WO2017038653A1 - スクロール式流体機械およびそのメンテナンス方法 - Google Patents
スクロール式流体機械およびそのメンテナンス方法 Download PDFInfo
- Publication number
- WO2017038653A1 WO2017038653A1 PCT/JP2016/074895 JP2016074895W WO2017038653A1 WO 2017038653 A1 WO2017038653 A1 WO 2017038653A1 JP 2016074895 W JP2016074895 W JP 2016074895W WO 2017038653 A1 WO2017038653 A1 WO 2017038653A1
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- WIPO (PCT)
- Prior art keywords
- unit
- scroll
- main body
- fluid machine
- motor
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 59
- 238000012423 maintenance Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000002265 prevention Effects 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000004519 grease Substances 0.000 description 11
- 238000000926 separation method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Classifications
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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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C2/025—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents the moving and the stationary member having co-operating elements in spiral form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- 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
-
- 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
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- 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
-
- 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
-
- 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
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
-
- 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
- F04C2230/00—Manufacture
- F04C2230/70—Disassembly methods
-
- 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
- F04C2230/00—Manufacture
- F04C2230/80—Repairing methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/805—Fastening means, e.g. bolts
Definitions
- the present invention relates to a scroll type fluid machine and a maintenance method thereof.
- Patent Document 1 states that “the output side of the motor-type drive unit having a horizontal axis is fixed to one side of the mounting plate in the support bracket formed by standing the mounting plate on the base plate, and this mounting plate. By attaching the input side of the main body of the driven rotary machine to the other side in a detachable manner, the output shaft of the motor type drive unit and the input shaft of the main body of the driven rotary machine can be connected. "Rotating machine characterized by the above” is described.
- Patent Document 2 states that “a casing, a fixed scroll provided on the casing and provided with a spiral wrap portion, and a spiral wrap portion overlapping the fixed scroll wrap portion on the surface of the end plate are provided. And a revolving scroll that forms a plurality of compression chambers in combination with the fixed scroll, a drive shaft that is rotatably provided on the casing and drives the revolving scroll, and a rotation of the revolving scroll.
- a scroll fluid machine comprising a plurality of auxiliary crank mechanisms provided in the circumferential direction of the orbiting scroll for preventing orbiting motion, wherein the auxiliary crank mechanism includes an orbiting side bearing portion provided on the orbiting scroll side, and A fixed-side bearing portion provided on the fixed side, and an auxiliary crankshaft connected to the turning-side bearing portion and the fixed-side bearing portion
- auxiliary crank mechanism includes an orbiting side bearing portion provided on the orbiting scroll side, and A fixed-side bearing portion provided on the fixed side, and an auxiliary crankshaft connected to the turning-side bearing portion and the fixed-side bearing portion
- a scroll type fluid machine characterized in that at least one of a revolving side bearing portion and a fixed side bearing portion is accommodated in a boss piece, and the boss piece is connected to the orbiting scroll or the fixed side via an axial column.
- the scroll type fluid machine of Patent Document 2 can be operated and checked by operating the motor unit alone after removing the motor unit (motor (drive source) 15).
- the shaft (spindle 15B) and the spindle 9 are Since it is a separate body and fastened by using a fastening member, the number of parts is large and labor is required for disassembly.
- the shaft and the main shaft portion 9 are separate from each other, misalignment is likely to occur. If misalignment occurs, the load applied to the main bearing increases and the bearing life is reduced.
- an object of the present invention is to provide a scroll fluid machine that can easily separate, assemble, and maintain a compressor main unit and a motor unit, and a maintenance method thereof.
- the present invention includes a main body unit that compresses fluid and a motor unit that drives the main body unit.
- the main body unit includes a fixed scroll, a turning scroll, a main body casing, and the orbiting.
- a rotation prevention mechanism that is held by the scroll and the main body casing and prevents rotation of the orbiting scroll; and the motor unit includes a rotor, a stator that rotates the rotor, and a shaft that rotates integrally with the rotor.
- a motor cover that accommodates the rotor and the stator, a main bearing that is fixed to the inside by the motor cover and supports the shaft, an eccentric portion at a tip of the shaft, and through the eccentric portion
- the main body unit and the motor unit are connected, and the main body casing and the motor
- the bar is fastened by a fastening member.
- a main unit that compresses a fluid in a compression chamber between a fixed scroll and a turning scroll, and a motor unit that drives the main unit by rotating a shaft.
- a fastening member that fastens a main body casing attached to the fixed scroll and a motor cover provided on a radially outer side of the shaft is removed, and an eccentric portion formed at a tip of the shaft is removed from the main body unit to remove the main body.
- a maintenance method for a scroll type fluid machine is provided, wherein the motor unit is separated from the main body unit without disassembling the unit.
- Example 1 is an overall view of a scroll fluid machine in Embodiment 1 of the present invention. It is side surface direction sectional drawing of the scroll type fluid machine in Example 1 of this invention. It is a perspective view in the state where the main body unit and motor unit in Example 1 of the present invention were separated. It is a perspective view in the state where the main body unit and motor unit in Example 1 of the present invention were separated. It is side surface sectional drawing of the state which isolate
- FIG. 1 is a schematic view of a scroll type fluid machine 1 according to the present invention
- FIG. 2 is a sectional view of the scroll type fluid machine 1 in FIG. 1 viewed from the side
- FIGS. 3A and 3B are views of a main unit 19 and a motor unit 20. An example of a separation state is shown.
- the scroll fluid machine 1 in this embodiment shown in FIG. 1 may be a scroll compressor that compresses a specific gas or refrigerant such as air or nitrogen, or may be a scroll vacuum pump.
- the scroll fluid machine 1 includes a main unit 19 that compresses fluid and a motor unit 20 that drives the main unit 19.
- the internal structure of the main unit 19 includes a fixed scroll 2, a orbiting scroll 3 disposed opposite to the fixed scroll 2, and a main body casing 14 that covers the orbiting scroll 3 from the outside in the radial direction.
- spiral wrap portions 2B and 3B are formed on the surfaces of the end plates 2A and 3A, respectively.
- the compression chambers are configured by overlapping the wrap portions 2B and 3B of the fixed scroll 2 and the orbiting scroll 3, respectively.
- the main casing 14 has a cylindrical shape and is open at both ends.
- the fixed scroll 3 is attached to the opening on one end side of the main casing 14, and the motor unit 20 is attached to the opening 22 on the other end side.
- the orbiting scroll 3 is driven by the motor unit 20 and performs an orbiting motion.
- the main unit 19 continuously reduces the compression chamber defined between the wrap portion 2B of the fixed scroll 2 and the wrap portion 3B of the orbiting scroll 3 by the orbiting motion of the orbiting scroll 3, thereby allowing fluid to flow. Compress and discharge.
- the scroll type fluid machine 1 having only one pair of the fixed scroll 2 and the orbiting scroll 3 has been described as an example, but the orbiting scroll 3 having the wrap portions 3B on both sides of the end plate 3A is provided. You may have the fixed scroll 2 on the both sides.
- the orbiting scroll 3 includes a boss portion 9A that accommodates the shaft 6 of the motor unit 20 on the back side of the end plate 3A (the side opposite to the surface on which the wrap portion 3B is formed).
- the boss portion 9A may be formed directly on the rear surface of the end plate 3A of the orbiting scroll 3, or a boss plate 9 is provided at a position spaced from the rear surface of the end plate 3A as shown in FIG. It may be formed on the back surface (surface opposite to the orbiting scroll 3).
- the boss portion 9A provided on the back side of the orbiting scroll 3 is provided with an orbiting bearing 10 that supports a centrifugal force generated by the orbiting motion of the orbiting scroll 2 and a gas load generated by compressing air. .
- the rotation prevention mechanism prevents the rotation of the orbiting scroll 3 and supports the axial gas load from the orbiting scroll 3.
- the anti-spinning mechanism is formed by integrating two eccentric shafts in the axial direction and is held in the radial direction by the casing side auxiliary crank bearing 13, and is rotated following the orbiting scroll 3 to rotate the orbiting scroll 3.
- the auxiliary crankshaft 11 is configured to support the auxiliary crankshaft 11, and the orbiting side auxiliary crank bearing 12 accommodated in the orbiting scroll 3 and the casing side auxiliary crank bearing 13 accommodated in the main body casing 14.
- a rotation prevention mechanism it may replace with the auxiliary
- the auxiliary crankshaft 11 is held from the main body casing 14 and the orbiting scroll 3 via the orbiting side auxiliary crank bearing 12 and the casing side auxiliary crank bearing 13.
- the auxiliary crankshaft 11 is fixed to the main body casing 11 with bolts, and is fixed to the orbiting scroll 3 through an orbiting side auxiliary crank bearing 12 by an interference fit.
- the auxiliary crankshaft 11 may be fitted in a clearance to the turning side auxiliary crank bearing 12 (casing side auxiliary crank bearing 13), and may be fixed to the turning scroll 3 (main body casing 14) by a presser plate.
- the main body casing 14 and the orbiting scroll 3 are opposed to each other in the axial direction (longitudinal direction of the shaft 6) and are held (fixed) in the axial direction via a rotation prevention mechanism.
- the orbiting scroll 3 is not separated from the main body casing 14 when the shaft 6 is pulled out from the main body unit 19 in order to separate the main body unit 19 and the motor unit 20. Thereby, the motor unit 20 can be separated without disassembling the main body unit 19.
- the motor unit 20 has a stator 4 and a rotor 5 that generate power, and a shaft 6 that integrates the rotor 5 by press-fitting and transmits the power to the outside.
- the shaft 6 When the stator 4 applies a rotational force to the rotor 5, the shaft 6 integrated with the rotor 5 rotates.
- the shaft 6 has an eccentric portion 6 ⁇ / b> A, and the eccentric portion 6 ⁇ / b> A can be pulled out only by pulling in the boss portion 9 ⁇ / b> A provided on the back surface of the orbiting scroll 2 when assembling the main body unit 19 and the motor unit 20.
- the eccentric portion 6A is attached to the boss portion 9A with a gap fit) and is detachably attached to the main unit.
- the motor unit 20 further includes a motor cover 21 that houses the stator 4 and the rotor 5.
- the motor cover 21 includes a cylindrical motor casing 17 that covers the stator 4, the rotor 5, and the shaft 6 from the outside in the radial direction, and a flange 15 and a main body unit 19 that are provided in the opening on the main body unit 19 side of the motor casing 17. It is comprised by the end bracket 16 provided in the opening part of the other side.
- the motor casing 17 is fixed to the stator 5 and accommodates the stator 5 and the rotor 6.
- the shaft 6 is supported by the main bearing 7 and the anti-load bearing 8.
- the main bearing 7 and the anti-load bearing 8 are arranged concentrically so that the shaft 6 does not tilt with respect to the axis of the main bearing 7 and the anti-load bearing 8. Thereby, the vibration which generate
- the main bearing 7 is arranged in the motor cover 21, that is, between the flange 15 and the end bracket 16 (on the opposite side of the main body unit 19 with respect to the flange 15).
- the main bearing 7 is fixed in the motor cover 21 by a flange 15.
- the flange 15 is fastened to the motor casing 17.
- the flange 15 may be formed integrally with the motor casing 17. Note that when the main casing 14 and the motor cover 21 are fastened, the flange 15 may be sandwiched between the main casing 14 and the motor casing 17.
- the main bearing 7 and the rotation prevention mechanism are arranged so that the positions in the axial direction (longitudinal direction of the shaft 6) overlap when viewed from the radial direction. That is, the main unit 19 side end surface of the main bearing 7 is arranged to be positioned closer to the main unit 19 side than the motor unit 20 side end surface of the rotation prevention mechanism (casing side auxiliary crank bearing 13).
- the size tends to increase in the axial direction.
- the main bearing 7 is disposed in this space. Thereby, the axial direction dimension of the shaft 6 can be shortened, and the axial direction dimension of the scroll type fluid machine 1 whole can be shortened.
- the main bearing 7 is fixed inside the motor cover 21 by the flange 15. In this way, it is not necessary to attach / detach the main bearing 7 to / from the main unit 19 when attaching / detaching the main unit 19 and the motor unit 20.
- the main bearing 7 can be prevented from moving in the axial direction of the shaft 6 and becoming unstable. Therefore, by providing the main bearing 7 in the motor cover 21, the body unit 19 and the motor unit 20 can be easily attached and detached. Further, the main bearing 7 is not separated from the motor unit 20 when the shaft 6 is pulled out from the body unit 19 in order to separate the body unit 19 and the motor unit 20. As a result, the motor unit 20 can be separated from the main unit 19 without disassembling the motor unit 20. That is, the assembly of the scroll type fluid machine 1 and the replacement work of the main unit 19 and the motor unit 20 are facilitated. In addition, the operation of the motor unit 20 alone and the replacement of parts (including the replacement of the motor when the motor capacity is changed) and grease Maintenance such as supply becomes possible.
- the flange 15 has a step shape in which the radially inner side protrudes toward the main unit 20 from the radially outer side.
- the main bearing 15 is fixed to a radially inner side (portion protruding to the main unit 20 side) of the surface of the flange 15 opposite to the main unit.
- the fastening seating surface 24 with the main unit 20 is on the radially outer side of the flange 15 (the portion not protruding toward the main unit 20). That is, the axial position of at least a part of the main bearing 7 is closer to the tip of the eccentric portion 6 ⁇ / b> A than the axial position of the fastening seat surface 24 with the body unit 20 formed on the flange 15.
- FIG. 7A shows an enlarged view of the slewing bearing 10 according to the present embodiment.
- the eccentric portion 6 ⁇ / b> A of the shaft 6 is supported by the orbiting bearing 10 with respect to the orbiting scroll 3.
- the power of the shaft 6 is transmitted to the orbiting scroll 3 through the orbiting bearing 10.
- the slewing bearing 10 is a ring-shaped slewing bearing inner ring 10A fixed to the shaft 6 by press-fitting or the like, a plurality of slewing bearing rollers 10B provided on the boss portion 9A of the main body unit 19, and a ring shape fixed to the boss portion 9A by press-fitting or the like.
- Slewing bearing outer ring 10C is a ring-shaped slewing bearing inner ring 10A fixed to the shaft 6 by press-fitting or the like, a plurality of slewing bearing rollers 10B provided on the boss portion 9A of the main body unit 19, and a ring shape fixed to the boss portion 9A by press-fitting
- the slewing bearing roller 10B is rotatably held between the slewing bearing inner ring 10A and the slewing bearing outer ring 10C. At the time of maintenance, it is necessary to supply a lubricant such as grease to the plurality of slewing bearing rollers 10B separated on the main unit 19 side (or on the motor unit side).
- the slewing bearing inner ring 10 ⁇ / b> A is formed integrally with the eccentric portion 6 ⁇ / b> A of the shaft 6, thereby constituting the component of the motor unit 20.
- the slewing bearing outer ring 10 ⁇ / b> C is formed integrally with the boss portion 9 ⁇ / b> A, so that it is a constituent element of the main unit 19.
- the main body unit 19 and the motor unit 20 can be easily separated with the slewing bearing inner ring 10A and the slewing bearing roller 10B as a boundary, and reassembly can be facilitated. Further, by forming the shaft 6 and the eccentric portion 6A as one body, the number of parts can be reduced, and the labor for assembly and disassembly can be reduced. In addition, since the slewing bearing roller 10B is exposed at the time of disassembly, maintenance such as supply of grease to the slewing bearing roller 10B, replacement of parts, and visual confirmation is facilitated.
- the slewing bearing roller 10B is used as a component on the main unit 19 side.
- the slewing bearing roller 10B is exposed when the main unit 19 and the motor unit 20 are separated, for example, FIG.
- the slewing bearing inner ring 10A may be a component on the main unit 19 side
- the slewing bearing roller 10B and the slewing bearing outer ring 10C may be components on the motor unit 20 side.
- 7B may be integrated with the balance weight 23 and may be a component on the motor unit 20 side.
- the fastening member that fastens the motor cover 21 and the main body casing 14 is removed, the main body unit 19 and the motor unit 20 are separated, and maintenance is performed.
- the eccentric portion 6A of the shaft 6 is detached from the main unit 19 (the boss portion 9A).
- the slewing bearing inner ring 10 ⁇ / b> A is removed integrally with the shaft 6.
- the slewing bearing outer ring 10 ⁇ / b> C remains on the main unit 19 side even after the motor unit 20 is removed.
- the eccentric part 6A of the shaft 6 is attached to the boss part 9A (the turning bearing inner ring 10A is attached to the turning bearing roller 10B) with a clearance fit.
- the main body unit 19 and the motor unit 20 can be separated by simply removing the fastening bolt 18 and pulling out the main body unit 19 in the axial direction. Thereby, each unit can be easily replaced with a new one, or the output of the motor unit 20 can be easily changed. Further, since the motor unit 20 has the main bearing 7, it is possible to check the operation and performance of the motor unit 20 alone after separating each unit. Further, in the main unit 19, the slewing bearing 10 (the slewing bearing roller 10B) and the casing side auxiliary crank bearing 13 are exposed from the back side, so that maintenance such as replacement of parts, visual confirmation and supply of lubricant such as grease can be easily performed. It becomes.
- the eccentric portion 6A of the shaft 6 is inserted into the boss portion 9A of the main body unit 19, and the motor cover 21 and the main body casing 14 are fastened with a fastening member (for example, the fastening bolt 18 is connected to the motor cover 21 and the main body).
- the motor unit 20 is assembled with the main body unit 19 by assembling it into the bolt insertion hole provided in the casing 14 and the scroll fluid machine 1 is assembled again.
- the scroll fluid machine 1 can be easily assembled after the main unit 19 and the motor unit 20 are assembled separately.
- FIG. 4 is a side sectional view in a separated state.
- the eccentric portion 6A of the shaft 6 is formed integrally with the shaft 6 and is a component on the motor unit 20 side, so that the eccentric portion 6A of the shaft 6 is separated when the main unit 19 and the motor unit 20 are separated. Is removed from the main unit 19. Therefore, it is possible to visually check the grease of the slewing bearing 10 of the main unit 19 and to supply the grease without further disassembling the main unit 19, thereby facilitating maintenance.
- the eccentric portion 6A of the shaft 6 is formed integrally with the shaft 6, and is configured to be detached from the main unit 19 and the motor unit 20 to the motor unit side integrally with the shaft 6 at the time of separation. In such a configuration, for example, the shaft 6 and the eccentric portion 6A may be fastened by a bolt, and the shaft 6 and the eccentric portion 6A may be separated by removing the bolt.
- the area of the opening 22 on the motor unit 20 side of the main body casing 14 is set between the tip of the eccentric portion 6A and the flange 15 as viewed from the axial direction of the shaft 6 (the portion protruding from the flange 15 toward the main body unit 19).
- the projected area of the motor unit 19 in () is larger than the projected area when the parallel light is applied from the axial direction of the shaft 6 to the portion protruding from the flange 15 toward the main body unit 19 side. That is, the diameter ⁇ A of the opening 22 of the main body casing 14 is made larger than the maximum diameter 22 ⁇ a of the motor unit 19 between the tip of the eccentric portion 6A and the flange 15 (a portion protruding from the flange 15 toward the main body unit 19).
- the motor unit 20 is partly inserted into the main body casing 14 through the opening 22 of the main body casing 14 without being inclined.
- a part of the motor unit 20 can be taken out from the inside of the main body casing.
- FIG. 5 shows a modification of this embodiment.
- the balance weight 23 is arranged in the motor cover 21, that is, on the side farther from the main body unit 19 than the flange 15.
- the area of the opening 22 of the main casing 14 is viewed from the axial direction between the tip of the eccentric portion 6 ⁇ / b> A of the motor unit 19 and the flange. It may be larger than the projected area. That is, the area of the opening 22 of the main body casing 14 may be smaller than the cross-sectional area viewed from the axial direction of the balance weight 23.
- the balance weight 23 By arranging the balance weight 23 in the motor cover 21, it is not necessary to enlarge the opening 22 of the main body casing 14 even when the balance weight 23 is enlarged. Since it is not necessary to make the opening 22 large, it is not necessary to make the main casing 14 itself large, and the scroll fluid machine 1 as a whole can be reduced in size and weight.
- Example 2 of the present invention will be described with reference to FIG.
- the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- a fastening position between the main body unit 19 and the motor unit 20 will be described.
- FIG. 6 is a view of the main unit 19 as seen from the back side.
- the fastening position of the main unit 19 and the motor unit 20 is radially inward of the outer peripheral surface of the fixed scroll 2, the fastening position is difficult to see behind the fixed scroll 2. Moreover, it will hit the fixed scroll 2 at the time of fastening work or separation work. Therefore, maintenance work cannot be easily performed unless the fixed scroll 2 is removed. Therefore, in this embodiment, the fastening position (position of the fastening seat surface 24) between the main body unit 19 and the motor unit 20 is set radially outside the outer peripheral surface of the fixed scroll 2 with the center of the shaft 6 as a reference. As a result, it is not necessary to remove the fixed scroll 2 when the main unit 19 is separated, and the main unit 19 and the motor unit 20 can be separated with the fixed scroll attached, thereby enabling easy maintenance.
- the distance ⁇ D of the fastening position (position of the fastening seating surface 24) from the center of the shaft 6 is made larger than the distance ⁇ d of the auxiliary crank bearing 13 from the center of the shaft 6. That is, the fastening position between the main body unit 19 and the motor unit 20 is provided on the radially outer side than the positions of the rotation prevention mechanisms (the auxiliary crankshaft 11, the turning side auxiliary crank bearing 12, and the casing side auxiliary crank bearing 13).
- the orbiting scroll 3 is thermally expanded.
- the auxiliary crankshaft 11 between the orbiting scroll 3 and the main body casing is inclined, and the orbiting radius of the orbiting scroll 3 is increased.
- the wrap portion 2B of the fixed scroll 2 and the wrap portion 3B of the orbiting scroll 3 may come into contact with each other, and reliability may be reduced.
- the fastening position between the main unit 19 and the motor unit 20 is arranged outside the rotation prevention mechanism.
- the thermal expansion of the orbiting scroll 3 is also transmitted to the main body casing 14 via the rotation prevention mechanism, but the main body casing 14 is fastened to the motor cover 21 by the fastening bolts 18 on the outer side in the radial direction than the rotation prevention mechanism. Deformation due to thermal expansion of the casing 18 can be suppressed. Thereby, it is possible to suppress the turning radius of the orbiting scroll 3 from increasing, and it becomes possible to ensure the reliability and compression performance of the orbiting scroll 3.
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Abstract
Description
2 固定スクロール
3 旋回スクロール
4 ステータ
5 ロータ
6 シャフト
6A 偏心部
7 主軸受
8 反負荷軸受
9 ボスプレート
9A ボス部
10 旋回軸受
10A 旋回軸受内輪
10B 旋回軸受ローラ
10C 旋回軸受外輪
11 補助クランクシャフト
12 旋回側補助クランク軸受
13 ケーシング側補助クランク軸受
14 本体ケーシング
15 フランジ
16 エンドブラケット
17 モータケーシング
18 締結ボルト
19 本体ユニット
20 モータユニット
21 モータカバー
22 開口部
23 バランスウェイト
24 締結座面
Claims (21)
- 流体を圧縮する本体ユニットと、
前記本体ユニットを駆動するモータユニットとを備え、
前記本体ユニットは、固定スクロールと、旋回スクロールと、本体ケーシングと、前記旋回スクロールおよび前記本体ケーシングに保持され、前記旋回スクロールの自転を防止する自転防止機構とを有し、
前記モータユニットは、ロータと、前記ロータを回転させるステータと、前記ロータと一体に回転するシャフトと、前記ロータおよび前記ステータを収容するモータカバーと、前記モータカバーによって内部に固定され、前記シャフトを支持する主軸受とを有し、
前記シャフトの先端に偏心部を有し、前記偏心部を介して前記本体ユニットと前記モータユニットとが接続し、前記本体ケーシングと前記モータカバーとが締結部材で締結していることを特徴とするスクロール式流体機械。 - 前記モータカバーは前記シャフトの径方向外側にあるモータケーシングと、前記モータケーシングの前記本体ユニット側の開口にあるフランジとを有することを特徴とする請求項1に記載のスクロール式流体機械。
- 前記本体ユニットと前記モータユニットとは、前記フランジを介して締結することを特徴とする請求項2に記載のスクロール式流体機械。
- 前記本体ユニットと前記モータユニットとの締結位置は前記固定スクロールの外周面よりも径方向外側であることを特徴とする請求項1に記載のスクロール式流体機械。
- 前記本体ユニットは前記旋回スクロールの自転を防止する自転防止機構を有し、前記本体ユニットと前記モータユニットとの締結位置は前記自転防止機構よりも径方向外側であることを特徴とする請求項1に記載のスクロール式流体機械。
- 前記本体ケーシングの前記モータユニット側には開口部を設け、前記開口部の面積は前記モータユニットの前記偏心部と前記フランジとの間における軸方向から見た投影面積よりも大きいことを特徴とする請求項1に記載のスクロール式流体機械。
- 前記モータユニットは前記フランジと前記偏心部との間で前記シャフトの径方向外側にバランスウェイトを有し、前記モータユニットの前記偏心部と前記フランジとの間における軸方向から見た投影面積は、前記バランスウェイトを含む面積であることを特徴とする請求項6に記載のスクロール式流体機械。
- 前記フランジよりも前記本体ユニットから離れた側で前記シャフトの径方向外側にバランスウェイトを有することを特徴とする請求項1に記載のスクロール式流体機械。
- 前記偏心部を支持する旋回軸受を備え、
前記本体ユニットは前記旋回軸受の外輪を有し、前記モータユニットは前記旋回軸受の内輪を有することを特徴とする請求項1に記載のスクロール式流体機械。 - 前記偏心部を支持する旋回軸受を備え、
前記本体ユニットは前記旋回軸受の内輪を有し、前記モータユニットは前記旋回軸受の外輪を有することを特徴とする請求項1に記載のスクロール式流体機械。 - 前記本体ユニットと前記モータユニットとは前記偏心部を介して着脱可能に接続していることを特徴とする請求項1に記載のスクロール式流体機械。
- 前記主軸受および前記自転防止機構の少なくとも一部は径方向から見て軸方向位置が重なることを特徴とする請求項1に記載のスクロール式流体機械。
- 前記フランジの径方向内側は径方向外側よりも前記本体ユニット側に突出していることを特徴とする請求項2に記載のスクロール式流体機械。
- 前記フランジは、前記本体ユニットと締結部材にて締結する締結座面を有し、前記主軸受の少なくとも一部の軸方向位置は前記締結座面の軸方向位置よりも前記偏心部の先端に近いことを特徴とする請求項2に記載のスクロール式流体機械。
- 固定スクロールと旋回スクロールとの間にある圧縮室内の流体を圧縮する本体ユニットと、シャフトが回転することにより、前記本体ユニットを駆動するモータユニットとを、
前記固定スクロールに取り付けられた本体ケーシングと、前記シャフトの径方向外側に設けられたモータカバーとを締結する締結部材を取り外し、
前記シャフトの先端に形成された偏心部を前記本体ユニットから取り外して前記本体ユニットを分解せずに前記本体ユニットから前記モータユニットを分離することを特徴とするスクロール式流体機械のメンテナンス方法。 - 前記偏心部は前記シャフトと一体で前記本体ユニットから取り外すことを特徴とする請求項15に記載のスクロール式流体機械のメンテナンス方法。
- 前記本体ユニットと前記モータユニットとを分離した後、前記旋回スクロールを前記シャフトに対して支持する旋回軸受に潤滑剤を供給することを特徴とする請求項15に記載のスクロール式流体機械のメンテナンス方法。
- 前記旋回軸受の内輪を前記シャフトと一体で取り外し、前記旋回軸受のローラに潤滑剤を供給することを特徴とする請求項17に記載のスクロール式流体機械のメンテナンス方法。
- 前記旋回軸受に潤滑剤を供給した後、前記本体ユニットと前記モータユニットとを組み付けることを特徴とする請求項17に記載のスクロール式流体機械のメンテナンス方法。
- 前記固定スクロールを前記ケーシングに取り付けられた状態で前記本体ユニットと前記モータユニットとを分離することを特徴とする請求項15に記載のスクロール式流体機械のメンテナンス方法。
- 前記モータユニットの一部を前記本体ケーシングから前記本体ケーシングの他端側の開口部を通して取り出すことを特徴とする請求項15に記載のスクロール式流体機械のメンテナンス方法。
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CN201680049924.8A CN107949703A (zh) | 2015-08-28 | 2016-08-26 | 涡旋式流体机械及其维护方法 |
EP20175317.5A EP3715635A1 (en) | 2015-08-28 | 2016-08-26 | Scroll-type fluid machine and maintenance method for same |
US15/755,827 US11441559B2 (en) | 2015-08-28 | 2016-08-26 | Scroll fluid machine having separable main body unit and motor unit |
CN202110398904.4A CN113187723B (zh) | 2015-08-28 | 2016-08-26 | 涡旋式流体机械及其维护方法 |
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