr) * 2001-08-01 2003-02-05 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales
EP1281869A3 (fr) * 2001-08-01 2003-07-02 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales
US6783338B2 (en) 2001-08-01 2004-08-31 Kabushiki Kaisha Toyota Jidoshokki Scroll type compressor having tip seals and a scroll coating layer
EP2141362A1 (fr) * 2007-03-30 2010-01-06 Daikin Industries, Ltd. Élément en spirale, son procédé de fabrication, mécanisme de compression et compresseur à spirales
EP2143950A1 (fr) * 2007-03-30 2010-01-13 Daikin Industries, Ltd. Élément en spirale, procédé de production de l'élément en spirale, mécanisme de compression et compresseur à spirales
EP2141362A4 (fr) * 2007-03-30 2015-01-07 Daikin Ind Ltd Élément en spirale, son procédé de fabrication, mécanisme de compression et compresseur à spirales
EP2143950A4 (fr) * 2007-03-30 2015-01-07 Daikin Ind Ltd Élément en spirale, procédé de production de l'élément en spirale, mécanisme de compression et compresseur à spirales
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US20020098100A1 (en) 2002-07-25
JP2002213377A (ja) 2002-07-31
EP1225338A3 (fr) 2003-07-30

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