CN105736367B - Screw compressor and refrigerating plant - Google Patents
Screw compressor and refrigerating plant Download PDFInfo
- Publication number
- CN105736367B CN105736367B CN201510983192.7A CN201510983192A CN105736367B CN 105736367 B CN105736367 B CN 105736367B CN 201510983192 A CN201510983192 A CN 201510983192A CN 105736367 B CN105736367 B CN 105736367B
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- Prior art keywords
- refrigerant
- discharge chambe
- mentioned
- screw compressor
- access
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- 239000003507 refrigerant Substances 0.000 claims abstract description 96
- 230000007246 mechanism Effects 0.000 claims abstract description 74
- 230000006835 compression Effects 0.000 claims abstract description 67
- 238000007906 compression Methods 0.000 claims abstract description 67
- 230000002411 adverse Effects 0.000 claims abstract description 22
- 239000003921 oil Substances 0.000 description 40
- 239000010687 lubricating oil Substances 0.000 description 18
- 239000000446 fuel Substances 0.000 description 12
- 238000004804 winding Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 239000004519 grease Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
- F04C18/0223—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving with symmetrical double wraps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
Screw compressor and refrigerating plant.The screw compressor of the present invention can suppress damage caused by pressure difference caused by inside when stopping.Screw compressor (101) possesses compression mechanism (15), suction space forming portion (24a) and access forming portion (24a).Compression mechanism (15) has fixed scroll (24) and movable scroll (26).Movable scroll (26) engages with fixed scroll (24) and forms the discharge chambe (40) that refrigerant is compressed.Suction space forming portion (24a) forms the suction space (24c) for importing refrigerant to discharge chambe (40).Access forming portion (24a) forms the access (24h) for connecting discharge chambe (40) and suction space (24c).Access (24h) is provided with the anti-locking mechanism (25) of adverse current.Countercurrently anti-locking mechanism (25) only allows refrigerant to be flowed from suction space (24c) to discharge chambe (40).
Description
Technical field
The present invention relates to screw compressor and refrigerating plant.
Background technology
In possessing the refrigerating plant of screw compressor, when compressor stops in freeze cycle operation process, due to
Pressure differential between the refrigerant gas of the high pressure of compressor discharge side and the refrigerant gas of the low pressure of compressor suction side and
Movable scroll is set to be rotated to the direction opposite with during refrigerant compression.When movable scroll inverts, the pressure inside compressor
The volume of contracting room increases, the refrigerant gas expansion in discharge chambe.Thus, when the pressure of discharge chambe is less than compressor suction side
During the pressure in space, power caused by pressure difference is born in the winding end portion of the scrollwork (scroll wraps) of movable scroll, it is possible to is damaged
The scrollwork of movable scroll.
In the past, as the method for suppressing movable scroll reversion, check-valves is set using in the space of compressor discharge side
Deng the structure of the anti-locking mechanism of adverse current.But the flow path resistance of compressor discharge side becomes big, it is possible to compressor when generally operating
Efficiency reduce.
In addition, as patent document 1 (Japanese Unexamined Patent Publication 2014-101858 publications) is open, uses and compressing sometimes
The space of machine suction side sets the structure of the anti-locking mechanism of the adverse current such as check-valves.But in this case, pressed inside compressor
During change, movable scroll is inverted sometimes.Also, in pressure equalizing, the refrigerant gas in discharge chambe sometimes
Expand and cause the pressure of discharge chambe to reduce, and the discharge chambe of suction side completely closes the sky between portion and the anti-locking mechanism of adverse current
Between pressure increase, the winding end portion of the scrollwork of movable scroll is by power caused by pressure difference.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2014-101858 publications
The content of the invention
It is an object of the present invention to provide the vortex of the damage caused by can suppressing inside when stopping caused by pressure difference
Compressor and the refrigerating plant for possessing the screw compressor.
Means for solving the problems
The screw compressor of the first aspect of the present invention possesses compression mechanism, suction space forming portion and access and formed
Portion.Compression mechanism has fixed scroll and movable scroll.Movable scroll engages with fixed scroll and forms refrigerant
The discharge chambe compressed.Suction space forming portion forms the suction space for importing refrigerant to discharge chambe.Access forming portion
Form the access for connecting discharge chambe and suction space.Access is provided with the anti-locking mechanism of adverse current.Countercurrently anti-locking mechanism
Only refrigerant is allowed to be flowed from suction space to discharge chambe.
According to the screw compressor of first aspect, the reversion of movable scroll when passing through stopping will press in pressure equalizing
Refrigerant gas in the suction space that power rises imported into the discharge chambe as low pressure from suction space through access, to subtract
Pressure differential between small discharge chambe and suction space.Thus, the power for putting on the winding end portion of the scrollwork of movable scroll subtracts
It is small, the damage of the scrollwork of movable scroll can be suppressed.Therefore, inside when the screw compressor of first aspect can suppress to stop
Damage caused by caused pressure difference.
For the screw compressor of the second aspect of the present invention in the screw compressor of first aspect, access will be imported into system
Cryogen and discharge chambe after being just fully closed and suction space connect.
According to the screw compressor of second aspect, access is just fully closed with being imported into after refrigerant from suction space
Discharge chambe afterwards completely closes discharge chambe connection.The winding end portion of the scrollwork of movable scroll bears to completely close discharge chambe
Refrigerant pressure with suction space refrigerant pressure.Using access make to completely close discharge chambe and suction space it
Between pressure differential reduce.Therefore, using will be fully off discharge chambe can with sucking that the access that connects of space makes to put on
The power in the winding end portion of the scrollwork of dynamic vortex part reduces.
For the screw compressor of the third aspect of the present invention in the screw compressor of first aspect or second aspect, adverse current is anti-
Locking mechanism is check-valves.
The screw compressor of either side of the screw compressor of the fourth aspect of the present invention in first to the third aspect
In, suck space forming portion and access forming portion is included in compression mechanism.
The screw compressor of either side of the screw compressor of the fifth aspect of the present invention in first to the third aspect
In, suction space forming portion includes the suction line being connected with compression mechanism, and access forming portion includes the company being connected with suction line
Siphunculus.
The refrigerating plant of the sixth aspect of the present invention possess first to the 5th aspect in either side screw compressor,
Condenser, expansion mechanism and evaporator.
Because the refrigerating plant of the sixth aspect of the present invention possesses the screw compressor of the first to the 5th aspect, therefore can
Improve reliability during operating.
Invention effect
The screw compressor of the first aspect of the present invention to the 5th aspect can suppress pressure difference caused by inside when stopping
Caused damage.
The refrigerating plant of the sixth aspect of the present invention can improve reliability during operating.
Brief description of the drawings
Fig. 1 is the refrigerant loop figure of the refrigerating plant of first embodiment.
Fig. 2 is the longitudinal section of screw compressor.
Fig. 3 is the upward view of fixed scroll.
Fig. 4 is the top view of movable scroll.
Fig. 5 is the upward view of the fixed scroll of the second scrollwork and discharge chambe that show movable scroll.
Fig. 6 is the sectional view of compression mechanism.
Fig. 7 is the figure of the position relationship of the second scrollwork of the first scrollwork and movable scroll for showing fixed scroll.
Fig. 8 is the figure of the position relationship of the second scrollwork of the first scrollwork and movable scroll for showing fixed scroll.
Fig. 9 is the figure of the position relationship of the second scrollwork of the first scrollwork and movable scroll for showing fixed scroll.
Figure 10 is the sectional view of the compression mechanism of second embodiment.
Label declaration
15：Compression mechanism
19：Suction line
24：Fixed scroll
26：Movable scroll
40：Discharge chambe
24a：First end plate (suction space forming portion)
24a：First end plate (access forming portion)
24c：Main inlet hole (suction space)
24h：Access
25：Countercurrently anti-locking mechanism
100：Refrigerating plant
101：Screw compressor
103：Outdoor heat converter (condenser during cooling operation)
103：Outdoor heat converter (evaporator during heating operation)
104：Expansion mechanism
105：Indoor heat converter (evaporator during cooling operation)
105：Indoor heat converter (condenser during heating operation)
119：Suction line
124i：Communicating pipe
Embodiment
<First embodiment>
The screw compressor of the first embodiment of the present invention is filled with the freezing for possessing the screw compressor referring to the drawings
Put and illustrate.
(1) structure of refrigerating plant
The refrigerating plant 100 of present embodiment is illustrated.Refrigerating plant 100 is, for example, air-conditioning device.Fig. 1 is freezing
The refrigerant loop figure of device 100.Refrigerating plant 100 is mainly by screw compressor 101, four tunnel switching valves 102, outdoor heat exchange
Device 103, expansion mechanism 104 and indoor heat converter 105 are formed.In Fig. 1, the refrigeration during arrow expression cooling operation of solid line
The flowing of refrigerant when the flowing of agent, the arrow of dotted line represent heating operation.
The freeze cycle of refrigerating plant 100 during to cooling operation illustrates.First, screw compressor 101 is to low pressure
Gas refrigerant be compressed and discharge the gas refrigerant of high pressure.The refrigerant discharged from screw compressor 101 passes through four
Road switching valve 102 and be provided to outdoor heat converter 103.Outdoor heat converter 103 make high pressure gas refrigerant condense and
Discharge the liquid refrigerant of high pressure.From the refrigerant that outdoor heat converter 103 is discharged by being used as the expansion valve of expansion mechanism 104
And the refrigerant of the gas-liquid mixture phase as low pressure, and it is provided to indoor heat converter 105.Indoor heat converter 105 makes
The liquid refrigerant included in the refrigerant of the gas-liquid mixture phase of low pressure evaporates and discharges the gas refrigerant of low pressure.From interior
The gas refrigerant for the low pressure that heat exchanger 105 is discharged is supplied again to screw compressor 101.
In cooling operation, outdoor heat converter 103 plays a role as condenser, the conduct of indoor heat converter 105
Evaporator and play a role.In this case, room is made using the evaporation latent heat of caused refrigerant in heat exchanger 105 indoors
It is interior cooled.On the other hand, in heating operation, by switching four tunnel switching valves 102, so as to the conduct of outdoor heat converter 103
Evaporator and play a role, indoor heat converter 105 plays a role as condenser.In this case, utilization is hot indoors
The condensation latent heat of caused refrigerant makes indoor be heated in exchanger 105.
(2) structure of screw compressor
Below, the screw compressor 101 that refrigerating plant 100 possesses is illustrated.Screw compressor 101 is to utilize two
The compressor that scroll element is compressed to refrigerant, described two scroll elements have the scrollwork for the scroll being engaged with each other.
Screw compressor 101 is the screw compressor of high-low pressure dome type.
Fig. 2 is the longitudinal section of screw compressor 101.Screw compressor 101 is mainly by shell 10, compression mechanism 15, branch
Bearing portion part 23, drive motor 16, lower bearing 60, crank axle 17, suction line 19 and discharge pipe 20 are formed.Screw compressor 101
Have the function that to be compressed refrigerant gas in the refrigerant loop of refrigerating plant 100.Below, to screw compressor
101 each inscape illustrates.
(2-1) shell
Shell 10 by substantially cylindric main part housing department 11, be welded in the upper of main part housing department 11 airtight shape
It is welded in the bowl-shape bottom wall part 13 of the bottom of main part housing department 11 the bowl-shape upper wall portions 12 of end and airtight shape
Form.Shell 10 in the case of the inside and outside pressure and temperature change of shell 10 by being less likely to occur deformation and breakage
Rigid element is molded.Shell 10 is configured to, main part housing department 11 it is substantially cylindric axially along vertical.
Be accommodated with the inside of shell 10 compression mechanism 15, configuration the lower section of compression mechanism 15 supporting member 23, match somebody with somebody
Put in the drive motor 16 of the lower section of supporting member 23 and the crank axle 17 that is configured in a manner of extending along vertical etc..
It is welded in the wall portion of shell 10 20 airtight shape of suction line 19 and discharge pipe.
In the bottom of shell 10 formed with the trapped fuel space 10a for accumulating lubricating oil.Lubricating oil is used in screw compressor 101
The lubricity of the grade sliding part of compression mechanism 15 is kept in operation process well.
(2-2) compression mechanism
Compression mechanism 15 is accommodated in the inside of shell 10, the refrigerant gas of low-temp low-pressure is aspirated and compressed and
Discharge the refrigerant gas of HTHP (hereinafter, referred to as " compression refrigerant ").Compression mechanism 15 is mainly by fixed scroll 24
Formed with movable scroll 26.Fixed scroll 24 is fixed in shell 10.Movable scroll 26 is relative to fixed scroll 24
Carry out revolution motion.Fig. 3 is the plan of the fixed scroll 24 from vertical lower section.Fig. 4 is from vertical
The plan for the movable scroll 26 just observed.
Fixed scroll 24 has first end plate 24a and is erectly formed at the of first end plate 24a involute shape
One scrollwork 24b.In first end plate 24a formed with main inlet hole 24c.Main inlet hole 24c is by suction line 19 and compression described later
The space that room 40 connects.Main inlet hole 24c is formed for the refrigerant gas of low-temp low-pressure to be imported into from suction line 19
The suction space of discharge chambe 40.First end plate 24a central portion formed with tap 41, in first end plate 24a upper surface
Formed with the expansion recess 42 connected with tap 41.It is the upper surface for being hollowly arranged at first end plate 24a to expand recess 42
Space.Lid 44 is fixed with by bolt 44a in a manner of it will be enlarged by recess 42 and block in the upper surface of fixed scroll 24.
Fixed scroll 24 and lid 44 are close to and sealed across pad (not shown).Lid 44, which is covered in, to be expanded on recess 42, from
And form the silence space 45 for the operation noise noise reduction for making compression mechanism 15.In fixed scroll 24 formed with the first compression refrigerant
Stream 46, the first compression refrigerant stream 46 connect with silence space 45 and in the lower surface openings of fixed scroll 24.Such as
Shown in Fig. 3, in oil groove 24e of the first end plate 24a lower surface formed with C word shapes.
Movable scroll 26 has the second end plate 26a and is erectly formed at the of the second end plate 26a involute shape
Two scrollwork 26b.The second end plate 26a lower surface central portion formed with upper end bearing 26c.In movable scroll 26 formed with confession
Oily pore 63.Fuel feeding pore 63 connects the second end plate 26a upper surface peripheral part with the space of upper end bearing 26c inner side.
Fig. 4 shows the end i.e. winding end portion 26d in the second scrollwork 26b outside.
Fixed scroll 24 and movable scroll 26 form discharge chambe 40, and the discharge chambe 40 is by the first scrollwork 24b
Engaged with the second scrollwork 26b and surrounded and formed by first end plate 24a, the first scrollwork 24b, the second end plate 26a and the second scrollwork 26b
Space.The volume of discharge chambe 40 is gradually reduced by the revolution motion of movable scroll 26.Revolved round the sun in movable scroll 26
During, the first end plate 24a of fixed scroll 24 and the first scrollwork 24b lower surface and the second end plate of movable scroll 26
26a and the second scrollwork 26b upper surface slide contact.Below, by the face for the fixed scroll 24 slided with movable scroll 26
Referred to as thrust sliding surface 24d.Fig. 5 is the second scrollwork 26b position and the fixation whirlpool of discharge chambe 40 for showing movable scroll 26
The upward view of rotating part 24.In Figure 5, shadow region represents the thrust sliding surface 24d of fixed scroll 24.In Figure 5, thrust is slided
Dynamic face 24d outer rim represents the track of the second end plate 26a of the movable scroll 26 of revolution outer rim.As shown in figure 5, fixed whirlpool
The oil groove 24e of rotating part 24 is formed at first end plate 24a lower surface in a manner of being contained in thrust sliding surface 24d.
Fig. 6 is the sectional view of compression mechanism 15.Fig. 6 schematically shows the suction line being connected with main inlet hole 24c
19.Fixed scroll 24 first end plate 24a formed with the access for connecting discharge chambe 40 and main inlet hole 24c
24h.Access 24h is provided with the anti-locking mechanism 25 of adverse current.Countercurrently anti-locking mechanism 25 allows refrigerant from main inlet hole 24c to pressure
Flow and forbid refrigerant to be flowed from discharge chambe 40 to main inlet hole 24c in contracting room 40.Countercurrently anti-locking mechanism 25 is, for example, non-return
Valve.In the present embodiment, the first end plate 24a of fixed scroll 24 is the portion to form main inlet hole 24c and access 24h
Part.
Fig. 7 to Fig. 9 is second scrollwork 26bs of the first scrollwork 24b with movable scroll 26 for showing fixed scroll 24
The figure of position relationship.When screw compressor 101 generally operates, when passing through 15 compression refrigerant of compression mechanism, with movable
The revolution motion of scroll 26, the second scrollwork 26b position are changed periodically by Fig. 7, Fig. 8, Fig. 9 and Fig. 7 order.Compressor
The discharge chambe 40 of structure 15 is made up of the first discharge chambe 40a, the second discharge chambe 40b and the 3rd discharge chambe 40c.With movable scroll
26 revolution motion, refrigerant are directed to the first discharge chambe 40a and the second discharge chambe 40b from main inlet hole 24c, then, the
One discharge chambe 40a and the second discharge chambe 40b volume separately reduce.Thus, refrigerant is in the first discharge chambe 40a and
Two discharge chambe 40b are compressed.First discharge chambe 40a and the second discharge chambe 40b converge during being compressed to refrigerant
And turn into the 3rd discharge chambe 40c.In the 3rd discharge chambe 40c, refrigerant is set to enter one by the revolution motion of movable scroll 26
Step compression.Tap 41 is directed in the refrigerant that the 3rd discharge chambe 40c is compressed.
In the figure 7, be imported into after refrigerant from main inlet hole 24c be just fully closed after the first discharge chambe 40a conducts
Shadow region and be illustrated.In fig. 8, be imported into after refrigerant from main inlet hole 24c be just fully closed after the second compression
Room 40b is illustrated as shadow region.Below, as needed, using the shown in the figure 7 as shadow region first compression
Room 40a is referred to as first and completely closes discharge chambe 40a, and the second discharge chambe 40b shown in fig. 8 as shadow region is referred to as
Second completely closes discharge chambe 40b.The access 24h of fixed scroll 24 can be with the process of revolution of movable scroll 26
One completely closes the position opening that discharge chambe 40a and second completely closes the sides of discharge chambe 40b two connection.That is, access 24h is scheming
The 7 shadow region region openings overlapping with Fig. 8 shadow region.
(2-3) supporting member
Supporting member 23 is configured in the lower section of compression mechanism 15.The outer peripheral face of supporting member 23 and the inner surface gas of shell 10
Engage close shape.Thus, the inner space of shell 10 into the high-pressure space S1 of the lower section of supporting member 23 and is used as branch by zoning
The upper space S2 of the superjacent air space of bearing portion part 23.Supporting member 23 load fixed scroll 24, and through geneva cross 39 and
Movable scroll 26 is together clamped with fixed scroll 24.Geneva cross 39 is to be used to prevent the spinning motion of movable scroll 26
Endless member.In the peripheral part of supporting member 23, along vertical insertion formed with the second compression refrigerant stream 48.The
Two compression refrigerant streams 48 connect in the upper surface of supporting member 23 with the first compression refrigerant stream 46, and in supporting member
23 lower surface connects with high-pressure space S1.
Crank chamber S3 is hollowly provided with the upper surface of supporting member 23.Passed through in supporting member 23 formed with supporting member
Through hole 31.Lower surface central portion of the supporting member through hole 31 from crank chamber S3 bottom central part to supporting member 23 is along vertical
Direction penetrates supporting member 23.Below, by a part for supporting member 23 and be the part formed with supporting member through hole 31
Referred to as upper bearing 32.In supporting member 23 formed with way to cycle oil 23a, the way to cycle oil 23a is by the inner surface of shell 10
Neighbouring high-pressure space S1 connects with crank chamber S3.
(2-4) drive motor
Drive motor 16 is disposed on brushless DC (direct current) motor of the lower section of supporting member 23.Drive motor 16 mainly by
The rotor 52 for being fixed in the stator 51 of the inner surface of shell 10 and being configured in the inner side of stator 51 provided with air gap is formed.
The outer peripheral face of stator 51 is provided with multiple portions of cutting core, it is described cut core portion from the upper surface of stator 51 to
Lower surface and otch is formed with being circumferentially spaced apart predetermined distance.Portion's formation cut core in main part housing department 11 and stator
The motor cooling channel 55 extended between 51 along vertical.
Rotor 52 links with penetrating the crank axle 17 of its pivot along vertical.Rotor 52 through crank axle 17 and with pressure
Contracting mechanism 15 connects.
(2-5) lower bearing
Lower bearing 60 is configured in the lower section of drive motor 16.The outer peripheral face of lower bearing 60 and the inner surface gas of shell 10
Engage close shape.Lower bearing 60 supports crank axle 17.Oil separation plate 73 is installed in the upper end of lower bearing 60.Oil separation plate
73 be to be accommodated in the flat part inside shell 10.Oil separation plate 73 is fixed in the upper surface of lower bearing 60.
(2-6) crank axle
Crank axle 17 is accommodated in the inside of shell 10.Crank axle 17 is configured to it axially along vertical.Crank
Axle 17 has the axle center of its upper end relative to the slightly off shape in the axle center of the part in addition to upper end.Crank axle 17
With counterweight 18.Counterweight 18 is closely fixed at the height and position of the lower section of supporting member 23 and the top of drive motor 16
In crank axle 17.
Crank axle 17 penetrates the pivot of rotor 52 along vertical and linked with rotor 52.The upper end of crank axle 17
Upper end bearing 26c is embedded in, so as to which crank axle 17 is connected with movable scroll 26.Crank axle 17 is by upper bearing 32 and bottom axle
Hold 60 supports.
Crank axle 17 internally has along its axially extending main oil passage 61.The upper end of main oil passage 61 connects with grease chamber 83
Logical, the grease chamber 83 is formed by the upper surface of crank axle 17 and the second end plate 26a lower surface.Grease chamber 83 is through the second end plate 26a
Fuel feeding pore 63 and connected with thrust sliding surface 24d and oil groove 24e, and compressed room 40 finally connects with low-voltage space S2.
The lower end of main oil passage 61 is impregnated in trapped fuel space 10a lubricating oil.
Crank axle 17 has secondary from the first secondary oil passage 61a of the main branch of oil passage 61, the second secondary oil passage 61b and the 3rd
Oil passage 61c.First secondary oil passage 61a, the second secondary secondary oil passage 61c of oil passage 61b and the 3rd are horizontally extending.First
Sliding surface openings of the secondary oil passage 61a in crank axle 17 and the upper end bearing 26c of movable scroll 26.Second secondary oil passage 61b
In the sliding surface opening of crank axle 17 and the upper bearing 32 of supporting member 23.3rd secondary oil passage 61c is in crank axle 17 with
The sliding surface opening of portion's bearing 60.
(2-7) suction line
Suction line 19 is for the refrigerant in refrigerant loop to be imported from the outside of shell 10 to compression mechanism 15
Pipe.It is embedded in the upper wall portions 12 of shell 10 19 airtight shape of suction line.Suction line 19 penetrates upper space S2 along vertical,
And inner end is embedded in the main inlet hole 24c of fixed scroll 24.
(2-8) discharge pipe
Discharge pipe 20 is the pipe for outside of the compression refrigerant from high-pressure space S1 to shell 10 to be discharged.Discharge pipe 20
It is embedded in the main part housing department 11 of shell 10 airtight shape.Discharge pipe 20 penetrates high-pressure space S1 in the horizontal direction.In outer
The opening portion 20a of discharge pipe 20 in shell 10 is located near supporting member 23.
(3) action of screw compressor
Action to the screw compressor 101 of present embodiment illustrates.First, to possessing screw compressor 101
Refrigerant loop in the flowing of refrigerant that circulates illustrate.Then, to the stream of the lubricating oil inside screw compressor 101
It is dynamic to illustrate.
The flowing of (3-1) refrigerant
First, drive motor 16 is driven, so as to which rotor 52 rotates.Thus, it is fixed in the crank axle 17 of rotor 52
Carry out axle rotation.The axle rotary motion of crank axle 17 is passed to movable scroll 26 through upper end bearing 26c.Crank axle 17
The axle center of upper end is eccentric relative to the axle center of the axle rotary motion of crank axle 17.In addition, prevented by geneva cross 39
The only rotation of movable scroll 26.Thus, movable scroll 26 relative to fixed scroll 24 without certainly then carrying out revolution fortune
It is dynamic.
The refrigerant of low-temp low-pressure before being compressed is provided to compression mechanism from suction line 19 via main inlet hole 24c
15 discharge chambe 40.By the revolution motion of movable scroll 26, from fixed scroll while discharge chambe 40 is gradually reduced volume
The peripheral part of part 24 moves towards central part.As a result, the refrigerant of discharge chambe 40 is compressed and becomes compression refrigerant.Pressure
Contraction cryogen freezes after tap 41 is discharged to silence space 45 via the first compression refrigerant stream 46 and the second compression
Agent stream 48 and be discharged to high-pressure space S1.And then compression refrigerant declines in motor cooling channel 55 and reaches driving horse
Up to the high-pressure space S1 of 16 lower section.And then compression refrigerant make Flow reverse and in another motor cooling channel 55 and driving
The air gap of motor 16 rises.Finally, compression refrigerant is discharged to the outside of screw compressor 101 from discharge pipe 20.
The flowing of (3-2) lubricating oil
First, motor 16 is driven, and so as to which rotor 52 rotates, thus, crank axle 17 carries out axle rotation.Pass through crank axle
17 axle rotation is driven compression mechanism 15, when compression refrigerant is discharged to high-pressure space S1, in high-pressure space S1
Pressure rise.In addition, the upper end of main oil passage 61 connects through grease chamber 83 and fuel feeding pore 63 with low-voltage space S2.Thus,
Pressure difference is produced between the top and bottom of main oil passage 61.As a result, the lubricating oil being accumulated in the 10a of trapped fuel space is by pressure
Difference is sucked from the lower end of main oil passage 61 and risen in main oil passage 61 towards grease chamber 83.
The 3rd secondary oil passage 61c, the second secondary confession are sequentially diverted in the major part for the lubricating oil that main oil passage 61 rises
The secondary oil passage 61a of oil circuit 61b and first.In the lubricating oil that the 3rd secondary oil passage 61c flows to crank axle 17 and lower bearing 60
Sliding surface be lubricated after be provided in high-pressure space S1 and return to trapped fuel space 10a.In the second secondary oil passage 61b flowings
Lubricating oil the sliding surface of crank axle 17 and the upper bearing 32 of supporting member 23 is lubricated after be provided to high-pressure space
S1 and crank chamber S3.The lubricating oil for being provided to high-pressure space S1 returns to trapped fuel space 10a.It is provided to crank chamber S3 lubrication
Oil is provided to high-pressure space S1 via the way to cycle oil 23a of supporting member 23, and returns to trapped fuel space 10a.It is secondary first
The lubricating oil of oil passage 61a flowings is lubricated in the sliding surface to crank axle 17 and the upper end bearing 26c of movable scroll 26
After be provided to crank chamber S3, and return to trapped fuel space 10a via high-pressure space S1.
The lubricating oil for rising to upper end in main oil passage 61 and reaching grease chamber 83 flows by pressure difference in fuel feeding pore 63
And it is provided to oil groove 24e.Thrust sliding surface 24d is sealed and drained to low by the part for being provided to oil groove 24e lubricating oil
Press space S 2 and discharge chambe 40.Now, it was the lubricating oil of HTHP originally to being present in low-voltage space S2 and discharge chambe 40
Refrigerant gas before compression is heated.In addition, the lubricating oil being flowed into discharge chambe 40 is mixed with the state of small oil droplet
Enter into compression refrigerant.Be mixed into lubricating oil in compression refrigerant by with compression refrigerant identical path and from compression
Room 40 is discharged in high-pressure space S1.Then, lubricating oil with compression refrigerant together motor cooling channel 55 decline after
Collided with oil separation plate 73.The lubricating oil for being attached to oil separation plate 73 falls in high-pressure space S1 and reaches trapped fuel space 10a.
(4) feature of screw compressor
The refrigerating plant 100 of present embodiment can suppress because the operating of screw compressor 101 stops and makes compressor
The situation that structure 15 damages.Below, its reason is illustrated.
When the operating of screw compressor 101 stops, the revolution motion of movable scroll 26 stops.In movable scroll 26
The moment of stopping, the refrigerant gas for the high pressure compressed in discharge chambe 40 in the tap 41 of compression mechanism 15 being present,
The refrigerant gas of the low pressure before being directed to discharge chambe 40 in the main inlet hole 24c of compression mechanism 15 be present.Therefore, may be used
Dynamic vortex part 26 due to the pressure differential between tap 41 and main inlet hole 24c carry out to revolution direction during refrigerant compression
The return motion of opposite direction revolution.Due to the return motion of movable scroll 26, discharge chambe 40 (the first discharge chambe 40a and
Second discharge chambe 40b) volume increase.When the volume increase of discharge chambe 40, the refrigerant expansion in discharge chambe 40, therefore press
The pressure of refrigerant in contracting room 40 reduces.On the other hand, due to the return motion of movable scroll 26, the system in discharge chambe 40
A part for cryogen is flowed into main inlet hole 24c, and therefore, the pressure of the refrigerant in main inlet hole 24c rises.
In the present embodiment, fixed scroll 24 first end plate 24a formed with access 24h.Access 24h will
First completely closes discharge chambe 40a and main inlet hole 24c is connected, or completely closes discharge chambe 40b and main suction by second
Enter hole 24c to connect.In addition, being provided with the anti-locking mechanism 25 of adverse current in access 24h, the anti-locking mechanism 25 of the adverse current only allows to make
Cryogen completely closes discharge chambe 40a flowings to first from main inlet hole 24c and refrigerant is complete to second from main inlet hole 24c
Contract fully discharge chambe 40b flows.Therefore, first is made to completely close discharge chambe in the return motion due to movable scroll 26
The pressure of 40a or the second refrigerant for completely closing discharge chambe 40b gets lower than the feelings of the pressure of main inlet hole 24c refrigerant
Under condition, refrigerant completely closes discharge chambe 40a or second towards first and completely closed from main inlet hole 24c through access 24h
Discharge chambe 40b flows.Thus, main inlet hole 24c and first completely closes the pressure differential between discharge chambe 40a or main suction
The pressure differential that hole 24c and second is completely closed between discharge chambe 40b is reduced.
, sometimes can dynamic vortex when making 26 return motion of movable scroll when the operating stopping due to screw compressor 101
The arrival of part 26 formation first completely closes discharge chambe 40a or second and completely closes discharge chambe 40b position.Now, first is complete
Close the pressure of refrigerant and main inlet hole 24c refrigerant that discharge chambe 40a or second completely closes discharge chambe 40b
Pressure puts on the second scrollwork 26b of movable scroll 26 winding end portion 26d.
But completely close discharge chambe 40b due to making first to completely close discharge chambe 40a or second using access 24h
Reduce with main inlet hole 24c pressure differential, therefore, because pressure differential and act on the second scrollwork 26b winding end portion 26d's
The size of power reduces.In 26 return motion of movable scroll, when the second scrollwork 26b winding end portion 26d is by power, the
Two scrollwork 26b collide fixed scroll 24, it is possible to which fixed scroll 24 and movable scroll 26 are damaged.Therefore, by using
Access 24h operates the power for the winding end portion 26d that the second scrollwork 26b is put on during stopping reducing in screw compressor 101,
So as to suppress the damage of fixed scroll 24 and movable scroll 26.Therefore, screw compressor 101 can suppress operating
Damage during stopping caused by inside caused by pressure difference.In addition, by possessing screw compressor 101, so as to which refrigerating plant 100 is transported
Reliability when turning improves.
In addition, when screw compressor 101 generally operates, when being compressed refrigerant using compression mechanism 15, compression
The pressure of refrigerant in room 40 is higher than the pressure of the refrigerant in main inlet hole 24c.But because the anti-locking mechanism 25 of adverse current is prohibited
Only refrigerant flows to main inlet hole 24c from discharge chambe 40, therefore, refrigerant will not from discharge chambe 40 through access 24h direction
Main inlet hole 24c flowings.
<Second embodiment>
The screw compressor of second embodiment of the present invention is illustrated.Due to the basic knot of present embodiment
Structure, action and feature are identical with the screw compressor of first embodiment, therefore, the main pair of difference from first embodiment
Illustrate.
Figure 10 is the sectional view of the compression mechanism 115 of present embodiment.In Fig. 10, have and first embodiment
The key element of the same 26S Proteasome Structure and Function of compression mechanism 15 uses identical reference numeral.Compression mechanism 115 is by fixed scroll 124
Formed with movable scroll 126.Fixed scroll 124 has first end plate 124a and the first scrollwork 124b.Movable scroll 126
With the second end plate 126a and the second scrollwork 126b.In first end plate 124a formed with main inlet hole 124c.In main inlet hole
124c is embedded with suction line 119.Discharge chambe 140 has been internally formed in compression mechanism 115.Basic structure above is real with first
The compression mechanism 15 for applying mode is identical.
In the first embodiment, in fixed scroll 24 formed with main inlet hole 24c and discharge chambe 40 are connected
Access 24h.That is, access 24h is built in compression mechanism 15.But in the present embodiment, as shown in Figure 10,
End plate 124a is formed with the access 124h connected with discharge chambe 140, also, the communicating pipe 124i being connected with access 124h
It is arranged on the outside of compression mechanism 115.In addition, communicating pipe 124i is connected with suction line 119.Due to suction line 119 and main suction
Hole 124c is connected, and therefore, has the access with first embodiment by the path formed access 124h and communicating pipe 124i
24h identical functions.Communicating pipe 124i is configured in the inside of shell 10.But it is also possible to as needed and by communicating pipe 124i
A part configuration in the outside of shell 10.
In addition, access 124h is provided with the anti-locking mechanism 125 of adverse current.Countercurrently anti-locking mechanism 125 allows refrigerant from suction
Enter pipe 119 to flow to discharge chambe 140 and forbid refrigerant to flow from discharge chambe 140 to suction line 119.Countercurrently anti-locking mechanism
125 be, for example, check-valves.That is, the anti-locking mechanism 125 of adverse current has the anti-identical work(of locking mechanism 25 of adverse current with first embodiment
Energy.
In the present embodiment, it is same with first embodiment, make movable whirlpool using access 124h and communicating pipe 124i
Pressure differential caused by the return motion of rotating part 126 between suction line 119 and discharge chambe 140 reduces.Therefore, because the pressure differential
And the size for acting on the power in the second scrollwork 126b winding end portion reduces, therefore, it is possible to suppress fixed scroll 124 and can
The damage of dynamic vortex part 126.Therefore, possessing the screw compressor of compression mechanism 115 can suppress to produce inside when operating stopping
Damage caused by raw pressure difference.
<Variation>
The applicable variation of compressor to being directed to embodiment of the present invention illustrates.
(1) variation A
In the first embodiment, access 24h is connected with the main inlet hole 24c of fixed scroll 24.The quilt of suction line 19
It is embedded in main inlet hole 24c.But it is also possible to further set and the anti-locking mechanism of adverse current in main inlet hole 24c or suction line 19
The 25 same anti-locking mechanisms of adverse current.In addition, in the case of the anti-locking mechanism of adverse current is set in main inlet hole 24c, access 24h with
The mode of space openings between the main inlet hole 24c anti-locking mechanism of adverse current and discharge chambe 40 is formed at fixed scroll 24.
(2) variation B
In this second embodiment, communicating pipe 124i is installed in suction line 119.But as long as communicating pipe 124i is to supply
The space of refrigerant flowing before being compressed by compression mechanism 115, then can also be connected with other spaces.For example, communicating pipe 124i
It can also be connected with the pipe arrangement between the screw compressor and evaporator that possess compression mechanism 115.In Fig. 1, during cooling operation
Evaporator be indoor heat converter 105, evaporator during heating operation is outdoor heat converter 103.
(3) variation C
In this second embodiment, the anti-locking mechanism 125 of adverse current is arranged at access 124h.But the anti-locking mechanism 125 of adverse current
Communicating pipe 124i can also be installed in.
Industrial applicability
The screw compressor of the present invention can suppress the damage caused by pressure difference caused by inside when stopping.
Claims (5)
1. a kind of screw compressor (101), the screw compressor possess：
Compression mechanism (15), it has a fixed scroll (24) and movable scroll (26), above-mentioned movable scroll (26) with it is upper
State fixed scroll engagement and form the discharge chambe (40) that refrigerant is compressed；
Space forming portion (24a) is sucked, it forms the suction space (24c) for importing above-mentioned refrigerant to above-mentioned discharge chambe；With
And
Access forming portion (24a), it forms the access (24h) for connecting above-mentioned discharge chambe and above-mentioned suction space,
Above-mentioned access is provided with the anti-locking mechanism (25) of adverse current, and the above-mentioned anti-locking mechanism of adverse current only allows above-mentioned refrigerant from above-mentioned suction
Enter space to flow to above-mentioned discharge chambe,
Above-mentioned access will be imported into above-mentioned refrigerant and above-mentioned discharge chambe after being just fully closed and above-mentioned suction space connect
Pick up and.
2. screw compressor according to claim 1, wherein,
The above-mentioned anti-locking mechanism of adverse current is check-valves.
3. screw compressor according to claim 1 or 2, wherein,
Above-mentioned suction space forming portion and above-mentioned access forming portion are included in compression mechanism.
4. screw compressor according to claim 1 or 2, wherein,
Above-mentioned suction space forming portion includes the suction line (119) being connected with compression mechanism,
Above-mentioned access forming portion includes the communicating pipe (124i) being connected with above-mentioned suction line.
5. a kind of refrigerating plant (100), it possesses screw compressor described in claim 1 or 2, condenser (103,105), swollen
Swollen mechanism (104) and evaporator (105,103).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-266423 | 2014-12-26 | ||
| JP2014266423A JP6137166B2 (en) | 2014-12-26 | 2014-12-26 | Scroll compressor and refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105736367A CN105736367A (en) | 2016-07-06 |
| CN105736367B true CN105736367B (en) | 2018-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510983192.7A Active CN105736367B (en) | 2014-12-26 | 2015-12-24 | Screw compressor and refrigerating plant |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6137166B2 (en) |
| CN (1) | CN105736367B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7000136B2 (en) * | 2017-11-29 | 2022-01-19 | 三菱重工サーマルシステムズ株式会社 | Scroll compressor |
| JP6874795B2 (en) * | 2019-08-05 | 2021-05-19 | ダイキン工業株式会社 | Scroll compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4560330A (en) * | 1983-10-21 | 1985-12-24 | Hitachi, Ltd. | Scroll device with suction chamber pressure relief |
| US4840545A (en) * | 1988-05-16 | 1989-06-20 | American Standard Inc. | Scroll compressor relief valve |
| CN1099847A (en) * | 1993-09-03 | 1995-03-08 | 三菱重工业株式会社 | Scroll type compressor |
| CN1106505A (en) * | 1993-11-02 | 1995-08-09 | 松下电器产业株式会社 | Vortex compressor |
| CN1158944A (en) * | 1995-12-05 | 1997-09-10 | 松下电器产业株式会社 | Eddy gas compressor with by-pass valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4589196B2 (en) * | 2005-08-12 | 2010-12-01 | サンデン株式会社 | Scroll type fluid machine and refrigeration cycle using the fluid machine |
-
2014
- 2014-12-26 JP JP2014266423A patent/JP6137166B2/en active Active
-
2015
- 2015-12-24 CN CN201510983192.7A patent/CN105736367B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4560330A (en) * | 1983-10-21 | 1985-12-24 | Hitachi, Ltd. | Scroll device with suction chamber pressure relief |
| US4840545A (en) * | 1988-05-16 | 1989-06-20 | American Standard Inc. | Scroll compressor relief valve |
| CN1099847A (en) * | 1993-09-03 | 1995-03-08 | 三菱重工业株式会社 | Scroll type compressor |
| CN1106505A (en) * | 1993-11-02 | 1995-08-09 | 松下电器产业株式会社 | Vortex compressor |
| CN1158944A (en) * | 1995-12-05 | 1997-09-10 | 松下电器产业株式会社 | Eddy gas compressor with by-pass valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105736367A (en) | 2016-07-06 |
| JP6137166B2 (en) | 2017-05-31 |
| JP2016125415A (en) | 2016-07-11 |
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