WO2022054364A1 - Éléments coulissants, et compresseur et appareil de réfrigération utilisant lesdits éléments coulissants - Google Patents

Éléments coulissants, et compresseur et appareil de réfrigération utilisant lesdits éléments coulissants Download PDF

Info

Publication number
WO2022054364A1
WO2022054364A1 PCT/JP2021/023178 JP2021023178W WO2022054364A1 WO 2022054364 A1 WO2022054364 A1 WO 2022054364A1 JP 2021023178 W JP2021023178 W JP 2021023178W WO 2022054364 A1 WO2022054364 A1 WO 2022054364A1
Authority
WO
WIPO (PCT)
Prior art keywords
scroll
sliding member
compressor
sliding
fixed scroll
Prior art date
Application number
PCT/JP2021/023178
Other languages
English (en)
Japanese (ja)
Inventor
敏 飯塚
章史 兵藤
貴規 石田
淳 作田
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2022054364A1 publication Critical patent/WO2022054364A1/fr

Links

Images

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
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00

Definitions

  • the present disclosure relates to a sliding member and a compressor and a refrigerating device using the sliding member.
  • the material used for the sliding member is the same kind of material, it is easily seized. Therefore, by using different materials or by surface-treating one side with the same material, a difference in hardness is provided in the sliding portion to prevent seizure.
  • a scroll compressor which is one of the refrigerant compressors
  • the fixed scroll and the swivel scroll which are sliding parts, are composed of iron-based metal and aluminum-based metal, or both are composed of iron-based metal or aluminum-based metal.
  • one of them is treated with a phosphate coating or an anodized coating.
  • Patent Document 1 shows an example of a sliding member for preventing seizure and a compressor using the sliding member.
  • the base material of the fixed scroll and the swivel scroll is made of an aluminum alloy, one of which is made of hard aluminum oxide and the other is made of semi-hard aluminum oxide to protect the base material. , Prevents the sliding parts from seizing.
  • the present disclosure provides a sliding member that prevents the base material, which is a light metal, from being exposed due to sliding, and realizes long-term reliability, and a compressor and a freezing device using the sliding member.
  • the base material of the member sliding with each other is an alloy containing a light metal as a main component, and different metals are formed on the surface of the sliding portion.
  • a hard film having a main composition is provided, and the hardness of each hard film is different.
  • the sliding portion of the base metal which is a light metal
  • a hard film having different hardness mainly composed of different metals It is possible to prevent the material from being exposed and to ensure long-term reliability.
  • the linear expansion rate can be adjusted, and the fitting does not change easily due to the influence of heat, providing a highly efficient compressor and freezing device. can.
  • Patent Document 1 the constituent materials of the fixed scroll and the swivel scroll of the sliding member such as the compressor were made of an aluminum alloy, on the other hand.
  • the film is made of hard aluminum oxide, and the other film is made of semi-hard aluminum oxide.
  • the slidability is poor because the coatings containing the same type of metal as the main component slide with each other, and by any chance the coating is partially damaged and the base material is exposed. If this happens, the aluminum alloys will slide together.
  • Aluminum alloys have a relatively lower melting point than other metals and easily react with active metals, causing adhesive wear, making it difficult to ensure long-term reliability.
  • the present inventors have discovered a problem due to such an event, and have come to construct the subject matter of the present disclosure in order to solve the problem.
  • FIG. 1 is a vertical sectional view of a scroll compressor according to the present embodiment.
  • a compression mechanism unit 10 for compressing the refrigerant and an electric mechanism unit 20 for driving the compression mechanism unit 10 are arranged in the closed container 1.
  • the closed container 1 is composed of a cylindrical body portion 1a extending in the vertical direction, an upper lid 1c that closes the upper opening of the body portion 1a, and a lower lid 1b that closes the lower opening of the body portion 1a. ing.
  • the closed container 1 is provided with a refrigerant suction pipe 2 for introducing a refrigerant into the compression mechanism unit 10, and a refrigerant discharge pipe 3 for discharging the refrigerant compressed by the compression mechanism unit 10 to the outside of the closed container 1. .
  • the compression mechanism unit 10 includes a fixed scroll 11 and a swivel scroll 12, which are shown as one of the sliding members of the present disclosure, and has a rotary shaft 13 that swivels and drives the swivel scroll 12.
  • the electric mechanism unit 20 includes a stator 21 fixed to the closed container 1 and a rotor 22 arranged inside the stator 21.
  • a rotating shaft 13 is fixed to the rotor 22.
  • An eccentric shaft 13a eccentric with respect to the rotating shaft 13 is formed at the upper end of the rotating shaft 13.
  • An oil pool is formed in the eccentric shaft 13a by a recess opened on the upper surface of the eccentric shaft 13a.
  • the fixed scroll 11 includes a disk-shaped fixed scroll end plate 11a, a spiral fixed spiral wrap 11b erected on the fixed scroll end plate 11a, and an outer peripheral wall portion 11c erected so as to surround the fixed spiral wrap 11b.
  • a discharge port 14 is formed at a substantially central portion of the fixed scroll end plate 11a.
  • the swivel scroll 12 has a disk-shaped swivel scroll end plate 12a, a swirl swirl wrap 12b erected on the lap side end surface of the swivel scroll end plate 12a, and a cylindrical boss portion formed on the anti-wrap side end surface of the swirl scroll end plate 12a. It is equipped with 12c.
  • the fixed scroll 11 and the swivel scroll 12 are made of a light metal having a specific gravity of 5 or less, for example, an alloy containing aluminum or magnesium as a main component.
  • the fixed swirl wrap 11b of the fixed scroll 11 and the swirl swirl wrap 12b of the swirl scroll 12 are meshed with each other, and a plurality of compression chambers 15 are formed between the fixed swirl wrap 11b and the swirl swirl wrap 12b.
  • the boss portion 12c is formed substantially in the center of the swivel scroll end plate 12a.
  • the eccentric shaft 13a is inserted into the boss portion 12c, and the boss portion 12c is accommodated in the boss accommodating portion 32.
  • the fixed scroll 11 is fixed to the main bearing 30 at the outer peripheral wall portion 11c by using a plurality of bolts (not shown).
  • the swivel scroll 12 is supported by the fixed scroll 11 via a rotation restraining member 17 such as an old dam ring.
  • the rotation restraining member 17 that restrains the rotation of the turning scroll 12 is provided between the fixed scroll 11 and the main bearing 30. As a result, the turning scroll 12 makes a turning motion with respect to the fixed scroll 11 without rotating.
  • the lower end portion 13b of the rotating shaft 13 is pivotally supported by an auxiliary bearing 18 arranged at the lower part of the closed container 1.
  • An oil storage portion 4 for storing lubricating oil is formed at the bottom of the closed container 1.
  • a positive displacement oil pump 5 is provided at the lower end of the rotating shaft 13.
  • the oil pump 5 is arranged so that the suction port thereof exists in the oil storage unit 4.
  • the oil pump 5 is driven by a rotating shaft 13 and can reliably suck up the lubricating oil in the oil storage unit 4 provided at the bottom of the closed container 1 regardless of the pressure condition or the operating speed, and there is a concern about running out of oil. Is resolved.
  • the rotary shaft 13 is formed with a rotary shaft oil supply hole 13c extending from the lower end portion 13b of the rotary shaft 13 to the eccentric shaft 13a.
  • the lubricating oil sucked up by the oil pump 5 is supplied into the bearing, the bearing portion 31, and the boss portion 12c of the auxiliary bearing 18 through the rotary shaft oil supply hole 13c formed in the rotary shaft 13.
  • the refrigerant sucked from the refrigerant suction pipe 2 is guided to the compression chamber 15 from the suction port 15a.
  • the compression chamber 15 moves from the outer peripheral side toward the central portion while reducing the volume, and the refrigerant that has reached a predetermined pressure in the compression chamber 15 is transferred from the discharge port 14 provided in the central portion of the fixed scroll 11 to the discharge chamber 6. It is discharged.
  • a discharge valve is provided in the discharge port 14.
  • the refrigerant that has reached a predetermined pressure in the compression chamber 15 pushes open the discharge valve and is discharged to the discharge chamber 6.
  • the refrigerant discharged to the discharge chamber 6 is led out to the upper part inside the closed container 1 and is discharged from the refrigerant discharge pipe 3.
  • the swivel scroll 12 is configured to be pressed against the fixed scroll 11 by applying a predetermined intermediate pressure to the swivel scroll end plate 12a. This makes it possible to reduce the leakage loss from the thrust surface.
  • the intermediate pressure is supplied by intermittently communicating the groove provided on the thrust surface of the fixed scroll 11 and the second end plate oil communication passage 63 provided in the swivel scroll end plate 12a. It is possible to control the magnitude of the applied pressure by adjusting the timing of.
  • the tip of the swirl swirl wrap and the tip of the fixed swirl wrap have a shape in which the wrap height gradually decreases from the winding end side 12be and 11be (see FIG. 3) toward the winding start side (center side), and the discharge port.
  • the gap at the tip of the lap near 14 is increased. As a result, it is possible to absorb the elongation due to the thermal expansion of the lap caused by the temperature difference between the suction temperature and the discharge temperature during the operation of the compressor, and it is possible to improve the efficiency of the compressor.
  • the members of the fixed scroll 11 and the swivel scroll 12 are made of a light metal, for example, an alloy containing aluminum or magnesium as a main component
  • the members of the fixed scroll 11 and the swivel scroll 12 are compared with the iron-based material for the purpose of weight reduction and miniaturization. This tendency becomes remarkable because the linear expansion coefficient is high and the Young's modulus is low.
  • light metals such as aluminum alloys and magnesium alloys have a low melting point and easily react with active metals, so that they are more likely to cause adhesive wear.
  • the sliding portions of both the fixed scroll 11 and the swivel scroll 12 made of light metal are shown in FIG.
  • the hard films 41A and 41B are composed of a treatment for increasing the hardness of a light metal such as an anodic oxide film treatment or an electroless Ni-P (nickel-phosphorus) plating film.
  • the materials of the hard films 41A and 41B are not limited to these. Further, it is desirable that the hardness difference between the hard films 41A and 41B is set so that the hardness of the other is 1.2 to 10 times the Vickers hardness of one. This is because when the hardness difference is less than 1.2 times, adhesive wear is likely to occur, and when the hardness difference is more than 10 times, the aggression from the high hardness side to the low hardness side becomes too strong. This is because the film having the lower hardness is more likely to be damaged.
  • the fixed scroll 11 and the swivel scroll 12 slide when the refrigerant is compressed, but both the fixed scroll 11 and the swivel scroll 12 made of light metal slide.
  • the hard films 41A and 41B whose main components are metals that are harder than the base materials of both the fixed scroll 11 and the swivel scroll 12 and whose main composition is different from each other are provided on the moving portion, the hard film 41A is provided. , 41B come into contact with each other and slide.
  • the hard films 41A and 41B are mainly composed of metals having different metals as main components, the hard films are partially damaged due to poor slidability between the films containing the same kind of metal as the main components.
  • the base material constituting the fixed scroll 11 and the swivel scroll 12 is a light metal of the same type having a specific gravity of 5 or less, the weight can be significantly reduced and the linear expansion rate can be adjusted, so that the heat can be increased. It is possible to suppress the change in fitting due to the influence and the decrease in compression efficiency. That is, since the fixed scroll 11 and the swivel scroll 12 made of the same type of metal have the same linear expansion coefficient, the deformation rate of the lap under a certain temperature is the same. Therefore, it is possible to avoid leakage loss and interference between laps due to thermal expansion / contraction as compared with the case of being composed of dissimilar metals, and it is possible to improve the efficiency of the compressor.
  • the refrigerant R32, carbon dioxide, or a refrigerant having a double bond between carbons can be used.
  • the sliding member of the present embodiment is an alloy in which the base material is mainly composed of a light metal having a specific gravity of 5 or less, and is formed on the sliding portion of the sliding member such as the fixed scroll 11 and the swivel scroll 12.
  • the weight of the sliding member can be significantly reduced, and the base material of the light metal is not exposed because it is protected by a hard film whose main component is a metal having different hardness from each other, so that seizure due to sliding is prevented. Long-term reliability can be ensured.
  • the hard film of the present embodiment has a higher hardness than the light metal of the base material. Therefore, the wear resistance is improved, and the long-term reliability of the sliding portion can be more reliably ensured.
  • the hardness difference between the hard films 41A and 41B on the outermost surface of the sliding member of the present embodiment is configured to be within the range of 1.2 times to 10 times in Vickers hardness (Hv).
  • Hv Vickers hardness
  • the sliding member of the present embodiment is composed of an alloy in which the base material is both aluminum or magnesium as a main component.
  • a metal having a particularly high mechanical strength is used among the light metals, and the base metal can be further strengthened to improve the reliability of the sliding member.
  • At least one of the hard films is an anodized film (anodized) or a titanium oxide film.
  • the anodic oxide film or the titanium oxide film forms nanometer-order pores called porous.
  • the effect of the oil pool is improved by the valleys and the pores of the porous surface, which leads to further improvement of the lubrication state.
  • the friction on the sliding surface is reduced, which leads to further reduction of input and improvement of reliability.
  • the sliding member of the present embodiment accommodates the compression mechanism unit 10 for compressing the refrigerant, the electric mechanism unit 20 for driving the compression mechanism unit 10, the compression mechanism unit 10 and the electric mechanism unit 20. It is used for a sliding portion in a refrigerant compressor provided with a closed container 1 having an oil storage portion 4 for storing lubricating oil at the bottom.
  • a compressor can reduce the input of the compressor by reducing the sliding loss of the sliding member and improving the reliability, and can realize high efficiency and improvement of reliability.
  • the compression mechanism portion 10 has a fixed scroll 11, a swivel scroll 12, and a rotating shaft 13 that swivels and drives the swivel scroll 12.
  • a disk-shaped fixed scroll end plate 11a and a fixed swirl wrap 11b erected on the fixed scroll end plate 11a are provided. It may be used as a sliding member in a compressor provided with a swirl swirl lap 12b erected on the lap side end face. According to the above configuration, since the present sliding member can be applied to all sliding parts of the scroll compressor having a relatively large number of sliding surfaces, further weight reduction can be realized and a highly reliable compressor can be provided. If this compressor is mounted to form a freezing device, the efficiency and reliability of the freezing device can be improved.
  • the sliding member of the present embodiment may be used for the fixed scroll 11 and the swivel scroll 12.
  • a compressor called a scroll compressor the compression chamber 15 is divided into a plurality of parts by the lap portion of the fixed scroll 11 and the swivel scroll 12, and the linear expansion rate of the base material of the fixed scroll 11 and the swivel scroll 12 If the values are different, the shapes of the wraps forming the compression chamber 15 will change as the temperature changes, so that the meshing deviation will increase, and the performance may deteriorate due to refrigerant leakage or excessive interference of parts. rice field.
  • the scroll compressor has been described as an example, but the present invention is not limited to the scroll compressor, and may be a reciprocating compressor, a rotary compressor, or the like, or may be a scroll compressor.
  • the specific configuration is not particularly limited, and various known configurations can be preferably used.
  • the refrigerant is exemplified as the operating medium for compression
  • a compressor that compresses an operating medium other than the refrigerant may be used, and the same effect can be obtained by using the compressor not only for the compressor but also for a car engine or the like. ..
  • the sliding member of the present invention and a compressor and a refrigerator using the same are useful for products having a refrigerating cycle device such as a hot water heater, an air conditioner, and a water heater, or a refrigerating cycle device such as a refrigerator.
  • a refrigerating cycle device such as a hot water heater, an air conditioner, and a water heater
  • a refrigerating cycle device such as a refrigerator.

Landscapes

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

Abstract

Le matériau de base d'éléments coulissants tels qu'une volute fixe (11) et une volute tournante (12) qui coulissent l'une contre l'autre est un alliage contenant un métal léger présentant une densité spécifique égale ou inférieure à 5 en tant que composant principal, des films durs (41A), (41B) comprenant principalement des métaux mutuellement différents sont disposés sur les surfaces des parties coulissantes, et les films durs (41A), (41B) présentent une différence de dureté. Grâce à cette configuration, l'exposition du matériau de base pendant le coulissement peut être empêchée pour empêcher une saisie, et une fiabilité à long terme peut être assurée.
PCT/JP2021/023178 2020-09-10 2021-06-18 Éléments coulissants, et compresseur et appareil de réfrigération utilisant lesdits éléments coulissants WO2022054364A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020151765 2020-09-10
JP2020-151765 2020-09-10

Publications (1)

Publication Number Publication Date
WO2022054364A1 true WO2022054364A1 (fr) 2022-03-17

Family

ID=80632243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/023178 WO2022054364A1 (fr) 2020-09-10 2021-06-18 Éléments coulissants, et compresseur et appareil de réfrigération utilisant lesdits éléments coulissants

Country Status (1)

Country Link
WO (1) WO2022054364A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01237376A (ja) * 1988-03-16 1989-09-21 Hitachi Ltd スクロール圧縮機
JPH1193866A (ja) * 1997-09-19 1999-04-06 Hitachi Ltd スクロール圧縮機およびその製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01237376A (ja) * 1988-03-16 1989-09-21 Hitachi Ltd スクロール圧縮機
JPH1193866A (ja) * 1997-09-19 1999-04-06 Hitachi Ltd スクロール圧縮機およびその製造方法

Similar Documents

Publication Publication Date Title
KR101073304B1 (ko) 스크롤 압축기
JP3918814B2 (ja) 流体機械
KR20170029313A (ko) 스크롤 압축기
JP2011027076A (ja) スクロール圧縮機
US11939977B2 (en) Scroll compressor including fixed and orbiting scroll having stepped portions and a surface hardened treatment
JP2006299806A (ja) スクロール圧縮機
JP2003206873A (ja) スクロール圧縮機
WO2022054364A1 (fr) Éléments coulissants, et compresseur et appareil de réfrigération utilisant lesdits éléments coulissants
JP2007224767A (ja) 回転式流体機械
JP5034975B2 (ja) スクロール圧縮機
WO2022181165A1 (fr) Élément coulissant et compresseur et dispositif frigorifique utilisant ledit élément
WO2022054363A1 (fr) Élément coulissant ainsi que compresseur et dispositif de réfrigération utilisant un élément coulissant
JP2005325842A (ja) 流体機械
US20050207926A1 (en) Scroll compressor
JP2005083235A (ja) スクロール圧縮機
US20230204035A1 (en) Compressor
JP2006226210A (ja) スクロール圧縮機
WO2021153099A1 (fr) Compresseur à spirales
JP4452035B2 (ja) スクロール圧縮機
JPH08159061A (ja) 横置き型スクロール流体機械
JP3166503B2 (ja) スクロール流体機械
WO2022054365A1 (fr) Élément coulissant et compresseur et dispositif de réfrigération utilisant ce dernier
JP2021025518A (ja) スクロール圧縮機
JPH073229B2 (ja) スクロ−ル気体圧縮機
JP7308437B2 (ja) スクロール圧縮機

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21866325

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21866325

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP