CN205503462U - Rotary compressor - Google Patents
Rotary compressor Download PDFInfo
- Publication number
- CN205503462U CN205503462U CN201620159444.4U CN201620159444U CN205503462U CN 205503462 U CN205503462 U CN 205503462U CN 201620159444 U CN201620159444 U CN 201620159444U CN 205503462 U CN205503462 U CN 205503462U
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- Prior art keywords
- bent axle
- bearing
- rotary compressor
- ring portion
- oil
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rolling Contact Bearings (AREA)
- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Compressor (AREA)
Abstract
The utility model discloses a rotary compressor possesses: compressing mechanism portion, it is to refrigerant compress, and the bent axle, it is done all can to the transmission rotary driving of above -mentioned compressing mechanism portion, and this rotary compressor still possesses: as slide bearing's base bearing and supplementary bearing, they have inner surface, this inner surface via the above -mentioned bent outside diameter of shaft face of refrigerant oil supporting, and antifriction bearing, it has outer lane portion and an inner circle portion, this outer lane portion is fixed in the setting in above -mentioned slide bearing's inner surface's groove, this inner circle portion by the supporting of above -mentioned slide bearing for rotating, the clearance has between bent outside diameter of shaft face of the aforesaid and above -mentioned antifriction bearing's inner circle portion.
Description
Technical field
The present invention relates to rotary compressor.
Background technology
As existing rotary compressor, such as, propose have the top at sliding bearing that rolling is set
The device (for example, referring to patent documentation 1) of bearing construction.It addition, as existing rotary pressure
Contracting machine, it is also proposed that have the inside diameter at sliding bearing arrange rolling bearing device (for example, referring to
Patent documentation 2～4).
Patent documentation 1: Japanese Unexamined Patent Publication 2008-169827 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2001-323886 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2007-285180 publication
Patent documentation 4: Japanese Unexamined Patent Publication 5-256283 publication
But, in the sliding bearing described in patent documentation 1, in the situation that refrigerator oil is exhausted
Under, there is the problem that the contact portion of bent axle and sliding bearing is likely damaged.It addition, in patent
In rolling bearing described in document 1～4, exist and produce certain because of the friction in rolling bearing
The problem of slippage loss.
Summary of the invention
The present invention is in order to solve above-mentioned problem and to produce, and its object is to offer and is prevented from
The damage of the contact portion of bent axle and bearing, and the rotary compressor of slippage loss can be reduced.
The rotary compressor of the present invention possesses: compression mechanical part, and cold-producing medium is compressed by it；
And bent axle, it is to above-mentioned compression mechanical part transmission rotary driving force, and this rotary compressor also has
Standby: sliding bearing, it has aperture surface, and this aperture surface supports above-mentioned bent axle via refrigerator oil
Outer diameter face；And rolling bearing, it has outer ring portion and inner ring portion, and this outer ring portion is fixed in and sets
Putting the groove of aperture surface at above-mentioned sliding bearing, this inner ring portion is can by above-mentioned sliding supported condition
Rotate, between the outer diameter face and the inner ring portion of above-mentioned rolling bearing of above-mentioned bent axle, there is gap.
Further, the rotary compressor of the present invention is preferably formed into following structure, it may be assumed that via setting
In the hollow hole of above-mentioned bent axle and oil supplying hole in the outer diameter face of above-mentioned bent axle with above-mentioned sliding bearing
Above-mentioned refrigerator oil is supplied between diametric plane and to above-mentioned gap.
Further, the width of the radial direction in the preferred above-mentioned gap of the rotary compressor of the present invention is 10～50
μm。
The rotary compressor of the present invention is between the outer diameter face and the inner ring portion of rolling bearing of bent axle
There is gap, in the case of refrigerator oil exhaustion, the outer diameter face of bent axle with in rolling bearing
During the contact of circle portion, slide integratedly with the inner ring portion of rolling bearing.It addition, formed in gap
In the case of having oil sealing, the inner ring portion of rolling bearing is as the sliding bearing of bent axle and function.
It is thus possible according to the invention to provide be possible to prevent the damage of bent axle and the contact portion of sliding bearing
Wound, and the rotary compressor of slippage loss can be reduced.
Accompanying drawing explanation
Fig. 1 is of the rotary compressor 100 showing schematically embodiments of the present invention 1
The sectional view of example.
Fig. 2 is the compression of the rotary compressor 100 showing schematically embodiments of the present invention 1
The amplification view of mechanism part 50.
Fig. 3 is the bent axle of the rotary compressor 100 showing schematically embodiments of the present invention 1
The top view of the structure of 5.
Fig. 4 is the main shaft of the rotary compressor 100 showing schematically embodiments of the present invention 1
Hold the sectional view of structure of 9 and rolling bearing 19.
Fig. 5 (a), Fig. 5 (b) are the rotary pressures showing schematically embodiments of the present invention 1
The top view of the structure of the rolling bearing 19 of contracting machine 100, Fig. 5 (a) is to show schematically bent axle
The moist axis of rolling having in the case of refrigerator oil 2 between 5 and the inner ring portion 19a of rolling bearing 19
Holding the structure of 19, Fig. 5 (b) shows schematically the inner ring portion 19a of bent axle 5 and rolling bearing 19
Between the structure of rolling bearing 19 in the case of refrigerator oil 2 exhaustion.
Fig. 6 is the effect of the rotary compressor 100 showing schematically embodiments of the present invention 1
Chart.
Description of reference numerals:
1 ... close container；2 ... refrigerator oil；3 ... rotor；4 ... stator；5 ... bent axle；5a ... the
1 eccentric part；5b ... the 2nd eccentric part；5c ... hollow hole；5d ... the 1st oil supplying hole；5e ... the 2nd
Oil supplying hole；5f ... the 3rd oil supplying hole；5g ... the 4th oil supplying hole；6 ... the 1st cylinder；7 ... the 2nd cylinder；8…
Intermediate plate；9 ... base bearing；9a ... groove；10 ... the 1st discharge chambe；11 ... the 1st rotary-piston；
12 ... supplementary bearing；13 ... the 2nd discharge chambe；14 ... the 2nd rotary-piston；15 ... oil eliminator；16…
1st refrigerant piping；17 ... the 2nd refrigerant piping；18 ... discharge pipe；19 ... rolling bearing；
19a ... inner ring portion；19b ... outer ring portion；19c ... rolling element；20 ... gap；30 ... motor；50…
Compression mechanical part；70 ... oil sealing portion；90 ... cavity；100 ... rotary compressor.
Detailed description of the invention
Embodiment 1.
Use Fig. 1～Fig. 3 that the structure of the rotary compressor 100 of embodiments of the present invention 1 is entered
Row explanation.Fig. 1 is the rotary compressor 100 showing schematically embodiments of the present invention 1
The sectional view of one example.Fig. 2 is the rotary pressure showing schematically embodiments of the present invention 1
The amplification view of the compression mechanical part 50 of contracting machine 100.Fig. 3 shows schematically the present invention
The top view of the structure of the bent axle 5 of the rotary compressor 100 of embodiment 1.Additionally, at bag
Including Fig. 1～Fig. 3 in interior following accompanying drawing, the size relationship of each component parts and shape are sometimes
Different from practical situation.It addition, in figures in the following, for same or like parts or
Person's part marks identical reference, or omits mark reference.
In FIG, longitudinal type twin-tub type rotary compressor 100 is shown as an example.
Rotary compressor 100 possesses closing container 1, closes the basket that container 1 is cylinder shape.In envelope
Close container 1 internal upper part and contain motor 30, contain compression mechanical part 50 in bottom.Close and hold
The inside of device 1 is full of by the gaseous refrigerant of the high pressure that be have compressed by compression mechanical part 50,
It is sealed with the refrigerator oil 2 for lubricating compression mechanical part 50 in the bottom closing container 1.
Motor 30 possesses rotor 3 and stator 4, and stator 4 is fixed on the medial surface closing container 1.
Motor 30 makes rotor 3 rotate by being energized to stator 4, and motor 30 such as uses DC brushless
Motor etc..
The central part of the through rotor of bent axle 53 is also fixed on rotor 3.Bent axle 5 has drum
The 1st eccentric part 5a and be configured at the 1st eccentric part 5a lower section drum the 2nd
Eccentric part 5b.2nd eccentric part 5b is configured to inclined with the 1st relative to the central shaft of bent axle 5
Heart portion 5a is opposed with 180 degree.
As shown in Figure 1 and Figure 2, compression mechanical part 50 possesses the 1st cylinder the 6 and the 2nd cylinder 7, and the 1st
Cylinder 6 have can for bent axle 5 the 1st eccentric part 5a rotate columnar hollow space, the 2nd
Cylinder 7 has the columnar hollow space that can rotate for the 2nd eccentric part 5b of bent axle 5.The
The lateral surface of 1 cylinder the 6 and the 2nd cylinder 7 is fixed on the medial surface closing container 1.
Compression mechanical part 50 possesses intermediate plate 8, and intermediate plate 8 is fixed on the 1st cylinder the 6 and the 2nd cylinder 7
Between, separate hollow space and the hollow space of the 2nd cylinder 7 of the 1st cylinder 6.Intermediate plate 8 has
Will be located in the supporting of the rotating part between the 1st eccentric part 5a and the 2nd eccentric part 5b of bent axle 5 is
The aperture surface that can slide.
Compression mechanical part 50 possesses the base bearing 9 as sliding bearing and supplementary bearing 12.Base bearing
9 upper surfaces being fixed on the 1st cylinder 6, and have bent axle 5 is supported the aperture surface for sliding.
Supplementary bearing 12 is fixed on the lower surface of the 2nd cylinder 7, and has and support bent axle 5 for sliding
Aperture surface.
The hollow space of the 1st cylinder 6 impaled by intermediate plate 8 and base bearing 9 constitutes the 1st compression
Room 10.Be configured with the 1st rotary-piston 11 at the 1st discharge chambe 10, the 1st rotary-piston 11 with
The mode that can rotate is installed on the periphery of the 1st eccentric part 5a of bent axle 5.It addition, by centre
The hollow space of the 2nd cylinder 7 that plate 8 and supplementary bearing 12 are impaled constitutes the 2nd discharge chambe 13.?
The hollow space of the 2nd cylinder 7 is configured with rotary-piston 14, and rotary-piston 14 is with the side that can rotate
Formula is installed on the periphery of the 2nd eccentric part 5b of bent axle 5.
As it is shown in figure 1, one end of bent axle 5 extends to close the bottom of container 1, thus enable that
It is enclosed in refrigerator oil 2 fuel feeding of the bottom closing container 1 to compression mechanical part 50.At bent axle
One end of the upper direction closing container 1 of 5 is chimeric has oil eliminator 15, oil eliminator 15 to use
In freezing-inhibiting machine oil 2 to the outside outflow of rotary compressor 100.As it is shown on figure 3, at bent axle
The axle central part of 5 is provided with hollow hole 5c, the hollow hole 5c end closing container 1 from bent axle 5
One end of side, portion axially extends, and is used for picking up refrigerator oil 2.
It addition, as it is shown on figure 3, bent axle 5 be internally provided with the 1st oil supplying hole 5d, the 2nd supply
Oilhole 5e, the 3rd oil supplying hole 5f and the 4th oil supplying hole 5g.
1st oil supplying hole 5d is positioned at the top of the 1st eccentric part 5a of bent axle 5, from hollow hole 5c
Branch also extends to the outer diameter face of bent axle 5.1st oil supplying hole 5d is arranged to be used for base bearing
Refrigerator oil 2 is supplied between aperture surface and the outer diameter face of bent axle 5 of 9.
2nd oil supplying hole 5e is positioned at the inside of the 1st eccentric part 5a of bent axle 5, from hollow hole 5c
Branch also extends to the outer diameter face of the 1st eccentric part 5a.2nd oil supplying hole 5e be arranged to be used for
The inside supply refrigerator oil 2 of the 1st discharge chambe 10.
3rd oil supplying hole 5f is positioned at the inside of the 2nd eccentric part 5b of bent axle 5, from hollow hole 5c
Branch also extends to the outer diameter face of the 2nd eccentric part 5b.3rd oil supplying hole 5f be arranged to be used for
The inside supply refrigerator oil 2 of the 2nd discharge chambe 13.
4th oil supplying hole 5g is positioned at the lower section of the 2nd eccentric part 5b of bent axle 5, from hollow hole 5c
Branch also extends to the outer diameter face of bent axle 5.4th oil supplying hole 5g is arranged to be used for supplementary bearing
Refrigerator oil 2 is supplied between aperture surface and the outer diameter face of bent axle 5 of 12.
As it is shown in figure 1, rotary compressor 100 possesses the 1st refrigerant piping the 16 and the 2nd system
Cryogen pipe arrangement 17.The side of the 1st refrigerant piping 16 through closing container 1 and with the 1st compression
Room 10 connects.1st refrigerant piping 16 makes the low pressure from absorbing silencer (not shown)
Gaseous refrigerant flows into the 1st discharge chambe 10 in the 1st cylinder 6.2nd refrigerant piping 17 is through
Close the side of container 1 and connect with the 2nd discharge chambe 13.2nd refrigerant piping 17 make from
The gaseous refrigerant of the low pressure of absorbing silencer (not shown) flows into the 2nd compression in the 2nd cylinder 7
Room 13.
It addition, rotary compressor 100 possesses discharge pipe 18, discharge pipe 18 will be in rotary pressure
The gaseous refrigerant of the high pressure being full of in the closing container 1 of contracting machine 100 is to the system of refrigeration cycle
Cryogen pipe arrangement (not shown) is discharged.The upper surface of discharge pipe 18 through closing container 1 and with envelope
Close the inside connection of container 1.
As it is shown in figure 1, as the base bearing 9 of sliding bearing of present embodiment 1 and supplementary bearing
12 possess more than one rolling bearing 19.Hereinafter, use Fig. 4, Fig. 5 to rolling bearing 19
Structure be described in detail.
Fig. 4 be the rotary compressor 100 showing schematically present embodiment 1 base bearing 9 with
And the sectional view of the structure of rolling bearing 19.Fig. 5 (a), Fig. 5 (b) are to show schematically this
The top view of the structure of the rolling bearing 19 of the rotary compressor 100 of the embodiment 1 of invention,
Fig. 5 (a) is to moisten between the inner ring portion 19a showing schematically bent axle 5 and rolling bearing 19 to have
The structure of the rolling bearing 19 in the case of refrigerator oil 2, Fig. 5 (b) shows schematically bent axle
Rolling bearing in the case of refrigerator oil 2 exhaustion between 5 and the inner ring portion 19a of rolling bearing 19
The structure of 19.
As shown in Fig. 5 (a), Fig. 5 (b), rolling bearing 19 has outside hollow cylindrical
The mechanical organ seen, it possesses inner ring portion 19a (inside diameter) as driving wheel and outer ring portion
19b (outer diameter part), and possess the multiple rollings being configured between inner ring portion 19a and outer ring portion 19b
Body 19c.Rolling bearing 19 can be ball bearing, it is also possible to for Roller Shaft such as cylinder roller bearings
Hold.
In the rolling bearing 19 of present embodiment 1, the lateral surface of outer ring portion 19b is fixed on and sets
The groove 9a, inner ring portion 19a that put the aperture surface at base bearing 9 are supported as rotating by groove 9a.
That is, the rolling bearing 19 of present embodiment 1 is formed as being fixed on the internal diameter being arranged on base bearing 9
The structure of the groove 9a in face.In the diagram, in the upper end of aperture surface and the lower end of base bearing 9
Portion is provided with stair-stepping groove 9a, is fixed with the lateral surface of outer ring portion 19b at stair-stepping groove 9a,
Thus rolling bearing 19 is fixed in the groove 9a of the aperture surface being arranged on base bearing 9.
Additionally, the allocation position of the rolling bearing 19 of present embodiment 1 is not limited to base bearing 9
The upper end of aperture surface and bottom.The rolling bearing 19 of present embodiment 1 can be fixed
In the appointing of inside diameter being arranged on the most exhausted base bearing 9 of refrigerator oil 2 and supplementary bearing 12
The groove 9a of meaning position.
At the hollow space of inner ring portion 19a of the rolling bearing 19 of present embodiment 1, by bent axle 5
Supporting is for can slide relative to inner ring portion 19a.In present embodiment 1, in bent axle 5 and rolling
Being provided with gap 20 between the inner ring portion 19a of dynamic bearing 19, the width of the radial direction in gap 20 is adjusted
Whole is 10～50 μm.That is, in present embodiment 1, the outer diameter part of bent axle 5 is formed as
Structure, it may be assumed that neither with the inner ring portion 19a of rolling bearing 19, be also not secured to rolling bearing 19
Inner ring portion 19a.
The moist feelings having refrigerator oil 2 between the inner ring portion 19a of bent axle 5 and rolling bearing 19
Under condition, as shown in the oblique line portion of Fig. 5 (a), gap 20 becomes oil sealing portion 70 (oil film),
The outer diameter part of bent axle 5 does not contacts with the inner ring portion 19a of rolling bearing 19.
On the other hand, the refrigerator oil 2 between the inner ring portion 19a of bent axle 5 and rolling bearing 19
In the case of exhaustion, as shown in the part of the blacking of Fig. 5 (b), gap 20 becomes cavity 90,
The outer diameter part of bent axle 5 can contact with the inner ring portion 19a of rolling bearing 19.
Additionally, the load of rolling bearing 19 refrigerant gas that starts function is set to low
Damage is started in the endurance limits of inner ring portion 19a that is the inner ring portion 19a of rolling bearing 19
Load.
It follows that the action to the rotary compressor 100 of present embodiment 1 illustrates.
If supplying driving voltage to the stator 4 of motor 30, then rotor 3 is by from stator 4 institute
The revolving force of rotating excitation field that produces and rotate.If rotor 3 rotates, then it is fixed on rotor 3
Bent axle 5 rotate, thus the 1st eccentric part 5a of bent axle 5 and the 2nd eccentric part 5b is carried out partially
The heart rotates.Interlock with the eccentric rotational motion of the 1st eccentric part 5a, in the 1st discharge chambe 10 the
1 rotary-piston 11 carries out eccentric rotary, thus the volume of the 1st discharge chambe 10 is reduced.With
The eccentric rotational motion of 2 eccentric part 5b interlocks, the 2nd rotary-piston 14 in the 2nd discharge chambe 13
Carry out eccentric rotary, thus the volume of the 2nd discharge chambe 13 is reduced.
The volume-diminished of the 1st discharge chambe 10, is thus inhaled into from the 1st refrigerant piping 16
The gaseous refrigerant of the low pressure in 1 discharge chambe 10 is compressed to the gaseous refrigerant of high pressure, and is arranged
Go out to closing in container 1.The volume-diminished of the 2nd discharge chambe 13, thus joins from the 2nd cold-producing medium
Pipe 17 is inhaled into the gaseous refrigerant of the low pressure in the 2nd discharge chambe 13 and is compressed to the gas of high pressure
State cold-producing medium, and be discharged to close in container 1.The high pressure being discharged in closing container 1
The refrigerant piping that gaseous refrigerant is discharged to refrigeration cycle via discharge pipe 18 (is not schemed
Show).
Additionally, in the rotary compressor 100 of present embodiment 1, the 2nd eccentric part 5b quilt
It is configured to opposed with 180 degree relative to the central shaft of bent axle 5 and the 1st eccentric part 5a.Therefore,
Compression section in 2nd discharge chambe 13 can be wrong relative to the compression section in the 1st discharge chambe 10
Open the anglec of rotation of 180 degree.Therefore, in twin-tub type rotary compressor 100, it is possible to reduce song
The load of axle 5 such that it is able to improve reliability.It addition, the change of the torque of bent axle 5 can be reduced
Dynamic such that it is able to reduce the vibration of direction of rotation.
It addition, be enclosed the refrigerator oil 2 principle according to centrifugal pump of the bottom closing container 1,
By centrifugal force produced by the rotation of bent axle 5, inhaled from the hollow hole 5c being arranged at bent axle 5
Rise.The 1st oil supplying hole 5d～the 4th oil supplying hole is passed through by the refrigerator oil 2 picked up to hollow hole 5c
5g and as lubricating oil (lubriation material) by fuel feeding to compression mechanical part 50.Such as, from the 1st
Oil supplying hole 5d is to supplying refrigerator oil 2 between the aperture surface and the outer diameter face of bent axle 5 of base bearing 9.
Supply refrigerator oil 2 to the inside of the 1st discharge chambe 10 from the 2nd oil supplying hole 5e.From the 3rd fuel feeding
Hole 5f supplies refrigerator oil 2 to the inside of the 2nd discharge chambe 13.From the 4th oil supplying hole 5g to countershaft
Hold supply refrigerator oil 2 between the aperture surface of 12 and the outer diameter face of bent axle 5.
Such as, refrigerator oil 2 via the 2nd oil supplying hole 5e by fuel feeding to the 1st discharge chambe 10
Portion, thus the space part between intermediate plate 8 and bent axle 5 is formed and produces based on refrigerator oil 2
Oil film.By forming oil film, avoid from the 1st discharge chambe the 10 or the 2nd discharge chambe 13
The leakage of cold-producing medium, therefore, it is possible to improve the pressure of the 1st discharge chambe the 10 or the 2nd discharge chambe 13
Contracting performance.It addition, by forming oil film, it is possible to avoid aperture surface and the bent axle 5 of intermediate plate 8
Outer diameter face directly contacts, therefore, it is possible to prevent the damage of compression mechanical part 50.
It addition, refrigerator oil 2 is via the 1st oil supplying hole 5d and the 4th oil supplying hole 5g by fuel feeding extremely
Gap 20 between inner ring portion 19a and the outer diameter face of bent axle 5 of rolling bearing 19, wherein, rolling
Dynamic bearing 19 is configured at the base bearing 9 as sliding bearing and the aperture surface of supplementary bearing 12.Logical
Cross to gap 20 fuel feeding refrigerator oil 2, thus as shown in Fig. 5 (a), form oil in gap 20
Envelope portion 70.By forming oil sealing portion 70, thus bent axle 5 with not with the inner ring portion of rolling bearing 19
The mode of 19a contact is rotated.That is, rolling bearing 19 plays merit as sliding bearing
Energy.
Herein, it is considered to for a long time do not carrying out operating and refrigerator oil 2 is stranded in and closes container 1
Bottom, so refrigerant liquefaction and dissolve in refrigerator oil 2 state under, start rotary compressor
The situation of 100.When rotary compressor 100 starts, the refrigerator oil 2 in gap 20 is withered
The state exhausted, as shown in Fig. 5 (b), forms cavity 90 in gap 20.Formed in gap 20
In the case of having cavity 90, the outer diameter part of bent axle 5 can be with the inner ring portion 19a of rolling bearing 19
Contact.When the outer diameter part of bent axle 5 contacts with the inner ring portion 19a of rolling bearing 19, the axis of rolling
Hold the inner ring portion 19a of 19 to slide integratedly with bent axle 5.That is, exhausted at refrigerator oil 2
State under, the inner ring portion 19a of rolling bearing 19 plays the merit of the script as rolling bearing 19
Energy.
Additionally, by the refrigerator oil 2 in fuel feeding to the 1st discharge chambe the 10 or the 2nd discharge chambe 13
The gaseous refrigerant of a part and the high pressure compressed by the 1st discharge chambe the 10 or the 2nd discharge chambe 13
Agent together, is discharged from the 1st discharge chambe the 10 or the 2nd discharge chambe 13.Flow to discharge pipe 18
The gaseous refrigerant of high pressure and the fluid-mixing of refrigerator oil 2 and the oil being embedded in bent axle 5 top
Separator 15 collides, and utilizes centrifugal force to be separated with refrigerator oil 2 by cold-producing medium, thus fridge
Oil 2 returns to the bottom closing container 1.That is, at the rotary compressor 100 of present embodiment 1
In, the centrifugation structure utilizing oil eliminator 15 to be had carrys out freezing-inhibiting machine oil 2 via row
Go out pipe 18 to discharge to the refrigerant piping (not shown) of refrigeration cycle.
As described above, the rotary compressor 100 of present embodiment 1 is being arranged at conduct
The groove 9a of the base bearing 9 of sliding bearing and the aperture surface of supplementary bearing 12 is fixed with rolling bearing 19
Outer ring portion 19b, and the inner ring portion 19a of rolling bearing 19 is supported as sliding, at quilt
Inner ring portion 19a supports the outer diameter face of the bent axle 5 for sliding and the interior of above-mentioned rolling bearing 19
Between circle portion 19a, there is gap 20.Use the Fig. 6 rotary compressor to present embodiment 1
The effect of 100 illustrates.
Fig. 6 is the effect of the rotary compressor 100 showing schematically embodiments of the present invention 1
Chart.The transverse axis of chart represents the oil mass of the refrigerator oil 2 in gap 20, i.e. oil sealing portion
The thickness of 70.The longitudinal axis of chart represents slippage loss.The region table of reference A in transverse axis
Show the state of refrigerator oil 2 exhaustion, i.e. be formed with the state in cavity 90 in gap 20.Transverse axis
In the moist state of the region representation refrigerator oil 2 of reference B, i.e. in gap 20 shape
Become to have the state in oil sealing portion 70.The border of reference A and reference B is represented with chain-dotted line.
Solid line in Fig. 6 represents the slippage loss in the rotary compressor 100 of present embodiment 1.
Dotted line in the region of reference A of Fig. 6 represents when refrigerator oil 2 exhaustion, existing
The slippage loss in the case of function as sliding bearing of the bearing of some compressors.Fig. 6
Reference B region in doublet represent when refrigerator oil 2 is moist, existing
The slippage loss in the case of function as rolling bearing of the bearing of compressor.
As shown in the chart of the dotted line of Fig. 6, at the state lower bearing of refrigerator oil 2 exhaustion as cunning
Dynamic bearing and in the case of function, owing to rotary shaft directly contacts with bearing, therefore oil film subtracts
Few, slippage loss increases therewith.And, if slippage loss reach on the chart of dotted line × mark
Numerical value, then the problem that there is the contact portion damage of axle and bearing.
It addition, as shown in the chart of the doublet of Fig. 6, the axle when refrigerator oil 2 is moist
Making for rolling bearing in the case of function, rotary shaft contacts all the time with bearing and slides,
Therefore, compared with the situation employing sliding bearing, there is the problem that slippage loss increases.
To this, the rotary compressor 100 of present embodiment 1 is in the outer diameter face of bent axle 5 and rolling
Between the inner ring portion 19a of bearing 19, there is gap 20.
In the case of refrigerator oil 2 exhaustion, it is formed with cavity 90 in gap 20.It is being formed
In the case of cavity 90, the outer diameter part of bent axle 5 can connect with the inner ring portion 19a of rolling bearing 19
Touch.The outer diameter face of bent axle 5 is when contacting with the inner ring portion 19a of rolling bearing 19, with the axis of rolling
Hold the inner ring portion 19a of 19 to slide integratedly.That is, such as the figure of solid line of region A of Fig. 6
Shown in table, bent axle 5 directly contacts with the inner ring portion 19a of rolling bearing 19, thus coefficient of friction
Infinite approach 1, the inner ring portion 19a of rolling bearing 19 plays the script as rolling bearing 19
Function.
On the other hand, in the case of refrigerator oil 2 is moist, it is formed with oil sealing portion in gap 20
70.Owing to being formed with oil sealing portion 70, thus the outer diameter face of bent axle 5 and the inner ring of rolling bearing 19
Coefficient of friction between portion 19a reduces.That is, bent axle 5 with not with the inner ring portion of rolling bearing 19
19a contact mode be rotated, therefore as Fig. 6 region B solid line chart shown in,
Rolling bearing 19 is function as sliding bearing.
As described above, in the rotary compressor 100 of present embodiment 1, according to being formed at
The state in the oil sealing portion 70 in gap 20, it is possible to apply flexibly the function as sliding bearing and as rolling
The advantage of the function of both of the function of the script of dynamic bearing such that it is able to get both components damage
Reduce the minimizing with slippage loss.Therefore, according to present embodiment 1, it is provided that be prevented from
The damage of bent axle 5 and the contact portion as the base bearing 9 of sliding bearing and supplementary bearing 12,
And the rotary compressor 100 of slippage loss can be reduced.
It addition, according to present embodiment 1, endurance when refrigerator oil 2 is exhausted increases substantially,
Can the rotary compressor 100 of life-time service therefore, it is possible to provide such that it is able to reduce to enclose and rotate
The amount of the refrigerator oil 2 of formula compressor 100.Therefore, according to present embodiment 1, it is possible to reduce
From the amount of the refrigerator oil 2 that rotary compressor 100 is discharged together with cold-producing medium.By reduce from
The amount of the refrigerator oil 2 that rotary compressor 100 is discharged, for instance, it is possible to avoid kind of refrigeration cycle
The performance of the heat exchange brought because of refrigerator oil 2 in heat exchanger reduces.
It addition, according to present embodiment 1, enclose rotary compressor 100 owing to reducing
The amount of refrigerator oil 2, it is thus possible, for instance can also save oil eliminator 15 grade by cold-producing medium with
The structure that refrigerator oil 2 separates.Therefore, the structure of present embodiment 1 is for rotary compressor
The miniaturization of 100 and the minimizing of fee of material are the most effective.
Other embodiments.
This utility model is not limited to above-mentioned embodiment, but can carry out various deformation.
Such as, although in above-mentioned embodiment 1, rotary compressor 100 is set to longitudinal type,
But it can also be provided that horizontal arrangement type.
It addition, in above-mentioned embodiment 1, although be formed as twin-tub type rotary compressor 100,
But it is not limited to this.For example, it is possible to be formed as single cylinder type rotary compressor 100, it is also possible to
Be formed as the rotary compressor 100 with the cylinder of more than three.
Claims (3)
1. a rotary compressor, possesses:
Compression mechanical part, cold-producing medium is compressed by it；And
Bent axle, it is to described compression mechanical part transmission rotary driving force,
This rotary compressor is characterised by, is also equipped with:
Sliding bearing, it has aperture surface, and this aperture surface supports above-mentioned bent axle via refrigerator oil
Outer diameter face；And
Rolling bearing, it has outer ring portion and inner ring portion, this outer ring portion be fixed in be arranged on described
The groove of the aperture surface of sliding bearing, this inner ring portion by described sliding supported condition for rotating,
Between the outer diameter face and the inner ring portion of described rolling bearing of described bent axle, there is gap.
Rotary compressor the most according to claim 1, it is characterised in that
It is formed as structure, it may be assumed that via being arranged at the hollow hole of described bent axle and oil supplying hole to described
Between outer diameter face and the aperture surface of described sliding bearing of bent axle and to described gap supply described cold
Freeze machine oil.
Rotary compressor the most according to claim 1 and 2, it is characterised in that
The width of the radial direction in described gap is 10～50 μm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/056121 WO2016139735A1 (en) | 2015-03-02 | 2015-03-02 | Rotary compressor |
| JPPCT/JP2015/056121 | 2015-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205503462U true CN205503462U (en) | 2016-08-24 |
Family
ID=56727022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620159444.4U Expired - Fee Related CN205503462U (en) | 2015-03-02 | 2016-03-02 | Rotary compressor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6429987B2 (en) |
| CN (1) | CN205503462U (en) |
| WO (1) | WO2016139735A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4184078A4 (en) * | 2020-07-15 | 2024-07-17 | Daikin Ind Ltd | Use as refrigerant for compressor, compressor, and refrigeration cycle device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6211355Y2 (en) * | 1981-04-24 | 1987-03-17 | ||
| JP2656597B2 (en) * | 1989-01-27 | 1997-09-24 | 株式会社日立製作所 | Rotary compressor |
| JPH055491A (en) * | 1991-06-28 | 1993-01-14 | Matsushita Refrig Co Ltd | Liquid coolant conveyer |
| JP2000145675A (en) * | 1998-11-06 | 2000-05-26 | Mitsubishi Electric Corp | Two stage screw compressor |
| JP4120733B2 (en) * | 1999-03-10 | 2008-07-16 | 三菱電機株式会社 | Two stage screw compressor |
| JP2002257057A (en) * | 2001-02-28 | 2002-09-11 | Tokico Ltd | Scroll type fluid machine |
| JP4345682B2 (en) * | 2005-02-14 | 2009-10-14 | 株式会社日立製作所 | Portable vacuum pump and automatic urination treatment apparatus using the same |
| JP6056149B2 (en) * | 2011-08-31 | 2017-01-11 | 株式会社ジェイテクト | Electric pump unit and manufacturing method thereof |
| JP5998522B2 (en) * | 2012-02-29 | 2016-09-28 | 株式会社富士通ゼネラル | Rotary compressor |
-
2015
- 2015-03-02 JP JP2017503238A patent/JP6429987B2/en not_active Expired - Fee Related
- 2015-03-02 WO PCT/JP2015/056121 patent/WO2016139735A1/en active Application Filing
-
2016
- 2016-03-02 CN CN201620159444.4U patent/CN205503462U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016139735A1 (en) | 2016-09-09 |
| JP6429987B2 (en) | 2018-11-28 |
| JPWO2016139735A1 (en) | 2017-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20180302 |
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| CF01 | Termination of patent right due to non-payment of annual fee |