CN105697557A - Scroll compressor, and mounting structure of sliding bearing - Google Patents
Scroll compressor, and mounting structure of sliding bearing Download PDFInfo
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- CN105697557A CN105697557A CN201410686831.9A CN201410686831A CN105697557A CN 105697557 A CN105697557 A CN 105697557A CN 201410686831 A CN201410686831 A CN 201410686831A CN 105697557 A CN105697557 A CN 105697557A
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- sliding bearing
- bearing
- mounting structure
- axle
- inner ring
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- Rotary Pumps (AREA)
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Abstract
The invention aims to provide a scroll compressor, and a mounting structure of a sliding bearing inside the scroll compressor. The mounting structure can lower the possibility of damage of the bearing. The mounting structure of the sliding bearing comprises the sliding bearing installed in a bearing hole and a shaft inserted into the hole of the sliding bearing and is characterized in that the sliding bearing and the bearing hole are in clearance fit, and the sliding bearing and shaft are also in clearance fit.
Description
Technical field
The present invention relates to the mounting structure of the sliding bearing of compressor and inside thereof。
Background technology
Publication number is CN102667191A, and name is called that the Chinese patent literature of " sliding bearing and slide bearing assembly " discloses a kind of sliding bearing improving lubrication property。As it is shown in figure 9, the inner peripheral surface 110 of sliding bearing has the groove 120 of storage lubricating oil, outer peripheral face 150 also forms groove 160。The inventor of this patent documentation thinks makes Intermittent Contact between axle journal and bearing by the operating frequency according to machine, often contacts the lubricating oil that once can will be stored in groove and supplies to axle journal；When groove area accounts for the 15-60% of side face area, slidingsurface just can be made to form complete oil film, thus improving lubrication property。
As shown in Figure 10, the bearing of prior art is generally by fixing with side's interference fit of axle or hole, being previously mentioned " sliding bearing 100 forces press-in to be fixedly attached to axle sleeve 300 with the size possessing certain clamping amount " in above-mentioned patent documentation description [0056th], namely the fixing of the bearing of this patent documentation is to adopt interference fit between axle sleeve hole to realize。
Summary of the invention
It is an object of the invention to provide the mounting structure of the sliding bearing of a kind of screw compressor and inside thereof, it can reduce the probability of bearing damage。
For realizing the mounting structure of the sliding bearing of described purpose, including the sliding bearing being arranged in dead eye and the axle in being inserted in the hole of sliding bearing, it is characterized in, between sliding bearing and dead eye and between sliding bearing and axle, is matched in clearance。
Described mounting structure, its further feature is, the inner peripheral surface of sliding bearing has at least one groove axially penetrated through。
Described mounting structure, its further feature is, is formed with cannelure in two end faces of bearing, and the cannelure of both ends of the surface is through by axially extended hole。
Described mounting structure, its further feature is, the inner or outer side face of bearing has tapering。
Described mounting structure, its further feature is, arranges at dead eye and arranges the shaft shoulder on the interior shaft shoulder and/or axle, so as to moving axially of restriction bearing。
For realizing the mounting structure of the sliding bearing of described purpose, including the sliding bearing being arranged in dead eye and the axle in being inserted in the hole of sliding bearing, it is characterized in, sliding bearing includes inner ring and outer ring, matched in clearance between inner ring and outer ring, matched in clearance between outer ring and dead eye, matched in clearance between inner ring and axle。
Described mounting structure, its further feature is to be formed with the groove axially penetrated through on the contact surface of inner ring and outer ring。
Described mounting structure, its further feature is that the inner surface of inner ring is coated with the coating playing lubrication。
Described mounting structure, its further feature is, described groove forms the inner surface of the outer surface at inner ring or outer ring。
For realizing the screw compressor of described purpose, including the motion of compressor casing and Qi Nei, motion comprises bent axle, eccentric, movable orbiting scroll；The movable orbiting scroll back side forms back pressure cavity；It is characterized between eccentric and movable orbiting scroll or between bent axle and cylinder body, described sliding bearing mounting structure is set, can utilize lubricating oil in back pressure cavity that sliding bearing is lubricated。
Sliding bearing relative to rolling bearing, with lightweight, thickness is little of feature。Produce sliding friction between sliding bearing and axle joined together or hole, therefore wear-resisting and greasy property are required higher。It addition, found by the test of inventor, the bearing that rigidity is excessive, in the course of the work, easily and collide between axle, hole, in turn result in damage and noise。Therefore, the present invention all leaves the bearing mounting structure in gap by setting and hole, axle, makes to allow between these counterparts to produce small diametrically displacement or deformation, to reduce the rigidity of total；Allow relatively rotating between hole and bearing, bearing and axle simultaneously, thus reduce often group and be slidably matched the gear ratio of pair；Bearing arranges groove, when groove maintains lubricating oil, makes relative displacement or rotation between sliding pair more smooth and easy on the one hand, reduce the gear ratio between part and driven load, at sliding pair Surface Creation oil film and buoyancy, impact severity can be reduced on the other hand；By through for groove bearing two ends, continual lubrication oil circulation can be formed。Therefore, the present invention has the advantage promoting lubrication, reducing bearing damage and noise。
Accompanying drawing explanation
The above and other features of the present invention, character and advantage will be become readily apparent from by the description below in conjunction with drawings and Examples, wherein:
Fig. 1 is the sectional view of the mounting structure of sliding bearing in the embodiment of the present invention 1。
Fig. 2 is the sectional view of line A-A along Fig. 1。
Fig. 3 is the sectional view of a variation of embodiment illustrated in fig. 1。
Fig. 4 is the sectional view of the mounting structure of sliding bearing in the embodiment of the present invention 2。
Fig. 5 is the sectional view of the mounting structure of sliding bearing in the embodiment of the present invention 3。
Fig. 6 A is the schematic diagram of a duty of embodiment illustrated in fig. 5。
Fig. 6 B is the sectional view of a variation of embodiment illustrated in fig. 5。
Fig. 7 is the sectional view of a variation of sliding bearing in embodiment illustrated in fig. 5。
Fig. 8 is the sectional view of the embodiment of the present invention 4 mesoscale eddies compressor。
Fig. 9 is the axonometric chart of the sliding bearing recorded in patent documentation CN102667191A。
Figure 10 is the sectional view of the mounting structure of sliding bearing in Fig. 9。
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the invention will be further described; elaborate more details in the following description so that fully understanding the present invention; but the present invention obviously can implement with the multiple alternate manner being different from this description; those skilled in the art can do similar popularization, deduction according to practical situations when without prejudice to intension of the present invention, therefore should with content constraints protection scope of the present invention of this specific embodiment。
It should be noted that these and other accompanying drawing follow-up are all only used as example, it is not what to draw according to the condition of equal proportion, and should not be construed as limiting in this, as to the protection domain of actual requirement of the present invention。
Embodiment 1
As it is shown in figure 1, matched in clearance between sliding bearing 40 periphery and dead eye 11, matched in clearance between inner circumferential and axle 10。The interior shaft shoulder 13 is set at dead eye, or the shaft shoulder 12 is set on axle, the axial movement of bearing during work, can be limited；The interior shaft shoulder 13 and the shaft shoulder 12 also can be arranged simultaneously, but both axial spacings have to be larger than the width of bearing, it is prevented that blocked by bearing。
As shown in Figure 2 (the A-A part sectioned view of Fig. 1), the rotating speed of axle 10 is 800 revs/min, and hole 11 is when being static, due to bearing 40 and hole 11, all there is clearance G 1 in axle 10, G2, allow there is relative sliding, surface quality inside and outside bearing 40 is identical, with shaft diameter for 19.98mm, bearing bore diameter is 20mm, external diameter is 30mm, aperture is 30.02mm is example, it is directly proportional to speed discrepancy according to frictional force, and Proportional coefficient K is equal, calculate the frictional force respectively F1=K* (800-ω) obtaining bearing 40 inner circle and cylindrical, F2=K* (ω-0)=K* ω, moment of friction respectively M1=K* (800-ω) the * R1=K* (800-ω) * 10 produced, M2=K* (ω-0) * R2=K* ω * 30/2, balance according to bearing 40 inside and outside circle moment of friction, equation K* (800-ω) * 10=K* ω * 30/2 can be balanced, so bearing rotational speed omega=10*800/ (10+15)=320 rev/min。Therefore, the speed discrepancy of bearing 40 and main shaft 10 is 800-320=480 rev/min, and the speed discrepancy in bearing 40 and hole 11 is 320 revs/min, defines Multi-stage transmission, and every one-level is much smaller than existing speed discrepancy 800 revs/min。
As shown in Figure 3, in order to make bearing 40 produce floating effect between hole 11 and axle 10, some axially extended grooves 43 can be formed at bearing 40 side face, during axle 10 high-speed rotation, in the cavity at its place, oil is gentle is subject to vigorous agitation, forming the mist of oil being distributed in cavity, the mist of oil in motion is partly in groove 43。
Embodiment 2
The present embodiment continues to use element numbers and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate element, and optionally eliminates the explanation of constructed content。Explanation about clipped can refer to previous embodiment, and it is no longer repeated for the present embodiment。
As shown in Figure 4, sliding bearing includes the inner ring 41, the outer ring 42 that radially arrange from the inside to the outside, inner ring 41 and outer ring 42 and is generally made up of copper or Steel material, inner ring 41 is set on axle 10, outer ring 42 is contained in hole 11, matched in clearance between outer ring 42 and hole 11, matched in clearance between inner ring 41 and axle 10。During assembling, first press-fiting in hand-hole 11 by outer ring 42, be set on axle 10 by inner ring 41, and positioned inner ring 41 by the shaft shoulder 12 on axle 10, be enclosed within hole 11 and be contained on outer ring 42, outer ring 42 is positioned by the interior shaft shoulder 13 in hole 11, forms bearing and hole 11, the coordinating of axle 10。
The periphery of inner ring 41 is provided with some axially extended grooves 3, and when inner ring 41 assembles mutually with outer ring 42, groove 3 constitutes the passage of through bearing both ends of the surface。During axle 10 high-speed rotation, in the cavity at its place, oil is gentle is subject to vigorous agitation, forms the mist of oil being distributed in cavity, and the mist of oil in motion is partly in groove 3。Owing to outer ring 42 is fixed with hole 11, remaining stationary, inner ring 41 is matched in clearance with axle 10 and outer ring 42, and inner ring 41 is subject to the driving from axle 10, and the resistance from outer ring 42, therefore there is speed discrepancy, namely relatively rotate, after oil enters groove 3, it is transferred to rapidly the contact surface of whole inside and outside circle 41,42, form oil film, also form the buoyancy between inside and outside circle 41,42 simultaneously, reduce impact severity。During axle 10 moves, forming vortex in cavity, therefore oil can enter groove 3 constantly from bearing one end, discharges from the other end。
Owing to still suffering from relatively rotating between inner ring 41 and main shaft 10, in order to reduce frictional force further, it is coated with the coatings 100 such as Teflon, molybdenum bisuphide, graphite in inner peripheral surface。
In like manner, it is possible to the inner circumferential in outer ring 42 arranges axially extended groove, identical with the effect that inner ring 41 sets groove 3。
Embodiment 3
The present embodiment continues to use element numbers and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate element, and optionally eliminates the explanation of constructed content。Explanation about clipped can refer to previous embodiment, and it is no longer repeated for the present embodiment。
Embodiment 3 is on the basis of embodiment 1, as it is shown in figure 5, two end faces at bearing 40 arrange cannelure 5, also sets up the axially extending slot 3 ' at bearing 40 two ends that be connected, through with cannelure 5。
Cannelure 5 can play the effect being directed in axially extending slot 3 ' by the oil in cavity, increases the oil mass in groove 3 '。
Bearing 40 is when by side force, for instance when main shaft 10 produces small skew, arranges cannelure 5 and allows bearing 40 to produce local micro-strain。As shown in Figure 6A, when bearing 40 and main shaft 10 relative tilt, cannelure 5 allows bearing 40 to produce local micro-strain, to adapt to the situation of this relative tilt, to increase the contact area of bearing and main shaft, reduces the concentration of load。The machinery that side force takes place frequently is applied this bearing, it is possible to extend the life-span of bearing 40。
As shown in Fig. 6 B and Fig. 7, it is also possible to the periphery wall of bearing 40 or internal perisporium are arranged to band tapered, when the both sides end face of bearing 40 exists pressure reduction, it is simple to main shaft 10 leads when assembling。
Embodiment 4
As shown in Figure 8, screw compressor is driven by drive motor 19。Shell 20 crosses motor cavity 38 and holds motor 19, motor 19 drive mechanism driven comprises bent axle 16, eccentric 17。Compression mechanism comprises movable orbiting scroll 18 and fixed scroll 19, and it engages each other thus crossing multiple compression chamber 27。Crank 32 is stretched out in the position of the intermediate ends deviation crankshaft center of bent axle 16, and crank 32 inserts in the hole 33 of eccentric 17。The lining 35 at bearing 40, movable orbiting scroll 18 back side is installed outside eccentric 17 successively。Shell 20 is provided with air entry and air vent, refrigerant gas in air conditioner loop is sucked into suction muffler 28 by air entry, the middle part mounting bracket 21 of shell 20, bent axle 16 is subject to the bearing 26 of support mesopore and bearing 31 support rotating of shell 20 mesopore, and crank 32 drives movable orbiting scroll 18 to make eccentric motion。Axial passage 37 it is provided with, by through to back pressure cavity 36 and motor cavity 38 in bent axle 32。The outermost layer of movable orbiting scroll 18 is suction muffler 28, from the outside cold-producing medium sucking low pressure of compressor。When movable orbiting scroll 18 rotates, between movable orbiting scroll 18 and fixed scroll 19, form the compression chamber of closing, and compression chamber inner layer gradually moves, reduces, thus compressing cold-producing medium, cold-producing medium discharges high-pressure refrigerant from fixed scroll centre bore 29, drains into discharge chamber 30, is discharged to air conditioner loop again through air vent。
Each bearing of above-mentioned screw compressor is suitable for adopting the sliding bearing of any embodiment of the present invention。As just arranged the sliding bearing 40 described in embodiment 1 between eccentric 17 and lining 35, it can also be the sliding bearing described in embodiment 2 or 3。Lubricating oil is able to flow out from back pressure cavity 36 through this sliding bearing, improves sufficient lubrication bearing。Float sliding bearing 40 inner circle and eccentric 17 between and cylindrical and the endoporus of corresponding hole and lining 35 between be all matched in clearance, reduce the noise because friction causes, about reduce 1dB to 3dB, also extend the life-span of relocatable sliding bearing simultaneously, decrease bearing size, reduce compressor weight。
Although the present invention is with preferred embodiment openly as above, but it is not for limiting the present invention, and any those skilled in the art without departing from the spirit and scope of the present invention, can make possible variation and amendment。Therefore, every content without departing from technical solution of the present invention, according to any amendment, equivalent variations and modification that above example is made by the technical spirit of the present invention, each fall within the protection domain that the claims in the present invention define。
Claims (10)
1. the mounting structure of sliding bearing, including the sliding bearing being arranged in dead eye and the axle in being inserted in the hole of sliding bearing, it is characterised in that be matched in clearance between sliding bearing and dead eye and between sliding bearing and axle。
2. mounting structure as claimed in claim 1, it is characterised in that the inner peripheral surface of sliding bearing has at least one groove axially penetrated through。
3. mounting structure as claimed in claim 1, it is characterised in that being formed with cannelure in two end faces of bearing, the cannelure of both ends of the surface is through by axially extended hole。
4. mounting structure as claimed in claim 3, it is characterised in that the inner or outer side face of bearing has tapering。
5. mounting structure as claimed in claim 1, it is characterised in that arrange at dead eye and on the interior shaft shoulder and/or axle, the shaft shoulder is set, so as to moving axially of restriction bearing。
6. the mounting structure of sliding bearing, including the sliding bearing being arranged in dead eye and the axle in being inserted in the hole of sliding bearing, it is characterised in that, sliding bearing includes inner ring and outer ring, matched in clearance between inner ring and outer ring, matched in clearance between outer ring and dead eye, matched in clearance between inner ring and axle。
7. mounting structure as claimed in claim 6, it is characterised in that be formed with the groove axially penetrated through on the contact surface of inner ring and outer ring。
8. mounting structure as claimed in claim 6, it is characterised in that the inner surface of inner ring is coated with the coating playing lubrication。
9. mounting structure as claimed in claim 7, it is characterised in that described groove forms the inner surface of the outer surface at inner ring or outer ring。
10. screw compressor, including the motion of compressor casing and Qi Nei, motion comprises bent axle, eccentric, movable orbiting scroll；The movable orbiting scroll back side forms back pressure cavity；It is characterized in that between eccentric and movable orbiting scroll or between bent axle and cylinder body, the sliding bearing mounting structure according to any one of claim 1-9 is set, can utilize lubricating oil in back pressure cavity that sliding bearing is lubricated。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410686831.9A CN105697557A (en) | 2014-11-25 | 2014-11-25 | Scroll compressor, and mounting structure of sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410686831.9A CN105697557A (en) | 2014-11-25 | 2014-11-25 | Scroll compressor, and mounting structure of sliding bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105697557A true CN105697557A (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410686831.9A Pending CN105697557A (en) | 2014-11-25 | 2014-11-25 | Scroll compressor, and mounting structure of sliding bearing |
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| Country | Link |
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| CN (1) | CN105697557A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854226A (en) * | 1981-09-25 | 1983-03-31 | Mitsubishi Electric Corp | Liquid pump |
| CN2252901Y (en) * | 1995-11-27 | 1997-04-23 | 西安交通大学 | Whirl compressor with medium pressure inside on its casing |
| CN2702117Y (en) * | 2004-04-01 | 2005-05-25 | 刘立想 | Double layer floating bearing |
| CN201661606U (en) * | 2010-04-13 | 2010-12-01 | 上海申科滑动轴承有限公司 | Novel radial tilting-pad sliding bearing oil-feeding structure |
| CN102116298A (en) * | 2009-12-30 | 2011-07-06 | 上海三电贝洱汽车空调有限公司 | Lubrication mechanism of vortex compressor |
| JP2011252543A (en) * | 2010-06-02 | 2011-12-15 | Jtekt Corp | Rolling bearing |
| CN202811847U (en) * | 2012-09-28 | 2013-03-20 | 重庆江增船舶重工有限公司 | Radial hydrodynamic sliding bearing |
| US20130209014A1 (en) * | 2008-12-26 | 2013-08-15 | Daido Metal Company Ltd. | Split-type sliding bearing for crankshaft in internal combustion engine and split-type sliding bearing device |
| JP2014062585A (en) * | 2012-09-20 | 2014-04-10 | Ntn Corp | Sliding bearing for food machine |
-
2014
- 2014-11-25 CN CN201410686831.9A patent/CN105697557A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854226A (en) * | 1981-09-25 | 1983-03-31 | Mitsubishi Electric Corp | Liquid pump |
| CN2252901Y (en) * | 1995-11-27 | 1997-04-23 | 西安交通大学 | Whirl compressor with medium pressure inside on its casing |
| CN2702117Y (en) * | 2004-04-01 | 2005-05-25 | 刘立想 | Double layer floating bearing |
| US20130209014A1 (en) * | 2008-12-26 | 2013-08-15 | Daido Metal Company Ltd. | Split-type sliding bearing for crankshaft in internal combustion engine and split-type sliding bearing device |
| CN102116298A (en) * | 2009-12-30 | 2011-07-06 | 上海三电贝洱汽车空调有限公司 | Lubrication mechanism of vortex compressor |
| CN201661606U (en) * | 2010-04-13 | 2010-12-01 | 上海申科滑动轴承有限公司 | Novel radial tilting-pad sliding bearing oil-feeding structure |
| JP2011252543A (en) * | 2010-06-02 | 2011-12-15 | Jtekt Corp | Rolling bearing |
| JP2014062585A (en) * | 2012-09-20 | 2014-04-10 | Ntn Corp | Sliding bearing for food machine |
| CN202811847U (en) * | 2012-09-28 | 2013-03-20 | 重庆江增船舶重工有限公司 | Radial hydrodynamic sliding bearing |
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Application publication date: 20160622 |