US20190353160A1 - Scroll compressor - Google Patents

Scroll compressor Download PDF

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Publication number
US20190353160A1
US20190353160A1 US16/477,009 US201816477009A US2019353160A1 US 20190353160 A1 US20190353160 A1 US 20190353160A1 US 201816477009 A US201816477009 A US 201816477009A US 2019353160 A1 US2019353160 A1 US 2019353160A1
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United States
Prior art keywords
driving
scroll
seal
bearing
housing
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.)
Abandoned
Application number
US16/477,009
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English (en)
Inventor
Hirofumi Hirata
Takahide Ito
Takuma YAMASHITA
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIRATA, HIROFUMI, ITO, TAKAHIDE, YAMASHITA, Takuma
Publication of US20190353160A1 publication Critical patent/US20190353160A1/en
Abandoned legal-status Critical Current

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    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F04C18/023—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 where both members are moving
    • F04C18/0238—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 where both members are moving with symmetrical double wraps
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/02—Rotary-piston machines or pumps 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
    • F04C2/04—Rotary-piston machines or pumps 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 of internal axis type
    • F04C2/045—Rotary-piston machines or pumps 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 of internal axis type having a C-shaped piston
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088—Lubrication
    • 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
    • F04C18/023—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 where both members are moving
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C27/009—Shaft sealings specially adapted for pumps
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • 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
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
    • 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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof

Definitions

  • the present disclosure relates to a scroll compressor suitably used for, for example, a double rotating scroll compressor.
  • a double rotating scroll compressor has been well-known (refer to PTL 1).
  • Such a double rotating scroll compressor includes a seal plate on a front end surface of a discharge cylinder.
  • the seal plate seals high-pressure side occupied by compressed working fluid and low-pressure side that is an internal space of a housing.
  • a seal plate 48 sandwiched between a front end surface of a discharge cylinder 46 and a boss portion 50 is compressed in an axis direction to achieve sealing (reference numerals are those described in PTL 1).
  • sealability may be deteriorated.
  • the present disclosure is made in consideration of such circumstances, and an object of the present disclosure is to provide a scroll compressor that makes it possible to reduce the axial dimension of the discharge cylinder rotated around the axis while supplying a lubricant when the outer peripheral surface of the discharge cylinder is sealed.
  • the scroll compressor according to the present disclosure includes paired scroll members that include a compression chamber to compress working fluid, a housing that houses the paired scroll members, a discharge cylinder that discharges the compressed working fluid from the compression chamber and is rotated around an axis with respect to the housing, a bearing that rotatably supports the discharge cylinder with respect to the housing, and a seal member that is provided on outlet side of the discharge cylinder relative to the bearing and seals an outer peripheral surface of the discharge cylinder.
  • a lubricant is enclosed in a space formed between the bearing and the seal member.
  • the space is formed between the seal member and the bearing that rotatably supports the discharge cylinder, and the lubricant is enclosed in the space.
  • the scroll compressor according to the present disclosure can reduce wear of the seal member.
  • the bearing may be a rolling bearing including a seal plate on a side surface on side opposite to the seal member side, and may not include a seal plate on a side surface on the seal member side.
  • the side surface of the bearing on the seal member side faces the space in which high-pressure working fluid is sufficiently sealed by the seal member and in which the lubricant is enclosed. This allows for omission of the seal plate on the seal member side.
  • a side surface of the bearing on the side opposite to the seal member faces an inside of the housing. Therefore, the seal plate is disposed to prevent leakage of the lubricant.
  • the seal member may be an oil seal.
  • the lubricant is provided between the oil seal and the bearing, which makes it possible to reduce wear of the oil seal.
  • the scroll compressor according to the present disclosure may further include a driving shaft that is rotationally driven by a driving unit, and the scroll compressor may be configured as a double rotating scroll compressor that includes a driving-side scroll member and a driven-side scroll member as the paired scroll members.
  • the driving-side scroll member is coupled to the driving shaft and performs rotational movement, and the driven-side scroll member receives power transmitted from the driving-side scroll member to perform rotational movement.
  • FIG. 1 is a vertical cross-sectional view illustrating a double rotating scroll compressor according to an embodiment of the present disclosure.
  • FIG. 2 is a vertical cross-sectional view illustrating a main part of FIG. 1 in an enlarged manner.
  • FIG. 3 is a vertical cross-sectional view illustrating a modification 1.
  • FIG. 4 is a vertical cross-sectional view illustrating a modification 2.
  • FIG. 5 is a plan view illustrating a driving-side scroll member.
  • FIG. 1 and FIG. 2 An embodiment of the present disclosure is described below with reference to FIG. 1 and FIG. 2 .
  • FIG. 1 illustrates a double rotating scroll compressor (scroll compressor) 1 .
  • the double rotating scroll compressor 1 can be used as, for example, a supercharger that compresses combustion air (fluid) to be supplied to an internal combustion engine such as a vehicle engine.
  • the double rotating scroll compressor 1 includes a housing 3 , a motor (driving unit) 5 accommodated on one end side in the housing 3 , and a driving-side scroll member 70 and a driven-side scroll member 90 that are accommodated on the other end side in the housing 3 .
  • the housing 3 has a substantially cylindrical shape, and includes a motor accommodation portion (first housing) 3 a that accommodates the motor 5 , and a scroll accommodation portion (second housing) 3 b that accommodates the scroll members 70 and 90 .
  • a cooling fin 3 c to cool the motor 5 is provided on an outer periphery of the motor accommodation portion 3 a.
  • a discharge opening 3 d from which compressed air (working fluid) is discharged is provided at an end part of the scroll accommodation portion 3 b. Note that, although not illustrated in FIG. 1 , the housing 3 includes an air suction opening from which air (working fluid) is sucked in.
  • the scroll accommodation portion 3 b of the housing 3 is divided at a division surface P that is located at a substantially center in an axis direction of the scroll members 70 and 90 .
  • the housing 3 includes a flange portion (not illustrated) that protrudes outward at a predetermined position in a circumferential direction. A bolt or the like as a fastening means is inserted into and fixed to the flange portion, which results in fastening at the division surface P.
  • the motor 5 is driven by being supplied with power from an unillustrated power supply source. Rotation of the motor 5 is controlled by an instruction from an unillustrated control unit.
  • a stator 5 a of the motor 5 is fixed to an inner periphery of the housing 3 .
  • a rotor 5 b of the motor 5 rotates around a driving-side rotation axis CL 1 .
  • a driving shaft 6 that extends on the driving-side rotation axis CL 1 is connected to the rotor 5 b.
  • the driving shaft 6 is connected to a first driving-side shaft portion 7 c of the driving-side scroll member 70 .
  • the driving-side scroll member 70 includes a first driving-side scroll portion 71 on the motor 5 side, and a second driving-side scroll portion 72 on the discharge opening 3 d side.
  • the first driving-side scroll portion 71 includes a first driving-side end plate 71 a and first driving-side walls 71 b.
  • the first driving-side end plate 71 a is connected to the first driving-side shaft portion 7 c connected to the driving shaft 6 , and extends in a direction orthogonal to the driving-side rotation axis CL 1 .
  • the first driving-side shaft portion 7 c is provided so as to be rotatable with respect to the housing 3 through a first driving-side bearing 11 that is a ball bearing.
  • the first driving-side end plate 71 a has a substantially disc shape in a planar view.
  • the first driving-side wall 71 b formed in a spiral shape is provided on the first driving-side end plate 71 a.
  • the three lines of first driving-side walls 71 b are disposed at an equal interval around the driving-side rotation axis CL 1 (see FIG. 5 ).
  • the second driving-side scroll portion 72 includes a second driving-side end plate 72 a and second driving-side walls 72 b.
  • the second driving-side walls 72 b are each formed in a spiral shape as with the above-described first driving-side walls 71 b.
  • a second driving-side shaft portion (discharge cylinder) 72 c that extends in the driving-side rotation axis CL 1 and has a cylindrical shape is connected to the second driving-side end plate 72 a.
  • the second driving-side shaft portion 72 c is provided so as to be rotatable with respect to the housing 3 through a second driving-side bearing 14 that is a ball bearing.
  • the second driving-side end plate 72 a includes a discharge port 72 d extending along the driving-side rotation axis CL 1 .
  • a seal member 16 is provided on downstream side of the second driving-side bearing 14 in a discharge direction of the compressed air, namely, on front end side that is a free end of the second driving-side shaft portion 72 c, between the second driving-side shaft portion 72 c and the housing 3 .
  • the seal member 16 and the second driving-side bearing 14 are disposed at a predetermined interval in the driving-side rotation axis CL 1 direction, and a space R is provided therebetween.
  • a lubricant 17 that is grease as, for example, semi-solid lubricant is enclosed in the space R.
  • the first driving-side scroll portion 71 and the second driving-side scroll portion 72 are fixed while front ends (free ends) of the walls 71 b and 72 b corresponding to each other face each other.
  • the first driving-side scroll portion 71 and the second driving-side scroll portion 72 are fixed by bolts (wall fixing parts) 31 that are fastened to respective flange portions 73 provided at a plurality of positions in the circumferential direction.
  • the flange portions 73 are provided so as to protrude outward in a radial direction.
  • the driven-side scroll member 90 includes a first driven-side scroll portion 91 and a second driven-side scroll portion 92 .
  • Driven-side end plates 91 a and 92 a are located at a substantially center of the driven-side scroll member 90 in the axis direction (horizontal direction in figure).
  • the driven-side end plates 91 a and 92 a are fixed while rear surfaces (other side surfaces) of the respective driven-side end plates 91 a and 92 a are superimposed and in contact with each other.
  • the fixing is performed by a bolt, a pin, etc.
  • the through hole 90 h is provided at a center of each of the driven-side end plates 91 a and 92 a, and causes the compressed air to flow toward the discharge port 72 d.
  • the first driven-side walls 91 b are provided on one side surface of the first driven-side end plate 91 a, and the second driven-side walls 92 b are provided on one side surface of the second driven-side end plate 92 a.
  • the first driven-side walls 91 b provided on the motor 5 side from the first driven-side end plate 91 a engage with the first driving-side walls 71 b of the first driving-side scroll portion 71 .
  • the second driven-side walls 92 b provided on the discharge opening 3 d side from the second driven-side end plate 92 a engage with the second driving-side walls 72 b of the second driving-side scroll portion 72 .
  • the support members 33 and 35 described later are fixed to the outer peripheries of the first driven-side walls 91 b.
  • the second driven-side walls 92 b also have the similar configuration.
  • the first support member 33 and the second support member 35 are provided at the respective ends of the driven-side scroll member 90 in the axis direction (horizontal direction in figure).
  • the first support member 33 is disposed on the motor 5 side, and the second support member 35 is disposed on the discharge opening 3 d side.
  • the first support member 33 is fixed to the front ends (free ends) of the first driven-side walls 91 b, and the second support member 35 is fixed to the front ends (free ends) of the second driven-side walls 92 b.
  • the shaft portion 33 a is provided on the center axis side of the first support member 33 , and the shaft portion 33 a is fixed to the housing 3 through the first support member bearing 37 .
  • the shaft portion 35 a is provided on the center axis side of the second support member 35 , and the shaft portion 35 a is fixed to the housing 3 through the second support member bearing 38 .
  • the driven-side scroll member 90 rotates around the driven-side rotation axis CL 2 through the support members 33 and 35 .
  • the pin-ring mechanism (synchronous driving mechanism) 15 is provided between the first support member 33 and the first driving-side end plate 71 a. More specifically, a circular hole is provided in the first driving-side end plate 71 a, and the pin member 15 b is provided on the first support member 33 .
  • the pin-ring mechanism 15 transmits the driving force from the driving-side scroll member 70 to the driven-side scroll member 90 , and causes the scroll members 70 and 90 to perform rotational movement in the same direction at the same angular velocity.
  • the scroll accommodation portion 3 b includes a second driving-side shaft portion accommodation portion 3 b 1 that accommodates the second driving-side shaft portion 72 c, and the second driving-side bearing 14 is provided between an outer peripheral surface X of the second driving-side shaft portion 72 c and an inner peripheral surface Y of the second driving-side shaft portion accommodation portion 3 b 1 .
  • the seal member 16 is an oil seal, and a position of the seal member 16 in the axis direction is regulated by a stopper ring 19 that is fitted in the inner peripheral surface Y of the second driving-side shaft portion accommodation portion 3 b 1 as illustrated in FIG. 2 .
  • the seal member 16 includes a seal lip portion 16 a made of a resin.
  • the seal lip portion 16 a includes a lip front end part 16 a 1 that protrudes to the inner peripheral side and comes into contact with the outer peripheral surface X of the second driving-side shaft portion 72 c.
  • An annular spring 16 a 2 is provided on rear-surface side (outer peripheral side) of the seal lip portion 16 a.
  • the lip front end part 16 a 1 is pressed against the entire circumference of the outer peripheral surface X of the second driving-side shaft portion 72 c by elastic force of the spring 16 a 2 .
  • the lubricant 17 is enclosed in the space R surrounded by a surface of the seal member 16 and a surface of the second driving-side bearing 14 facing each other, namely, a side surface Z of the seal member 16 and a surface W 1 of the second driving-side bearing 14 , the outer peripheral surface X of the second driving-side shaft portion 72 c, and the inner peripheral surface Y of the second driving-side shaft portion accommodation portion 3 b 1 .
  • the double rotating scroll compressor 1 including the above-described configuration operates in the following manner.
  • the driving shaft 6 rotates around the driving-side rotation axis CL 1 by the motor 5
  • the first driving-side shaft portion 7 c connected to the driving shaft 6 also rotates, and the driving-side scroll member 70 accordingly rotates around the driving-side rotation axis CL 1 .
  • the driving-side scroll member 70 rotates, the driving force is transmitted from the support members 33 and 35 to the driven-side scroll member 90 through the pin-ring mechanisms 15 , and the driven-side scroll member 90 rotates around the driven-side rotation axis CL 2 .
  • the pin member 15 b of the pin-ring mechanism 15 moves while being in contact with the inner peripheral surface of the circular hole, the both scroll members 70 and 90 perform rotational movement in the same direction at the same angular velocity.
  • the air sucked through the air suction opening of the housing 3 is sucked in from outer peripheral side of each of the scroll members 70 and 90 , and is taken into the compression chambers formed by the scroll members 70 and 90 . Further, compression is separately performed in the compression chambers formed by the first driving-side walls 71 b and the first driven-side walls 91 b and in the compression chambers formed by the second driving-side walls 72 b and the second driven-side walls 92 b. A volume of each of the compression chambers is reduced as each of the compression chambers moves toward the center, which compresses the air.
  • the air compressed by the first driving-side walls 71 b and the first driven-side walls 91 b passes through the through holes 90 h provided in the driven-side end plates 91 a and 92 a, and is joined with the air compressed by the second driving-side walls 72 b and the second driven-side walls 92 b.
  • the resultant air passes through the discharge port 72 d and is discharged to outside from the discharge opening 3 d of the housing 3 .
  • the discharged compressed air is guided to an unillustrated internal combustion engine, and is used as combustion air.
  • a high-pressure space HP occupied by the compressed air that has been discharged from the discharge port 72 d but before being discharged to the outside from the discharge opening 3 d and a low-pressure space LP occupied by sucked air that is sucked from the suction opening of the housing 3 and is taken in from the outer peripheral side of the both scroll members 70 and 90 are partitioned by the seal member 16 , the lubricant 17 , and the second driving-side bearing 14 .
  • the lip front end part 16 a 1 that is a front end of the seal lip portion 16 a of the seal member 16 is pressed against the outer peripheral surface X of the second driving-side shaft portion 72 c by the spring 16 a 2 provided on the seal lip portion 16 a, and an oil film is formed by the lubricant 17 between the lip front end part 16 a 1 and the outer peripheral surface X of the second driving-side shaft portion 72 c.
  • the present embodiment achieves the following action effects.
  • the space R is formed between the seal member 16 and the second driving-side bearing 14 that rotatably supports the second driving-side shaft portion 72 c, and the lubricant 17 is enclosed in the space R. Therefore, it is possible to configure the space in which the lubricant 17 is enclosed, without waste. For example, as compared with a configuration in which two seal members are disposed side by side in the axis direction and the lubricant is enclosed in a space between the seal members, it is possible to reduce the number of components and to reduce an axial dimension of the second driving-side shaft portion 72 c. Accordingly, the outer peripheral surface X of the second driving-side shaft portion 72 c can be sealed in compact, which makes it possible to reduce pressure loss of the compressed air.
  • lubrication of the seal member 16 is achieved by the lubricant 17 enclosed between the seal member 16 and the second driving-side bearing 14 , which allows for reduction of wear.
  • the scroll compressor 1 can reduce wear of the seal member.
  • the present embodiment may be modified in the following manner.
  • a sealed ball bearing may be used as the second driving-side bearing 14 .
  • a second driving-side bearing 14 ′ includes seal plates 14 d and 14 e on respective side surfaces. The seal plates 14 d and 14 e prevent leakage of the lubricant oil inside the second driving-side bearing 14 ′.
  • Each of the seal plates 14 d and 14 e is formed in an annular plate shape, and a seal plate in which a steel plate is coated with rubber is suitably used for each of the seal plates 14 d and 14 e.
  • each of the seal plates 14 d and 14 e is fixed to an outer ring 14 b of the second driving-side bearing 14 ′, and an inner periphery of each of the seal plates 14 d and 14 e is separated from an inner ring 14 a so as not to come into contact with the inner ring 14 a.
  • a non-contact configuration in which the seal plates 14 d and 14 e do not come into contact with the inner ring 14 a makes it possible to prevent energy loss due to generation of heat and the like due to the contact, thereby preventing deterioration of system efficiency of the scroll compressor 1 .
  • a second driving-side bearing 14 ′′ may include only the seal plate 14 d on side W 2 opposite to the seal member 16 without the seal plate 14 e on the seal member side W 1 illustrated in FIG. 3 .
  • a side surface of the bearing 14 ′′ on the seal member side W 1 faces the space R in which the high-pressure air of the high-pressure space HP is sufficiently sealed by the seal member 16 and in which the lubricant 17 is enclosed. This allows for omission of the seal plate on the seal member side W 1 .
  • a side surface of the bearing 14 ′′ on the side W 2 opposite to the seal member 16 faces the inside of the housing 3 . Therefore, the seal plate 14 d is disposed to prevent leakage of the lubricant.
  • the oil seal is used as the seal member 16 ; however, the oil seal may be replaced with a self-seal packing such as a gasket, a mechanical seal, a piston ring, and an O-ring.
  • the lubricant 17 can reduce wear at a contact portion between the seal member 16 that is a self-seal packing such as a gasket, a mechanical seal, a piston ring, and an O-ring and the outer peripheral surface X of the second driving-side shaft portion 72 c.
  • lubricant oil that is fluid lubricant and is represented by mineral oil may be used.
  • the above-described scroll compressor 1 may be an “oilless” or “oil-free” compressor in which the compressed air that has been compressed in the compression chamber formed by the scroll members 7 and 9 contains no lubricant oil, and the compressed air is discharged to the outside from the discharge opening 3 d through the discharge port 72 d.
  • the seal member 16 may be worn down because no lubricant oil is contained in the housing 3 including the high-pressure space HP and the low-pressure space LP; however, providing the lubricant 17 to the space between the seal member 16 and the second driving-side bearing 14 makes it possible to achieve lubrication of the seal member 16 and to reduce wear of the seal member 16 .
  • the double rotating scroll compressor is used as the supercharger; however, the present disclosure is not limited thereto.
  • the double rotating scroll compressor is widely used to compress fluid, and for example, can be used as a refrigerant compressor used in air conditioner.
  • the scroll compressor 1 according to the present disclosure is applicable to an air brake device using air force, as a brake system for a railway vehicle.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
US16/477,009 2017-01-27 2018-01-25 Scroll compressor Abandoned US20190353160A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017013326A JP2018119522A (ja) 2017-01-27 2017-01-27 スクロール型圧縮機
JP2017-013326 2017-06-21
PCT/JP2018/002175 WO2018139500A1 (ja) 2017-01-27 2018-01-25 スクロール型圧縮機

Publications (1)

Publication Number Publication Date
US20190353160A1 true US20190353160A1 (en) 2019-11-21

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US16/477,009 Abandoned US20190353160A1 (en) 2017-01-27 2018-01-25 Scroll compressor

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US (1) US20190353160A1 (ja)
EP (1) EP3561303B1 (ja)
JP (1) JP2018119522A (ja)
CN (1) CN110226040A (ja)
WO (1) WO2018139500A1 (ja)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020117373A1 (de) 2020-07-01 2022-01-05 Hanon Systems Spiralverdichter zur Verdichtung eines Kältemittels und Verfahren zur Ölanreicherung und -verteilung

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62206282A (ja) * 1986-03-07 1987-09-10 Mitsubishi Electric Corp スクロ−ル圧縮機
CH675896A5 (ja) * 1988-07-20 1990-11-15 Aginfor Ag
JPH08254213A (ja) * 1995-03-17 1996-10-01 Koyo Seiko Co Ltd ウォ−タポンプ用軸受の密封装置
JP2003202018A (ja) * 2001-10-22 2003-07-18 Nsk Ltd 転がり軸受装置
JP4471079B2 (ja) * 2003-11-19 2010-06-02 Ｎｏｋ株式会社 密封装置
JP4556183B2 (ja) * 2005-07-12 2010-10-06 有限会社スクロール技研 スクロール流体機械
JP5197157B2 (ja) * 2008-05-27 2013-05-15 株式会社神戸製鋼所 スクリュ流体機械
JP2012207757A (ja) * 2011-03-30 2012-10-25 Keihin Corp 圧縮機
JP5925578B2 (ja) * 2012-04-25 2016-05-25 アネスト岩田株式会社 スクロール膨張機
JP5931563B2 (ja) * 2012-04-25 2016-06-08 アネスト岩田株式会社 スクロール膨張機
JP2015001175A (ja) 2013-06-14 2015-01-05 アネスト岩田株式会社 スクロール式流体機械

Also Published As

Publication number Publication date
WO2018139500A1 (ja) 2018-08-02
JP2018119522A (ja) 2018-08-02
EP3561303A1 (en) 2019-10-30
EP3561303A4 (en) 2019-12-18
CN110226040A (zh) 2019-09-10
EP3561303B1 (en) 2020-12-30

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