US20010033801A1 - Scroll compressor and scroll-type pressure transformer - Google Patents

Scroll compressor and scroll-type pressure transformer Download PDF

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Publication number
US20010033801A1
US20010033801A1 US09/835,497 US83549701A US2001033801A1 US 20010033801 A1 US20010033801 A1 US 20010033801A1 US 83549701 A US83549701 A US 83549701A US 2001033801 A1 US2001033801 A1 US 2001033801A1
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United States
Prior art keywords
orbiting
scroll
shaft
fixed
casing
Prior art date
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Abandoned
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US09/835,497
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English (en)
Inventor
Mineo Takahashi
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.)
A&A Corp
Unipulse Corp
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Individual
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Priority claimed from JP2000118467A external-priority patent/JP3533143B2/ja
Priority claimed from JP2000123920A external-priority patent/JP3540244B2/ja
Priority claimed from JP2000208326A external-priority patent/JP3430128B2/ja
Application filed by Individual filed Critical Individual
Assigned to UNIPULSE CORPORATION, A & A CORPORATION reassignment UNIPULSE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAKAHASHI, MINEO
Publication of US20010033801A1 publication Critical patent/US20010033801A1/en
Priority to US10/162,582 priority Critical patent/US20020150491A1/en
Priority to US10/162,600 priority patent/US20020150492A1/en
Priority to US10/162,984 priority patent/US20020141892A1/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
    • 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
    • F04C29/0085—Prime movers
    • 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
    • F04C18/0215—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 only one member is moving
    • F04C18/0223—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 only one member is 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle

Definitions

  • the present invention relates to a scroll compressor used as air compressors, vacuum pumps, refrigerant gas compressors, and oxygen compressors. Further, the present invention relates to a scroll compressor used as a pressure transformer, namely, a scroll-type pressure transformer capable of compressing or reducing pressure of gas or air.
  • FIG. 6 is a schematic sectional view showing a conventional scroll compressor as described in Japanese Patent Laid-Open Publication No. Sho 57-24486.
  • this compressor includes a bearing support 2 fixed to a casing 1 , and a stationary scroll 3 fixed to the bearing support 2 and formed with a spiral lap.
  • the compressor further includes a stator 4 fixed to the casing 1 , a rotary shaft 6 supported rotatably by the bearing support 2 and the casing 1 through bearings 7 and 8 , a rotor 5 fixed to the rotary shaft 6 , and an orbiting shaft 9 supported orbitally by the rotary shaft 6 through bearings 10 and 11 .
  • Respective axes of the rotary shaft 6 and the orbiting shaft 9 are eccentrically arranged.
  • the orbiting shaft 9 is provided integrally with an orbiting scroll 12 having a lap formed in the same configuration as that of the stationary scroll 3 . These laps of the orbiting scroll 12 and the stationary scroll 3 are overlappedly engaged with each other to form a plurality of compression chambers.
  • An Oldham's ring is provided between the orbiting scroll 12 and the bearing support 2 as an anti-self-rotation device 13 for preventing the self-rotation of the orbiting scroll 12 .
  • a suction pipe 14 is connected to the casing 1 , and a discharge pipe 15 is connected to the stationary scroll 3 .
  • a gas to be compressed such as refrigerant gas
  • a gas to be compressed such as refrigerant gas
  • the anti-self-rotation device 13 is provided between the orbiting scroll 12 and the bearing support 2 .
  • the anti-self-rotation device 13 is increased in temperature with temperature raise of the orbiting scroll 12 , resulting in shortened life of the anti-self-rotation device 13 .
  • the thermal expansion of the anti-self-rotation device 13 leads to degraded efficiency of the scroll compressor.
  • Such a scroll compressor has a problem to be improved in that it disadvantageously has a large dimension in the axial direction of the rotary shaft 6 , i.e., in the longitudinal direction of the sheet of FIG. 6.
  • scroll compressors using a mechanism wherein a scroll space between a stationary scroll and an orbiting scroll is gradually reduced by orbiting the orbiting scroll to the stationary scroll so as to compress the gas in the scroll space.
  • Such scroll compressors are currently used for various purposes, such as a compressor for air conditioners, due to their advantages of high compression efficiency and excellent quietness.
  • the above scroll compressors may serve as scroll vacuum pumps with a substantially same structure. These scroll vacuum pumps have the similar advantages as described above and thereby is used for various vacuum apparatuses.
  • FIGS. 16 and 17 show a conventional scroll compressor having such a structure.
  • this scroll compressor when a rotary shaft 261 of a motor 260 is rotated, a crank 262 a of a crankshaft 262 coupled to the motor by a joint 263 is eccentrically moved. Then, an orbiting scroll member 280 rotatably attached to the crank 262 a is orbited without self-rotation by means of an anti-self-rotation mechanism 290 .
  • a scroll space between a scroll of the orbiting scroll member 280 and a scroll of stationary scroll members 270 a , 270 b are reduced in volume and thereby a gas introduced in the scroll space is compressed.
  • the compressed gas is then discharged from a discharge port 278 through a discharge passage 271 .
  • the above conventional scroll compressor has a complexified structure because the orbiting scroll member 280 is rotatably coupled to the crank 262 a of the crankshaft 262 through a bearing 283 , and the self-rotation of the orbiting scroll member 280 is prevented by the anti-self-rotation mechanism 290 provided between the orbiting scroll member 280 and the stationary scroll member 270 b .
  • the bearing 283 of the orbiting scroll member 280 is required to have a high precision for bearing the crank 262 a and a high strength proof against the deforming force caused by the temperature difference in a partial portion of both scrolls.
  • the basic circle diameter of the scroll is increased due to the orbiting mechanism with the bearing 283 , and the dimension of the orbiting scroll member 280 is inevitably increased due to the structure with the anti-self-rotation mechanism.
  • the conventional scroll compressors results in a undesirably increased cost.
  • due to the above particular structure of the anti-self-rotation mechanism 290 it is difficult to adequately lubricate, and the temperature of the anti-self-rotation mechanism 290 is increased with temperature rise of the orbiting scroll member 280 . This leads to a degraded compression efficiency resulting from the deformation of the orbiting scroll member 280 caused by thermal expansion and vibration thereof, and to a shortened life of the anti-self-rotation mechanism 290 .
  • Such a scroll compressor typically has a structure wherein a gas is compressed in a space formed by each scroll of the stationary scroll members 270 a and 270 b and the orbiting scroll member 280 .
  • this scroll compressor comprises the motor 260 , the crankshaft 262 coupled to the rotary shaft 261 of the motor through the joint 263 , the pair of stationary scroll members 270 a and 270 b , the orbiting scroll member having a pair of scrolls on both sides thereof, the anti-self-rotation device 290 , and an inlet port 276 and the discharge port 278 mounted to the stationary scroll members 270 a and 270 b .
  • Spiral scrolls protrudes integrally from both sides of a disk-shaped base plate 285 of the orbiting scroll member 280 , respectively.
  • the volume of the space (scroll space) between the scrolls of the orbiting scroll member 280 and the spiral scrolls protruding integrally from respective inner surfaces of the stationary scroll members 270 a and 270 b are gradually reduced by the orbiting of the orbiting scroll member 280 .
  • the orbiting scroll member 280 At the center of tthe orbiting scroll member 280 is provided with a cylindrical hub 281 , and the crank 262 a of the crankshaft 262 penetrates the cylindrical hub 281 through the bearing 283 .
  • the innermost portion of the disk-shaped base plate 285 of the orbiting scroll member 280 facing the high-pressure areas of the scroll spaces is provided with a through hole 287 to communicate each high-pressure area of both scroll spaces.
  • a discharge passage 271 is formed in the one stationary scroll member 270 b , and each high-pressure area in both scroll spaces communicates with the discharge port 278 through the discharge passage 271 .
  • the stationary scroll member 270 a At the center of the stationary scroll member 270 a is provided with a through hole 273 , and a rotary portion 262 b of the crankshaft 262 penetrates through the hole 273 through a bearing 274 .
  • Another through hole is also provided at the center of the stationary scroll member 270 b , and the rotary portion 262 b of the crankshaft 262 penetrates this through hole through a bearing.
  • the crank-type anti-self-rotation mechanism generally comprises a pair (two) of a rotatable crank between the orbiting scroll base plate and the casing.
  • three rotatable cranks are provided in order to enhance the balance of the orbiting scroll base plate.
  • the anti-self-rotation mechanism 290 comprises three bearings 292 , 292 and 292 provided in the base plate 285 of the orbiting scroll member 280 , three bearings 294 , 294 and 294 provided in the stationary scroll member 270 b , and a crank member 296 rotatably supported by the bearings 292 and 294 adjacent to each other.
  • the three bearings 292 , 292 and 292 provided in the orbiting scroll member 280 are located at apexes of a first equilateral triangle T 1 , respectively, and the three bearings 294 , 294 and 294 provided at the stationary scroll member 270 b are located at apexes of a second equilateral triangle T 2 slightly out of alignment to the first equilateral triangle T 1 with the same size as the first equilateral triangle T 1 .
  • the center O 1 of the first equilateral triangle T 1 lies at the center of the crank 262 a of the crankshaft 262 .
  • the center O 2 of the second equilateral triangle T 2 lies at the center of the rotary portion 262 b of the crankshaft 262 .
  • the scroll compressor shown in FIGS. 16 to 18 may be used as a scroll vacuum pump.
  • they inevitably involve the problems of complex structure, high cost, and degraded efficiency.
  • the present invention has been embodied to solve the above problem.
  • a scroll compressor comprises a casing, a stationary scroll fixed to said casing, a stator fixed to said casing, a rotary shaft rotatably supported by said casing, a rotor fixed to said rotary shaft, an orbiting shaft eccentrically and rotatably supported by said rotary shaft, an orbiting scroll fixed to said orbiting shaft, and an anti-self-rotation device having a stationary portion fixed to said casing and a movable portion engaged with a certain portion of said orbiting shaft.
  • a scroll compressor comprising a fixed body, a stationary scroll which is a part of a compressor body and fixed to said fixed body, a rotary shaft rotatably supported by said fixed body, a driving device for rotatably driving said rotary shaft, a hollow orbiting shaft eccentrically and rotatably supported by said rotary shaft, an anti-self-rotation device for preventing the self-rotation of said hollow orbiting shaft, and a hollow orbiting scroll which is a part of said compressor body and fixed to said hollow orbiting shaft, wherein said compressor body is located inside said hollow orbiting shaft.
  • a scroll compressor comprises a casing, a stationary scroll which is a part of a compressor body and fixed to said casing, a stator fixed to said casing, a rotary shaft rotatably supported by said casing, a rotor fixed to said rotary shaft, an orbiting shaft eccentrically and rotatably supported by said rotary shaft, an anti-self-rotation device for preventing the self-rotation of said orbiting shaft, and an orbiting scroll which is a part of said compressor body and fixed to said orbiting shaft, wherein said compressor body is located inside said rotor.
  • a hollow orbiting shaft may be applied as said orbiting shaft.
  • a mounting member may be fixed inside said hollow orbiting shaft to mount said orbiting scroll on said mounting member.
  • said rotor may be fixed to said rotary shaft through a coupling member.
  • the orbiting scroll member may be orbited without its self-rotation by mounting an orbiting shaft to a rotary shaft of a motor, and then attaching an anti-self-rotation mechanism to an orbiting shaft and mounting it between the orbiting plate and a casing, followed by fastening an orbiting scroll to the orbiting shaft. Based on this knowledge, the present invention has been completed.
  • a scroll-type pressure transformer comprises a casing, a motor supported by said casing through a bearing and provided with a rotary shaft having an eccentric hollow portion, an orbiting shaft penetrating said hollow portion of said rotary shaft and rotatably supported by said rotary shaft through a bearing, an orbiting scroll member fastened to said orbiting shaft and having scrolls on both sides of said orbiting scroll member, a pair of stationary scroll members fixed to said casing and opposed to each scroll of said orbiting scroll member, an anti-self-rotation device provided in said orbiting shaft, a gas inlet port communicating with a low-pressure area of a pair of scroll spaces formed between said orbiting scroll member and said stationary scroll members on both sides of said orbiting scroll member, and a gas discharge port communicating with a high-pressure area of said scroll spaces.
  • the orbiting scroll member is fastened to the orbiting shaft slidably in the axial direction under various operating conditions. It is also preferable that the anti-self-rotation device is provided between the orbiting plate fixed to the orbiting shaft and the casing.
  • the scroll-type pressure transformer according to the present invention may serve as either of a scroll compressor and a scroll vacuum pump.
  • FIG. 1 is a schematic sectional view showing a scroll compressor according to the first embodiment of the present invention
  • FIG. 2 is a sectional view taken along the line A-A of FIG. 1;
  • FIG. 3 is a schematic sectional view showing a scroll compressor according to the second embodiment of the present invention.
  • FIG. 4 is a schematic sectional view showing a scroll compressor according to the third embodiment of the present invention.
  • FIG. 5 is a sectional view taken along the line B-B of FIG. 4;
  • FIG. 6 is a schematic sectional view showing a conventional scroll compressor.
  • FIG. 7 is a schematic sectional view showing a scroll compressor according to the fourth embodiment of the present invention.
  • FIG. 8 is a sectional view taken along the line C-C of FIG. 7;
  • FIG. 9 is a schematic sectional view showing a scroll compressor according to the fifth embodiment of the present invention.
  • FIG. 10 is a schematic sectional view showing a scroll compressor according to the sixth embodiment of the present invention.
  • FIG. 11 is a sectional view taken along the line D-D of FIG. 10;
  • FIG. 12 is a sectional view showing an overall structure of one example of a scroll-type pressure transformer according to the present invention.
  • FIG. 13 is a partially exploded view of a part of the scroll-type pressure transformer of FIG. 12;
  • FIG. 14 is an exploded view of another portion of the scroll-type pressure transformer of FIG. 12;
  • FIG. 15 is a sectional view showing an overall structure of another example of a scroll-type pressure transformer according to the present invention wherein an orbiting scroll member is fastened to the orbiting shaft slidably in the axial direction;
  • FIG. 16 is a sectional view showing an overall structure of one example of a conventional scroll compressor
  • FIG. 17 is a partially exploded view of the scroll compressor of FIG. 16.
  • FIG. 18 is a schematic view showing a principle of an anti-self-rotation mechanism of the scroll compressor of FIG. 16.
  • FIG. 1 is a schematic sectional view showing a scroll compressor according to the first embodiment of the present invention
  • FIG. 2 is a sectional view taken along the line A-A of FIG. 1.
  • a stationary scroll 22 is fixed to a casing 21
  • a spiral lap is provided in the stationary scroll 22
  • a stator 23 is fixed to the casing 21
  • Bearing supports 26 and 27 are also fixed to the casing 21
  • a rotary shaft 25 is rotatably supported by the bearing supports 26 and 27 through bearings 28 and 29
  • a rotor 24 is fixed to the rotary shaft 25 .
  • a motor comprises the stator 23 and the rotor 24 .
  • An orbiting shaft 30 is rotatably supported by the rotary shaft 25 through bearings 31 and 32 , and respective axes of the rotary shaft 25 and the orbiting shaft 30 are eccentrically arranged each other.
  • the orbiting shaft 30 is eccentrically and rotatably supported by the rotary shaft 25 .
  • An orbiting scroll 33 is mounted to the upper portion of the orbiting shaft 30 .
  • the orbiting scroll 33 is provided with a lap formed in the same configuration as that of the stationary scroll 22 . These laps of the orbiting scroll 33 and the stationary scroll 22 are overlappedly engaged with each other to form a plurality of compression chambers.
  • a compressor body comprises the stationary scroll 22 and the orbiting scroll 33 .
  • An orbiting plate 34 is fixed to the lower portion of the orbiting shaft 30 , i.e., the downward section on the sheet of FIG. 1, and an Oldham's ring 35 having protrusions 36 and 37 is provided between the bearing support 27 and the orbiting plate 34 .
  • Grooves 38 and 39 orthogonal to each other are provided in the bearing support 27 and the orbiting plate 34 , respectively, and the protrusions 36 and 37 are engaged with the grooves 38 and 39 .
  • This construction including the bearing support 27 and the Oldham's ring 35 provides an anti-self-rotation device which allows the orbiting shaft 30 to be eccentrically orbited and prevents the self-rotation of the orbiting shaft 30 .
  • the support member 27 as the stationary portion of the anti-self-rotation device is fixed to the casing 21 , and the Oldham's rings 35 as the movable portion of the anti-self-rotation device are engaged with the orbiting plate 34 as a certain portion of an orbiting shaft.
  • a suction pipe 40 is connected to the stationary scroll 22
  • a discharge pipe 41 is connected to the stationary scroll 22 .
  • Each of the suction pipe 40 and the discharge pipe 41 communicates with the compression chambers.
  • the eccentric-rotation driving unit comprises the casing 21 , the motor, the rotary shaft 25 , the orbiting shaft 30 , and the anti-self-rotation device.
  • FIG. 3 is a schematic sectional view showing a scroll compressor according to the second embodiment of the present invention, which is used as a refrigerant gas compressor.
  • a chamber 52 is liquid-tightly fixed to the casing 51 .
  • a stationary scroll 53 is fixed to the chamber 52 , and the stationary scroll 53 is provided with a spiral lap.
  • a high-pressure chamber 54 is fixed to the stationary scroll 53 , and a stator 55 is fixed to the casing 51 .
  • a rotary shaft 57 is rotatably supported by the casing 51 through ball bearings 58 and 59 , and a rotor 56 is fixed to the rotary shaft 57 .
  • a motor comprises the stator 55 , the rotor 56 .
  • an orbiting shaft 60 is rotatably supported by the rotary shaft 57 through ball bearings 61 and 62 . Respective axes of the rotary shaft 57 and the orbiting shaft 60 are eccentrically arranged each other. Specifically, the orbiting shaft 60 is eccentrically and rotatably supported by the rotary shaft 57 .
  • An orbiting scroll 63 is mounted to the upper portion of the orbiting shaft 60 .
  • a seal 64 is provided between the orbiting scroll 63 and the stationary scroll 53
  • a balancer 65 is mounted to the lower portion of the orbiting scroll 63 .
  • the orbiting scroll 63 is provided with a lap formed in the same configuration as that of the stationary scroll 53 .
  • Respective laps of the orbiting scroll 63 and the stationary scroll 53 are overlappedly engaged with each other to form a plurality of compressing chambers.
  • an orbiting plate 66 is fixed to the lower portion of the orbiting shaft 60 , i.e., in the downward section on the sheet of FIG. 3.
  • An Oldham's ring 67 having protrusions 68 and 69 is provided between the casing 51 and the orbiting plate 64 .
  • a groove 70 is provided in the casing 51 , and a slit 71 is provided in the orbiting plate 64 .
  • the groove 70 and the slit 71 are arranged in the directions orthogonal to each other (In FIG.
  • the portion of the casing 51 as the stationary portion of the anti-self-rotation device is fixed to the casing 51 , and the Oldham's ring 65 as the movable portion of the anti-self-rotation device is engaged with the orbiting plate 66 as the certain portion of the orbiting shaft.
  • a lid 72 is mounted to the lower portion of the casing 51 , i.e. the lower section on the sheet of FIG. 3.
  • a suction pipe 77 is connected to the stationary scroll 53 so as to communicate with the chamber 52 and the compressing chambers of the compressor body.
  • a discharge pipe 78 is connected with the high-pressure chamber 54 so as to communicate with the compressing chambers of the compressor body through a check valve 79 .
  • the eccentric-rotation driving unit comprises the casing 51 , the motor, the rotary shaft 57 , the orbiting shaft 60 , and the anti-self-rotation device.
  • FIG. 4 is a schematic sectional view showing a scroll compressor according to the third embodiment of the present invention
  • FIG. 5 is a sectional view taken along the line B-B of FIG. 4.
  • a support member 81 is fixed to the casing 21
  • a movable plate 82 is supported by the support member 81 so as to be movable in the longitudinal direction on the sheet of FIG. 5.
  • the movable plate 82 is formed with a rectangular opening 83 having a longitudinal direction orthogonal to the moving direction of the movable plate 82 .
  • Notched surfaces 84 are provided on both sides of the lower portion of the orbiting shaft 30 .
  • the notched surfaces 84 are arranged in parallel with the axis of the orbiting shaft 30 , and the notched surfaces 84 are also arranged in parallel with each other.
  • the notched surfaces 84 are engaged with the peripheral surface of the opening 83 extending in the width direction of the opening 83 .
  • this width direction of the opening 83 corresponds to a direction perpendicular to the longitudinal direction on the sheet of FIG. 5.
  • This construction including the support member 81 and the movable plate 82 provides an anti-self-rotation device which allows the orbiting shaft 30 to be eccentrically orbited and prevents the self-rotation of the orbiting shaft 30 .
  • the support member 81 as the stationary portion of the anti-self-rotation device is fixed to the casing 61 , and the movable plate 82 as the movable portion of the anti-self-rotation device are engaged with the notched surfaces 84 as the certain portion of an orbiting shaft.
  • the orbiting plate 34 , 66 is fixed at the lower portion of the orbiting shaft 30 , 60 .
  • the orbiting plate may be fixed to any other portion of the orbiting shaft.
  • the orbiting plate for example, is fixed to the upper potion of the orbiting shaft, an adverse effect of the torsion in the orbiting shaft may be reduced and thereby the efficiency of the compressor body may be enhanced.
  • the notch surfaces 84 are provided in the lower portion of the orbiting shaft 30 in the above embodiments, the notch surfaces may be provided in any other portion of the orbiting shaft.
  • the notch surface for example, is provided in the upper potion of the orbiting shaft, an adverse effect of the torsion in the orbiting shaft may be reduced and thereby the efficiency of the compressor body may be enhanced.
  • the movable plate first is divided into two parts at the middle thereof and then jointed after the orbiting shaft is inserted into the opening.
  • the compressor body may be provided to both sides of the orbiting shaft.
  • the stationary portion of the anti-self-rotation device is fixed to the casing, and the movable portion of the anti-self-rotation device is engaged with the certain portion of the orbiting shaft, so that the anti-self-rotation device does not be increased in the temperature even in the temperature raise of the orbiting scroll.
  • longer life of the anti-self-rotation device may be achieved.
  • less thermal expansion of the anti-self-rotation device may provide longer life and stable efficient of the anti-self-rotation device.
  • FIG. 7 is a schematic sectional view showing a scroll compressor according to the fourth embodiment of the present invention
  • FIG. 8 is a sectional view taken along the line C-C of FIG. 7.
  • a stationary scroll 122 is fixed to a casing or fixed body 121
  • a spiral lap is provided in the stationary scroll 122
  • a stator 123 is fixed to the casing 121 .
  • Bearing supports 126 and 127 are also fixed to the casing 121 , and a rotary shaft 125 is rotatably supported by the bearing supports 126 and 127 through bearings 128 and 129 .
  • a rotor 124 is fixed to the rotary shaft 125 .
  • a motor comprises the stator 123 and the rotor 124 , and this motor serves as a driving device for rotatably driving the rotary shaft 125 .
  • a hollow orbiting shaft 130 is rotatably supported by the rotary shaft 125 through bearings 131 and 132 , and respective axes of the rotary shaft 125 and the hollow orbiting shaft 130 are eccentrically arranged each other.
  • the hollow orbiting shaft 130 is eccentrically and rotatably supported by the rotary shaft 125 .
  • a mounting member 133 is fixed within the hollow orbiting shaft 130 , and an orbiting scroll 135 is mounted to the mounting portion 134 of the mounting member 133 .
  • the orbiting scroll 135 is provided with a lap formed in the same configuration as that of the stationary scroll 122 .
  • a compressor body comprises the stationary scroll 122 and the orbiting scroll 135 , and this compressor body is located inside the rotor 124 and the hollow orbiting shaft 130 .
  • a hollow orbiting plate 136 is fixed to the lower portion of the hollow orbiting shaft 130 , i.e., the downward section on the sheet of FIG. 7, and an Oldham's ring 137 having protrusions 138 and 139 is provided between the bearing support 127 and the hollow orbiting plate 136 .
  • Grooves 140 and 141 orthogonal to each other are provided in the bearing support 127 and the hollow orbiting plate 136 , respectively, and the protrusions 138 and 139 are engaged with the grooves 140 and 141 .
  • This construction including the Oldham's ring 137 provides an anti-self-rotation device which allows the hollow orbiting shaft 130 to be eccentrically orbited and prevents the self-rotation of the hollow orbiting shaft 130 .
  • the anti-self-rotation device is provided between the hollow orbiting plate 136 and the casing 121 .
  • a suction pipe 142 is connected to the stationary scroll 122
  • a discharge pipe 143 is connected to the stationary scroll 122 .
  • the eccentric-rotation driving unit comprises the casing 121 , the motor, the rotary shaft 125 , the hollow orbiting shaft 130 , and the anti-self-rotation device.
  • the compressor body is located inside the rotor 124 and the hollow orbiting shaft 130 so that the dimension in the axial direction of the rotary shaft 125 , i.e. in the longitudinal direction on the sheet of FIG. 7, may be reduced.
  • the hollow orbiting shaft 130 is not directly mounted to the compressor body and thereby a heat of the compressor body is hardly transmitted to the hollow orbiting shaft 130 , so that the hollow orbiting shaft 130 is not deformed by such heat.
  • each lap of the stationary scroll 122 and the orbiting scroll 135 may avoid conflicting with each other, and thereby the orbiting scroll 122 and the stationary scroll 135 may be prevented from being damaged.
  • the Oldham's ring 137 is provided between the bearing support 127 and the hollow orbiting plate 136 , the Oldham's ring 137 does not be increased in the temperature even in the temperature raise of the orbiting scroll 135 . Thus, longer life of the Oldham's ring 137 may be achieved. Less thermal expansion of the Oldham's ring 137 also provides its stable efficiency.
  • FIG. 9 is a schematic sectional view showing a scroll compressor according to the fifth embodiment of the present invention.
  • a stationary scroll 151 is fixed to the casing 121 , and the stationary scroll 151 is provided with a spiral lap.
  • An orbiting scroll 153 is mounted to the mounting portion 152 of the mounting member 133 .
  • the orbiting scroll 153 is provided with a lap formed in the same configuration as that of the stationary scroll 151 .
  • Respective laps of the orbiting scroll 153 and the stationary scroll 151 are overlappedly engaged with each other to form a plurality of compression chambers.
  • a compressor body comprises the stationary scroll 151 and the orbiting scroll 153 , and this compressor body is located inside the rotor 124 and the hollow orbiting shaft 130 .
  • a suction pipe 154 is connected to the stationary scroll 151
  • a discharge pipe 155 is connected to the stationary scroll 151 .
  • the suction pipe 154 and the discharge pipe 155 communicate with the compression chambers.
  • a gas to be compressed is sucked from the suction pipe 142 , and compressed in the compression chambers, whereafter the gas is discharged from the discharge pipe 143 .
  • the gas to be compressed is sucked from the suction pipe 154 , and compressed in the compressed chambers, whereafter the gas is discharged from the discharge pipe 155 .
  • the gas to be compressed may be compressed by two compressor bodies; one compressor body comprising the stationary scroll 122 and the orbiting scroll 135 , and another compressor body comprising the stationary scroll 151 and the orbiting scroll 153 .
  • the mounting portions 134 and 152 may be shortened, and thereby higher torsional rigidity of the mounting portions 134 and 152 and less buckling deformation may be achieved. This allows various compressor bodies to be mounted to the mounting portions 134 and 152 .
  • the scroll compressor may assure a substantially constant performance regardless of the temperature, and it may be used in either of the cold and hot areas in case of applied as a compressor for air conditioners.
  • FIG. 10 is a schematic sectional view showing a scroll compressor according to the sixth embodiment of the present invention
  • FIG. 11 is a sectional view taken along the line D-D of FIG. 10.
  • a stationary scroll being a part of a compressor body 162 is fixed to a casing 161 .
  • a stator 163 is fixed to the casing 161
  • a bearing support 164 is fixed to the casing 161 .
  • a rotary shaft 166 is rotatably supported by a bearing support 164 through a bearing 165
  • a rotor 168 is fixed to the rotary shaft 166 through a coupling disk 167 .
  • a motor comprises the stator 163 and the rotor 168 .
  • an orbiting shaft 170 is rotatably supported by the rotary shaft 166 through a bearing 169 . Respective axes of the rotary shaft 166 and the orbiting shaft 170 are eccentrically arranged each other. Thus, the orbiting shaft 170 is eccentrically and rotatably supported by the orbiting shaft 170 .
  • An orbiting scroll being a part of the compressor body 162 is mounted to the end portion of the orbiting shaft 170 , and the compressor body 162 is located inside the rotor 168 .
  • a support member 171 is fixed to the casing 161 .
  • a movable plate 172 is supported by the support member 171 so as to be movable in the longitudinal direction on the sheet of FIG. 11.
  • the movable plate 172 is formed with a rectangular opening 173 having a longitudinal direction orthogonal to the moving direction of the movable plate 172 . Specifically, this longitudinal direction of the rectangular opening 173 corresponds to the lateral direction on the sheet of FIG. 11.
  • Notched surfaces 174 are provided on both sides of the center portion of the orbiting shaft 170 .
  • the notched surfaces 174 are arranged in parallel with the axis of the orbiting shaft 170 , and the notched surfaces 174 are also arranged in parallel with each other.
  • the notched surfaces 174 are engaged with the peripheral surface of the opening 173 extending in the width direction of the opening 173 .
  • this width direction of the opening 173 corresponds to a direction perpendicular to the longitudinal direction on the sheet of FIG. 11.
  • This construction including the support member 171 and the movable plate 172 provides an anti-self-rotation device which allows the orbiting shaft 170 to be eccentrically orbited and prevents the self-rotation of the orbiting shaft 170 . That is, the support member 171 as the stationary portion of the anti-self-rotation device is fixed to the casing 161 , and the movable plate 172 as the movable portion of the anti-self-rotation device are engaged with the notched surfaces 174 as a portion of the orbiting shaft.
  • the eccentric-rotation driving unit comprises the casing 161 , the motor, the rotary shaft 166 , the orbiting shaft 170 , and the anti-self-rotation device.
  • the compressor body 162 is located inside the rotor 168 so that the dimension in the axial direction of the rotary shaft 166 , i.e. in the longitudinal direction on the sheet of FIG. 10, may be shorten. Further, the diameter of the orbiting shaft 170 may be increased without increasing the outside dimension of the scroll compressor unit, and thereby higher rigidity of the orbiting shaft 170 and less deformation of the orbiting shaft 170 may be achieved. Thus, each lap of the orbiting scroll and stationary scroll in the compressor body 162 may avoid conflicting with each other, and thereby the orbiting scroll and stationary scroll in the compressor body 162 may be prevented from being damaged. Further, since the anti-self-rotation device is obtained only by providing the opening 173 in the movable plate 172 and providing the notched surfaces 174 in both sides of the bottom of the orbiting shaft 170 , simpler structure and lower manufacturing cost may be achieved.
  • the motor including the stator 123 and the rotor 124 is used as a driving device for rotatably driving the rotary shaft 125 .
  • a belt-type driving device may be applied as the driving device for rotatably driving the rotary shaft.
  • the hollow orbiting plate 136 is fixed at the lower portion of the hollow orbiting shaft 130 in the above embodiments, the hollow orbiting plate 136 may be fixed to any other portion of the hollow orbiting shaft 130 .
  • the coupling disk 167 is used as a coupling member in the above embodiments, a plurality of coupling rods may be applied as coupling members.
  • the orbiting scrolls 135 and 153 are mounted to the mounting member 133 .
  • the orbiting scroll may be mounted directly to the hollow orbiting shaft.
  • the thermal deformation of the compressor body may be reduced.
  • the interference between respective laps of the orbiting scroll and stationary scroll in the compressor body and resulting damage of the laps of the orbiting scroll and the stationary scroll in the compressor body may further be prevented.
  • locating the compressor body inside the orbiting shaft allows the dimension in the axial direction of the rotary shaft to be effectively shortened. Further, locating the compressor body inside the rotor allows the dimension in the axial direction of the rotary shaft to be shortened.
  • FIG. 12 is a sectional view showing an overall structure of one example of a scroll-type pressure transformer according to the present invention
  • FIGS. 13 and 14 are exploded views thereof.
  • This scroll-type pressure transformer comprises a driving unit, a scroll device and a casing to couple them.
  • the driving unit comprises a motor 301 , an orbiting shaft 303 located in a rotary shaft 302 of the motor 301 , an anti-self-rotation mechanism 304 of the orbiting shaft 303 , and a casing 306 for fixing the motor 301 .
  • the motor 301 comprises a stator 301 a fixed to the casing 306 , a rotary shaft 302 rotatable in a space of the stator 301 a and having an eccentric axial hollow portion therein, and a rotor 301 b fixed to the rotary shaft 302 and facing to the stator 301 a with a small gap therebetween.
  • Bearings 302 a and 302 b are provided on both ends of the hollow portion within the rotary shaft 302 , and the orbiting shaft 303 is relatively rotatably supported through the bearings 302 a and 302 b .
  • the shaft center of the orbiting shaft 303 is arranged eccentrically to the shaft center of the rotary shaft 302 .
  • the orbiting shaft 303 is orbited along the circumference having a radius R corresponding to the distance R between the both shaft centers.
  • the anti-self-rotation mechanism 304 includes an Oldham's ring 444 having a pair of first protrusions 441 , 441 provided along a diagonal line on one side of the Oldham's ring 444 and a pair of second protrusions 442 , 442 provided along a diagonal line orthogonal to the above diagonal line on the other side of the Oldham's ring 444 .
  • An orbiting plate 446 fixed to the orbiting shaft 303 has, on the inner surface thereof, a pair of radial grooves (not shown) which allows the first protrusions 441 of the Oldham's ring 444 to be moved therein.
  • the outer surface of the casing 306 is formed with a pair of radial grooves 448 which allows the second protrusions 442 of the Oldham's ring 444 to be moved therein.
  • the Oldham's ring 444 is restrained by the radial grooves (not shown) of the orbiting plate 446 and the radial grooves 448 of the casing 306 so that the orbiting shaft 303 may be orbited without its self-rotation.
  • a protrusion 345 of a stationary scroll member 342 located on the side of the motor is formed with an opening 347 a having a bearing 345 a coaxial with the rotary shaft 302 to rotatably bear the rotary shaft 302 , and a through hole 347 b coaxial with the rotary shaft 302 and having an inner diameter slightly larger than the orbiting diameter of the orbiting shaft 303 .
  • the protrusion 345 of the stationary scroll member 342 is fixed to the casing 306 of the motor 301 by a screw or the like.
  • the other stationary scroll member 340 includes, on the inner surface thereof, a scroll 340 a having the same configuration as that of the scroll 342 a of the stationary scroll member 342 .
  • the stationary scroll member 340 also has a recessed portion 340 b rotatably bearing the top portion of the orbiting shaft 303 at a position corresponding to a through hole 344 a of an orbiting scroll member 344 .
  • the orbiting scroll member 344 has spiral scrolls 349 a and 349 b on both sides thereof, and a sleeve 344 b at its approximate center thereof.
  • the sleeve 344 b is fastened to the orbiting shaft 303 by a screw, lock or the like.
  • Each scroll space has a low-pressure area in the outward portion thereof and has a high-pressure area at the center portion thereof. Since the configuration and operation of the scroll are known, their description will be omitted.
  • a through hole 344 d is formed in a disk-shaped base plate 344 c of the orbiting scroll member 344 in the high-pressure area to communicate the scroll spaces on both sides respectively.
  • a vent passage communicating with the low-pressure area of the scroll spaces operates as an inlet port 320
  • a vent passage communicating with the high-pressure area of the scroll spaces operates as a discharge port 322 .
  • the scroll-type pressure transformer shown in FIGS. 12 to 14 may function as a scroll vacuum pump.
  • FIG. 15 is a sectional view showing an overall structure of another example of a scroll-type pressure transformer according to the present invention having scroll spaces on both sides thereof, wherein the orbiting scroll member 344 fastened to the orbiting shaft 303 is slidably in the axial direction.
  • the same elements as those of the scroll-type pressure transformer in FIGS. 12 to 14 are defined by the same reference numbers.
  • the pressure transformer for example, is operated under an adequate difference in gas pressure by arranging a gas pressure in the upper scroll space higher than a gas pressure in the lower scroll space.
  • an excessive thrust force may load to the bearing 302 b of the orbiting shaft 303 .
  • the orbiting scroll member 344 is engaged with the orbiting shaft 303 slidably in the axial direction by, for example, key or P-profile and fastened by a spring 350 and a screw 351 thereto.
  • the above excessive thrust force is absorbed by the spring 350 so that the thrust force on the bearing 302 b of the orbiting shaft 303 may be reduced.
  • the bearing of the orbiting scroll member is not required to have an excessively high strength and thereby its cost may be reduced.
  • the anti-self-rotation mechanism is not limited to the Oldham's ring and a crankshaft type anti-self-rotation mechanism as shown in FIG. 18 may be applied.
  • the anti-self-rotation mechanism is not essentially required to mount to the orbiting shaft in the position outside the motor farthest from the scroll as shown in FIGS. 12 and 13, and it may be provided outside the scroll as shown in FIG. 15, or halfway between the motor and the scroll.
  • the orbiting shaft is not essentially required to penetrate the rotary shaft, and a commercially available motor, for example, may be applied and an orbiting shaft may be rotatably mounted within the hollow portion of the rotary shaft coupled to the rotary shaft of the motor.
  • the orbiting scroll member is directly fastened or fastened slidably to the orbiting shaft which is orbited without any self-rotation by the anti-self-rotation mechanism provided between the orbiting plate mounted to the orbiting shaft and the casing.
  • the overall device may be simplified in structure, and its cost may be reduced.
  • the complicated mechanism is not required for the anti-self-rotation mechanism of the orbiting shaft, and the deformation of the orbiting scroll member due to the thermal expansion or the vibration may be reduced.
  • the orbiting scroll member may be orbited precisely, and the durability and quietness of the device may be enhanced.

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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)
US09/835,497 2000-04-19 2001-04-17 Scroll compressor and scroll-type pressure transformer Abandoned US20010033801A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/162,582 US20020150491A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,600 US20020150492A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,984 US20020141892A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000-118467 2000-04-19
JP2000118467A JP3533143B2 (ja) 2000-04-19 2000-04-19 スクロール型変圧装置
JP2000123920A JP3540244B2 (ja) 2000-04-25 2000-04-25 スクロール圧縮機
JP2000208326A JP3430128B2 (ja) 2000-07-10 2000-07-10 スクロール圧縮機

Related Child Applications (3)

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US10/162,984 Division US20020141892A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,600 Division US20020150492A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,582 Division US20020150491A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer

Publications (1)

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US20010033801A1 true US20010033801A1 (en) 2001-10-25

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US09/835,497 Abandoned US20010033801A1 (en) 2000-04-19 2001-04-17 Scroll compressor and scroll-type pressure transformer
US10/162,600 Abandoned US20020150492A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,984 Abandoned US20020141892A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,582 Abandoned US20020150491A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer

Family Applications After (3)

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US10/162,600 Abandoned US20020150492A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,984 Abandoned US20020141892A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer
US10/162,582 Abandoned US20020150491A1 (en) 2000-04-19 2002-06-06 Scroll compressor and scroll-type pressure transformer

Country Status (3)

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US (4) US20010033801A1 (fr)
EP (1) EP1148246A3 (fr)
KR (1) KR20010098641A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100449149C (zh) * 2005-07-04 2009-01-07 俞度立 微加工涡卷式压缩机和相关技术
US20090297381A1 (en) * 2008-06-03 2009-12-03 Richstone Limited Scroll fluid machine
US20120034562A1 (en) * 2001-09-26 2012-02-09 Wayton Gerald B Coating composition for use with an overcoated photoresist
US20140024344A1 (en) * 2011-04-05 2014-01-23 Ntt Docomo, Inc. Mobile communication method, radio base station, mobile management node, and mobile station
DE102015220132A1 (de) * 2015-10-15 2017-04-20 Handtmann Systemtechnik Gmbh & Co. Kg Verdichtereinrichtung, Antriebsvorrichtung, Kraftfahrzeug
US12025126B2 (en) 2021-12-16 2024-07-02 Samsung Electronics Co., Ltd. Scroll compressor and home appliance including the same

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JP4821612B2 (ja) * 2004-12-22 2011-11-24 三菱電機株式会社 スクロール圧縮機
EP1818540B1 (fr) * 2004-12-22 2011-06-08 Mitsubishi Denki Kabushiki Kaisha Compresseur a spirales
WO2010070757A1 (fr) * 2008-12-18 2010-06-24 リッチストーンリミテッド Machine hydraulique à spirale
BRPI0905651B1 (pt) 2009-11-03 2020-03-10 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda Arranjo de montagem de eixo excêntrico em bloco de compressor de refrigeração
CN104500395B (zh) * 2014-12-12 2016-08-17 沙无埃 涡旋压缩机
CN106151294B (zh) * 2016-07-22 2019-01-22 珠海凌达压缩机有限公司 转轴支撑结构和压缩机

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120034562A1 (en) * 2001-09-26 2012-02-09 Wayton Gerald B Coating composition for use with an overcoated photoresist
US8927681B2 (en) * 2001-09-26 2015-01-06 Rohm And Haas Electronic Materials Llc Coating composition for use with an overcoated photoresist
CN100449149C (zh) * 2005-07-04 2009-01-07 俞度立 微加工涡卷式压缩机和相关技术
US20090297381A1 (en) * 2008-06-03 2009-12-03 Richstone Limited Scroll fluid machine
US8371834B2 (en) * 2008-06-03 2013-02-12 Richstone Limited Anti-self rotation mechanism of a scroll fluid machine
US20140024344A1 (en) * 2011-04-05 2014-01-23 Ntt Docomo, Inc. Mobile communication method, radio base station, mobile management node, and mobile station
DE102015220132A1 (de) * 2015-10-15 2017-04-20 Handtmann Systemtechnik Gmbh & Co. Kg Verdichtereinrichtung, Antriebsvorrichtung, Kraftfahrzeug
US12025126B2 (en) 2021-12-16 2024-07-02 Samsung Electronics Co., Ltd. Scroll compressor and home appliance including the same

Also Published As

Publication number Publication date
US20020150491A1 (en) 2002-10-17
US20020141892A1 (en) 2002-10-03
EP1148246A2 (fr) 2001-10-24
US20020150492A1 (en) 2002-10-17
KR20010098641A (ko) 2001-11-08
EP1148246A3 (fr) 2002-11-20

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