CN208252774U - Air tight means for main shaft - Google Patents
Air tight means for main shaft Download PDFInfo
- Publication number
- CN208252774U CN208252774U CN201820409744.2U CN201820409744U CN208252774U CN 208252774 U CN208252774 U CN 208252774U CN 201820409744 U CN201820409744 U CN 201820409744U CN 208252774 U CN208252774 U CN 208252774U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- distribution plate
- end cap
- air tight
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Abstract
The utility model provides a kind of air tight means for main shaft, is successively arranged with bearing, sleeve and spindle box and end cap outside main shaft, air tight means for main shaft includes the distribution plate for being sheathed on end cap upper and lower ends, gland and the inlet channel for being passed through compressed gas；Distribution plate is along the circumferential direction evenly arranged with several radial through-hole, and inlet channel is connected to the radial through-hole, and end is shifted to install with each radial through-hole.The utility model between gland and end cap by being arranged distribution plate, and several radial through-hole being connected to inlet channel dislocation are along the circumferential direction evenly arranged in distribution plate, compressed gas is forced to be dispersed along the circumferencial direction of distribution plate, and it is passed through from each radial through-hole, i.e. compressed gas is uniformly distributed along the circumferencial direction of main shaft, to avoid close to inlet channel side and far from the side of inlet channel, the inconsistent problem of two sides gas flow rate, and then reduce foreign matter and enter main shaft, extend the service life of main shaft and bearing.
Description
Technical field
The utility model relates to Computerized Numerical Control processing technology fields, and in particular to a kind of air tight means for main shaft.
Background technique
As High Speed Computerized Numerical Control Machine Tools develop, the revolving speed of main shaft is continuously improved, and high-speed precision bearing is widely applied, bearing
Sealing dust-proof is particularly important.
Existing main shaft generally uses labyrinth structure to be passed through the air-flow of certain pressure and flow again, with prevent external foreign matter into
Enter main shaft.As shown in Figure 1 and Figure 2, it is equipped with labyrinth tooth row 100 on the outside of main shaft, is provided with toroidal cavity 200 in the middle part of labyrinth tooth row 100,
Air-flow enters from main shaft side in toroidal cavity 200 and full of toroidal cavity 200, then directly escapes from 100 both ends of labyrinth tooth row,
And it is discharged on the outside of main shaft.
Since gas source enters from the side of main shaft, then the air-flow velocity of discharge close to 300 side of air inlet is than the other side
The air-flow velocity of discharge is big, easily lead to the weaker side foreign matter of air-flow discharge flow velocity and enter, so as to shorten main shaft and bearing
Service life.
Utility model content
The main purpose of the utility model is to provide a kind of air tight means for main shaft, it is intended to solve existing main shaft logical
Enter the problem of weak side of its air-flow still easily enters foreign matter after air-flow.
In order to solve the above technical problems, being successively arranged with outside main shaft the utility model proposes a kind of air tight means for main shaft
Bearing, sleeve and spindle box, and it is sheathed on the end cap on the outside of main shaft and being located at below bearing, the air tight means for main shaft packet
The distribution plate and gland for being sheathed on the end cap upper and lower ends are included, the distribution plate is also located between end cap and the lower part of gland；
The air tight means for main shaft further includes the inlet channel for sequentially passing through the spindle box, sleeve and gland, the inlet channel
End be located on the outside of distribution plate, for being passed through compressed gas；
The distribution plate is along the circumferential direction evenly arranged with several radial through-hole, the inlet channel and the radial through-hole
Connection, and end is shifted to install with each radial through-hole.
Preferably, first annular cavity is respectively arranged between the end of the distribution plate and the inlet channel, end cap
With the second annular housing.
Preferably, first annular gap and second are respectively equipped between the top of the end cap and the gland, distribution plate
Annular gap, the first annular gap are located at below main shaft bearing, connect on the outside of second annular gap and the end cap
It is logical.
Preferably, the end cap is additionally provided with annular convex platform below distribution plate, and the upper surface of the annular convex platform is set
It is equipped with annular groove, the annular groove is connected to the outside of second annular gap, the end cap respectively.
Preferably, the first annular gap is less than the second annular gap.
Preferably, the first sealant is equipped between the distribution plate outer wall and the inner wall of gland lower part.
Preferably, the second sealant is equipped between the end cap inner wall and main shaft.
Preferably, the interior dottle pin connecting respectively with the spindle outer wall, gland upper end is provided with below the main shaft bearing
With outer dottle pin, the interior dottle pin and outer dottle pin are staggered up and down.
Preferably, the interior dottle pin and outer dottle pin and main shaft, end cap, the expansion chamber that annular is provided between gland, it is described
Expansion chamber is connected to the first annular gap, and compressed gas is upwardly into the expansion chamber along the first annular gap, is used
In prevent the lubricating oil in the main shaft bearing flow down.
The utility model is along the circumferential direction uniformly arranged by the way that distribution plate is arranged between gland and end cap, and in distribution plate
There are several radial through-hole for misplacing with inlet channel and be connected to, force circumferencial direction dispersion of the compressed gas along distribution plate, and from every
One radial through-hole passes through, i.e., compressed gas is uniformly distributed along the circumferencial direction of main shaft, thus avoid close to inlet channel side with it is separate
The side of inlet channel, the inconsistent problem of two sides gas flow rate, and then reduce foreign matter and enter main shaft extend main shaft and bearing
Service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of main shaft in the prior art；
Fig. 2 moves towards schematic diagram for the air-flow in toroidal cavity in the prior art；
Fig. 3 is the structural schematic diagram of the utility model air tight means for main shaft；
Fig. 4 is that air-flow when compressed gas passes through distribution plate in the utility model moves towards figure；
Fig. 5 is the top view of distribution plate in the utility model air tight means for main shaft.
Drawing reference numeral explanation:
Specific embodiment
The embodiments of the present invention are described below in detail, the example of embodiment is shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the utility model, and should not be understood as the limit to the utility model
System, based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
The utility model proposes a kind of 10 gas sealing mechanisms of main shaft, as shown in figure 3, being successively arranged with bearing outside main shaft 10
80, sleeve 60 and spindle box 50, and be sheathed on 10 outside of main shaft and be located at the end cap 20 of 80 lower section of bearing, 10 hermetic seal of main shaft
Device includes the distribution plate 30 and gland 40 for being sheathed on 20 upper and lower ends of end cap, and distribution plate 30 is also located at end cap 20 and gland 40
Between lower part；10 gas sealing mechanism of main shaft further includes the inlet channel 70 for sequentially passing through spindle box 50, sleeve 60 and gland 40, into
The end in gas channel 70 is located at 30 outside of distribution plate, for being passed through compressed gas；
As shown in Figure 4, Figure 5, distribution plate 30 is along the circumferential direction evenly arranged with several radial through-hole, inlet channel 70 and diameter
It is connected to through-hole, and end is shifted to install with each radial through-hole.
In the utility model embodiment, the top of gland 40 is connect with sleeve 60, and middle part is equipped with inlet channel 70, lower part
Inner wall connect with distribution plate 30.It is constituted between 20 outer wall of lower end surface and end cap on 40 top of gland, the inner wall of 40 lower part of gland
Annular space, distribution plate 30 are located in the annular space.
The head end of inlet channel 70 is parallel to 10 axial direction of main shaft or the axis perpendicular to main shaft 10 for being passed through compressed gas, edge
To setting, the end of inlet channel 70 is arranged radially along main shaft 10, and outside is sealed by the plug being set in gland 40.Pressure
When contracting gas reaches the outside of distribution plate 30 through inlet channel 70, since inlet channel 70 and distribution plate 30 are along the circumferential direction uniformly distributed
Radial through-hole dislocation, compressed gas can not be directly through distribution plate 30, therefore forces compressed gas along the circle of distribution plate 30
Circumferential direction dispersion, and passed through from each radial through-hole, i.e., compressed gas is uniformly distributed along the circumferencial direction of main shaft 10, to avoid close
70 side of inlet channel and far from inlet channel 70 side, the inconsistent problem of two sides gas flow rate, so reduce foreign matter into
Enter main shaft 10, extends the service life of main shaft 10 and bearing 80.
In a preferred embodiment, as shown in Figure 3, Figure 4, between the end of distribution plate 30 and inlet channel 70, end cap 20
It is respectively arranged with first annular cavity 32 and the second annular housing 33.
In the utility model embodiment, compressed gas from 70 end of inlet channel enter first annular cavity 32, via point
Radial through-hole with disk 30 imports the second annular housing 33 after evenly distributing.Since first annular cavity 32 and inlet channel 70 are straight
It connects and is connected, while providing cushion space for compressed gas, make compressed gas before entering radial through-hole, quickly along first
The circumference of annular housing 32 is mobile, evenly distributes again via radial through-hole thereafter and enters the second annular housing 33, further
Guarantee that compressed gas can be evenly distributed along the circumferencial direction of main shaft 10.
In a preferred embodiment, as shown in figure 3, being respectively equipped between the top of end cap 20 and gland 40, distribution plate 30
First annular gap 21 and the second annular gap 22, first annular gap 21 are located at 80 lower section of main shaft bearing, the second annular gap
22 are connected to the outside of end cap 20.
In the utility model embodiment, the inner wall of distribution plate 30 is processed using high-precision, and according to it is actually required there are
Certain surplus forms the second annular gap 22.After compressed gas enters the second annular housing 33, it is divided into two paths: to enterprising
Enter first annular gap 21, to realize the effect of oil sealing；Be downwardly into the second annular gap 22, and to 20 outside of end cap, i.e., it is outer
Boundary's discharge, can be discharged foreign matter, while reducing external foreign matter and entering main shaft 10.
In a preferred embodiment, as shown in figure 3, end cap 20 is additionally provided with annular convex platform 24 in the lower section of distribution plate 30,
The upper surface of annular convex platform 24 is provided with annular groove 25, annular groove 25 respectively with the second annular gap 22, end cap 20 it is outer
Side connection.
In the utility model embodiment, the upper surface of annular convex platform 24 and the lower end surface of distribution plate 30 are affixed, and are formed not
Less than the third space 23 of 22 width of the second annular gap.Meanwhile annular groove 25, compression is arranged in the upper surface of annular convex platform 24
After gas is exported from the second annular gap 22, it is discharged by the annular groove 25 and third space 23.Wherein, third space 23 with
Second annular gap 22 is vertical, so that extraneous foreign matter is more difficult to enter in main shaft 10 by the second annular gap 22.Even if different
Object passes through third space 23, and due to being additionally provided with annular groove 25 between the second annular gap 22 and third space 23, annular is recessed
The foreign matter that slot 25 can enter collection across third space 23.Therefore between third space 23, annular groove 25 and the second annular
Gap 22 constitutes three-layer protection, prevents external foreign matter from entering main shaft 10.
In a preferred embodiment, first annular gap 21 is less than the second annular gap 22, keep compressed gas most of from
It is discharged in second annular gap 22, fraction enters first annular gap 21, to effectively reduce foreign matter from the second annular gap
22 enter main shaft 10.
In a preferred embodiment, it is equipped with the first sealant between the inner wall of 40 lower part of 30 outer wall of distribution plate and gland, prevents
Only enter main shaft 10 in fit clearance of the foreign matter between distribution plate 30 and gland 40.
In a preferred embodiment, it is equipped with the second sealant between 20 inner wall of end cap and main shaft 10, prevents foreign matter from end cap
Enter in fit clearance between 20 and main shaft 10.
In a preferred embodiment, as shown in figure 3, be provided with below main shaft bearing 80 respectively with 10 outer wall of main shaft, gland
The interior dottle pin 81 and outer dottle pin 82 of 40 upper ends connection, interior dottle pin 81 and about 82 outer dottle pin are staggered.
In the utility model embodiment, the upper surface of gland 40 lower end with the lower end surface of outer dottle pin 82, sleeve 60 respectively
Face is affixed, and interior dottle pin 81 and outer dottle pin 82 are annular, and the inner wall of interior dottle pin 81 is connect with 10 outer wall of main shaft, outside outer dottle pin 82
Wall is connect with 60 inner wall of sleeve, and the outer rim of interior dottle pin 81 and the inner edge of outer dottle pin 82 are interlaced, prevents the lubrication in bearing 80
Oil directly instills the end cap 20 of lower section and distribution plate 30 waits in components.
In a preferred embodiment, as shown in figure 3, interior dottle pin 81 and outer dottle pin 82 and main shaft 10, end cap 20, gland 40 it
Between be provided with the expansion chamber 90 of annular, expansion chamber 90 is connected to first annular gap 21, and compressed gas is along first annular gap 21
It is upwardly into expansion chamber 90, for preventing the lubricating oil in bearing 80 from flowing down.
In the utility model embodiment, the inner wall on 40 top of gland, the lower end surface of interior dottle pin 81 and outer dottle pin 82, end cap 20
Upper surface and 10 outer wall of main shaft mutually enclose constitute expansion chamber 90, compressed gas by first annular gap 21 enter have one
Determine the expansion chamber in space, gas rapid expanding, kinetic energy reduces, and a small amount of gas continues through between interior dottle pin 81 and outer dottle pin 82
Gap is upward, therefore achievees the effect that oil sealing, prevents lubricating oil in bearing 80 to flowing down.
It is to be appreciated that the technical solution between each embodiment of the utility model can be combined with each other, but must be with
It, should when the combination of technical solution appearance is conflicting or cannot achieve based on those of ordinary skill in the art can be realized
Think that the combination of this technical solution is not present, also not within the scope of the requires of the utility model is protected.
Therefore above part for being only the utility model or preferred embodiment, either text or attached drawing cannot all limit
The range of the utility model protection processed is illustrated under all designs with one entirety of the utility model using the utility model
Equivalent structure transformation made by book and accompanying drawing content, or directly/be used in other related technical areas indirectly and be included in this
In the range of utility model protection.
Claims (9)
1. a kind of air tight means for main shaft, main shaft is successively arranged with bearing, sleeve and spindle box outside, and is sheathed on the outside of main shaft
And it is located at the end cap below bearing, which is characterized in that the air tight means for main shaft includes being sheathed on the end cap upper and lower ends
Distribution plate and gland, the distribution plate is also located between end cap and the lower part of gland；The air tight means for main shaft further includes
The inlet channel of the spindle box, sleeve and gland is sequentially passed through, the end of the inlet channel is located on the outside of distribution plate, is used for
It is passed through compressed gas；
The distribution plate is along the circumferential direction evenly arranged with several radial through-hole, and the inlet channel and the radial through-hole connect
It is logical, and end is shifted to install with each radial through-hole.
2. air tight means for main shaft as described in claim 1, which is characterized in that the end of the distribution plate and the inlet channel
First annular cavity and the second annular housing are respectively arranged between end, end cap.
3. air tight means for main shaft as claimed in claim 2, which is characterized in that the top of the end cap and the gland is divided
With first annular gap and the second annular gap is respectively equipped between disk, the first annular gap is located at below main shaft bearing,
Second annular gap is connected to the outside of the end cap.
4. air tight means for main shaft as claimed in claim 3, which is characterized in that the end cap is also set up below distribution plate
There is annular convex platform, the upper surface of the annular convex platform is provided with annular groove, and the annular groove is annular with described second respectively
The outside connection in gap, the end cap.
5. air tight means for main shaft as claimed in claim 3, which is characterized in that the first annular gap is less than the second annular
Gap.
6. air tight means for main shaft as claimed in claim 3, which is characterized in that the distribution plate outer wall is interior with gland lower part
The first sealant is equipped between wall.
7. air tight means for main shaft as claimed in claim 6, which is characterized in that be equipped with the between the end cap inner wall and main shaft
Two sealants.
8. the air tight means for main shaft as described in claim 3-7 any one, which is characterized in that set below the main shaft bearing
It is equipped with the interior dottle pin and outer dottle pin connecting respectively with the spindle outer wall, gland upper end, the interior dottle pin and outer dottle pin are handed over up and down
Mistake setting.
9. air tight means for main shaft as claimed in claim 8, which is characterized in that the interior dottle pin and outer dottle pin and main shaft, end
The expansion chamber of annular is provided between lid, gland, the expansion chamber is connected to the first annular gap, and compressed gas is described in
First annular gap is upwardly into the expansion chamber, for preventing the lubricating oil in the main shaft bearing from flowing down.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820409744.2U CN208252774U (en) | 2018-03-23 | 2018-03-23 | Air tight means for main shaft |
| PCT/CN2018/098309 WO2019178998A1 (en) | 2018-03-23 | 2018-08-02 | Spindle airtight sealing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820409744.2U CN208252774U (en) | 2018-03-23 | 2018-03-23 | Air tight means for main shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208252774U true CN208252774U (en) | 2018-12-18 |
Family
ID=64608897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820409744.2U Active CN208252774U (en) | 2018-03-23 | 2018-03-23 | Air tight means for main shaft |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN208252774U (en) |
| WO (1) | WO2019178998A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538763A (en) * | 2018-12-28 | 2019-03-29 | 广州市威嘉机床有限公司 | A kind of spindle nose gas curtain seals structure |
| CN111716245A (en) * | 2020-06-03 | 2020-09-29 | 广州市昊志机电股份有限公司 | Main shaft structure |
| CN112122630A (en) * | 2020-09-27 | 2020-12-25 | 泉州市井贺精密设备有限公司 | Main shaft seal structure and tool turret |
| CN113389904A (en) * | 2020-03-13 | 2021-09-14 | 立欣精密股份有限公司 | Main shaft structure |
| CN114042945A (en) * | 2021-11-08 | 2022-02-15 | 沈阳城市建设学院 | Drilling and tapping spindle combined type pneumatic sealing structure |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8991829B2 (en) * | 2007-11-20 | 2015-03-31 | The Timken Company | Non-contact labyrinth seal assembly and method of construction thereof |
| US9068571B2 (en) * | 2009-04-03 | 2015-06-30 | Ergoseal, Inc. | Seal for oil-free rotary displacement compressor |
| CN102644755B (en) * | 2012-04-25 | 2015-10-21 | 蓝星沈阳轻工机械设计研究所 | A kind of sealing configuration of powder feeder running shaft |
| JP6212769B2 (en) * | 2013-04-04 | 2017-10-18 | 三菱重工環境・化学エンジニアリング株式会社 | Seal structure and crushing apparatus provided with the seal structure |
| CN203516746U (en) * | 2013-08-29 | 2014-04-02 | 昆山允可精密工业技术有限公司 | High-speed precise rotating shaft adopting high-pressure seal |
| CN205401721U (en) * | 2016-03-11 | 2016-07-27 | 广州凯里莱电气机械有限公司 | Electronic flapper liquid packing seal structure |
| CN206682316U (en) * | 2017-04-27 | 2017-11-28 | 湖北毅兴智能装备股份有限公司 | A kind of high speed drill attacks owner's axle integral sealing safeguard structure |
| CN107631029A (en) * | 2017-10-23 | 2018-01-26 | 广州凯里莱电气机械有限公司 | A kind of secondary liquid packing sealing structure applied to absorption tower side stir device |
-
2018
- 2018-03-23 CN CN201820409744.2U patent/CN208252774U/en active Active
- 2018-08-02 WO PCT/CN2018/098309 patent/WO2019178998A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538763A (en) * | 2018-12-28 | 2019-03-29 | 广州市威嘉机床有限公司 | A kind of spindle nose gas curtain seals structure |
| CN113389904A (en) * | 2020-03-13 | 2021-09-14 | 立欣精密股份有限公司 | Main shaft structure |
| CN111716245A (en) * | 2020-06-03 | 2020-09-29 | 广州市昊志机电股份有限公司 | Main shaft structure |
| CN112122630A (en) * | 2020-09-27 | 2020-12-25 | 泉州市井贺精密设备有限公司 | Main shaft seal structure and tool turret |
| CN114042945A (en) * | 2021-11-08 | 2022-02-15 | 沈阳城市建设学院 | Drilling and tapping spindle combined type pneumatic sealing structure |
| CN114042945B (en) * | 2021-11-08 | 2024-05-28 | 沈阳城市建设学院 | Drilling and tapping machine main shaft combined pneumatic sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019178998A1 (en) | 2019-09-26 |
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