CN107630816A - 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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- CN107630816A CN107630816A CN201711083831.XA CN201711083831A CN107630816A CN 107630816 A CN107630816 A CN 107630816A CN 201711083831 A CN201711083831 A CN 201711083831A CN 107630816 A CN107630816 A CN 107630816A
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- oil
- rotary shaft
- bushing
- air compressor
- gear
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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 is extended in gear-box (1),Rotary shaft (3) other end is extended in pneumatics case (2),Mounting hole (5) is set on contiguous block (4),Rotary shaft (3) is movably arranged in mounting hole (5),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) one end set on contiguous block (4) extends to re-entrant portion (11),Drain path (10) other end and atmosphere,The oil-free air compressor sealing structure of the present invention,It is simple in construction,Cost is low,Oil leak in gear-box can be prevented to pneumatics case,Improve compressed air quality,Maintain the compressed air pressure in pneumatics case.
Description
Technical field
The invention belongs to automobile air compressor parts technical field, is to be related to a kind of oil-free air more specifically
Compressor seal structure.
Background technology
In air compressor, the power that a pair of synchromesh gears in compressor gear-box are used to transmit input shaft distributes
To driving shaft, driven shaft.Under bearing supporting, driving shaft, driven shaft drive power rotor, driven rotor in pneumatics case to revolve
Turn, convey a large amount of gas compressions and outwards.In the process of running, the bearing in gear-box and synchromesh gear need lubricating oil to enter
Row lubrication and cooling.Air compressor system for requiring the complete oil-free of compressed air applied to fuel cell, medicine etc., it is
Prevent the oil leak in gear-box to pneumatics case, it is necessary to set sealing structure between pneumatics case and gear-box.Generally,
Oil sealing can be set between pneumatics case and gear-box.On the rotary shaft, oil sealing inner ring is with rotating for oil sealing inner ring card with toughness
Oil film between axle can prevent oil sealing from being damaged rapidly because of friction.But still suffer from parts of lubricating oil and pass through oil sealing and rotation
Clearance leakage between axle is to pneumatics case.If second oil sealing is set, if between the inner ring of second oil sealing and rotary shaft not
Oil film can be set up rapidly, then the oil sealing can damage rapidly because of the friction of rotary shaft.
The content of the invention
The technical problems to be solved by the invention are：Offer is a kind of simple in construction, and manufacturing cost is low, can effectively prevent tooth
Oil leak in roller box is able to maintain that pneumatics case inner air pressure to pneumatics case, the guarantee complete oil-free of compressed air,
Improve the oil-free air compressor sealing structure of air compressor overall performance.
Solves the problems, such as techniques discussed above, the technical scheme that the present invention takes is：
The present invention is a kind of oil-free air compressor sealing structure, and described oil-free air compressor sealing structure includes sky
Air compressor housing, described air compressor casing body is interior to set gear-box, pneumatics case, and rotary shaft one end extends to gear-box
Interior, the rotary shaft other end is extended in pneumatics case, and contiguous block is also set up in air compressor casing body, and described contiguous block is used to divide
Every setting mounting hole on gear-box and pneumatics case, contiguous 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, set between rotary shaft and mounting hole
Oil sealing, bushing is also set up between rotary shaft and mounting hole, drain path, described drain path one end are set on described contiguous block
The re-entrant portion extended between oil sealing and bushing, the drain path other end and atmosphere.
Oil sealing between described 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 described rotary shaft, and per pass recessed pockets are respectively set to
Along the structure of one week arrangement of rotary shaft, bushing is loop configuration, and bushing inwall sets multiple tracks protrusion bar, and per pass protrusion bar is arranged to
Along the structure of one week arrangement of bushing inwall, the diameter dimension of the bushing inner ring of described bushing is set greater than rotating shaft section
The structure of diameter dimension.
The section that multiple tracks recessed pockets in the rotary shaft stated are arranged to axial direction is serrated structure, on bushing inwall
The section that multiple tracks protrusion bar is arranged to axial direction is serrated structure.
Described bushing is arranged to using structure made of high temperature resistant, corrosion-resistant, creep resisting thermoplastic.
The rotary shaft of described oil-free air compressor sealing structure, contiguous block use thermal coefficient of expansion low and thermal change
Shape does not influence structure made of the material in gap between bushing and rotary shaft.
Set on the connecting hole inwall of described contiguous block and be configured to along the connecting hole inwall boss portion of one week, oil sealing
The structure being resisted against in boss portion, sets bearing installation base in rotary shaft, and bearing is configured to be resisted against bearing installation convex
Structure on platform.
Using technical scheme, following beneficial effect can be obtained：
The oil-free air compressor sealing structure of the present invention, oil sealing is being set close to gearbox position, so as to realize pneumatics
First of sealing between case and gear-box, and bushing is being set close to pneumatics case position, realize between pneumatics case and gear-box
Second sealing, in order to prevent the micro lubricating oil by oil sealing again by bushing and enter pneumatics case influence compressed air matter
Amount, sets drain path, drain path and atmosphere on contiguous block, so, so, when air compressor is run, lining
The compressed air that the gap fluctuated between set and rotary shaft can have both been limited in pneumatics case penetrates bushing and passes through drain path
Air compressor is leaked out, bushing is penetrated after the oil leak that can also prevent to leak out at oil sealing and enters pneumatics case.This
Outside, the air pressure in the drain path communicated with air is less than the air pressure in pneumatics case, and the draught head can effectively prevent to pass through oil
The lubricating oil of envelope passes through bushing seepage into pneumatics case again, and utilizes the draught head, the micro profit that will be leaked out at oil sealing
Lubricating oil (having had changed into lubrication oil vapour) discharges air compressor by drain path, into air.So, at by multiple tracks
It reason means, even if there is micro lubricating oil to permeate oil sealing, can also be handled by drain path, enter without having an opportunity to permeate bushing again
Enter pneumatics case, improve air compressor quality.In such manner, it is possible to ensure that the compressed air in pneumatics case is in without oil condition all the time,
Compressed air quality is improved, meets fuel cell, medicine and other fields requirement.The oil-free air compressor sealing structure of the present invention,
Simple in construction, manufacturing cost is low, can effectively prevent the oil leak in gear-box to pneumatics case, and be able to maintain that pneumatics case
Interior compressed air pressure, meet the requirement of the complete oil-free of compressed air, improve air compressor quality.
Brief description of the drawings
Brief description is made to the content expressed by each accompanying drawing of this specification and the mark 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 close-up schematic view of the sealing position of the oil-free air compressor sealing structure described in Fig. 1；
In accompanying drawing mark for：1st, gear-box；2nd, pneumatics case；3rd, rotary shaft；4th, contiguous block；5th, mounting hole；6th, synchromesh gear；
7th, rotor；8th, oil sealing；9th, bushing；10th, drain path；11st, re-entrant portion；12nd, recessed pockets；13rd, protrusion bar；14th, bearing；15、
Boss portion；16th, bearing installation base.
Embodiment
Below against accompanying drawing, by the description to embodiment, each structure for example involved to the embodiment of the present invention
The works such as mutual alignment and annexation, the effect of each several part and operation principle between the shape of part, construction, each several part are further
Detailed description：
As shown in accompanying drawing 1, accompanying drawing 2, the present invention is a kind of oil-free air compressor sealing structure, described oil-free air pressure
The secret seal structure that contracts includes air compressor housing, and gear-box 1, pneumatics case 2, rotation are set in described air compressor casing body
The one end of axle 3 is extended in gear-box 1, and the other end of rotary shaft 3 is extended in pneumatics case 2, the company of also setting up in air compressor casing body
Block 4 is connect, described contiguous block 4 is used to separate gear-box 1 and pneumatics case 2, and mounting hole 5, the activity of rotary shaft 3 are set on contiguous block 4
In mounting hole 5, setting synchromesh gear 6, the rotation extended in pneumatics case 2 in the rotary shaft 3 in gear-box 1 are extended to
Rotor 7 is set on axle 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, the cavity that described one end of drain path 10 is extended between oil sealing 8 and bushing 9 are set on described contiguous block 4
Position 11, the other end of drain path 10 and atmosphere.Said structure, oil sealing 8 is being set close to the position of gear-box 1, so as to real
First of sealing between existing pneumatics case 2 and gear-box 1, and bushing 9 is being set close to the position of pneumatics case 2, realize pneumatics case 2 with
Second sealing between gear-box 1, in order to prevent the micro lubricating oil by oil sealing 8 from entering pneumatics case 2 by bushing 9 again
Compressed air quality is influenceed, drain path 10, drain path 10 and atmosphere are set on contiguous block 4, so, so,
When air compressor is run, the gap fluctuated between bushing 9 and rotary shaft can both limit the compressed air infiltration in pneumatics case 2
Cross bushing 9 and air compressor is leaked out by drain path 10, oozed after the oil leak that can also prevent to leak out at oil sealing 8
Enter pneumatics case 2 through bushing.In addition, the air pressure in the drain path 10 communicated with air is less than the air pressure in pneumatics case 2,
The draught head can effectively prevent to pass through the seepage into pneumatics case 2 of bushing 9 again by the lubricating oil of oil sealing 8, and utilize the gas
Pressure difference, the micro lubricating oil leaked out at oil sealing 8 (having had changed into lubrication oil vapour) is discharged into sky by drain path 10
Air compressor, into air.So,, also can be by draining even if there is micro lubricating oil to permeate oil sealing 8 by multiple tracks processing means
Passage 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 all the time in pneumatics case 2
Compressed air is in without oil condition, improves compressed air quality, meets fuel cell, medicine and other fields requirement.It is of the present invention
Oil-free air compressor sealing structure, simple in construction, manufacturing cost is low, can effectively prevent the oil leak in gear-box
To pneumatics case, and the compressed air pressure being able to maintain that in pneumatics case, meet the requirement of the complete oil-free of compressed air, improve compression
Air quality.
Oil sealing 8 between described rotary shaft 3 and mounting hole 5 is positioned close to the side of gear-box 1, rotary shaft 3 and installation
Bushing 9 between hole 5 is positioned close to the side of pneumatics case 2, set multiple tracks recessed pockets 12 in described rotary shaft 3, per pass is recessed
Groove 12 is respectively set to the structure along 3 one weeks arrangements of rotary shaft, and bushing 9 is loop configuration, and the inwall of bushing 9 sets multiple tracks protrusion bar
13, per pass protrusion bar 13 is arranged to the structure along 9 inwall of bushing, one week arrangement, the diameter chi of the bushing inner ring of described bushing 9
The structure of the very little diameter dimension for being set greater than the section of rotary shaft 3, rotary shaft are configured in bush hole interior edge rotary shaft axle
To structure slidably.Said structure, by using produced by the gap constantly fluctuated between the inwall of bushing 9 and rotary shaft 3
Throttling action, can effectively prevent lubricating oil infiltration bushing enter pneumatics case.Air compressor operationally, in synchromesh gear
Drive and bearing supporting under, rotor (power rotor, driven rotor) makees synchronous axial system around respective axis, while in gear-box
Lubricating oil synchromesh gear and bearing are lubricated and cooled down.Oil sealing limits a large amount of seepages of the lubricating oil to pneumatics case, but
Micro lubricating oil is had to ooze to pneumatics case by the gap between oil sealing and rotary shaft.So, while bushing is set to be sealed.
And bushing and rotary shaft are coordinated by recessed pockets and protrusion bar, so, when bushing is installed in rotary shaft, the per pass on bushing
In one of the recessed pockets of protrusion bar setting-in on the rotary shaft, and crimp is fitted in recessed pockets, the side with recessed pockets
Reliable extruding fitting, so as to form effective sealing state, so as to coordinate with oil sealing and drain path, it is saturating lubricating oil is effectively prevented
Cross bushing and enter the possibility of pneumatics case, and can effectively prevent the oil leak in gear-box from, to pneumatics case, maintaining
Compressed air pressure in pneumatics case.
The section that the multiple tracks recessed pockets 12 in rotary shaft 3 stated are arranged to axial direction is serrated structure, the inwall of bushing 9
On multiple tracks protrusion bar 13 be arranged to the section of axial direction and be serrated structure.Said structure, utilize the inwall of bushing 9 and rotation
Throttling action caused by the gap constantly fluctuated between axle 3, it can effectively prevent lubricating oil infiltration bushing from entering pneumatics case, carry
The compressed air quality of high pneumatics case, and the compressed air in pneumatics case can be limited drain path is entered by bushing, so as to tie up
Hold the air pressure of pneumatics case compressed air.
Described bushing 9 is arranged to using structure made of high temperature resistant, corrosion-resistant, creep resisting thermoplastic.It is described
The rotary shaft 3 of oil-free air compressor sealing structure, contiguous block 4 is low using thermal coefficient of expansion 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.Said structure, bushing is using high temperature resistant, corrosion-resistant, creep resisting
Thermoplastic, rotary shaft, contiguous block are using the thermal coefficient of expansion material lower than lagging material.When air compressor is run,
With the rise of temperature, the relatively low contiguous block of thermal coefficient of expansion limits the thermal deformation for the bushing being fitted in mounting hole, rotation
The thermal coefficient of expansion of axle is smaller, the radial clearance between bushing and rotary shaft is remained unchanged substantially, ensures bushing and rotary shaft
Between the sealing property of the second seal structures that forms be not affected by temperature substantially in air compressor operating condition.Bushing
Outer ring interference is mounted in benefit in the mounting hole of contiguous block：When the temperature increases, if connectionless piece, the inside and outside circle of bushing is straight
Footpath can swell, and cause the gap between bushing inner ring and rotary shaft to become big, sealing effectiveness is deteriorated.The interference of bushing outer ring, which is arranged on, to be connected
After connecing the mounting hole of block, because the thermal deformation of contiguous 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.
Set on the inwall of connecting hole 5 of described contiguous block 4 along the inwall boss portion of one week 15 of connecting hole 5, oil sealing 8 is set
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.Said 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.
The oil-free air compressor sealing structure of the present invention, oil sealing is being set close to gearbox position, so as to realize pneumatics
First of sealing between case and gear-box, and bushing is being set close to pneumatics case position, realize between pneumatics case and gear-box
Second sealing, in order to prevent the micro lubricating oil by oil sealing again by bushing and enter pneumatics case influence compressed air matter
Amount, sets drain path, drain path and atmosphere on contiguous block, so, so, when air compressor is run, lining
The compressed air that the gap fluctuated between set and rotary shaft can have both been limited in pneumatics case penetrates bushing and passes through drain path
Air compressor is leaked out, bushing is penetrated after the oil leak that can also prevent to leak out at oil sealing and enters pneumatics case.This
Outside, the air pressure in the drain path communicated with air is less than the air pressure in pneumatics case, and the draught head can effectively prevent to pass through oil
The lubricating oil of envelope passes through bushing seepage into pneumatics case again, and utilizes the draught head, the micro profit that will be leaked out at oil sealing
Lubricating oil (having had changed into lubrication oil vapour) discharges air compressor by drain path, into air.So, at by multiple tracks
It reason means, even if there is micro lubricating oil to permeate oil sealing, can also be handled by drain path, enter without having an opportunity to permeate bushing again
Enter pneumatics case, improve air compressor quality.In such manner, it is possible to ensure that the compressed air in pneumatics case is in without oil condition all the time,
Compressed air quality is improved, meets fuel cell, medicine and other fields requirement.The oil-free air compressor sealing structure of the present invention,
Simple in construction, manufacturing cost is low, can effectively prevent the oil leak in gear-box to pneumatics case, and be able to maintain that pneumatics case
Interior compressed air pressure, meet the requirement of the complete oil-free of compressed air, improve air compressor quality.
Exemplary description is carried out to the present invention above in conjunction with accompanying drawing, it is clear that concrete implementation of the present invention is not by above-mentioned
The limitation of mode, if the various improvement of inventive concept and technical scheme of the present invention progress are employed, or it is not improved by this
The design of invention and technical scheme directly apply to other occasions, within the scope of the present invention.
Claims (6)
- A kind of 1. oil-free air compressor sealing structure, it is characterised in that：Described oil-free air compressor sealing structure includes Air compressor housing, described air compressor casing body is interior to set gear-box (1), pneumatics case (2), and rotary shaft (3) one end is prolonged Reach in gear-box (1), rotary shaft (3) other end is extended in pneumatics case (2), and contiguous block is also set up in air compressor casing body (4), described contiguous block (4) is used to separate gear-box (1) and pneumatics case (2), and mounting hole (5), rotation are set on contiguous block (4) Axle (3) is movably arranged in mounting hole (5), extends to and synchromesh gear (6) is set in the rotary shaft (3) in gear-box (1), extension Rotor (7) is set on to the rotary shaft (3) in pneumatics case (2), oil sealing (8), rotation are set between rotary shaft (3) and mounting hole (5) Bushing (9) is also set up between rotating shaft (3) and mounting hole (5), drain path (10) is set on described contiguous block (4), it is described to let out The re-entrant portion (11) that oily passage (10) one end is extended between oil sealing (8) and bushing (9), drain path (10) other end with it is big Gas connects.
- 2. oil-free air compressor sealing structure according to claim 1, it is characterised in that：Described rotary shaft (3) and Oil sealing (8) between mounting hole (5) is positioned close to gear-box (1) side, the bushing between rotary shaft (3) and mounting hole (5) (9) it is positioned close to pneumatics case (2) side, multiple tracks recessed pockets (12), per pass recessed pockets (12) be set in described rotary shaft (3) The structure along (3) one weeks arrangements of rotary shaft is respectively set to, bushing (9) is loop configuration, and bushing (9) inwall sets multiple tracks to protrude Bar (13), per pass protrusion bar (13) are arranged to the structure along the arrangement of bushing (9) inwall one week, in the bushing of described bushing (9) The diameter dimension of circle is set greater than rotating the structure of the diameter dimension of shaft section.
- 3. oil-free air compressor sealing structure according to claim 1 or 2, it is characterised in that：Described rotary shaft (3) On multiple tracks recessed pockets (12) be arranged to the section of axial direction and be serrated structure, the multiple tracks protrusion bar on bushing (9) inwall (13) section for being arranged to axial direction is serrated structure.
- 4. oil-free air compressor sealing structure according to claim 1 or 2, it is characterised in that：Described bushing (9) is set It is set to using structure made of high temperature resistant, corrosion-resistant, creep resisting thermoplastic.
- 5. oil-free air compressor sealing structure according to claim 1 or 2, it is characterised in that：Described oil-free air The rotary shaft (3) of compressor seal structure, contiguous block (4) be low using thermal coefficient of expansion and thermal deformation do not influence bushing (9) with Structure made of the material in gap between rotary shaft (3).
- 6. oil-free air compressor sealing structure according to claim 2, it is characterised in that：Described contiguous block (4) Set on connecting hole (5) inwall along connecting hole (5) the inwall boss portion of one week (15), oil sealing (8) is configured to be resisted against convex Structure in platform portion (15), bearing installation base (16) is set 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 |
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| CN107630816A true CN107630816A (en) | 2018-01-26 |
| CN107630816B CN107630816B (en) | 2019-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711083831.XA Active CN107630816B (en) | 2017-11-07 | 2017-11-07 | A kind of oil-free air compressor sealing structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109944798A (en) * | 2019-04-04 | 2019-06-28 | 烟台菱辰能源有限公司 | Six leaf Roots type superchargers |
| CN109958626A (en) * | 2019-04-04 | 2019-07-02 | 烟台菱辰能源有限公司 | The lubricating oil device for preventing leakage of air compressor |
| CN110925207A (en) * | 2019-12-02 | 2020-03-27 | 青岛科技大学 | Hydrogen circulating pump oil leakage prevention device and method thereof |
| CN111162292A (en) * | 2018-11-07 | 2020-05-15 | 丰田自动车株式会社 | Fuel cell system and fuel cell vehicle |
| CN113175480A (en) * | 2021-05-18 | 2021-07-27 | 杰锋汽车动力系统股份有限公司 | Hydrogen circulating pump bearing structure |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113175480A (en) * | 2021-05-18 | 2021-07-27 | 杰锋汽车动力系统股份有限公司 | Hydrogen circulating pump bearing structure |
| CN113175480B (en) * | 2021-05-18 | 2023-01-06 | 杰锋汽车动力系统股份有限公司 | Hydrogen circulating pump bearing structure |
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| CN107630816B (en) | 2019-03-12 |
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