WO2018123309A1 - Turbocompresseur - Google Patents

Turbocompresseur Download PDF

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Publication number
WO2018123309A1
WO2018123309A1 PCT/JP2017/041031 JP2017041031W WO2018123309A1 WO 2018123309 A1 WO2018123309 A1 WO 2018123309A1 JP 2017041031 W JP2017041031 W JP 2017041031W WO 2018123309 A1 WO2018123309 A1 WO 2018123309A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal chamber
lubricating oil
disposed
retainer
deflector
Prior art date
Application number
PCT/JP2017/041031
Other languages
English (en)
Japanese (ja)
Inventor
和真 原田
Original Assignee
大豊工業株式会社
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 大豊工業株式会社 filed Critical 大豊工業株式会社
Publication of WO2018123309A1 publication Critical patent/WO2018123309A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/14—Lubrication of pumps; Safety measures therefor

Definitions

  • the present invention relates to a turbocharger including a deflector that suppresses leakage of lubricating oil to the compressor impeller side.
  • a rotating shaft of a turbocharger connects a compressor impeller and a turbine impeller.
  • a thrust bearing, a deflector, and a retainer are arranged from the turbine impeller side toward the compressor impeller side.
  • the rotating shaft is supported by a thrust bearing.
  • the rotating shaft passes through the deflector and the retainer.
  • a seal chamber is defined between the retainer and the deflector.
  • the lubricating oil that has flowed into the seal chamber flows downward in the seal chamber due to its own weight. For this reason, lubricating oil tends to accumulate in the lower part of the seal chamber. Therefore, if the negative pressure on the compressor impeller side increases, the accumulated lubricating oil may leak to the compressor impeller side.
  • a vent hole is formed in the deflector of the turbocharger of the same document.
  • the vent hole is arranged on the upper side of the rotating shaft. That is, the portion where the lubricating oil tends to accumulate in the seal chamber (the lower portion of the seal chamber) and the vent hole are spaced apart from each other in the vertical direction with the rotation shaft interposed therebetween.
  • the lubricating oil below the seal chamber leaks to the compressor impeller side through a gap near the outer peripheral surface of the rotating shaft. For this reason, even if the lubricating oil in the lower portion of the seal chamber is sucked up by the negative pressure on the compressor impeller side, it is difficult to discharge the lubricating oil through the vent hole.
  • an object of the present invention is to provide a turbocharger capable of suppressing leakage of lubricating oil to the compressor impeller side.
  • a turbocharger includes a rotating shaft that connects a compressor impeller and a turbine impeller, a retainer disposed between the compressor impeller and the turbine impeller, and the turbine impeller of the retainer.
  • a deflector body having a through-hole through which the rotating shaft is inserted, a tongue extending from a lower edge of the deflector body, and a partition between the retainer and the deflector
  • a turbocharger that is partitioned between the sealing chamber and the tongue and the retainer, and that discharges lubricating oil from the sealing chamber, wherein the deflector body is vertically Seen from a direction orthogonal to the above, it is disposed between the through hole and the discharge port, the seal chamber, and the seal chamber And having a Bin'inpera side space, a leak hole for communicating the.
  • the leak hole is arrange
  • the leak hole is disposed below the through hole, that is, the rotating shaft.
  • the leak hole is arrange
  • FIG. 1 is an axial sectional view of a turbocharger according to an embodiment of the present invention.
  • FIG. 2 is an enlarged view in the frame II of FIG.
  • FIG. 3 is a rear view of the seal portion of the turbocharger.
  • FIG. 4A is an axial cross-sectional view of the vicinity of a tongue portion of a deflector of a turbocharger according to another embodiment (part 1).
  • FIG.4 (b) is an axial sectional view of the vicinity of the tongue portion of the deflector of the turbocharger of the other embodiment (part 2).
  • FIG. 1 shows an axial sectional view of the turbocharger of the present embodiment.
  • the turbocharger 1 of the present embodiment includes a journal bearing 3, a thrust bearing 4, a rotating part 5, a seal part 6, a bearing housing 90, a compressor housing 91, and a turbine housing 92. It is equipped with.
  • oil passages 901a and 901b, bearing housing portions 902a and 902b, and a retainer housing portion 903 are formed in the bearing housing 90.
  • the oil passage 901b is included in the concept of “a space on the turbine impeller side of the seal chamber” of the present invention.
  • Lubricating oil flows through the oil passages 901a and 901b.
  • the bearing housing portion 902 a is disposed at the radial center of the bearing housing 90.
  • the retainer accommodating portion 903 is recessed in the front surface of the bearing housing 90.
  • the bearing housing portion 902b is connected to the rear side of the retainer housing portion 903.
  • the journal bearing 3 has a cylindrical shape.
  • the journal bearing 3 is accommodated in the bearing accommodating portion 902a.
  • the thrust bearing 4 has a disk shape with the lower portion removed.
  • the thrust bearing 4 is accommodated in the bearing accommodating portion 902b.
  • the compressor housing 91 is disposed on the front side of the bearing housing 90.
  • the turbine housing 92 is disposed on the rear side of the bearing housing 90.
  • the rotating part 5 is rotatable with respect to the bearing housing 90.
  • the rotating unit 5 includes a rotating shaft 50, a compressor impeller 51, a turbine impeller 52, a thrust collar 53, and a color turbo seal ring 54.
  • the rotating shaft 50 penetrates the bearing housing 90 in the front-rear direction (axial direction).
  • the rotating shaft 50 is rotatably supported by the journal bearing 3 from the radially outer side.
  • the compressor impeller 51 is attached to the front end of the rotating shaft 50.
  • the turbine impeller 52 is connected to the rear end of the rotary shaft 50. That is, the rotating shaft 50 connects the compressor impeller 51 and the turbine impeller 52.
  • the thrust collar 53 is attached to the outer peripheral surface of the rotating shaft 50.
  • the thrust collar 53 is rotatably supported by the thrust bearing 4 from the axial direction.
  • the color turbo seal ring 54 is disposed on the front side of the thrust collar 53.
  • the color turbo seal ring 54 is attached to the outer peripheral surface of the rotating shaft 50.
  • FIG. 2 shows an enlarged view in the frame II of FIG.
  • FIG. 3 shows a rear view of the seal portion of the turbocharger of the present embodiment.
  • the seal portion 6 includes a retainer 60 and a deflector 61.
  • the retainer 60 is disposed in the retainer accommodating portion 903 of the bearing housing 90.
  • the retainer 60 has a bottomed cylindrical shape that opens to the rear side.
  • the retainer 60 includes a bottom wall portion 600 and a peripheral wall portion 601.
  • An O-ring 601a is disposed between the peripheral wall portion 601 and the retainer accommodating portion 903.
  • a boss portion 600 a is disposed at the radial center of the bottom wall portion 600.
  • a color turbo seal ring 54 is rotatably disposed inside the boss portion 600a in the radial direction.
  • a gap H is defined between the boss portion 600 a and the color turbo seal ring 54.
  • a ring seal 600b is disposed in the gap H.
  • the ring seal 600b is in pressure contact with the inner peripheral surface of the boss portion 600a.
  • a seal chamber A is defined between the retainer 60 and a deflector 61 described later. In the lower part of the seal chamber A, a staying part C exists. Lubricating oil O tends to accumulate in the staying part C.
  • the deflector 61 includes a deflector body 610 and a tongue 611.
  • the deflector body 610 covers the seal chamber A from the rear side.
  • the outer peripheral edge of the deflector body 610 is fitted to the rear edge of the peripheral wall portion 601 from the radially inner side.
  • the deflector body 610 includes a through hole 610a, a leak hole 610b, a guard rib 610c, and a step portion 610d.
  • the through hole 610a is opened at the center of the deflector body 610 in the radial direction.
  • a color turbo seal ring 54 is rotatably disposed inside the through hole 610a in the radial direction.
  • the leak hole 610b When viewed from the left-right direction (right side or left side), the leak hole 610b is disposed between the upper through hole 610a, the lower discharge port B, and the retention portion C. The leak hole 610b communicates the seal chamber A and the oil passage 901b.
  • the guard rib 610c When viewed from the left-right direction, the guard rib 610c is disposed between the upper through hole 610a and the lower discharge port B and staying portion C. The guard rib 610c protrudes from the upper edge of the leak hole 610b to the front side (the seal chamber A side). The guard rib 610c extends in the left-right direction (a direction orthogonal to the direction in which the lower discharge port B and the upper gap H are communicated).
  • the step portion 610d When viewed from the left-right direction, the step portion 610d is disposed between the upper through-hole 610a and the lower discharge port B and staying portion C.
  • the lower end of the step portion 610d is disposed on the front side with respect to the upper end of the step portion 610d. For this reason, the step part 610d extends from the rear upper side to the front lower side.
  • the leak hole 610b is formed in the step 610d.
  • the upper edge of the leak hole 610b coincides with the upper edge of the step portion 610d.
  • the tongue portion 611 extends from the lower edge of the deflector body 610 to the rear lower side (oil passage 901b side). That is, the tongue 611 extends from the front upper side to the rear lower side.
  • a discharge port B is defined between the tongue 611 and the lower part of the rear edge of the peripheral wall 601.
  • the discharge port B is disposed on the rear side (oil path 901b side) of the staying part C.
  • the seal chamber A and the oil passage 901b communicate with each other through the discharge port B.
  • a part of the used lubricating oil passes through a gap between the deflector 61 and the retainer 60, a gap between the through hole 610a and the collar turbo seal ring 54, a discharge port B, and the like. , Flows into the seal chamber A.
  • the lubricating oil O that has flowed into the seal chamber A joins the lower portion of the seal chamber A due to its own weight. That is, the lubricating oil O stays in the staying part C.
  • the lubricating oil O in the staying part C flows out to the oil passage 901b through the discharge port B.
  • the deflector body 610 has a leak hole 610b. Therefore, as indicated by the arrow Y1 in FIG. 2, the lubricating oil O sucked up from the staying portion C can be discharged to the oil passage 901b through the leak hole 610b. Further, as indicated by an arrow Y2 in FIG. 2, air can be introduced from the oil passage 901b to the seal chamber A through the leak hole 610b. In addition, a guard rib 610 c is disposed on the deflector body 610. For this reason, as shown by the arrow Y3 in FIG. 2, the lubricating oil O sucked up from the stay part C can collide with the guard rib 610c.
  • the deflector body 610 is provided with a step portion 610d. For this reason, as indicated by an arrow Y4 in FIG. 2, the lubricating oil O flowing down the rear surface (surface) of the deflector body 610 can be prevented from flowing into the seal chamber A via the leak hole 610b.
  • a leak hole 610 b is disposed in the deflector 61.
  • the leak hole 610b is disposed below the through-hole 610a, that is, the rotation shaft 50. Further, the leak hole 610b is disposed above the discharge port B, that is, the staying portion C as viewed from the left-right direction. For this reason, even if the lubricating oil O in the staying portion C is sucked up by the negative pressure on the compressor impeller 51 side, the lubricating oil O is discharged through the leak hole 610b as shown by the arrow Y1 in FIG. Can do.
  • a guard rib 610 c is disposed on the deflector body 610.
  • the guard rib 610c is disposed below the through-hole 610a, that is, the rotation shaft 50 as viewed from the left-right direction.
  • the guard rib 610c is disposed above the discharge port B, that is, the staying portion C as viewed from the left-right direction. Therefore, as indicated by an arrow Y3 in FIG. 2, when the lubricating oil O in the staying portion C is sucked by the negative pressure on the compressor impeller 51 side, the suction of the lubricating oil O can be obstructed by the guard rib 610c. .
  • the deflector body 610 is provided with a step 610d.
  • the lower end of the step portion 610d is disposed on the front side with respect to the upper end of the step portion 610d. That is, in the deflector body 610, the portion below the step portion 610d is shifted to the front side with respect to the portion above the step portion 610d.
  • the upper edge of the leak hole 610b is arranged at a position (the same position as the upper edge or a position lower than the upper edge) below the upper edge of the step portion 610d. For this reason, as indicated by an arrow Y4 in FIG. 2, the lubricating oil O flowing down the rear surface of the deflector body 610 can be suppressed from flowing into the seal chamber A via the leak hole 610b.
  • the lower surface of the guard rib 610c (the collision surface on which the sucked lubricating oil O collides) is not directly below, but is directed to the rear lower side (leak hole 610b side). For this reason, it is easy to introduce the lubricating oil O reflected by the guard rib 610c into the leak hole 610b.
  • FIG. 4A shows an axial sectional view of the vicinity of the tongue portion of the deflector of the turbocharger of the other embodiment (part 1).
  • FIG. 4B is an axial sectional view of the vicinity of the tongue portion of the deflector of the turbocharger according to another embodiment (part 2).
  • part shown to Fig.4 (a) and FIG.4 (b) is a site
  • the guard rib 610c may protrude from the lower edge of the leak hole 610b to the front side (the seal chamber A side). In this way, the lubricating oil O reflected by the guard rib 610c can be returned to the staying part C as indicated by the arrow Y5.
  • the guard rib 610c may be disposed above the step portion 610d. Further, the leak hole 610b may be disposed below the step portion 610d. That is, the leak hole 610b, the guard rib 610c, and the step portion 610d may be arranged independently of each other. In this way, as indicated by the arrow Y6, a part of the lubricating oil O reflected by the guard rib 610c can be returned to the staying part C. Further, the remaining portion of the lubricating oil O reflected by the guard rib 610c can flow out to the oil passage 901b through the leak hole 610b.
  • the shape, size, position, and number of arrangement of the leak hole 610b, the guard rib 610c, and the step portion 610d are not particularly limited.
  • the leak hole 610b may have a slit shape, a square shape, an oval shape, a perfect circle shape, or the like when viewed from the front side or the rear side.
  • the guard rib 610c may have a linear shape extending in the left-right direction or a partial arc shape (C-shape) projecting upward as viewed from the front side or the rear side.
  • the lateral length of the guard rib 610c may be greater than or equal to the lateral length of the upper edge of the leak hole 610b. In this way, it is easy to introduce the lubricating oil O reflected by the guard rib 610c into the leak hole 610b.
  • the left-right length of the guard rib 610c may be equal to or longer than the left-right length of the lower edge of the leak hole 610b. .
  • the protrusion angle ⁇ 1 of the guard rib 610c with respect to the upper portion of the step portion 610d is not particularly limited. It may be obtuse or acute.
  • the rear surface of the step portion 610d may be flat or curved.
  • the protrusion angle ⁇ 2 of the step portion 610d with respect to the upper portion of the step portion 610d is not particularly limited. It may be obtuse or acute.
  • the guard rib 610c may be manufactured. Further, the guard rib 610c may be disposed on the rear surface (the surface on the seal chamber A side) of the bottom wall portion 600.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

La présente invention concerne un turbocompresseur dans lequel il est possible de réduire au minimum les fuites d'huile lubrifiante vers une roue de compresseur. Un turbocompresseur (1) comprend : un arbre rotatif (50) reliant une roue de compresseur (51) et une roue de turbine (52) ; un élément de retenue (60) disposé entre la roue de compresseur (51) et la roue de turbine (52) ; un déflecteur (61) présentant un corps principal de déflecteur (610) qui est agencé en parallèle avec le côté de roue de turbine (52) du dispositif de retenue (60) et qui a un trou traversant (610a) à travers lequel l'arbre rotatif (50) est inséré, et une partie languette (611) qui s'étend à partir du bord inférieur du corps principal de déflecteur (610) ; une chambre d'étanchéité (A) sectionnée entre le dispositif de retenue (60) et le déflecteur (61) ; et un orifice d'évacuation (B) qui est sectionné entre la partie languette (611) et le dispositif de retenue (60) et qui évacue l'huile lubrifiante de la chambre d'étanchéité (A). Le corps principal de déflecteur (610), qui est disposé entre le trou traversant (610a) et l'orifice d'évacuation (B), présente un trou de fuite (610b) à travers lequel la chambre d'étanchéité (A) et un espace (901b) sur le côté de la roue de turbine (52) de la chambre d'étanchéité (A) communiquent.
PCT/JP2017/041031 2016-12-27 2017-11-15 Turbocompresseur WO2018123309A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-253039 2016-12-27
JP2016253039A JP2018105247A (ja) 2016-12-27 2016-12-27 ターボチャージャ

Publications (1)

Publication Number Publication Date
WO2018123309A1 true WO2018123309A1 (fr) 2018-07-05

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ID=62707267

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/041031 WO2018123309A1 (fr) 2016-12-27 2017-11-15 Turbocompresseur

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JP (1) JP2018105247A (fr)
WO (1) WO2018123309A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146537U (ja) * 1983-03-22 1984-09-29 トヨタ自動車株式会社 タ−ボチヤ−ジヤのオイル洩れ止め装置
JPH03121275U (fr) * 1990-03-27 1991-12-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146537U (ja) * 1983-03-22 1984-09-29 トヨタ自動車株式会社 タ−ボチヤ−ジヤのオイル洩れ止め装置
JPH03121275U (fr) * 1990-03-27 1991-12-12

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JP2018105247A (ja) 2018-07-05

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