US20150033744A1 - Fluid Machine - Google Patents
Fluid Machine Download PDFInfo
- Publication number
- US20150033744A1 US20150033744A1 US14/385,454 US201314385454A US2015033744A1 US 20150033744 A1 US20150033744 A1 US 20150033744A1 US 201314385454 A US201314385454 A US 201314385454A US 2015033744 A1 US2015033744 A1 US 2015033744A1
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- US
- United States
- Prior art keywords
- section
- bypass passage
- working fluid
- bypass
- suction port
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
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- 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
- F01C1/00—Rotary-piston machines or engines
- F01C1/02—Rotary-piston machines or engines 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
- F01C1/0207—Rotary-piston machines or engines 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
- F01C1/0215—Rotary-piston machines or engines 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
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- 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
- F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
- F01C20/24—Control of, monitoring of, or safety arrangements for, machines or engines characterised by using valves for controlling pressure or flow rate, e.g. discharge valves
- F01C20/26—Control of, monitoring of, or safety arrangements for, machines or engines characterised by using valves for controlling pressure or flow rate, e.g. discharge valves using bypass channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K15/00—Adaptations of plants for special use
- F01K15/02—Adaptations of plants for special use for driving vehicles, e.g. locomotives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
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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
- F04C2210/00—Fluid
- F04C2210/22—Fluid gaseous, i.e. compressible
- F04C2210/228—Vapour
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a fluid machine which is driven by a working fluid suctioned from a suction port and discharges the working fluid to a discharge port.
- Patent Document 1 discloses a fluid machine which integrally includes a bypass passage that guides a working fluid suctioned from a suction port to a discharge port while allowing the working fluid to bypass a driving section, and a valve mechanism that opens and closes the bypass passage.
- bypass passage and the valve mechanism that opens and closes the bypass passage are provided, there may be cases in which complex processes need to be performed on the casing or housing included in the fluid machine or the axial length of the fluid machine is increased.
- the fluid machine of Patent Document 1 has a configuration in which the bypass passage is opened and closed by controlling the back pressure of a valve body using a solenoid valve in the valve mechanism. Therefore, an accommodating space of the solenoid valve, a back pressure chamber, a passage for communicating the back pressure chamber (high pressure chamber) and a low pressure chamber with each other, and the like need to be formed in the casing or the housing, and thus the processes may become complex.
- the high pressure chamber, into which the working fluid flows is provided on the back surface side of a fixed scroll, and the solenoid valve, the back pressure chamber, and the like are arranged on the outside of the high pressure chamber, resulting in an increase in axial length of the fluid machine.
- An object of the invention is to provide a fluid machine capable of integrally including a bypass passage and a valve mechanism which opens and closes the bypass passage while preventing processes from becoming complex and reducing an increase in axial length of the fluid machine.
- a fluid machine includes: a suction port into which a working fluid that becomes a heated vapor and has a high pressure flows; a casing section including the suction port; a driving section which is driven by expansion of the working fluid suctioned from the suction port; a discharge port from which the working fluid that has passed through the driving section and has a low pressure flows; and a housing section including the discharge port, in which a bypass section, in which a bypass passage that guides the working fluid suctioned from the suction port to the discharge port while allowing the working fluid to bypass the driving section is formed and a valve mechanism that opens and closes the bypass passage is included, is supported between the casing section and the housing section.
- the bypass passage and the valve mechanism which opens and closes the bypass passage can be provided with a simple structure. Therefore, processing of the fluid machine can be simple and a reduction in the size of the fluid machine can be achieved.
- FIG. 1 is a diagram illustrating the schematic configuration of a waste-heat reusing apparatus in an embodiment of the invention.
- FIG. 2 is a cross-sectional view illustrating a pump-integrated expander incorporated in the waste-heat reusing apparatus.
- FIG. 3 is a partial enlarged cross-sectional view illustrating a bypass section included in the pump-integrated expander.
- FIG. 4 is a cross-sectional view illustrating another example of the pump-integrated expander incorporated in the waste-heat reusing apparatus.
- FIG. 1 illustrates a waste-heat reusing apparatus 1 A for a vehicle, in which an expander as a fluid machine is incorporated.
- the waste-heat reusing apparatus 1 A is an apparatus that is mounted in the vehicle along with an engine 10 and recovers waste heat of the engine 10 for use.
- the waste-heat reusing apparatus 1 A includes a Rankine cycle device 2 A, a transmission mechanism 3 which transmits the output of the Rankine cycle device 2 A to the engine 10 , and a control unit 4 .
- the engine 10 is an internal combustion engine provided with a water-cooling type cooling device, and the cooling device includes a coolant circulation passage 11 through which a coolant is circulated.
- An evaporator 22 of the Rankine cycle device 2 A is disposed in the coolant circulation passage 11 so that the coolant that absorbs heat from the engine 10 is returned to the engine 10 after passing through the evaporator 22 .
- the Rankine cycle device 2 A recovers the waste heat of the engine 10 from the coolant of the engine 10 and converts the recovered heat into driving force so as to be output.
- the Rankine cycle device 2 A includes a circulation passage 21 through which a working fluid is circulated, and in the circulation passage 21 , the evaporator 22 , the expander 23 , a condenser 24 , and a pump 25 A are arranged in this order along the flow direction of the working fluid.
- the working fluid for example, a substance which includes a fluorocarbon skeleton as a base is used.
- a lubricating oil circulates along with the working fluid and has functions of lubricating, sealing, cooling, and the like in sliding sections of the expander 23 and the pump 25 A.
- the evaporator 22 allows heat transfer between the high-temperature coolant that has absorbed heat from the engine 10 and the working fluid of the Rankine cycle device 2 A so that the working fluid is heated and evaporated (vaporized).
- the expander 23 (fluid machine) is a device which generates driving force by expanding the working fluid that has a high temperature and a high pressure through the vaporization in the evaporator 22 , and uses, as an example, a scroll type expander.
- the condenser 24 allows heat exchange between the low pressure working fluid that has passed through the expander 23 and the outside air to cool the working fluid so as to be condensed (liquefied).
- the pump 25 A is a mechanical pump and forcibly feeds the working fluid liquefied in the condenser 24 to the evaporator 22 .
- the working fluid circulates through the circulation passage 21 while repeating vaporization, expansion, and condensation.
- the expander 23 and the pump 25 A are connected by a rotating shaft 28 to be integrated, thereby providing a pump-integrated expander 29 A (fluid machine). That is, the rotating shaft 28 of the pump-integrated expander 29 A functions as the output shaft of the expander 23 and functions as the driving shaft of the pump 25 A.
- the Rankine cycle device 2 A is first started up by driving the pump 25 A by the output of the engine 10 , and thereafter, when the expander 23 generates sufficient driving force, the driving force of the expander 23 drives the pump 25 A.
- the transmission mechanism 3 transmits the torque (axial torque) of the pump-integrated expander 29 A, which is the output of the Rankine cycle device 2 A, to the engine 10 and transmits the output torque of the engine 10 to the pump-integrated expander 29 A (pump unit) during start-up of the Rankine cycle device 2 A.
- the transmission mechanism 3 includes a pulley 31 attached to the rotating shaft 28 of the pump-integrated expander 29 A, a crank pulley 32 attached to a crankshaft 10 a of the engine 10 , a belt 33 wound around the pulley 31 and the crank pulley 32 , and an electromagnetic clutch 34 provided between the rotating shaft 28 of the pump-integrated expander 29 A and the pulley 31 .
- the control unit 4 having a microcomputer has a function of controlling the electromagnetic clutch 34 , and controls an operation and a stop of the Rankine cycle device 2 A through the on and off control of the electromagnetic clutch 34 .
- the electromagnetic clutch 34 is engaged (turned on) and the pump 25 A is operated by the engine 10 to start the circulation of the working fluid (refrigerant), thereby starting up the Rankine cycle device 2 A.
- the expander 23 When the expander 23 is activated and starts to generate a driving force, a part of the driving force generated by the expander 23 is used to drive the pump 25 A, and the remaining driving force is transmitted to the engine 10 via the transmission mechanism 3 to assist the output (driving force) of the engine 10 .
- control unit 4 disengages (turns off) the electromagnetic clutch 34 to stop the circulation of the working fluid, thereby stopping the Rankine cycle device 2 A.
- the evaporator 22 may also act as a device that allows heat exchange between the working fluid of the Rankine cycle device 2 A and exhaust air of the engine 10 or may also act as a device that allows heat exchange with the coolant of the engine 10 and allows heat exchange with exhaust of the engine 10 .
- the expander 23 integrally includes a bypass passage 81 for circulating the working fluid to bypass scrolls provided as a driving portion and a valve mechanism 83 for opening and closing the bypass passage 81 .
- control unit 4 controls the valve mechanism 83 to be opened so as to open the bypass passage 81 immediately after the start-up of the Rankine cycle device 2 A at which the electromagnetic clutch 34 is engaged so that the working fluid is circulated while bypassing the scrolls of the expander 23 .
- the control unit 4 controls the valve mechanism 83 to be closed to close the bypass passage 81 , to thereby perform a changeover to a state in which the working fluid is circulated while passing through the scrolls of the expander 23 .
- the start-up performance of the Rankine cycle device 2 A can be improved.
- the bypass passage 81 is opened so as to prevent high-speed rotations due to the residual pressure.
- the pump-integrated expander 29 A is a fluid machine in which the pump 25 A that circulates the working fluid of the Rankine cycle device 2 A and the expander 23 that generates rotational driving force through the expansion of the working fluid heated and vaporized in the evaporator 22 are driven by the common rotating shaft 28 , and includes the pulley 31 and the electromagnetic clutch 34 included in the transmission mechanism 3 .
- the expander 23 of the pump-integrated expander 29 A includes a fixed scroll 51 which is disposed in one end portion of the pump-integrated expander 29 A in the axial direction, an orbiting scroll (rotating body) 52 assembled to be eccentrically engaged with the fixed scroll 51 , a housing section 54 provided with a discharge port 53 , and a casing section 56 provided with a suction port 55 .
- the fixed scroll 51 includes a disc-like body portion 51 a , a scroll portion (spiral body) 51 b uprightly provided on one end surface of the body portion 51 a in a rib shape, and an introduction port 51 c for the working fluid, which is formed to penetrate through the center of the body portion 51 a.
- the housing section 54 is formed in a cylindrical shape with both ends opened, and includes a first hollow portion 54 a into which the casing section 56 is fitted and which accommodates the fixed scroll 51 and the orbiting scroll 52 , a second hollow portion 54 b which supports a large-diameter portion 64 included in a driven crank mechanism between the orbiting scroll 52 and the rotating shaft 28 , and a third hollow portion 54 c which supports the rotating shaft 28 .
- the discharge port 53 which allows the internal space (discharge side space of the scrolls) of the first hollow portion 54 a to communicate with the external space is formed along the radial direction of the rotating shaft 28 .
- the casing section 56 includes a cylindrical portion 56 a which is provided integrally with the fixed scroll 51 on the inside and of which the outside is fitted into the first hollow portion 54 a , and a working fluid introduction chamber 56 b which communicates with the introduction port 51 c of the fixed scroll 51 .
- the suction port 55 which allows the working fluid introduction chamber 56 b to communicate with the external space of the casing section 56 is formed along the radial direction of the rotating shaft 28 .
- discharge port 53 and the suction port 55 are substantially parallel to each other, extend in a direction at the same angle from the axis of the rotating shaft 28 , and are arranged in the axial direction of the rotating shaft 28 .
- one end of a pipe is connected to the outlet of the evaporator 22 , so that the working fluid heated in the evaporator 22 is introduced into the expander 23 via the suction port 55 .
- the working fluid introduced into the suction port 55 flows into the working fluid introduction chamber 56 b and thereafter is introduced to the center portion of the fixed scroll 51 via the introduction port 51 c.
- the working fluid introduced to the center portion of the fixed scroll 51 presses the wall surface of the orbiting scroll 52 to form an expansion chamber, and as the working fluid is continuously supplied, the expansion chamber moves to the outer circumferential side, which causes orbiting motion of the orbiting scroll 52 .
- one end of a pipe is connected to the inlet of the condenser 24 , so that the working fluid which passes through the expander 23 is sent to the condenser 24 to be condensed (liquefied).
- the orbiting scroll 52 includes a disc-like body portion 52 a and a scroll portion (spiral body) 52 b uprightly provided on one end surface of the body portion 52 a in a rib shape.
- an anti-rotation mechanism 60 is provided between the surface of the body portion 52 a on the opposite side to the end surface thereof in which the scroll portion 52 b is formed, and a stepped portion 54 d which reaches the second hollow portion 54 b from the first hollow portion 54 a of the housing section 54 so that the orbiting scroll 52 makes orbiting motion as the working fluid expands while being prevented from rotating by the anti-rotation mechanism 60 .
- the anti-rotation mechanism 60 there are an Oldham coupling, a pin and ring coupling, a ball coupling, and the like.
- a ball coupling which uses balls as rolling elements is used, and particularly, a ball coupling called an EM coupling (refer to “EM coupling for Scroll Compressors” in NTN TECHNICAL REVIEW No. 68 (2000)) is used.
- the EM coupling is constituted by two plates made by integrally press-forming the race and the ring, steel balls (balls), and the like.
- a cylindrical portion 52 c protrudes from the end surface of the body portion 52 a of the orbiting scroll 52 on the anti-rotation mechanism 60 side, and a drive bearing 61 is provided on the inside of the cylindrical portion 52 c .
- An eccentric bush 62 is fitted into the drive bearing 61 , and a crankpin hole 62 a is formed in the eccentric bush 62 .
- the large-diameter portion 64 is rotatably supported by the second hollow portion 54 b of the housing section 54 via a bearing 63 , and a crankpin 64 a is uprightly provided on the large-diameter portion 64 so that the crankpin 64 a is parallel to the rotating shaft 28 and has an axial center shifted from the rotating shaft 28 .
- the crankpin 64 a is inserted into the crankpin hole 62 a of the eccentric bush 62 .
- the rotating shaft 28 is connected to the large-diameter portion 64 so that the orbiting motion of the orbiting scroll 52 around the rotating shaft 28 is transmitted as the rotational driving force of the rotating shaft 28 by the driven crank mechanism constituted by the eccentric bush 62 , the crankpin 64 a , and the large-diameter portion 64 .
- a counterweight (balancing weight) 74 for reducing occurrence of vibrations of the expander 23 is attached to the eccentric bush 62 .
- a restriction hole 64 b is provided in the large-diameter portion 64 , and a restriction protrusion 62 b fitted into the restriction hole 64 b is provided in the eccentric bush 62 . Therefore, the oscillation of the eccentric bush 62 around the crankpin 64 a is restricted by the engagement between the restriction hole 64 b and the restriction protrusion 62 b.
- the rotating shaft 28 is supported by a bearing 65 provided in the third hollow portion 54 c of the housing section 54 and is supported by a bearing 67 provided in the end portion of a pump housing 66 connected to the housing section 54 so as to rotate.
- the pump 25 A is provided in the pump housing 66 .
- the pump 25 A is, as an example, a gear pump, and the gear pump is constituted by a driving gear (rotating body) that is axially supported by the rotating shaft 28 , a driven shaft that is rotatably supported in parallel to the rotating shaft 28 , and a driven gear that is axially supported by the driven shaft and is engaged with the driving gear.
- a pump suction port 66 a which communicates with the suction port of the pump 25 A, and a pump discharge port 66 b which communicates with the discharge port of the pump 25 A are formed.
- one end of a pipe is connected to the outlet of the condenser 24 , so that the working fluid condensed (liquefied) in the condenser 24 is suctioned into the pump 25 A.
- one end of a pipe is connected so that the working fluid condensed (liquefied) in the condenser 24 is forcibly fed to the evaporator 22 to be evaporated (vaporized).
- a well-known pump may be appropriately employed, and other than the gear pump, a vane pump or the like may be used.
- the pulley 31 and the electromagnetic clutch 34 included in the transmission mechanism 3 are disposed.
- a cylindrical portion 66 c in which the rotating shaft 28 is positioned is formed integrally with the end surface of the pump housing 66 on the opposite side to the expander 23 side.
- the bearing 67 which supports the rotating shaft 28 is disposed on the front end side of the inside of the cylindrical portion 66 c , and a shaft seal 68 is disposed on the bottom portion side (the expander 23 side) of the cylindrical portion 66 c.
- a clutch plate 71 is attached to the front end of the rotating shaft 28 that protrudes from the cylindrical portion 66 c , and the pulley 31 is rotatably attached to the outer circumference of the cylindrical portion 66 c via a bearing 72 .
- a clutch coil 73 is accommodated in an annular groove 31 a that is formed in the end surface of the pulley 31 on the expander 23 side and is centered on the rotating shaft 28 , and the electromagnetic clutch 34 is constituted by the clutch plate 71 and the clutch coil 73 .
- the expander 23 of the pump-integrated expander 29 A further includes a bypass section 80 for guiding the working fluid suctioned from the suction port 55 to the discharge port 53 while allowing the working fluid to bypass the driving section including the fixed scroll 51 and the orbiting scroll 52 .
- the bypass section 80 includes a holder 82 in which the bypass passage 81 is formed, and the valve mechanism (solenoid valve) 83 which is supported by the holder 82 and opens and closes the bypass passage 81 , and is supported between the casing section 56 provided with the suction port 55 and the housing section 54 provided with the discharge port 53 .
- the valve mechanism solenoid valve
- valve mechanism 83 is a solenoid valve having a coil 83 d .
- a shim 96 is fixed between the holder 82 and the casing section 56 and between the housing section 54 and the casing section 56 .
- bypass section 80 details of the bypass section 80 will be described with reference to FIG. 3 .
- the holder 82 includes a front end portion 82 a in which the bypass passage 81 is formed and a base end portion 82 b which holds the coil of the valve mechanism 83 and the like, and the front end portion 82 a is supposed between the casing section 56 and the housing section 54 in the axial direction of the rotating shaft 28 .
- An accommodation space 91 for supporting the front end portion 82 a of the holder 82 is provided between a part in which the suction port 55 of the casing section 56 is formed and a part in which the discharge port 53 of the housing section 54 is formed.
- the accommodation space 91 is a space which is surrounded by the casing section 56 and the housing section 54 with a bottom and is open to the radially outer side of the rotating shaft 28 .
- a suction side communication passage 92 which communicates with the suction port 55 is open to the surface of the accommodation space 91 that is on the casing section 56 side and configured to support the front end portion 82 a of the holder 82 in the axial direction.
- a discharge side communication passage 93 which communicates with the discharge port 53 is open to the surface of the accommodation space 91 that is on the housing section 54 side and configured to support the front end portion 82 a in the axial direction.
- bypass passage 81 which extends in the axial direction of the rotating shaft 28 is formed in the front end portion 82 a of the holder 82 , and in a state in which the front end portion 82 a is supported between the casing section 56 and the housing section 54 in the axial direction of the rotating shaft 28 , one end of the bypass passage 81 is connected to the suction side communication passage 92 and the other end of the bypass passage 81 is connected to the discharge side communication passage 93 , thereby forming a bypass passage of the working fluid.
- bypass section 80 (holder 82 ) is disposed between the suction port 55 and the discharge port 53 so that the suction port 55 and the discharge port 53 directly communicate with each other through the bypass passage 81 formed in the holder 82 .
- a part of the holder 82 in which the end portion of the bypass passage 81 on the casing section 56 side is open forms a cylindrical protrusion 82 c which protrudes in a cylindrical shape along the direction parallel to the axis of the rotating shaft 28 , and the bypass passage 81 extends in the axial center of the cylindrical protrusion 82 c.
- the suction side communication passage 92 has a fitting hole (enlarged diameter portion) 92 a having a diameter into which the cylindrical protrusion 82 c is fitted, on the holder 82 side (the housing section 54 side). That is, the suction side communication passage 92 is formed to have substantially the same diameter as the bypass passage 81 from the suction port 55 side and in the middle of the passage, the diameter thereof is enlarged to a diameter into which the outer circumference of the cylindrical protrusion 82 c is fitted.
- annular groove 82 f is formed in the outer circumference of the cylindrical protrusion 82 c and a seal member (O-ring) 94 formed of an elastic material such as rubber in an annular shape is fitted into the annular groove 82 f .
- a seal member (O-ring) 94 formed of an elastic material such as rubber in an annular shape is fitted into the annular groove 82 f .
- the bypass passage 81 is allowed to communicate with the suction port 55 , and the position of the holder 82 in the radial direction of the rotating shaft 28 is determined with respect to the suction side communication passage 92 so that the gap between the cylindrical protrusion 82 c of the holder 82 and the fitting hole 92 a of the casing section 56 , in other words, the suction port 55 side of the bypass passage 81 , is sealed by the cylindrical seal.
- Abutment between the holder 82 and the casing section 56 in the axial direction of the rotating shaft 28 is performed between a flat surface portion 82 e of the root portion of the cylindrical protrusion 82 c and a flat surface portion 56 c of the casing section 56 in which the suction side communication passage 92 is open.
- the shim 96 which is a fitting strip made of, for example, metal is fixed. By the shim, the gap between the fixed scroll 51 and the orbiting scroll 52 in the axial direction of the rotating shaft 28 is adjusted.
- the bypass passage 81 on the holder 82 side and the discharge side communication passage 93 on the housing section 54 side communicate with each other, and the bypass passage 81 is connected to the discharge port 53 via the discharge side communication passage 93 .
- bypass passage 81 is formed from the front end of the cylindrical protrusion 82 c to the base portion 82 g (flat surface portion), and by supporting the holder 82 between the housing section 54 and the casing section 56 , the suction port 55 and the discharge port 53 are allowed to communicate with each other by the bypass passage 81 .
- An annular groove 54 f is formed in the bottom surface of the recessed portion 54 e so as to surround the opening of the discharge side communication passage 93 , and a seal member 95 formed of an elastic material such as rubber is fitted into the groove 54 f so that the abutment surface between the holder 82 and the housing section 54 is surrounded and sealed by the seal member 95 . That is, the periphery of the connection portion between the bypass passage 81 on the holder 82 side and the discharge side communication passage 93 on the housing section 54 side is sealed by a flat seal. In other words, the bypass passage 81 and the discharge port 53 are sealed by the flat seal.
- the seal member 95 generates a force to bias the holder 82 toward the casing section 56 side by being compressed by the holder 82 , and accordingly, the holder 82 abuts on the casing section 56 side and the position of the holder 82 in the axial direction of the rotating shaft 28 is determined with respect to the casing section 56 .
- the holder 82 of the bypass section 80 integrally includes the valve mechanism (pilot type solenoid valve) 83 that opens and closes the bypass passage 81 .
- the bypass passage 81 includes a passage 81 a that extends from the casing section 56 side in parallel to the axial direction of the rotating shaft 28 and a passage 81 b that extends from the housing section 54 side in parallel to the axial direction of the rotating shaft 28 , the passage 81 a is formed at a position farther from the rotating shaft 28 than the passage 81 b , and the passages 81 a and 81 b communicate with each other through a passage 81 c that extends in the radial direction of the rotating shaft 28 .
- a valve body 83 a is moved from the outside to the inside in the radial direction of the rotating shaft 28 and is seated, a seat portion 81 d for blocking the passage 81 c (bypass passage 81 ) in the seated state is formed, and a plunger 83 b is supported on the radially outer side in relation to the seat portion 81 d to be displaced along the radial direction.
- the plunger 83 b is biased toward the seat portion 81 d (in a direction approaching the rotating shaft 28 ) by a coil spring (elastic body) 83 c and is displaced in a direction away from the seat portion 81 d (rotating shaft 28 ) by the magnetic force of the coil (solenoid) 83 d against the biasing force of the coil spring 83 c.
- a coil spring elastic body
- the base end portion 82 b of the holder 82 which accommodates the coil 83 d is exposed to the outside of the casing section 56 and the housing section 54 , and in the part exposed to the outside, a terminal (not illustrated) for electrical connection to the coil 83 d is provided.
- the valve body 83 a is supported between the plunger 83 b and the seat portion 81 d to be displaced in the same direction (the radial direction of the rotating shaft 28 ) as the forward and backward direction of the plunger 83 b.
- a pilot passage 83 e which penetrates through the valve body 83 a in the displacement direction thereof is formed in the valve body 83 a
- a pilot valve 83 f which blocks the opening of the pilot passage 83 e on the plunger 83 b side is formed in the front end of the plunger 83 b.
- the plunger 83 b is displaced toward the seat portion 81 d by the biasing force of the coil spring 83 c and thus the valve body 83 a pressed by the plunger 83 b is seated on the seat portion 81 d .
- the opening of the pilot passage 83 e on the plunger 83 b side is blocked by the pilot valve 83 f , resulting in a valve closed state in which the flow of the working fluid via the bypass passage 81 is inhibited.
- the plunger 83 b becomes separated from the valve body 83 a seated on the seat portion 81 d by the magnetic force of the coil 83 d , and thus the pilot valve 83 f becomes separated from the opening of the pilot passage 83 e on the plunger 83 b side such that the pilot passage 83 e is opened.
- the plunger 83 b When the electrical connection to the coil 83 d is interrupted in the valve open state (electrically connected state), the plunger 83 b is displaced in a direction approaching the seat portion 81 d by the biasing force of the coil spring 83 c to block the pilot passage 83 e , and furthermore, the valve body 83 a is pressed by the plunger 83 b and is displaced in the direction approaching the seat portion 81 d . Therefore, the valve body 83 a is seated on the seat portion 81 d and returns to the valve closed state. While the non-electrical connection to the coil 83 d is continued, the valve closed state is maintained.
- valve mechanism 83 which opens and closes the bypass passage 81 is a so-called pilot type solenoid valve constituted by the valve body 83 a , the plunger 83 b , the coil spring 83 c , the coil 83 d , and the like.
- the valve mechanism 83 is not limited to the pilot type solenoid valve which drives a valve body by using a pressure difference of a fluid, and may employ a direct acting solenoid valve which mechanically opens and closes a valve body by driving a movable core.
- the control unit 4 allows the coil 83 d to be electrically connected and thus allows the valve mechanism 83 to enter the valve open state so as to cause the suction port 55 and the discharge port 53 to communicate with each other through the bypass passage 81 immediately after the start-up of the Rankine cycle device 2 A to which the electromagnetic clutch 34 is engaged. Accordingly, the working fluid that is circulated by the pump 25 A driven by the engine 10 flows while bypassing the scrolls 51 and 52 provided as the driving section.
- the above-described expander 23 is provided integrally with the bypass passage 81 and the valve mechanism 83 which opens and closes the bypass passage 81 , compared to a case in which a bypass passage provided with a valve mechanism is connected to a pipe for circulating a working fluid, the circulation circuit of the working fluid in the Rankine cycle device 2 A can be simplified.
- bypass section 80 in which the bypass passage 81 is formed and the valve mechanism 83 is integrally provided is supposed between the casing section 56 in which the suction port 55 is formed and the housing section 54 in which the discharge port 53 is formed
- the bypass passage 81 and the valve mechanism 83 can be provided in the expander 23 (fluid machine) with a simple structure. Therefore, the processing of the expander 23 can be simplified and an increase in axial length of the expander 23 can be reduced.
- the movement direction of the plunger 83 b and the valve body 83 a in the valve mechanism 83 is set to be in the radial direction of the rotating shaft 28 , the movement spaces of the plunger 83 b and the valve body 83 a are long in the radial direction of the rotating shaft 28 , and compared to a case in which the movement direction thereof is set to a direction parallel to the rotating shaft 28 , the axial length of the expander 23 can be reduced.
- the coil (solenoid) 83 d of the valve mechanism 83 is accommodated in the base end portion 82 b of the holder 82 which is exposed to the outside of the casing section 56 and the housing section 54 , heat dissipation from the coil 83 d can be efficiently performed.
- the coil (solenoid) 83 d which is a large component among the components constituting the valve mechanism 83 is disposed on the outside of the part interposed between the casing section 56 and the housing section 54 , there is no need to secure the accommodation space of the coil (solenoid) 83 d to be in the part interposed between the casing section 56 and the housing section 54 , and for this reason, the axial length of the expander 23 can also be reduced.
- bypass section 80 in the structure in which the holder 82 (bypass section 80 ) is supported between the casing section 56 and the housing section 54 , one connection portion of the bypass passage 81 is sealed by a cylindrical seal and the other connection portion thereof is sealed by a flat seal. Therefore, the holder 82 (bypass section 80 ) can be easily positioned while blocking the leakage pathway of the working fluid.
- bypass passage 81 directly connects the suction port 55 to the discharge port 53 , sliding sections such as the anti-rotation mechanism 60 of the orbiting scroll 52 are absent in the bypass pathway.
- the bypass passage 81 is open, degradation of the viscosity of the lubricating oil of the sliding section and degradation of the lubricity of the sliding section due to the working fluid can be reduced.
- the suction port 55 and the discharge port 53 are directly connected to each other by the bypass passage 81
- the inlet side and the outlet side of the working fluid in the driving section constituted by the fixed scroll 51 and the orbiting scroll 52 may be connected by the bypass passage.
- an annular space (discharge side) surrounding the orbiting scroll 52 may be connected to the suction port 55 by the bypass passage.
- FIG. 4 illustrates the pump-integrated expander 29 A including the expander 23 in which the annular space (discharge side) surrounding the orbiting scroll 52 is connected to the suction port 55 by the bypass passage.
- the discharge port 53 formed in the housing section 54 is open in a direction different from the suction port 55 (for example, in a substantially reverse direction) with respect to the radial direction of the rotating shaft 28 .
- the recessed portion 54 e and the discharge side communication passage 93 are formed in the housing section 54 which opposes the part of the casing section 56 in which the suction side communication passage 92 is formed.
- the discharge side communication passage 93 is connected to a bypass space 102 that communicates with an annular space (discharge side space) 101 surrounding the orbiting scroll 52 , and the discharge port 53 allows the outside of the housing section 54 to communicate with the annular space 101 .
- the suction port 55 and the annular space (discharge side space) 101 communicate with each other via the suction side communication passage 92 , the bypass passage 81 , the discharge side communication passage 93 , and the bypass space 102 , and the working fluid can be circulated while bypassing the scrolls provided as the driving section. Therefore, the working fluid that flows from the suction port 55 into the annular space (discharge side space) 101 while bypassing the scrolls 51 and 52 is discharged to the outside from the annular space 101 via the discharge port 53 .
- the expander 23 of FIG. 4 is different from the expander 23 illustrated in FIG. 2 in the arrangement of the discharge port 53 . That is, the component connected to the bypass passage 81 via the discharge side communication passage 93 is changed to the annular space (discharge side space) 101 from the discharge port 53 .
- the structures of the scrolls 51 and 52 , the pump 25 A, the transmission mechanism 3 , the bypass section 80 , and the like are the same as those in the expander 23 of FIG. 2 , and thus detailed description thereof will not be presented.
- the discharge port 53 and the suction port 55 can be open to different direction in the all radial directions of the rotating shaft 28 . Therefore, compared to the expander 23 of FIG. 2 , the settings of the directions of the discharge port 53 and the suction port 55 are less limited and versatility is high.
- the working fluid flows into the annular space (discharge side space) 101 from the suction port 55 while bypassing the scrolls 51 and 52 , passes through the annular space (discharge side space) 101 in which the sliding sections such as the anti-rotation mechanism 60 of the orbiting scroll 52 are present, and thereafter flows to the discharge port 53 . Therefore, the sliding section is present in the middle of the bypass pathway.
- the expander 23 of FIG. 4 is disadvantageous in terms of securing lubricity of the sliding section.
- a ball coupling type anti-rotation mechanism such as an EM coupling
- problems such as seizure do not occur even in an insufficient lubrication state and high durability is provided. Accordingly, even when the working fluid that is circulated while bypassing the scrolls 51 and 52 is in a gas-liquid mixed state or in a liquid phase state, sufficient durability can be kept.
- the expander 23 illustrated in FIG. 2 or FIG. 4 is provided integrally with the pump 25 A.
- a generator may be provided integrally with the expander 23 instead of the pump 25 A or together with the pump 25 A.
- the bypass structure including the above-described holder 82 (bypass section 80 ) may also be applied to an expander which does not include the pump 25 A or the generator.
- the expander 23 may also be a rotary expander which includes a rotary piston as a driving section other than the scroll type.
- the cylindrical protrusion 82 c of the holder 82 may be provided on a surface that opposes the housing section 54 so as to fit the cylindrical protrusion 82 c into the discharge side communication passage 93
- the base portion 82 g of the holder 82 may be provided on a surface that opposes the casing section 56 so as to allow the base portion 82 g to abut on the surface of the casing section 56 in which the suction side communication passage 92 is open.
- the connection portion of the bypass passage 81 on the housing section 54 side may be sealed by a cylindrical seal
- the connection portion of the bypass passage 81 on the casing section 56 side may be sealed by a flat seal.
- the fluid machine is not limited to the expander 23 and may be a compressor.
- the fluid machine such as the expander 23 is not limited to being incorporated in the waste-heat reusing apparatus (Rankine cycle device).
Abstract
Description
- The present invention relates to a fluid machine which is driven by a working fluid suctioned from a suction port and discharges the working fluid to a discharge port.
-
Patent Document 1 discloses a fluid machine which integrally includes a bypass passage that guides a working fluid suctioned from a suction port to a discharge port while allowing the working fluid to bypass a driving section, and a valve mechanism that opens and closes the bypass passage. -
- Patent Document 1: Japanese Patent No. 4689498
- However, in the fluid machine according to the related art, since the bypass passage and the valve mechanism that opens and closes the bypass passage are provided, there may be cases in which complex processes need to be performed on the casing or housing included in the fluid machine or the axial length of the fluid machine is increased.
- For example, the fluid machine of
Patent Document 1 has a configuration in which the bypass passage is opened and closed by controlling the back pressure of a valve body using a solenoid valve in the valve mechanism. Therefore, an accommodating space of the solenoid valve, a back pressure chamber, a passage for communicating the back pressure chamber (high pressure chamber) and a low pressure chamber with each other, and the like need to be formed in the casing or the housing, and thus the processes may become complex. - Furthermore, in the fluid machine of
Patent Document 1, the high pressure chamber, into which the working fluid flows, is provided on the back surface side of a fixed scroll, and the solenoid valve, the back pressure chamber, and the like are arranged on the outside of the high pressure chamber, resulting in an increase in axial length of the fluid machine. - An object of the invention is to provide a fluid machine capable of integrally including a bypass passage and a valve mechanism which opens and closes the bypass passage while preventing processes from becoming complex and reducing an increase in axial length of the fluid machine.
- In order to accomplish the object, a fluid machine according to the invention includes: a suction port into which a working fluid that becomes a heated vapor and has a high pressure flows; a casing section including the suction port; a driving section which is driven by expansion of the working fluid suctioned from the suction port; a discharge port from which the working fluid that has passed through the driving section and has a low pressure flows; and a housing section including the discharge port, in which a bypass section, in which a bypass passage that guides the working fluid suctioned from the suction port to the discharge port while allowing the working fluid to bypass the driving section is formed and a valve mechanism that opens and closes the bypass passage is included, is supported between the casing section and the housing section.
- In the fluid machine according to the invention, the bypass passage and the valve mechanism which opens and closes the bypass passage can be provided with a simple structure. Therefore, processing of the fluid machine can be simple and a reduction in the size of the fluid machine can be achieved.
-
FIG. 1 is a diagram illustrating the schematic configuration of a waste-heat reusing apparatus in an embodiment of the invention. -
FIG. 2 is a cross-sectional view illustrating a pump-integrated expander incorporated in the waste-heat reusing apparatus. -
FIG. 3 is a partial enlarged cross-sectional view illustrating a bypass section included in the pump-integrated expander. -
FIG. 4 is a cross-sectional view illustrating another example of the pump-integrated expander incorporated in the waste-heat reusing apparatus. - Hereinbelow, embodiments of the invention will be described in detail with reference to the accompanying drawings.
-
FIG. 1 illustrates a waste-heat reusingapparatus 1A for a vehicle, in which an expander as a fluid machine is incorporated. - The waste-heat reusing
apparatus 1A is an apparatus that is mounted in the vehicle along with anengine 10 and recovers waste heat of theengine 10 for use. - The waste-heat reusing
apparatus 1A includes a Rankinecycle device 2A, atransmission mechanism 3 which transmits the output of the Rankinecycle device 2A to theengine 10, and acontrol unit 4. - The
engine 10 is an internal combustion engine provided with a water-cooling type cooling device, and the cooling device includes acoolant circulation passage 11 through which a coolant is circulated. - An
evaporator 22 of the Rankinecycle device 2A is disposed in thecoolant circulation passage 11 so that the coolant that absorbs heat from theengine 10 is returned to theengine 10 after passing through theevaporator 22. - The Rankine
cycle device 2A recovers the waste heat of theengine 10 from the coolant of theengine 10 and converts the recovered heat into driving force so as to be output. - The Rankine
cycle device 2A includes acirculation passage 21 through which a working fluid is circulated, and in thecirculation passage 21, theevaporator 22, theexpander 23, acondenser 24, and apump 25A are arranged in this order along the flow direction of the working fluid. - As the working fluid (refrigerant), for example, a substance which includes a fluorocarbon skeleton as a base is used. In addition, a lubricating oil circulates along with the working fluid and has functions of lubricating, sealing, cooling, and the like in sliding sections of the
expander 23 and thepump 25A. - The
evaporator 22 allows heat transfer between the high-temperature coolant that has absorbed heat from theengine 10 and the working fluid of the Rankinecycle device 2A so that the working fluid is heated and evaporated (vaporized). - The expander 23 (fluid machine) is a device which generates driving force by expanding the working fluid that has a high temperature and a high pressure through the vaporization in the
evaporator 22, and uses, as an example, a scroll type expander. - The
condenser 24 allows heat exchange between the low pressure working fluid that has passed through theexpander 23 and the outside air to cool the working fluid so as to be condensed (liquefied). - The
pump 25A is a mechanical pump and forcibly feeds the working fluid liquefied in thecondenser 24 to theevaporator 22. - In this manner, the working fluid circulates through the
circulation passage 21 while repeating vaporization, expansion, and condensation. - Here, the
expander 23 and thepump 25A are connected by a rotatingshaft 28 to be integrated, thereby providing a pump-integratedexpander 29A (fluid machine). That is, therotating shaft 28 of the pump-integratedexpander 29A functions as the output shaft of theexpander 23 and functions as the driving shaft of thepump 25A. - The Rankine
cycle device 2A is first started up by driving thepump 25A by the output of theengine 10, and thereafter, when theexpander 23 generates sufficient driving force, the driving force of theexpander 23 drives thepump 25A. - The
transmission mechanism 3 transmits the torque (axial torque) of the pump-integratedexpander 29A, which is the output of the Rankinecycle device 2A, to theengine 10 and transmits the output torque of theengine 10 to the pump-integratedexpander 29A (pump unit) during start-up of the Rankinecycle device 2A. - The
transmission mechanism 3 includes apulley 31 attached to the rotatingshaft 28 of the pump-integratedexpander 29A, acrank pulley 32 attached to acrankshaft 10 a of theengine 10, abelt 33 wound around thepulley 31 and thecrank pulley 32, and anelectromagnetic clutch 34 provided between the rotatingshaft 28 of the pump-integratedexpander 29A and thepulley 31. - By turning on (engaging) and turning off (disengaging) the
electromagnetic clutch 34, power transmission and power interruption between the engine 10 (crankshaft 10 a) and the rotatingshaft 28 of the pump-integratedexpander 29A are switched. - The
control unit 4 having a microcomputer has a function of controlling theelectromagnetic clutch 34, and controls an operation and a stop of the Rankinecycle device 2A through the on and off control of theelectromagnetic clutch 34. - That is, when the
control unit 4 determines the establishment of the operating conditions of the Rankinecycle device 2A, theelectromagnetic clutch 34 is engaged (turned on) and thepump 25A is operated by theengine 10 to start the circulation of the working fluid (refrigerant), thereby starting up the Rankinecycle device 2A. - When the
expander 23 is activated and starts to generate a driving force, a part of the driving force generated by theexpander 23 is used to drive thepump 25A, and the remaining driving force is transmitted to theengine 10 via thetransmission mechanism 3 to assist the output (driving force) of theengine 10. - In a case in which the operating conditions of the Rankine
cycle device 2A are not established, thecontrol unit 4 disengages (turns off) theelectromagnetic clutch 34 to stop the circulation of the working fluid, thereby stopping the Rankinecycle device 2A. - The
evaporator 22 may also act as a device that allows heat exchange between the working fluid of the Rankinecycle device 2A and exhaust air of theengine 10 or may also act as a device that allows heat exchange with the coolant of theengine 10 and allows heat exchange with exhaust of theengine 10. - As described later, the
expander 23 integrally includes abypass passage 81 for circulating the working fluid to bypass scrolls provided as a driving portion and avalve mechanism 83 for opening and closing thebypass passage 81. - In addition, the
control unit 4 controls thevalve mechanism 83 to be opened so as to open thebypass passage 81 immediately after the start-up of the Rankinecycle device 2A at which theelectromagnetic clutch 34 is engaged so that the working fluid is circulated while bypassing the scrolls of theexpander 23. - Thereafter, for example, when the refrigerant temperature at the inlet of the
expander 23 exceeds a threshold, in other words, when theexpander 23 can generate driving force, thecontrol unit 4 controls thevalve mechanism 83 to be closed to close thebypass passage 81, to thereby perform a changeover to a state in which the working fluid is circulated while passing through the scrolls of theexpander 23. - As described above, when the working fluid is circulated while bypassing the scrolls of the
expander 23 immediately after the start-up of the Rankinecycle device 2A, the pressure in theevaporator 22 decreases and the evaporation temperature of the working fluid also decreases. Therefore, the start-up performance of the Rankinecycle device 2A can be improved. In addition, at the time of stopping the Rankinecycle device 2A, when theelectromagnetic clutch 34 is disengaged (turned off), thebypass passage 81 is opened so as to prevent high-speed rotations due to the residual pressure. - Next, the structure of the pump-integrated
expander 29A will be described in detail with reference toFIG. 2 . - As described above, the pump-integrated
expander 29A is a fluid machine in which thepump 25A that circulates the working fluid of the Rankinecycle device 2A and theexpander 23 that generates rotational driving force through the expansion of the working fluid heated and vaporized in theevaporator 22 are driven by the common rotatingshaft 28, and includes thepulley 31 and theelectromagnetic clutch 34 included in thetransmission mechanism 3. - The
expander 23 of the pump-integratedexpander 29A includes afixed scroll 51 which is disposed in one end portion of the pump-integratedexpander 29A in the axial direction, an orbiting scroll (rotating body) 52 assembled to be eccentrically engaged with thefixed scroll 51, ahousing section 54 provided with adischarge port 53, and acasing section 56 provided with asuction port 55. - The
fixed scroll 51 includes a disc-like body portion 51 a, a scroll portion (spiral body) 51 b uprightly provided on one end surface of thebody portion 51 a in a rib shape, and anintroduction port 51 c for the working fluid, which is formed to penetrate through the center of thebody portion 51 a. - The
housing section 54 is formed in a cylindrical shape with both ends opened, and includes a firsthollow portion 54 a into which thecasing section 56 is fitted and which accommodates thefixed scroll 51 and theorbiting scroll 52, a secondhollow portion 54 b which supports a large-diameter portion 64 included in a driven crank mechanism between the orbitingscroll 52 and the rotatingshaft 28, and a thirdhollow portion 54 c which supports the rotatingshaft 28. - In addition, on the
pump 25A side of the firsthollow portion 54 a, thedischarge port 53 which allows the internal space (discharge side space of the scrolls) of the firsthollow portion 54 a to communicate with the external space is formed along the radial direction of the rotatingshaft 28. - The
casing section 56 includes acylindrical portion 56 a which is provided integrally with thefixed scroll 51 on the inside and of which the outside is fitted into the firsthollow portion 54 a, and a workingfluid introduction chamber 56 b which communicates with theintroduction port 51 c of thefixed scroll 51. Thesuction port 55 which allows the workingfluid introduction chamber 56 b to communicate with the external space of thecasing section 56 is formed along the radial direction of the rotatingshaft 28. - Here, the
discharge port 53 and thesuction port 55 are substantially parallel to each other, extend in a direction at the same angle from the axis of the rotatingshaft 28, and are arranged in the axial direction of the rotatingshaft 28. - To the
suction port 55, one end of a pipe, the other end of which is connected to the outlet of theevaporator 22, is connected so that the working fluid heated in theevaporator 22 is introduced into theexpander 23 via thesuction port 55. - The working fluid introduced into the
suction port 55 flows into the workingfluid introduction chamber 56 b and thereafter is introduced to the center portion of the fixedscroll 51 via theintroduction port 51 c. - The working fluid introduced to the center portion of the fixed
scroll 51 presses the wall surface of the orbitingscroll 52 to form an expansion chamber, and as the working fluid is continuously supplied, the expansion chamber moves to the outer circumferential side, which causes orbiting motion of the orbitingscroll 52. - To the
discharge port 53, one end of a pipe, the other end of which is connected to the inlet of thecondenser 24, is connected so that the working fluid which passes through theexpander 23 is sent to thecondenser 24 to be condensed (liquefied). - The orbiting
scroll 52 includes a disc-like body portion 52 a and a scroll portion (spiral body) 52 b uprightly provided on one end surface of thebody portion 52 a in a rib shape. - Here, an
anti-rotation mechanism 60 is provided between the surface of thebody portion 52 a on the opposite side to the end surface thereof in which thescroll portion 52 b is formed, and a steppedportion 54 d which reaches the secondhollow portion 54 b from the firsthollow portion 54 a of thehousing section 54 so that the orbitingscroll 52 makes orbiting motion as the working fluid expands while being prevented from rotating by theanti-rotation mechanism 60. - As the
anti-rotation mechanism 60, there are an Oldham coupling, a pin and ring coupling, a ball coupling, and the like. Here, a ball coupling which uses balls as rolling elements is used, and particularly, a ball coupling called an EM coupling (refer to “EM coupling for Scroll Compressors” in NTN TECHNICAL REVIEW No. 68 (2000)) is used. The EM coupling is constituted by two plates made by integrally press-forming the race and the ring, steel balls (balls), and the like. - A
cylindrical portion 52 c protrudes from the end surface of thebody portion 52 a of the orbitingscroll 52 on theanti-rotation mechanism 60 side, and adrive bearing 61 is provided on the inside of thecylindrical portion 52 c. Aneccentric bush 62 is fitted into the drive bearing 61, and acrankpin hole 62 a is formed in theeccentric bush 62. - The large-
diameter portion 64 is rotatably supported by the secondhollow portion 54 b of thehousing section 54 via abearing 63, and acrankpin 64 a is uprightly provided on the large-diameter portion 64 so that thecrankpin 64 a is parallel to therotating shaft 28 and has an axial center shifted from the rotatingshaft 28. Thecrankpin 64 a is inserted into thecrankpin hole 62 a of theeccentric bush 62. - The rotating
shaft 28 is connected to the large-diameter portion 64 so that the orbiting motion of the orbitingscroll 52 around the rotatingshaft 28 is transmitted as the rotational driving force of therotating shaft 28 by the driven crank mechanism constituted by theeccentric bush 62, thecrankpin 64 a, and the large-diameter portion 64. - In addition, a counterweight (balancing weight) 74 for reducing occurrence of vibrations of the
expander 23 is attached to theeccentric bush 62. - Furthermore, in order to restrict the orbiting radius of the orbiting
scroll 52, arestriction hole 64 b is provided in the large-diameter portion 64, and arestriction protrusion 62 b fitted into therestriction hole 64 b is provided in theeccentric bush 62. Therefore, the oscillation of theeccentric bush 62 around thecrankpin 64 a is restricted by the engagement between therestriction hole 64 b and therestriction protrusion 62 b. - The rotating
shaft 28 is supported by abearing 65 provided in the thirdhollow portion 54 c of thehousing section 54 and is supported by abearing 67 provided in the end portion of apump housing 66 connected to thehousing section 54 so as to rotate. - The
pump 25A is provided in thepump housing 66. Thepump 25A is, as an example, a gear pump, and the gear pump is constituted by a driving gear (rotating body) that is axially supported by the rotatingshaft 28, a driven shaft that is rotatably supported in parallel to therotating shaft 28, and a driven gear that is axially supported by the driven shaft and is engaged with the driving gear. - In the
pump housing 66, apump suction port 66 a which communicates with the suction port of thepump 25A, and apump discharge port 66 b which communicates with the discharge port of thepump 25A are formed. - To the
pump suction port 66 a, one end of a pipe, the other end of which is connected to the outlet of thecondenser 24, is connected so that the working fluid condensed (liquefied) in thecondenser 24 is suctioned into thepump 25A. In addition, to thepump discharge port 66 b, one end of a pipe, the other end of which is connected to the inlet of theevaporator 22, is connected so that the working fluid condensed (liquefied) in thecondenser 24 is forcibly fed to theevaporator 22 to be evaporated (vaporized). - As the
pump 25A, a well-known pump may be appropriately employed, and other than the gear pump, a vane pump or the like may be used. - On the end portion of the
rotating shaft 28 that passes through thepump housing 66 and extends to the outside, thepulley 31 and the electromagnetic clutch 34 included in thetransmission mechanism 3 are disposed. - A
cylindrical portion 66 c in which therotating shaft 28 is positioned is formed integrally with the end surface of thepump housing 66 on the opposite side to theexpander 23 side. The bearing 67 which supports therotating shaft 28 is disposed on the front end side of the inside of thecylindrical portion 66 c, and ashaft seal 68 is disposed on the bottom portion side (theexpander 23 side) of thecylindrical portion 66 c. - In addition, a
clutch plate 71 is attached to the front end of therotating shaft 28 that protrudes from thecylindrical portion 66 c, and thepulley 31 is rotatably attached to the outer circumference of thecylindrical portion 66 c via abearing 72. - Furthermore, a
clutch coil 73 is accommodated in anannular groove 31 a that is formed in the end surface of thepulley 31 on theexpander 23 side and is centered on therotating shaft 28, and theelectromagnetic clutch 34 is constituted by theclutch plate 71 and theclutch coil 73. - When the
clutch coil 73 is electrically connected, magnetic attraction occurs and theclutch plate 71 is brought into contact with thepulley 31 such that thepulley 31 and the clutch plate 71 (rotating shaft 28) are interlocked with each other. As a result, power is transmitted between therotating shaft 28 of the pump-integratedexpander 29A and the engine 10 (crankshaft 10 a). - The
expander 23 of the pump-integratedexpander 29A further includes abypass section 80 for guiding the working fluid suctioned from thesuction port 55 to thedischarge port 53 while allowing the working fluid to bypass the driving section including the fixedscroll 51 and the orbitingscroll 52. - The
bypass section 80 includes aholder 82 in which thebypass passage 81 is formed, and the valve mechanism (solenoid valve) 83 which is supported by theholder 82 and opens and closes thebypass passage 81, and is supported between thecasing section 56 provided with thesuction port 55 and thehousing section 54 provided with thedischarge port 53. - In addition, the
valve mechanism 83 is a solenoid valve having acoil 83 d. Ashim 96 is fixed between theholder 82 and thecasing section 56 and between thehousing section 54 and thecasing section 56. - Hereinbelow, details of the
bypass section 80 will be described with reference toFIG. 3 . - The
holder 82 includes afront end portion 82 a in which thebypass passage 81 is formed and abase end portion 82 b which holds the coil of thevalve mechanism 83 and the like, and thefront end portion 82 a is supposed between thecasing section 56 and thehousing section 54 in the axial direction of therotating shaft 28. - An
accommodation space 91 for supporting thefront end portion 82 a of theholder 82 is provided between a part in which thesuction port 55 of thecasing section 56 is formed and a part in which thedischarge port 53 of thehousing section 54 is formed. Theaccommodation space 91 is a space which is surrounded by thecasing section 56 and thehousing section 54 with a bottom and is open to the radially outer side of therotating shaft 28. - A suction
side communication passage 92 which communicates with thesuction port 55 is open to the surface of theaccommodation space 91 that is on thecasing section 56 side and configured to support thefront end portion 82 a of theholder 82 in the axial direction. In addition, a dischargeside communication passage 93 which communicates with thedischarge port 53 is open to the surface of theaccommodation space 91 that is on thehousing section 54 side and configured to support thefront end portion 82 a in the axial direction. - In addition, the
bypass passage 81 which extends in the axial direction of therotating shaft 28 is formed in thefront end portion 82 a of theholder 82, and in a state in which thefront end portion 82 a is supported between thecasing section 56 and thehousing section 54 in the axial direction of therotating shaft 28, one end of thebypass passage 81 is connected to the suctionside communication passage 92 and the other end of thebypass passage 81 is connected to the dischargeside communication passage 93, thereby forming a bypass passage of the working fluid. - As described above, the bypass section 80 (holder 82) is disposed between the
suction port 55 and thedischarge port 53 so that thesuction port 55 and thedischarge port 53 directly communicate with each other through thebypass passage 81 formed in theholder 82. - A part of the
holder 82 in which the end portion of thebypass passage 81 on thecasing section 56 side is open forms acylindrical protrusion 82 c which protrudes in a cylindrical shape along the direction parallel to the axis of therotating shaft 28, and thebypass passage 81 extends in the axial center of thecylindrical protrusion 82 c. - On the other hand, the suction
side communication passage 92 has a fitting hole (enlarged diameter portion) 92 a having a diameter into which thecylindrical protrusion 82 c is fitted, on theholder 82 side (thehousing section 54 side). That is, the suctionside communication passage 92 is formed to have substantially the same diameter as thebypass passage 81 from thesuction port 55 side and in the middle of the passage, the diameter thereof is enlarged to a diameter into which the outer circumference of thecylindrical protrusion 82 c is fitted. - In addition, an
annular groove 82 f is formed in the outer circumference of thecylindrical protrusion 82 c and a seal member (O-ring) 94 formed of an elastic material such as rubber in an annular shape is fitted into theannular groove 82 f. When thecylindrical protrusion 82 c is fitted into thefitting hole 92 a, the gap between the outer circumference of thecylindrical protrusion 82 c and the inner circumference of thefitting hole 92 a of the suctionside communication passage 92 is sealed by theseal member 94. - That is, by fitting the
cylindrical protrusion 82 c into thefitting hole 92 a of the suctionside communication passage 92, thebypass passage 81 is allowed to communicate with thesuction port 55, and the position of theholder 82 in the radial direction of therotating shaft 28 is determined with respect to the suctionside communication passage 92 so that the gap between thecylindrical protrusion 82 c of theholder 82 and thefitting hole 92 a of thecasing section 56, in other words, thesuction port 55 side of thebypass passage 81, is sealed by the cylindrical seal. - Abutment between the
holder 82 and thecasing section 56 in the axial direction of therotating shaft 28 is performed between aflat surface portion 82 e of the root portion of thecylindrical protrusion 82 c and a flat surface portion 56 c of thecasing section 56 in which the suctionside communication passage 92 is open. In addition, between theholder 82 and thecasing section 56 and between thehousing section 54 and thecasing section 56, theshim 96 which is a fitting strip made of, for example, metal is fixed. By the shim, the gap between the fixedscroll 51 and the orbitingscroll 52 in the axial direction of therotating shaft 28 is adjusted. - A
base portion 82 g which forms an abutment surface parallel to the transverse cross-section of therotating shaft 28 protrudes from a part of theholder 82 in which the end portion of thebypass passage 81 on thehousing section 54 side is open, and a recessedportion 54 e into which thebase portion 82 g is loosely inserted and which has a bottom surface (flat surface portion), which is parallel to the end surface (flat surface portion) of thebase portion 82 g and to which the dischargeside communication passage 93 is open, is formed in thehousing section 54. - In addition, in a case in which the
holder 82 is supported between thehousing section 54 and thecasing section 56, when thebase portion 82 g is loosely inserted into the recessedportion 54 e, thebypass passage 81 on theholder 82 side and the dischargeside communication passage 93 on thehousing section 54 side communicate with each other, and thebypass passage 81 is connected to thedischarge port 53 via the dischargeside communication passage 93. - That is, the
bypass passage 81 is formed from the front end of thecylindrical protrusion 82 c to thebase portion 82 g (flat surface portion), and by supporting theholder 82 between thehousing section 54 and thecasing section 56, thesuction port 55 and thedischarge port 53 are allowed to communicate with each other by thebypass passage 81. - An
annular groove 54 f is formed in the bottom surface of the recessedportion 54 e so as to surround the opening of the dischargeside communication passage 93, and aseal member 95 formed of an elastic material such as rubber is fitted into thegroove 54 f so that the abutment surface between theholder 82 and thehousing section 54 is surrounded and sealed by theseal member 95. That is, the periphery of the connection portion between thebypass passage 81 on theholder 82 side and the dischargeside communication passage 93 on thehousing section 54 side is sealed by a flat seal. In other words, thebypass passage 81 and thedischarge port 53 are sealed by the flat seal. - The
seal member 95 generates a force to bias theholder 82 toward thecasing section 56 side by being compressed by theholder 82, and accordingly, theholder 82 abuts on thecasing section 56 side and the position of theholder 82 in the axial direction of therotating shaft 28 is determined with respect to thecasing section 56. - In addition, the
holder 82 of thebypass section 80 integrally includes the valve mechanism (pilot type solenoid valve) 83 that opens and closes thebypass passage 81. - The
bypass passage 81 includes apassage 81 a that extends from thecasing section 56 side in parallel to the axial direction of therotating shaft 28 and apassage 81 b that extends from thehousing section 54 side in parallel to the axial direction of therotating shaft 28, thepassage 81 a is formed at a position farther from the rotatingshaft 28 than thepassage 81 b, and thepassages passage 81 c that extends in the radial direction of therotating shaft 28. - In the
passage 81 c, avalve body 83 a is moved from the outside to the inside in the radial direction of therotating shaft 28 and is seated, aseat portion 81 d for blocking thepassage 81 c (bypass passage 81) in the seated state is formed, and aplunger 83 b is supported on the radially outer side in relation to theseat portion 81 d to be displaced along the radial direction. - The
plunger 83 b is biased toward theseat portion 81 d (in a direction approaching the rotating shaft 28) by a coil spring (elastic body) 83 c and is displaced in a direction away from theseat portion 81 d (rotating shaft 28) by the magnetic force of the coil (solenoid) 83 d against the biasing force of thecoil spring 83 c. - Here, the
base end portion 82 b of theholder 82 which accommodates thecoil 83 d is exposed to the outside of thecasing section 56 and thehousing section 54, and in the part exposed to the outside, a terminal (not illustrated) for electrical connection to thecoil 83 d is provided. - The
valve body 83 a is supported between theplunger 83 b and theseat portion 81 d to be displaced in the same direction (the radial direction of the rotating shaft 28) as the forward and backward direction of theplunger 83 b. - A
pilot passage 83 e which penetrates through thevalve body 83 a in the displacement direction thereof is formed in thevalve body 83 a, and apilot valve 83 f which blocks the opening of thepilot passage 83 e on theplunger 83 b side is formed in the front end of theplunger 83 b. - In addition, in a state in which the
coil 83 d is not electrically connected, theplunger 83 b is displaced toward theseat portion 81 d by the biasing force of thecoil spring 83 c and thus thevalve body 83 a pressed by theplunger 83 b is seated on theseat portion 81 d. In addition, the opening of thepilot passage 83 e on theplunger 83 b side is blocked by thepilot valve 83 f, resulting in a valve closed state in which the flow of the working fluid via thebypass passage 81 is inhibited. - When the
coil 83 d is electrically connected in the closed state, theplunger 83 b becomes separated from thevalve body 83 a seated on theseat portion 81 d by the magnetic force of thecoil 83 d, and thus thepilot valve 83 f becomes separated from the opening of thepilot passage 83 e on theplunger 83 b side such that thepilot passage 83 e is opened. - When the
pilot passage 83 e is opened, the pressure in the space (main valve chamber) interposed between thevalve body 83 a and theplunger 83 b decreases to the pressure on thedischarge port 53 side, and a high pressure on thesuction port 55 side is applied to the lower side of the outside of thevalve body 83 a. Therefore, due to the pressure difference, thevalve body 83 a is lifted and becomes separated from theseat portion 81 d, resulting in a valve open state in which the working fluid flows via thebypass passage 81. While the electrical connection to thecoil 83 d is continued, the valve open state is maintained. - When the electrical connection to the
coil 83 d is interrupted in the valve open state (electrically connected state), theplunger 83 b is displaced in a direction approaching theseat portion 81 d by the biasing force of thecoil spring 83 c to block thepilot passage 83 e, and furthermore, thevalve body 83 a is pressed by theplunger 83 b and is displaced in the direction approaching theseat portion 81 d. Therefore, thevalve body 83 a is seated on theseat portion 81 d and returns to the valve closed state. While the non-electrical connection to thecoil 83 d is continued, the valve closed state is maintained. - As described above, the
valve mechanism 83 which opens and closes thebypass passage 81 is a so-called pilot type solenoid valve constituted by thevalve body 83 a, theplunger 83 b, thecoil spring 83 c, thecoil 83 d, and the like. - The
valve mechanism 83 is not limited to the pilot type solenoid valve which drives a valve body by using a pressure difference of a fluid, and may employ a direct acting solenoid valve which mechanically opens and closes a valve body by driving a movable core. - The
control unit 4 allows thecoil 83 d to be electrically connected and thus allows thevalve mechanism 83 to enter the valve open state so as to cause thesuction port 55 and thedischarge port 53 to communicate with each other through thebypass passage 81 immediately after the start-up of theRankine cycle device 2A to which theelectromagnetic clutch 34 is engaged. Accordingly, the working fluid that is circulated by thepump 25A driven by theengine 10 flows while bypassing thescrolls - As described above, since the above-described
expander 23 is provided integrally with thebypass passage 81 and thevalve mechanism 83 which opens and closes thebypass passage 81, compared to a case in which a bypass passage provided with a valve mechanism is connected to a pipe for circulating a working fluid, the circulation circuit of the working fluid in theRankine cycle device 2A can be simplified. - In addition, since the holder 82 (bypass section 80) in which the
bypass passage 81 is formed and thevalve mechanism 83 is integrally provided is supposed between thecasing section 56 in which thesuction port 55 is formed and thehousing section 54 in which thedischarge port 53 is formed, thebypass passage 81 and thevalve mechanism 83 can be provided in the expander 23 (fluid machine) with a simple structure. Therefore, the processing of theexpander 23 can be simplified and an increase in axial length of theexpander 23 can be reduced. - In addition, since the movement direction of the
plunger 83 b and thevalve body 83 a in thevalve mechanism 83 is set to be in the radial direction of therotating shaft 28, the movement spaces of theplunger 83 b and thevalve body 83 a are long in the radial direction of therotating shaft 28, and compared to a case in which the movement direction thereof is set to a direction parallel to therotating shaft 28, the axial length of theexpander 23 can be reduced. - Furthermore, since the coil (solenoid) 83 d of the
valve mechanism 83 is accommodated in thebase end portion 82 b of theholder 82 which is exposed to the outside of thecasing section 56 and thehousing section 54, heat dissipation from thecoil 83 d can be efficiently performed. - In addition, since the coil (solenoid) 83 d which is a large component among the components constituting the
valve mechanism 83 is disposed on the outside of the part interposed between thecasing section 56 and thehousing section 54, there is no need to secure the accommodation space of the coil (solenoid) 83 d to be in the part interposed between thecasing section 56 and thehousing section 54, and for this reason, the axial length of theexpander 23 can also be reduced. - In addition, in the structure in which the holder 82 (bypass section 80) is supported between the
casing section 56 and thehousing section 54, one connection portion of thebypass passage 81 is sealed by a cylindrical seal and the other connection portion thereof is sealed by a flat seal. Therefore, the holder 82 (bypass section 80) can be easily positioned while blocking the leakage pathway of the working fluid. - Furthermore, since the
bypass passage 81 directly connects thesuction port 55 to thedischarge port 53, sliding sections such as theanti-rotation mechanism 60 of the orbitingscroll 52 are absent in the bypass pathway. In addition, even when the working fluid in a gas-liquid mixed state or in a liquid phase state flows when thebypass passage 81 is open, degradation of the viscosity of the lubricating oil of the sliding section and degradation of the lubricity of the sliding section due to the working fluid can be reduced. - However, in the
expander 23 illustrated inFIG. 2 , although thesuction port 55 and thedischarge port 53 are directly connected to each other by thebypass passage 81, the inlet side and the outlet side of the working fluid in the driving section constituted by the fixedscroll 51 and the orbitingscroll 52 may be connected by the bypass passage. For example, an annular space (discharge side) surrounding the orbitingscroll 52 may be connected to thesuction port 55 by the bypass passage. -
FIG. 4 illustrates the pump-integratedexpander 29A including theexpander 23 in which the annular space (discharge side) surrounding the orbitingscroll 52 is connected to thesuction port 55 by the bypass passage. - In the
expander 23 illustrated inFIG. 4 , thedischarge port 53 formed in thehousing section 54 is open in a direction different from the suction port 55 (for example, in a substantially reverse direction) with respect to the radial direction of therotating shaft 28. - In addition, in the
expander 23 illustrated inFIG. 4 , similarly to theexpander 23 illustrated inFIG. 2 , the recessedportion 54 e and the dischargeside communication passage 93 are formed in thehousing section 54 which opposes the part of thecasing section 56 in which the suctionside communication passage 92 is formed. - Here, the discharge
side communication passage 93 is connected to a bypass space 102 that communicates with an annular space (discharge side space) 101 surrounding the orbitingscroll 52, and thedischarge port 53 allows the outside of thehousing section 54 to communicate with theannular space 101. - That is, the
suction port 55 and the annular space (discharge side space) 101 communicate with each other via the suctionside communication passage 92, thebypass passage 81, the dischargeside communication passage 93, and the bypass space 102, and the working fluid can be circulated while bypassing the scrolls provided as the driving section. Therefore, the working fluid that flows from thesuction port 55 into the annular space (discharge side space) 101 while bypassing thescrolls annular space 101 via thedischarge port 53. - As described above, the
expander 23 ofFIG. 4 is different from theexpander 23 illustrated inFIG. 2 in the arrangement of thedischarge port 53. That is, the component connected to thebypass passage 81 via the dischargeside communication passage 93 is changed to the annular space (discharge side space) 101 from thedischarge port 53. However, the structures of thescrolls pump 25A, thetransmission mechanism 3, thebypass section 80, and the like are the same as those in theexpander 23 ofFIG. 2 , and thus detailed description thereof will not be presented. - Even in the
expander 23 ofFIG. 4 , since the holder 82 (bypass section 80) is supported between thecasing section 56 and thehousing section 54, the same actions and effects as those of theexpander 23 illustrated inFIG. 2 can be obtained. - In addition, since the
discharge port 53 and thesuction port 55 can be open to different direction in the all radial directions of therotating shaft 28. Therefore, compared to theexpander 23 ofFIG. 2 , the settings of the directions of thedischarge port 53 and thesuction port 55 are less limited and versatility is high. - In the
expander 23 ofFIG. 4 , the working fluid flows into the annular space (discharge side space) 101 from thesuction port 55 while bypassing thescrolls anti-rotation mechanism 60 of the orbitingscroll 52 are present, and thereafter flows to thedischarge port 53. Therefore, the sliding section is present in the middle of the bypass pathway. - Therefore, compared to the
expander 23 illustrated inFIG. 2 in which the sliding section is absent in the bypass pathway, theexpander 23 ofFIG. 4 is disadvantageous in terms of securing lubricity of the sliding section. However, in a case in which a ball coupling type anti-rotation mechanism such as an EM coupling is used as theanti-rotation mechanism 60, it has been confirmed by experiments that problems such as seizure do not occur even in an insufficient lubrication state and high durability is provided. Accordingly, even when the working fluid that is circulated while bypassing thescrolls - While the contents of the invention have been described in detail with reference to the preferred embodiments, it is understood by those skilled in the art that various modifications can be made on the basis of the technical spirit and scope of the invention.
- For example, the
expander 23 illustrated inFIG. 2 orFIG. 4 is provided integrally with thepump 25A. However, a generator may be provided integrally with theexpander 23 instead of thepump 25A or together with thepump 25A. Furthermore, the bypass structure including the above-described holder 82 (bypass section 80) may also be applied to an expander which does not include thepump 25A or the generator. - In addition, the
expander 23 may also be a rotary expander which includes a rotary piston as a driving section other than the scroll type. - In addition, the
cylindrical protrusion 82 c of theholder 82 may be provided on a surface that opposes thehousing section 54 so as to fit thecylindrical protrusion 82 c into the dischargeside communication passage 93, and thebase portion 82 g of theholder 82 may be provided on a surface that opposes thecasing section 56 so as to allow thebase portion 82 g to abut on the surface of thecasing section 56 in which the suctionside communication passage 92 is open. In other words, the connection portion of thebypass passage 81 on thehousing section 54 side may be sealed by a cylindrical seal, and the connection portion of thebypass passage 81 on thecasing section 56 side may be sealed by a flat seal. - In addition, the fluid machine is not limited to the
expander 23 and may be a compressor. - Furthermore, the fluid machine such as the
expander 23 is not limited to being incorporated in the waste-heat reusing apparatus (Rankine cycle device). -
- 1A Waste-heat reusing apparatus
- 2A Rankine cycle device
- 10 Engine
- 21 Circulation passage
- 22 Evaporator
- 23 Expander
- 24 Condenser
- 25A Pump
- 28 Rotating shaft
- 29A Pump-integrated expander (fluid machine)
- 31 Pulley
- 34 Electromagnetic clutch
- 51 Fixed scroll
- 52 Orbiting scroll
- 53 Discharge port
- 54 Housing section
- 55 Suction port
- 56 Casing section
- 60 Anti-rotation mechanism
- 62 Eccentric bush
- 80 Bypass section
- 80 Bypass passage
- 82 Holder
- 82 c Cylindrical protrusion
- 83 Valve mechanism
- 83 a Valve body
- 83 b Plunger
- 83 c Coil spring
- 83 d Coil
- 92 Suction side communication passage
- 92 a Fitting hole (enlarged diameter portion)
- 93 Discharge side communication passage
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-057347 | 2012-03-14 | ||
JP2012057347A JP5969227B2 (en) | 2012-03-14 | 2012-03-14 | Fluid machinery |
PCT/JP2013/057084 WO2013137352A1 (en) | 2012-03-14 | 2013-03-13 | Fluid machine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150033744A1 true US20150033744A1 (en) | 2015-02-05 |
Family
ID=49161257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/385,454 Abandoned US20150033744A1 (en) | 2012-03-14 | 2013-03-13 | Fluid Machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20150033744A1 (en) |
JP (1) | JP5969227B2 (en) |
CN (1) | CN104169527A (en) |
DE (1) | DE112013001450T5 (en) |
WO (1) | WO2013137352A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150047351A1 (en) * | 2011-09-30 | 2015-02-19 | Takayuki Ishikawa | Waste heat utilization apparatus |
US20150176482A1 (en) * | 2012-07-09 | 2015-06-25 | Sanden Corporation | Device for Utilizing Waste Heat of Engine |
US20150176428A1 (en) * | 2013-12-19 | 2015-06-25 | Mahle International Gmbh | Turbomachine |
WO2017162319A1 (en) * | 2016-03-24 | 2017-09-28 | Robert Bosch Gmbh | Waste heat recovery system |
WO2018137860A1 (en) * | 2017-01-24 | 2018-08-02 | Robert Bosch Gmbh | Gas valve for a heat circuit of a vehicle, and production method for a gas valve |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6228027B2 (en) * | 2014-02-12 | 2017-11-08 | サンデンホールディングス株式会社 | Scroll expander |
DE102015213387A1 (en) * | 2015-07-16 | 2017-01-19 | Robert Bosch Gmbh | Rotary piston pump |
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- 2013-03-13 US US14/385,454 patent/US20150033744A1/en not_active Abandoned
- 2013-03-13 DE DE112013001450.5T patent/DE112013001450T5/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
CN104169527A (en) | 2014-11-26 |
JP5969227B2 (en) | 2016-08-17 |
DE112013001450T5 (en) | 2015-01-22 |
JP2013189931A (en) | 2013-09-26 |
WO2013137352A1 (en) | 2013-09-19 |
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