US20190178249A1 - Co-rotating scroll compressor - Google Patents

Co-rotating scroll compressor Download PDF

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Publication number
US20190178249A1
US20190178249A1 US16/321,920 US201716321920A US2019178249A1 US 20190178249 A1 US20190178249 A1 US 20190178249A1 US 201716321920 A US201716321920 A US 201716321920A US 2019178249 A1 US2019178249 A1 US 2019178249A1
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US
United States
Prior art keywords
driving
driven
side wall
scroll
end plate
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
US16/321,920
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English (en)
Inventor
Takuma YAMASHITA
Takahide Ito
Makoto Takeuchi
Keita Kitaguchi
Hirofumi Hirata
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
Mitsubishi Heavy Industries Thermal Systems Ltd
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 Mitsubishi Heavy Industries Ltd, Mitsubishi Heavy Industries Thermal Systems Ltd filed Critical Mitsubishi Heavy Industries Ltd
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIRATA, HIROFUMI, ITO, TAKAHIDE, KITAGUCHI, Keita, TAKEUCHI, MAKOTO, YAMASHITA, Takuma
Publication of US20190178249A1 publication Critical patent/US20190178249A1/en
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
Abandoned 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
    • F04C18/023—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/06—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements
    • F01C17/063—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements with only rolling movement
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • 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
    • F04C2240/20—Rotors

Definitions

  • the present invention relates to a co-rotating scroll compressor.
  • the co-rotating scroll compressor includes a driving-side scroll and a driven-side scroll that rotates together with and in synchronization with the driving-side scroll.
  • the co-rotating scroll compressor rotates the driving shaft and the driven shaft in the same direction at the same angular velocity by offsetting a driven shaft that supports the rotation of the driven-side scroll from a driving shaft that rotates the driving-side scroll by the turning radius.
  • An outer peripheral ring portion is provided on the driven-side scroll in PTL 1, and this outer peripheral annular block portion has a shape that surrounds the outer periphery of the driven scroll.
  • the outer peripheral annular block portion is advantage in that the rigidity of the driven scroll is enhanced and the deformation of an end plate is suppressed, but it becomes difficult to respond to high acceleration because the rotation inertia force increases.
  • the present invention has been made in view of the situation as above, and an object thereof is to provide a co-rotating scroll compressor that enables speed up and high acceleration.
  • a co-rotating scroll compressor of the present invention employs the following solutions.
  • a co-rotating scroll compressor includes: a driving-side scroll member driven by a drive unit so as to rotate, and including a plurality of spiral driving-side walls provided about a center of a driving-side end plate at predetermined angular intervals; a driven-side scroll member including spiral driven-side walls, the driven-side walls being provided about a center of a driven-side end plate at predetermined angular intervals and in a number corresponding to the driving-side walls, the driven-side walls being engaged with the corresponding driving-side walls so as to form a compression space; a synchronous driving mechanism that transmits driving force from the driving-side scroll member to the driven-side scroll member so that the driving-side scroll member and the driven-side scroll member rotationally move in a same direction at a same angular velocity; and a driving-side supporting member arranged across the driven-side end plate, fixed to a distal end side of the driving-side walls in an rotation direction, and rotated together with the driving-side
  • the driving-side walls arranged about the center of the end plate of the driving-side scroll member at predetermined angular intervals and the corresponding driven-side walls of the driven-side scroll member are engaged with each other.
  • a plurality of pairs each formed by one driving-side wall and one driven-side are provided, and the scroll-type compressor including a plurality of lines of walls is formed.
  • the driving-side scroll member is driven by the drive unit so as to rotate, and the driving force transmitted to the driving-side scroll member is transmitted to the driven-side scroll member via the synchronous driving mechanism.
  • the driven-side scroll member rotationally moves in the same direction at the same angular velocity as the driving-side scroll member while rotating.
  • the co-rotating scroll compressor in which both of the driving-side scroll member and the driven-side scroll member rotate is provided.
  • the fixing portions of the walls to which the supporting members are fixed has higher rigidity as compared to other regions of the walls. Therefore, it is conceived to be preferred that the fixing portions be provided on the radially outside end portions of the walls subjected to the largest centrifugal force.
  • the fixing portions are provided on the radially outside end portions, the rigidity becomes higher but the stress caused by the centrifugal force increases on the contrary because the mass of the fixing portions becomes larger than the other wall regions.
  • the fixing portions are provided in positions close to the radially outside end portions of the walls and separated from the radially outside end portions in the inner circumferential direction of the walls. As a result, as compared to a case where the fixing portions are placed on the radially outside end portions, the stress generated on the fixing portions can be reduced, and hence the speed up and the high acceleration can be responded to.
  • an angle formed by a line connecting a center of the driving-side wall and the radially outside end portion to each other and a line connecting the center of the driving-side wall and a middle of the fixing portion to each other is 10° or more and 50° or less when the driving-side wall is seen in planar view; and/or an angle formed by a line connecting a center of the driven-side wall and the radially outside end portion to each other and a line connecting the center of the driven-side wall and a middle of the fixing portion to each other is 10° or more and 50° or less when the driven-side wall is seen in planar view.
  • the angle formed by the line connecting the center of the wall and the radially outside end portion to each other and the line connecting the center of the wall and the middle of the fixing portion to each other is preferably 10° or more and 50° or less.
  • the driving-side scroll member includes: a first driving-side scroll portion including a first driving-side end plate and a first driving-side wall, the first driving-side scroll portion being driven by the drive unit; a second driving-side scroll member including a second driving-side end plate and a second driving-side wall; and a wall fixing portion that performs fixing in a state in which distal ends of the first driving-side wall and the second driving-side wall in a rotation axis direction face each other;
  • the driven-side scroll member includes: a first driven-side wall provided on one side surface of the driven-side end plate, the first driven-side wall being engaged with the first driving-side wall; and a second driven-side wall provided on another side surface of the driven-side end plate, the second driven-side wall being engaged with the second driving-side wall; and the driven-side supporting member includes: a first supporting member arranged across the first driving-side end plate, fixed on a distal end side of the first
  • the compression spaces are formed on both side surfaces of the driven-side end plate.
  • the rigidity of the walls is increased.
  • the fixing portion is provided in a position close to the radially outside end portion of the wall and separated from the radially outside end portion in the inner circumferential direction of the wall.
  • the fixing portion of the wall to which the supporting member is fixed is provided in a position close to the radially outside end portion of the wall and separated from the radially outside end portion in the inner circumferential direction of the wall.
  • FIG. 1 is a longitudinal cross-sectional view illustrating a co-rotating scroll compressor according to a first embodiment of the present invention.
  • FIG. 2 is a plan view illustrating a driving-side scroll member in FIG. 1 .
  • FIG. 3 is a plan view illustrating a driven-side scroll member in FIG. 1 .
  • FIG. 4 is a side view of a driving-side supporting member in FIG. 1 seen from the exhaust side.
  • FIG. 5 is a side view of the driven-side supporting member in FIG. 1 seen from the motor side.
  • FIG. 6 is a longitudinal cross-sectional view illustrating a co-rotating scroll compressor according to a second embodiment of the present invention.
  • a first embodiment of the present invention is described below with reference to FIG. 1 and the like.
  • FIG. 1 illustrates a co-rotating scroll compressor 1 A.
  • the co-rotating scroll compressor 1 A can be used as a supercharger that compresses combustion air (fluid) to be supplied to an internal combustion engine such as a vehicle engine, for example.
  • the co-rotating scroll compressor 1 A includes a housing 3 , and a driving-side scroll member 7 and the driven-side scroll member 9 accommodated in the other end side of the housing 3 .
  • the housing 3 has a substantially cylindrical shape, and has one end (not shown) on which a motor accommodation portion that accommodates a drive unit such as an electric motor is provided. As illustrated in FIG. 1 , a scroll accommodation portion 3 b that accommodates the scroll members 7 and 9 are included on the other end. An exhaust opening 3 d for exhausting air that has been compressed is formed in an end portion of the scroll accommodation portion 3 b . Note that, although not shown in FIG. 1 , an air suction opening that sucks air is provided in the housing 3 .
  • the rotational driving force from a rotor of the motor is transmitted to a driving-side shaft portion 7 c of the driving-side scroll member 7 that rotates about a driving rotational axis CL 1 .
  • the driving-side scroll member 7 includes a driving-side end plate 7 a , and a spiral driving-side wall 7 b provided on one side of the driving-side end plate 7 a .
  • the driving-side end plate 7 a is connected to the driving-side shaft portion 7 c connected to a driving shaft 6 , and extends in a direction orthogonal to the driving-side rotational axis CL 1 .
  • the driving-side shaft portion 7 c is provided so as to be rotatable with respect to the housing 3 via a driving-side bearing 11 that is a ball bearing.
  • the driving-side end plate 7 a has a substantially disk-like shape when seen in planar view.
  • the driving-side scroll member 7 includes three spiral driving-side walls 7 b , that is, three lines of spiral driving-side walls 7 b .
  • the three lines of driving-side walls 7 b are provided about the driving-side rotational axis CL 1 at regular intervals.
  • Radially outside end portions 7 e of the driving-side walls 7 b are not fixed to the other wall portions and are independent. That is, wall portions that connect the radially outside end portions 7 e to each other so as to provide reinforcement are not provided.
  • Driving-side fixing portions 7 f for fixing a driving-side supporting member 20 described below is provided near the radially outside end portions 7 e of the driving-side walls 7 b .
  • the driving-side fixing portion 7 f is a bulging portion obtained by increasing the board thickness of the driving-side wall 7 b radially outward.
  • the forming position of the driving-side fixing portion 7 f is a position separated from the radially outside end portion 7 e in the inner circumferential direction (winding starting direction) of the driving-side wall 7 b .
  • an angle ⁇ formed by the line connecting the driving-side rotational axis CL 1 and the radially outside end portion 7 e to each other and the line connecting the driving-side rotational axis CL 1 and the middle of the driving-side fixing portion 7 f (more specifically, the center of a fastening member 24 a ) to each other is 10° or more and 50° or less.
  • the driven-side scroll member 9 is arranged so as to engage with the driving-side scroll member 7 , and includes a driven-side end plate 9 a and a spiral driven-side wall 9 b provided on one side of the driven-side end plate 9 a .
  • a driven-side shaft portion 9 c that extends in the direction of a driven-side rotational axis CL 2 is connected to the driven-side end plate 9 a .
  • the driven-side shaft portion 9 c is provided so as to be rotatable with respect to the housing 3 via a driven-side bearing 13 that is a double row ball bearing.
  • the driven-side end plate 9 a has a substantially disk-like shape when seen in planar view. As illustrated in FIG. 3 , three spiral driven-side walls 9 b , that is, three lines of spiral driven-side walls 9 b are provided in the driven-side scroll member 9 . The three lines of driven-side walls 9 b are arranged about the driven-side rotational axis CL 2 at regular intervals. An exhaust port 9 d that exhausts air that has been compressed is formed in substantially the middle of the driven-side end plate 9 a . The exhaust port 9 d communicates with the exhaust opening 3 d formed in the housing 3 . Radially outside end portions 9 e of the driven-side walls 9 b are not fixed to the other wall portions and are independent. That is, wall portions that connect the radially outside end portions 9 e to each other so as to provide reinforcement are not provided.
  • Driven-side fixing portions 9 f for fixing a driven-side supporting member 22 described below is provided near the radially outside end portions 9 e of the driven-side walls 9 b .
  • the driven-side fixing portion 9 f is a bulging portion obtained by increasing the board thickness of the driven-side wall 9 b radially outward.
  • the forming position of the driven-side fixing portion 9 f is a position separated from the radially outside end portion 9 e in the inner circumferential direction (winding starting direction) of the driven-side wall 9 b .
  • an angle ⁇ formed by the line connecting the driven-side rotational axis CL 2 and the radially outside end portion 9 e to each other and the line connecting the driven-side rotational axis CL 2 and the middle of the driven-side fixing portion 9 f (more specifically, the center of a fastening member 24 b ) to each other is 10° or more and 50° or less.
  • the driving-side scroll member 7 rotates about the driving-side rotational axis CL 1 and the driven-side scroll member 9 rotates about the driven-side rotational axis CL 2 .
  • the driving-side rotational axis CL 1 and the driven-side rotational axis CL 2 are offset from each other by a distance with which a compression chamber can be formed.
  • the driving-side supporting member 20 is fixed to the driving-side fixing portion 7 f on the distal end (free end) of the driving-side wall 7 b of the driving-side scroll member 7 via the fastening member 24 a such as a pin or a bolt.
  • the driven-side scroll member 9 is sandwiched between the driving-side supporting member 20 and the driving-side scroll member 7 . Therefore, the driven-side end plate 9 a is arranged so as to be opposed to the driving-side supporting member 20 .
  • the driving-side supporting member 20 includes a shaft portion 20 a on the center side.
  • the shaft portion 20 a is rotatably attached with respect to the housing 3 via a bearing 26 for the driving-side supporting member that is a ball bearing.
  • the driving-side supporting member 20 rotates about the driving-side rotational axis CL 1 as with the driving-side scroll member 7 .
  • the driving-side supporting member 20 includes a radially extending portion 20 b that extends radially outward to the position of the outer periphery of the driving-side wall 7 b for each position in which the distal end of the driving-side wall 7 b is fixed by the fixing portion 7 f (see FIG. 2 ).
  • the region between the radially extending portions 20 b has a shape that does not extend to the outer periphery side of the driving-side wall 7 b , and saves weight.
  • the radially extending portions 20 b are provided in three directions at equiangular intervals. Note that, in FIG. 4 , the driving-side supporting member 20 and the driven-side scroll member 9 are illustrated and the driving-side scroll member 7 is not illustrated.
  • a pin ring mechanism 15 is provided between the driving-side supporting member 20 and the driven-side end plate 9 a .
  • the pin ring mechanism 15 is used as a synchronous driving mechanism that transmits driving force from the driving-side scroll member 7 to the driven-side scroll member 9 so that both of the scroll members 7 and 9 rotationally move in the same direction at the same angular velocity. That is, a ring member 15 a that is a ball bearing is provided in the driven-side end plate 9 a , and a pin member 15 b is provided in the driving-side supporting member 20 . As illustrated in FIG. 4 , three pin members 15 b are provided so as to correspond to the positions of the radially extending portions 20 b of the driving-side supporting member 20 .
  • the driven-side supporting member 22 is fixed to the distal end (free end) of the driven-side wall 9 b of the driven-side scroll member 9 via the fastening member 24 b such as a pin or a bolt.
  • the driving-side scroll member 7 is sandwiched between the driven-side supporting member 22 and the driven-side scroll member 9 . Therefore, the driving-side end plate 7 a is arranged so as to be opposed to the driven-side supporting member 22 .
  • the driven-side supporting member 22 includes a shaft portion 22 a on the center side.
  • the shaft portion 22 a is rotatably attached with respect to the housing 3 via a bearing 28 for the driven-side supporting member that is a ball bearing.
  • the driven-side supporting member 22 rotates about the driven-side rotational axis CL 2 as with the driven-side scroll member 9 .
  • the driven-side supporting member 22 includes a radially extending portion 22 b that extends radially outward to the position of the outer periphery of the driven-side wall 9 b for each position in which the distal end of the driven-side wall 9 b is fixed.
  • the region between the radially extending portions 22 b has a shape that does not extend to the outer periphery side of the driven-side wall 9 b , and saves weight.
  • the radially extending portions 22 b are provided in three directions at equiangular intervals. Note that, in FIG. 5 , the driven-side supporting member 22 and the driving-side scroll member 7 are illustrated and the driven-side scroll member 9 is not illustrated.
  • the pin ring mechanism 15 is provided between the driven-side supporting member 22 and the driving-side end plate 7 a .
  • the pin ring mechanism 15 is used as a synchronous driving mechanism that transmits driving force from the driving-side scroll member 7 to the driven-side scroll member 9 so that both of the scroll members 7 and 9 rotationally move in the same direction at the same angular velocity. That is, the ring member 15 a is provided in the driving-side end plate 7 a , and the pin member 15 b is provided in the driven-side supporting member 22 .
  • three pin members 15 b are provided so as to correspond to the positions of the radially extending portions 22 b of the driven-side supporting member 22 .
  • the co-rotating scroll compressor 1 A having the abovementioned configuration operates as follows.
  • the driving-side shaft portion 7 c connected to the driving shaft also rotates.
  • the driving-side scroll member 7 rotates about the driving-side rotational axis CL 1 .
  • the driving force is transmitted from the driving-side end plate 7 a to the driven-side supporting member 22 via the pin ring mechanism 15 .
  • the driving force is transmitted from the driving-side supporting member 20 to the driven-side end plate 9 a via the pin ring mechanism 15 .
  • the driving force is transmitted to the driven-side scroll member 9 , and the driven-side scroll member 9 rotates about the driven-side rotational axis CL 2 .
  • the pin member 15 b of the pin ring mechanism 15 moves while being in contact with the ring member 15 a , and hence both of the scroll members 7 and 9 rotationally move in the same direction at the same angular velocity.
  • both of the scroll members 7 and 9 rotationally move in the same direction at the same angular velocity
  • the air sucked from the suction opening in the housing 3 is sucked from the outer periphery side of both of the scroll members 7 and 9 , and is taken into the compression chamber formed by both of the scroll members 7 and 9 .
  • the capacity of the compression chamber decreases as the compression chamber approaches the center side, and air is compressed accordingly.
  • the air compressed as above flows through the exhaust port 9 d in the driven-side scroll member 9 and is exhausted to the outside from the exhaust opening 3 d in the housing 3 .
  • the exhausted compressed air is guided to an internal combustion engine (not shown) and is used as combustion air.
  • the fixing portions 7 f and 9 f of the walls 7 b and 9 b to which the supporting members 20 and 22 are fixed have higher rigidity as compared to other regions of the walls 7 b and 9 b . Therefore, it is conceived to be preferred that the fixing portions 7 f and 9 f be provided on the radially outside end portions 7 e and 9 e of the walls 7 b and 9 b subjected to the largest centrifugal force.
  • the fixing portions 7 f and 9 f are provided on the radially outside end portions 7 e and 9 e , the rigidity becomes higher but the stress caused by the centrifugal force increases on the contrary because the mass of the fixing portions 7 f and 9 f becomes larger than the other wall regions.
  • the fixing portions 7 f and 9 f are provided in positions close to the radially outside end portions 7 e and 9 e of the walls 7 b and 9 b and separated from the radially outside end portions 7 e and 9 e in the inner circumferential direction of the walls 7 b and 9 b .
  • the stress generated on the fixing portions 7 f and 9 f can be reduced, and hence the speed up and the high acceleration can be responded to.
  • the speed up of 10000 rotations per minute or more, preferably 15000 rotations or more can be responded to, and high acceleration that reaches to 10000 rotations in 0.5 seconds at the time of start-up can be responded to.
  • the arrangement and the structure of the fixing portions 7 f and 9 f described in the first embodiment can be also applied to a co-rotating scroll compressor described below.
  • FIG. 6 illustrates a co-rotating scroll compressor 1 B according to this embodiment. Note that structures similar to those in the co-rotating scroll compressor 1 A described with reference to FIG. 1 are the same denoted by the same reference character, and the description thereof is omitted.
  • the driving-side scroll member 70 includes a first driving-side scroll portion 71 on the motor side (the right side in FIG. 6 ) and a second driving-side scroll portion 72 on the exhaust opening 3 d side.
  • the first driving-side scroll portion 71 includes a first driving-side end plate 71 a and a first driving-side wall 71 b .
  • Three lines of first driving-side walls 71 b are provided as with the abovementioned driving-side walls 7 b (see FIG. 2 ).
  • the second driving-side scroll portion 72 includes a second driving-side end plate 72 a and a second driving-side wall 72 b .
  • Three lines of second driving-side walls 72 b are provided as with the abovementioned driving-side walls 7 b (see FIG. 2 ).
  • a second driving-side shaft portion 72 c that extends in the direction of the driving-side rotational axis CL 1 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 via a second driving-side bearing 14 that is a ball bearing.
  • An exhaust port 72 d is formed in the second driving-side shaft portion 72 c along the driving-side rotational axis CL 1 .
  • the first driving-side scroll portion 71 and the second driving-side scroll portion 72 are fixed in a state in which the distal ends (free ends) of the walls 71 b and 72 b are facing each other.
  • the first driving-side scroll portion 71 and the second driving-side scroll portion 72 are fixed by a bolt (wall fixing portion) 31 fastened with respect to flange parts 73 provided in a plurality of places so as to protrude radially outward.
  • the driven-side scroll member 90 includes a driven-side end plate 90 a provided in substantially the middle in the axial direction (the horizontal direction in FIG. 6 ).
  • a through hole (not shown) is formed in the middle of the driven-side end plate 90 a , and air that has been compressed flows to the exhaust port 72 d.
  • Driven-side walls 91 b and 92 b are provided on both sides of the driven-side end plate 90 a .
  • the first driven-side wall 91 b provided from the driven-side end plate 90 a to the motor side is engaged with the first driving-side wall 71 b of the first driving-side scroll portion 71
  • the second driven-side wall 92 b provided from the driven-side end plate 90 a to the exhaust opening 3 d side is engaged with the second driving-side wall 72 b of the second driving-side scroll portion 72 .
  • a first supporting member 33 and a second supporting member 35 are provided on both ends of the driven-side scroll member 90 in the axial direction (the horizontal direction in FIG. 6 ).
  • the first supporting member 33 is arranged on the motor side (the right side in FIG. 6 ), and the second supporting member 35 is arranged on the exhaust opening 3 d side.
  • the first supporting member 33 is fixed to a first fixing portion 91 f on the distal end (free end) of the first driven-side wall 91 b by a fastening member 25 a such as a pin or a bolt
  • the second supporting member 35 is fixed to a second fixing portion 92 f on the distal end (free end) of the second driven-side wall 92 b by a fastening member 25 b such as a pin or a bolt.
  • the fixing portions 91 f and 92 f provided on the driven-side walls 91 b and 92 b are bulging portions obtained by increasing the board thickness of the driven-side walls 91 b and 92 b radially outward, and are in positions separated from the radially outside end portions in the inner circumferential direction (winding starting direction) of the driven-side walls 91 b and 92 b.
  • a shaft portion 33 a is provided on the central axis side of the first supporting member 33 , and the shaft portion 33 a is fixed to the housing 3 via a bearing 37 for the first supporting member.
  • a shaft portion 35 a is provided on the central axis side of the second supporting member 35 , and the shaft portion 35 a is fixed to the housing 3 via a bearing 38 for the second supporting member.
  • the driven-side scroll member 90 is rotated about the second center axis CL 2 via the supporting members 33 and 35 .
  • the shapes of the supporting members 33 and 35 are similar to that of the driven-side supporting member 22 in the first embodiment described with reference to FIG. 5 .
  • the pin ring mechanism 15 is provided between the first supporting member 33 and the first driving-side end plate 71 a . That is, the ring member 15 a is provided in the first driving-side end plate 71 a , and the pin member 15 b is provided in the first supporting member 33 . As illustrated in FIG. 5 , three pin members 15 b are provided so as to correspond to the positions of the supporting portions of the first supporting member 33 .
  • the pin ring mechanism 15 is provided between the second supporting member 35 and the second driving-side end plate 72 a . That is, the ring member 15 a is provided in the second driving-side end plate 72 a , and the pin member 15 b is provided in the second supporting member 35 . As illustrated in FIG. 5 , three pin members 15 b are provided so as to correspond to the positions of the supporting portions of the second supporting member 35 .
  • the scroll accommodation portion 3 b of the housing 3 is divided at the substantially middle portion of the scroll members 70 and 90 in the axial direction, and fixed by a bolt 32 .
  • the co-rotating scroll compressor 1 B having the abovementioned configuration operates as follows.
  • both of the scroll members 70 and 90 rotationally move in the same direction at the same angular velocity
  • the air sucked from the suction opening in the housing 3 is sucked from the outer periphery side of both of the scroll members 70 and 90 , and is taken into the compression chamber formed by both of the scroll members 70 and 90 .
  • the compression chamber formed by the first driving-side wall 71 b and the first driven-side wall 91 b and the compression chamber formed by the second driving-side wall 72 b and the second driven-side wall 92 b are separately compressed.
  • the capacity of the compression chambers decreases as the compression chambers approach the center side, and the air is compressed accordingly.
  • the air compressed by the first driving-side wall 71 b and the first driven-side wall 91 b flows through a through hole 90 h formed in the driven-side end plate 90 a , and is merged with air compressed by the second driving-side wall 72 b and the second driven-side wall 92 b .
  • the merged air flows through the exhaust port 72 d and is exhausted to the outside from the exhaust opening 3 d in the housing 3 .
  • the exhausted compressed air is guided to an internal combustion engine (not shown) and is used as combustion air.
  • the fixing portions 91 f and 92 f are provided in places separated from the radially outside end portions of the driven-side walls 91 b and 92 b in the inner circumferential direction, and hence the stress generated on the fixing portions 91 f and 92 f can be reduced. As a result, the speed up and the high acceleration can be responded to.
  • the co-rotating scroll compressor is used as the supercharger, but the present invention is not limited thereto, and the co-rotating scroll compressor can be widely used as long as fluid is compressed.
  • the co-rotating scroll compressor can be used as a refrigerant compressor used in an air conditioning unit.
  • an equiangular interval that is 120° is preferred, but the present invention is not limited thereto.
  • the angle tolerance for the equiangular interval is ⁇ 10°, and the interval may preferably be a substantially equiangular interval of which angle tolerance is ⁇ 1°.
  • pin ring mechanism 15 is used as a synchronous driving mechanism, but the present invention is not limited thereto, and the pin ring mechanism 15 may be used as a crank pin mechanism, for example.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US16/321,920 2016-08-01 2017-08-01 Co-rotating scroll compressor Abandoned US20190178249A1 (en)

Applications Claiming Priority (3)

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JP2016-151542 2016-08-01
JP2016151542A JP6727978B2 (ja) 2016-08-01 2016-08-01 両回転スクロール型圧縮機
PCT/JP2017/027944 WO2018025879A1 (fr) 2016-08-01 2017-08-01 Compresseur de type à double volute tournante

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US20190178249A1 true US20190178249A1 (en) 2019-06-13

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EP (1) EP3480466B1 (fr)
JP (1) JP6727978B2 (fr)
CN (1) CN109661518B (fr)
WO (1) WO2018025879A1 (fr)

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WO2019171448A1 (fr) * 2018-03-06 2019-09-12 三菱重工業株式会社 Compresseur à spirales à double rotation
JP6698726B2 (ja) * 2018-03-12 2020-05-27 三菱重工業株式会社 両回転スクロール型圧縮機
US11359631B2 (en) * 2019-11-15 2022-06-14 Emerson Climate Technologies, Inc. Co-rotating scroll compressor with bearing able to roll along surface
US11624366B1 (en) 2021-11-05 2023-04-11 Emerson Climate Technologies, Inc. Co-rotating scroll compressor having first and second Oldham couplings

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Publication number Priority date Publication date Assignee Title
JPS5360443A (en) 1976-11-10 1978-05-31 Hitachi Ltd Shaft bearing device
US6884047B1 (en) * 2003-10-20 2005-04-26 Varian, Inc. Compact scroll pump
JP5812693B2 (ja) * 2011-05-09 2015-11-17 アネスト岩田株式会社 スクロール式流体機械
US20130236344A1 (en) * 2012-03-09 2013-09-12 RichStone Limited (Korea) Scroll fluid machine
JP5931564B2 (ja) * 2012-04-25 2016-06-08 アネスト岩田株式会社 両回転型スクロール膨張機及び該膨張機を備えた発電装置
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
JP6185297B2 (ja) * 2013-06-14 2017-08-23 アネスト岩田株式会社 スクロール式流体機械
JP6441645B2 (ja) * 2014-11-07 2018-12-19 アネスト岩田株式会社 スクロール流体機械

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EP3480466B1 (fr) 2020-09-30
EP3480466A1 (fr) 2019-05-08
JP6727978B2 (ja) 2020-07-22
CN109661518A (zh) 2019-04-19
WO2018025879A1 (fr) 2018-02-08
CN109661518B (zh) 2021-01-01
JP2018021463A (ja) 2018-02-08
EP3480466A4 (fr) 2019-06-26

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