CN107630816B - A kind of oil-free air compressor sealing structure - Google Patents
A kind of oil-free air compressor sealing structure Download PDFInfo
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- CN107630816B CN107630816B CN201711083831.XA CN201711083831A CN107630816B CN 107630816 B CN107630816 B CN 107630816B CN 201711083831 A CN201711083831 A CN 201711083831A CN 107630816 B CN107630816 B CN 107630816B
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Abstract
The present invention provides a kind of oil-free air compressor sealing structure applied to automobile air compressor parts technical field, rotary shaft (3) one end of the oil-free air compressor sealing structure extends in gear-box (1), rotary shaft (3) other end extends in pneumatics case (2), mounting hole (5) are set on link block (4), rotary shaft (3) is movably arranged in mounting hole (5), oil sealing (8) are set between rotary shaft (3) and mounting hole (5), bushing (9) are also set up between rotary shaft (3) and mounting hole (5), drain path (10) one end being arranged on link block (4) extends to re-entrant portion (11), drain path (10) other end is communicated with the atmosphere, oil-free air compressor sealing structure of the invention, structure is simple, it is at low cost, it can prevent the lubrication in gear-box Oil leaks to pneumatics case, improves compressed air quality, maintains the compressed air pressure in pneumatics case.
Description
Technical field
The invention belongs to automobile air compressor parts technical fields, are to be related to a kind of oil-free air more specifically
Compressor seal structure.
Background technique
In air compressor, the power that a pair of of synchromesh gear in compressor gear-box is used to transmit input shaft is distributed
To driving shaft, driven shaft.Under bearing bearing, driving shaft, driven shaft drive power rotor, driven rotor in pneumatics case to revolve
Turn, bulk gas is compressed and conveys outward.In the process of running, the bearing in gear-box and synchromesh gear need lubricating oil into
Row lubrication and cooling.The complete oil-free air compressor system of compressed air is required for being applied to fuel cell, medicine etc., is
It prevents the oil leak in gear-box to pneumatics case, needs that sealing structure is arranged between pneumatics case and gear-box.In general,
Oil sealing can be set between pneumatics case and gear-box.Oil sealing inner ring card with toughness on the rotary shaft, oil sealing inner ring and rotation
Oil film between axis can prevent oil sealing from damaging rapidly because of friction.However it still suffers from parts of lubricating oil and passes through oil sealing and rotation
Clearance leakage between axis is to pneumatics case.If second oil sealing is arranged, if between the inner ring and rotary shaft of second oil sealing not
Oil film can be set up rapidly, then the oil sealing can damage rapidly because of the friction of rotary shaft.
Summary of the invention
The technical problems to be solved by the present invention are: providing, a kind of structure is simple, and manufacturing cost is low, can effectively prevent tooth
Oil leak in roller box guarantees that compressed air is completely oil-free to pneumatics case, and is able to maintain that air pressure in pneumatics case,
Improve the oil-free air compressor sealing structure of air compressor overall performance.
Solve the problems, such as techniques discussed above, the technical scheme adopted by the invention is as follows:
The present invention is a kind of oil-free air compressor sealing structure, and the oil-free air compressor sealing structure includes sky
Air compressor shell, the air compressor casing body is interior to be arranged gear-box, pneumatics case, and rotary shaft one end extends to gear-box
Interior, the rotary shaft other end extends in pneumatics case, link block is also set up in air compressor casing body, the link block is for dividing
Every mounting hole is arranged on gear-box and pneumatics case, link block, rotary shaft is movably arranged in mounting hole, is extended in gear-box
Synchromesh gear is set in rotary shaft, rotor is set in the rotary shaft extended in pneumatics case, is arranged between rotary shaft and mounting hole
Oil sealing also sets up bushing between rotary shaft and mounting hole, drain path, described drain path one end are arranged on the link block
The re-entrant portion between oil sealing and bushing is extended to, the drain path other end is communicated with the atmosphere.
Oil sealing between the rotary shaft and mounting hole is positioned close to gear-box side, between rotary shaft and mounting hole
Bushing be positioned close to pneumatics case side, multiple tracks recessed pockets are set in the rotary shaft, and per pass recessed pockets are respectively set to
Along the structure of rotary shaft one week arrangement, bushing is ring structure, and multiple tracks protrusion bar is arranged in bushing inner wall, and per pass protrusion bar is set as
Along the structure of bushing inner wall one week arrangement, the diameter dimension of the bushing inner ring of the bushing is set greater than rotation shaft section
The structure of diameter dimension.
The section that multiple tracks recessed pockets in the rotary shaft stated are set as axial direction is serrated structure, on bushing inner wall
The section that multiple tracks protrusion bar is set as axial direction is serrated structure.
The bushing is set as using structure made of high temperature resistant, corrosion-resistant, creep resisting thermoplastic material.
The rotary shaft of the oil-free air compressor sealing structure, link block are all made of that thermal expansion coefficient is low and thermal change
Shape does not influence structure made of the material in gap between bushing and rotary shaft.
It is arranged on the connecting hole inner wall of the link block along one week boss portion of connecting hole inner wall, oil sealing is configured to
The structure being resisted against in boss portion, is arranged bearing installation base in rotary shaft, and bearing is configured to be resisted against bearing installation convex
Structure on platform.
Using technical solution of the present invention, can obtain it is below the utility model has the advantages that
Oil sealing is being arranged close to gearbox position, to realize pneumatics in oil-free air compressor sealing structure of the invention
First of sealing between case and gear-box, and bushing is being set close to pneumatics case position, it realizes between pneumatics case and gear-box
Second sealing, in order to prevent the micro lubricating oil by oil sealing using bushing enter pneumatics case influence compressed air matter
Amount, is arranged drain path on link block, and drain path is communicated with the atmosphere, in this way, in this way, serving as a contrast in air compressor operation
The compressed air that the gap fluctuated between set and rotary shaft can both limit in pneumatics case penetrates bushing and passes through drain path
Air compressor is leaked out, bushing is penetrated after capable of also preventing the oil leak leaked out at oil sealing and enters pneumatics case.This
Outside, the air pressure in drain path communicated with atmosphere is less than the air pressure in pneumatics case, which can effectively prevent to pass through oil
The lubricating oil of envelope is leaked using bushing into pneumatics case, and utilizes the draught head, the micro profit that will be leaked out from oil sealing
Air compressor is discharged by drain path in lubricating oil (having had changed into lubrication oil vapour), into atmosphere.In this way, at by multiple tracks
Reason means can also be handled even if there is micro lubricating oil to permeate oil sealing by drain path, without have an opportunity to permeate bushing again and into
Enter pneumatics case, improves air compressor quality.In such manner, it is possible to ensure always compressed air in pneumatics case in no oil condition,
Compressed air quality is improved, fuel cell, medicine and other fields requirement are met.Oil-free air compressor sealing structure of the invention,
Structure is simple, and manufacturing cost is low, oil leak in gear-box can be effectively prevent to pneumatics case, and be able to maintain that pneumatics case
Interior compressed air pressure meets the completely oil-free requirement of compressed air, improves air compressor quality.
Detailed description of the invention
Brief description is made to content expressed by each attached drawing of this specification and the label in figure below:
Fig. 1 is the partial structural diagram of oil-free air compressor sealing structure of the present invention；
Fig. 2 is the partial enlargement diagram of the sealing position of oil-free air compressor sealing structure described in Fig. 1；
It is attached in the figure, it is marked as 1, gear-box；2, pneumatics case；3, rotary shaft；4, link block；5, mounting hole；6, synchromesh gear；
7, rotor；8, oil sealing；9, bushing；10, drain path；11, re-entrant portion；12, recessed pockets；13, protrusion bar；14, bearing；15,
Boss portion；16, bearing installation base.
Specific embodiment
Below against attached drawing, by the description of the embodiment, to for example related each structure of a specific embodiment of the invention
The works such as the shape of part, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle are further
Detailed description:
As shown in attached drawing 1, attached drawing 2, the present invention is a kind of oil-free air compressor sealing structure, the oil-free air pressure
The secret seal structure that contracts includes air compressor shell, and gear-box 1, pneumatics case 2, rotation are arranged in the air compressor casing body
3 one end of axis extends in gear-box 1, and 3 other end of rotary shaft extends in pneumatics case 2, the company of also setting up in air compressor casing body
Block 4 is connect, mounting hole 5,3 activity of rotary shaft is arranged for separating gear-box 1 and pneumatics case 2 in the link block 4 on link block 4
It is mounted in mounting hole 5, extends to setting synchromesh gear 6 in the rotary shaft 3 in gear-box 1, extend to the rotation in pneumatics case 2
Rotor 7 is set on axis 3, oil sealing 8 is set between rotary shaft 3 and mounting hole 5, bushing 9 is also set up between rotary shaft 3 and mounting hole 5,
Drain path 10 is set on the link block 4, and described 10 one end of drain path extends to the cavity between oil sealing 8 and bushing 9
Position 11,10 other end of drain path are communicated with the atmosphere.Oil sealing 8 is being arranged close to 1 position of gear-box, thus real in above structure
First of sealing between existing pneumatics case 2 and gear-box 1, and bushing 9 is being set close to 2 position of pneumatics case, realize pneumatics case 2 with
Second sealing between gear-box 1, the micro lubricating oil by oil sealing 8 enters pneumatics case 2 using bushing 9 in order to prevent
Influence compressed air quality, drain path 10 be set on link block 4, drain path 10 is communicated with the atmosphere, in this way, in this way,
When air compressor is run, the gap fluctuated between bushing 9 and rotary shaft can both limit the infiltration of the compressed air in pneumatics case 2
It crosses bushing 9 and air compressor is leaked out by drain path 10, seeped after also capable of preventing the oil leak leaked out at oil sealing 8
Enter pneumatics case 2 through bushing.In addition, the air pressure in the drain path 10 communicated with atmosphere is less than the air pressure in pneumatics case 2,
The draught head can effectively prevent to leak using bushing 9 into pneumatics case 2 by the lubricating oil of oil sealing 8, and utilize the gas
Sky is discharged by drain path 10 in the micro lubricating oil leaked out from oil sealing 8 (having had changed into lubrication oil vapour) by pressure difference
Air compressor, into atmosphere.In this way, by multiple tracks processing means, it, also can be by draining even if there is micro lubricating oil to permeate oil sealing 8
Channel 10 is handled, and enters pneumatics case 2 without having an opportunity to permeate bushing 9 again.In such manner, it is possible to ensure in pneumatics case 2 always
Compressed air improves compressed air quality in no oil condition, meets fuel cell, medicine and other fields requirement.It is of the present invention
Oil-free air compressor sealing structure, structure is simple, and manufacturing cost is low, the oil leak that can be effectively prevent in gear-box
To pneumatics case, and the compressed air pressure being able to maintain that in pneumatics case, meet the completely oil-free requirement of compressed air, improves compression
Air quality.
Oil sealing 8 between the rotary shaft 3 and mounting hole 5 is positioned close to 1 side of gear-box, rotary shaft 3 and installation
Bushing 9 between hole 5 is positioned close to 2 side of pneumatics case, multiple tracks recessed pockets 12 be arranged in the rotary shaft 3, and per pass is recessed
Slot 12 is respectively set to the structure along rotary shaft 3 one weeks arrangements, and bushing 9 is ring structure, and multiple tracks protrusion bar is arranged in 9 inner wall of bushing
13, per pass protrusion bar 13 is set as the structure along 9 inner wall of bushing one week arrangement, the diameter ruler of the bushing inner ring of the bushing 9
The structure of the very little diameter dimension for being set greater than 3 section of rotary shaft, rotary shaft are configured in bush hole along rotary shaft axis
To structure free to slide.Above structure, by using produced by the gap constantly fluctuated between 9 inner wall of bushing and rotary shaft 3
Throttling action, can effectively prevent lubricating oil infiltration bushing enter pneumatics case.Air compressor at runtime, in synchromesh gear
Drive and bearing bearing under, rotor (power rotor, driven rotor) is rotated synchronously around respective axis, while in gear-box
Lubricating oil synchromesh gear and bearing are lubricated and are cooled down.Oil sealing limits a large amount of leakages of the lubricating oil to pneumatics case, but
Micro lubricating oil is had to seep by the gap between oil sealing and rotary shaft to pneumatics case.It is sealed in this way, bushing is arranged simultaneously.
And bushing and rotary shaft are cooperated by recessed pockets and protrusion bar, in this way, the per pass when bushing is installed in rotary shaft, on bushing
Protrusion bar is embedded in one of recessed pockets on the rotary shaft, and is squeezed and deformed and is fitted in recessed pockets, the side with recessed pockets
It is reliable to squeeze fitting, to form effective sealing state, to cooperate with oil sealing and drain path, it is saturating effectively to have prevented lubricating oil
A possibility that crossing bushing and entering pneumatics case, and the oil leak in gear-box can be effectively prevent to pneumatics case, it maintains
Compressed air pressure in pneumatics case.
The section that the multiple tracks recessed pockets 12 in rotary shaft 3 stated are set as axial direction is serrated structure, 9 inner wall of bushing
On multiple tracks protrusion bar 13 be set as the section of axial direction and be serrated structure.Above structure utilizes 9 inner wall of bushing and rotation
Throttling action caused by the gap constantly fluctuated between axis 3 can effectively prevent lubricating oil infiltration bushing from entering pneumatics case, mention
The compressed air quality of high pneumatics case, and the compressed air that can be limited in pneumatics case enters drain path by bushing, to tie up
Hold the air pressure of compressed air in pneumatics case.
The bushing 9 is set as using structure made of high temperature resistant, corrosion-resistant, creep resisting thermoplastic material.It is described
The rotary shaft 3 of oil-free air compressor sealing structure, link block 4 be all made of that thermal expansion coefficient is low and thermal deformation does not influence to serve as a contrast
Structure made of the material in gap between set 9 and rotary shaft 3.Above structure, bushing is using high temperature resistant, corrosion-resistant, creep resisting
Thermoplastic material, rotary shaft, link block are all made of the thermal expansion coefficient material lower than lagging material.When air compressor is run,
As the temperature rises, the lower link block of thermal expansion coefficient limits the thermal deformation for the bushing being fitted in mounting hole, rotation
The thermal expansion coefficient of axis is smaller, and the radial clearance between bushing and rotary shaft is made to remain unchanged substantially, guarantees bushing and rotary shaft
Between the sealing performance of the second seal structures that constitutes be not affected by temperature substantially in air compressor operating condition.Bushing
Interference benefit in the mounting hole of link block in outer ring is: when the temperature increases, if connectionless piece, the inside and outside circle of bushing is straight
Diameter can swell, and the gap between bushing inner ring and rotary shaft is caused to become larger, and sealing effect is deteriorated.The interference of bushing outer ring is mounted on company
After connecing the mounting hole of block, because the thermal deformation of link block is small, limit the thermal deformation of bushing, maintain bushing inner ring and rotary shaft it
Between gap be not affected by temperature substantially.
Setting is arranged along 5 one week boss portion of inner wall 15 of connecting hole, oil sealing 8 on 5 inner wall of connecting hole of the link block 4
For the structure that can be resisted against in boss portion 15, bearing installation base 16 is set in rotary shaft 3, bearing 14 be configured to against
Structure on bearing installation base 16.Above structure, boss portion can play reliable position-limiting action to oil sealing, avoid oil seal shaft
To play, positioning is realized, it is ensured that reliability.Position-limiting action plays to bearing in bearing installation base portion, avoids bearing axial float,
Realize positioning, it is ensured that reliability.
Oil sealing is being arranged close to gearbox position, to realize pneumatics in oil-free air compressor sealing structure of the invention
First of sealing between case and gear-box, and bushing is being set close to pneumatics case position, it realizes between pneumatics case and gear-box
Second sealing, in order to prevent the micro lubricating oil by oil sealing using bushing enter pneumatics case influence compressed air matter
Amount, is arranged drain path on link block, and drain path is communicated with the atmosphere, in this way, in this way, serving as a contrast in air compressor operation
The compressed air that the gap fluctuated between set and rotary shaft can both limit in pneumatics case penetrates bushing and passes through drain path
Air compressor is leaked out, bushing is penetrated after capable of also preventing the oil leak leaked out at oil sealing and enters pneumatics case.This
Outside, the air pressure in drain path communicated with atmosphere is less than the air pressure in pneumatics case, which can effectively prevent to pass through oil
The lubricating oil of envelope is leaked using bushing into pneumatics case, and utilizes the draught head, the micro profit that will be leaked out from oil sealing
Air compressor is discharged by drain path in lubricating oil (having had changed into lubrication oil vapour), into atmosphere.In this way, at by multiple tracks
Reason means can also be handled even if there is micro lubricating oil to permeate oil sealing by drain path, without have an opportunity to permeate bushing again and into
Enter pneumatics case, improves air compressor quality.In such manner, it is possible to ensure always compressed air in pneumatics case in no oil condition,
Compressed air quality is improved, fuel cell, medicine and other fields requirement are met.Oil-free air compressor sealing structure of the invention,
Structure is simple, and manufacturing cost is low, oil leak in gear-box can be effectively prevent to pneumatics case, and be able to maintain that pneumatics case
Interior compressed air pressure meets the completely oil-free requirement of compressed air, improves air compressor quality.
Above in conjunction with attached drawing, an exemplary description of the invention, it is clear that concrete implementation of the present invention is not by above-mentioned
The limitation of mode, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved by this
The conception and technical scheme of invention directly apply to other occasions, are within the scope of the invention.
Claims (5)
1. a kind of oil-free air compressor sealing structure, it is characterised in that: the oil-free air compressor sealing structure includes
Air compressor shell, the air compressor casing body is interior to be arranged gear-box (1), pneumatics case (2), and rotary shaft (3) one end is prolonged
It reaches in gear-box (1), rotary shaft (3) other end extends in pneumatics case (2), also sets up link block in air compressor casing body
(4), for separating gear-box (1) and pneumatics case (2) mounting hole (5) are arranged on link block (4), rotation in the link block (4)
Axis (3) is movably arranged in mounting hole (5), is extended to setting synchromesh gear (6) in the rotary shaft (3) in gear-box (1), is extended
Rotor (7) are set on to the rotary shaft (3) in pneumatics case (2), oil sealing (8) are set between rotary shaft (3) and mounting hole (5), rotation
It is also set up between shaft (3) and mounting hole (5) bushing (9), drain path (10) is set on the link block (4), it is described to let out
Oily channel (10) one end extends to the re-entrant portion (11) between oil sealing (8) and bushing (9), drain path (10) other end and big
Gas connection；
Oil sealing (8) between the rotary shaft (3) and mounting hole (5) is positioned close to gear-box (1) side, rotary shaft (3)
Bushing (9) between mounting hole (5) is positioned close to pneumatics case (2) side, and setting multiple tracks is recessed in the rotary shaft (3)
Slot (12), per pass recessed pockets (12) are respectively set to the structure along rotary shaft (3) one weeks arrangements, and bushing (9) is ring structure, lining
(9) inner wall setting multiple tracks protrusion bar (13) is covered, per pass protrusion bar (13) is set as the structure along bushing (9) inner wall one week arrangement,
The diameter dimension of the bushing inner ring of the bushing (9) is set greater than the structure of the diameter dimension of rotation shaft section.
2. oil-free air compressor sealing structure according to claim 1, it is characterised in that: in the rotary shaft (3)
Multiple tracks recessed pockets (12) be set as the section of axial direction and be serrated structure, the multiple tracks protrusion bar on bushing (9) inner wall
(13) section for being set as axial direction is serrated structure.
3. oil-free air compressor sealing structure according to claim 1, it is characterised in that: bushing (9) setting
For using structure made of high temperature resistant, corrosion-resistant, creep resisting thermoplastic material.
4. oil-free air compressor sealing structure according to claim 1, it is characterised in that: the oil-free air compression
The rotary shaft (3) of secret seal structure, link block (4) are all made of that thermal expansion coefficient is low and thermal deformation does not influence bushing (9) and rotation
Structure made of the material in gap between axis (3).
5. oil-free air compressor sealing structure according to claim 1, it is characterised in that: the link block (4)
It is arranged on connecting hole (5) inner wall along connecting hole (5) one week boss portion of inner wall (15), oil sealing (8) is configured to be resisted against convex
Structure in platform portion (15), is arranged bearing installation base (16) in rotary shaft (3), and bearing (14) is configured to be resisted against bearing
Structure on installation base (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083831.XA CN107630816B (en) | 2017-11-07 | 2017-11-07 | A kind of oil-free air compressor sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083831.XA CN107630816B (en) | 2017-11-07 | 2017-11-07 | A kind of oil-free air compressor sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107630816A CN107630816A (en) | 2018-01-26 |
| CN107630816B true CN107630816B (en) | 2019-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711083831.XA Active CN107630816B (en) | 2017-11-07 | 2017-11-07 | A kind of oil-free air compressor sealing structure |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7163726B2 (en) * | 2018-11-07 | 2022-11-01 | トヨタ自動車株式会社 | Fuel cell system and fuel cell vehicle |
| CN109958626B (en) * | 2019-04-04 | 2022-04-22 | 烟台东德氢能技术有限公司 | Lubricating oil leakage-proof device of air compressor |
| CN109944798B (en) * | 2019-04-04 | 2023-11-17 | 烟台东德氢能技术有限公司 | Six-blade Roots supercharger |
| CN110925207B (en) * | 2019-12-02 | 2021-09-07 | 青岛科技大学 | Hydrogen circulating pump oil leakage prevention device and method thereof |
| CN113175480B (en) * | 2021-05-18 | 2023-01-06 | 杰锋汽车动力***股份有限公司 | Hydrogen circulating pump bearing structure |
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| CN200943698Y (en) * | 2006-07-07 | 2007-09-05 | 孟维安 | Lubricating and sealing device for crusher rotary main axis |
| CN101158355A (en) * | 2007-11-27 | 2008-04-09 | 无锡压缩机股份有限公司 | Dry helical lobe compressor host rotor spindle rotor spindle sealing structure |
| CN204357705U (en) * | 2014-12-31 | 2015-05-27 | 戴映红 | A kind of sealing configuration of Roots pump |
| JP2017125457A (en) * | 2016-01-14 | 2017-07-20 | 株式会社神戸製鋼所 | Oil free screw compressor |
| CN107076146A (en) * | 2014-09-29 | 2017-08-18 | 株式会社神户制钢所 | oil free screw compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200943698Y (en) * | 2006-07-07 | 2007-09-05 | 孟维安 | Lubricating and sealing device for crusher rotary main axis |
| CN101158355A (en) * | 2007-11-27 | 2008-04-09 | 无锡压缩机股份有限公司 | Dry helical lobe compressor host rotor spindle rotor spindle sealing structure |
| CN107076146A (en) * | 2014-09-29 | 2017-08-18 | 株式会社神户制钢所 | oil free screw compressor |
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| JP2017125457A (en) * | 2016-01-14 | 2017-07-20 | 株式会社神戸製鋼所 | Oil free screw compressor |
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| CN107630816A (en) | 2018-01-26 |
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