CN102563084A - Bypass air sealing structure - Google Patents
Bypass air sealing structure Download PDFInfo
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- CN102563084A CN102563084A CN2011103827192A CN201110382719A CN102563084A CN 102563084 A CN102563084 A CN 102563084A CN 2011103827192 A CN2011103827192 A CN 2011103827192A CN 201110382719 A CN201110382719 A CN 201110382719A CN 102563084 A CN102563084 A CN 102563084A
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Abstract
The invention relates to a bypass air sealing structure, which overcomes the defects that greases in bearings are easily squeezed out and working conditions are deteriorated as an existing air sealing structure has positive-pressure airflow sprayed out of a gap. The bypass air sealing structure comprises a rotary shaft, a fixing seat and a flange, wherein the fixing seat is connected with the rotary shaft through the bearings, and the flange is fixed onto the fixing seat. A straight channel axially communicated with the flange is arranged on the flange, a through hole axially communicated with the channel is arranged on the fixing seat, the channel is communicated with a gap between the rotary shaft and the flange through a branch, a reducer pipe is arranged at the intersection of the channel and the branch, and airflow enters the channel from one end of the channel communicated with the through hole, and is sprayed out of the other end of the channel. The compressed airflow flows through the channel, so that positive pressure is generated on the branch, and impurities entering from the gap are sucked to the channel and are sprayed out of an outlet of the channel along with the airflow. The impurities cannot intrude into the bearings under the action of the factors of dead weight and differential pressure, the compressed airflow is prevented from eroding the bearings, and the working environment of the bearings is prevented from being deteriorated.
Description
Technical field
The present invention relates to a kind of sealing configuration, especially a kind of bypass hermetic seal structure that adopts negative pressure mediation gap to avoid polluting with the protection bearing.
Background technique
In machining industry, rotating shaft is equipped with flange outward, is connected through bearing between rotating shaft and the flange, and rotating shaft is at high speed rotating, and flange is in stationary state, and the inner ring of bearing rotates with rotating shaft synchronously, and the outer ring and the flange of bearing fix.Have the gap between rotating shaft and the flange, have pulverous dust or smear metal in the processing district again, add man-hour, these impurity can enter in the slit between rotating shaft and the flange and invade in the bearing, cause bearing impaired, the equipment cisco unity malfunction.Especially online cutting industry, mortar is constantly splashing, and invades from the slit more easily.
Therefore seal arrangement need be set between rotating shaft and flange prevent that liquid or above-mentioned impurity outside the rotating shaft from getting into; Common sealing means is by two kinds, and one is to use contact seal material pay the seam, and impurity must not be got into; Material has various wear-resistant seal circles or felt; But but there is friction, possibly produces wearing and tearing and heat, do not suit in high speed, major diameter rotation, to use.The 2nd, adopt pressurized air from the slit, to spray; Promptly in the slit, there is positive pressure air stream; Stop that impurity gets into the slit; This sealing means does not almost have friction and the heating between rotating shaft and the sealing medium to produce, and just consumes a spot of pressurized air, thereby is widely used in high speed, the major diameter rotating environment.
Such as; Patent Office of the People's Republic of China has announced a CN101478190B patent on July 27th, 2011, name is called the hermetic seal construction design method of electric main shaft of oil grease mill, and the air of certain pressure is entered in the annular chamber between baffle plate and the preceding tegillum through the air flue that is provided with on the front-end bearing pedestal; Passing through radially again, inclined hole arrives annular groove; Circle has the gap with preceding nut cylindrical in the baffle plate, and preceding nut designs has saw-tooth grooves corresponding with another annular groove of baffle plate, along with the high speed rotating of rotating shaft; Pressure air forms pressure hermetic seal ring in gap and two grooves, stop that cooling liquid and impurity get into rotating shaft.
But adopt positive pressure air stream as sealing, air-flow also enters in the space of bearing from the slit except from the slit blows out; And blow out from this space; So the steam of air-flow also can invade in the bearing, squeezes the grease in the bearing on the one hand, and the operating mode of bearing is worsened.
Summary of the invention
The invention solves existing hermetic seal structure adopts the malleation air-flow to spray from the slit; Make the defective that grease is squeezed, operating mode worsens in the bearing easily; A kind of bypass hermetic seal structure is provided, has adopted negative pressure, air-flow can outwards not blow out from the inboard of bearing; Guarantee that the grease in the bearing stores, and can not worsen the operating mode of bearing yet.
The technical solution adopted for the present invention to solve the technical problems is: a kind of bypass hermetic seal structure; The fixed base that comprises rotating shaft, links to each other with rotating shaft through bearing and be fixed on the flange on the fixed base; Flange is provided with the straight passage that axial direction is communicated with flange; Fixed base is provided with the through hole of axial communication passage, and this passage communicates with slit between rotating shaft and the flange through branch road, and the intersection with branch road on the passage is provided with reducer pipe; Air-flow gets into from an end of through hole, from the other end ejection of passage.Logical compressed air stream in the passage, passage is a straight passage, and reducer pipe is set in passage; The airflow passes reducer pipe; Cross section reduces gradually, and the flow velocity of air-flow improves gradually, in the high velocity air process; The branch road place produces negative pressure, and this negative pressure will enter into that the impurity slit in is drawn into branch road and along with air-flow enters in the passage and sprays from the outlet of passage; So impure air-flow just can not enter in the bearing in this compressed air stream and the entering slit; Thereby make bearing be in the normal working environment; Bearing neither can be compressed the erosion of air-flow; Grease in the erosion that contains the impurity air-flow that yet can not got in the slit, bearing can not squeezed by air-flow, guarantees the working life of bearing.
As preferably, reducer pipe is middle narrow meshed nozzle, and nozzle cross-section is T-shaped, and flange is provided with the shoulder hole coaxial with passage, and nozzle is embedded in the shoulder hole, and the miner diameter end of nozzle is in the position that crosses of passage and branch road.This is a kind of scheme, and air-flow is through the aperture of nozzle, and the diameter of flowing through diminishes, and the flow velocity of air-flow increases, and improves the negative-pressure adsorption ability of branch road, reduces the impurity storage in the slit, improves impurity cleaning ability, the protection bearing; Nozzle is embedded into shoulder hole, install more convenient, for the sealing, can between the end face of nozzle and fixed base, seal ring be set.
As preferably, the inlet of nozzle is the horn mouth that diameter reduces gradually, and bell-mouthed bigger diameter end is towards the air-flow approach axis, and the outlet of nozzle is the horn mouth that diameter increases, and bell-mouthed bigger diameter end is towards the air-flow emission direction.The aperture of through hole and nozzle reduces airflow strikes, and improves air-flow velocity gradually through the horn mouth transition, after small holes, by the horn mouth ejection, improves the negative-pressure adsorption ability of branch road.
As preferably, reducer pipe is an oviduct, and the bigger diameter end of oviduct is connected with straight tube, and miner diameter end is towards the emission direction of air-flow, and straight tube is connected in the through hole of fixed base, and oviduct is in the connection part of passage and branch road.This is another kind of scheme, and reducer pipe and straight tube are structure as a whole, and so directly straight tube are inserted from through hole; Oviduct just in time is in the intersection of passage and branch road; Airflow passes straight tube and by the ejection of the path mouth of oviduct improves air-flow velocity, improves the negative-pressure adsorption ability of branch road.
As preferably, the axis of passage and through hole is skewed, and the air-flow entry port of through hole is higher than the air-flow ejiction opening of passage.Passage tilts, and is drawn into the effect that impurity in the passage receives gravity by negative pressure, also receives the thrust of air-flow simultaneously, conveniently in passage, sprays.
As preferably, the joint between slit and the branch road is provided with circular groove, and the radial width of circular groove is greater than the width in slit.Circular groove can be used as the collection point of impurity, and impurity gets into through being inhaled into branch road after the circular groove turning from the slit, improves the flowability of impurity.
As preferably, the external diameter of this circular groove is greater than the external diameter of place, slit annulus, and the internal diameter of this circular groove is less than the internal diameter of the annulus at place, slit.
The invention has the beneficial effects as follows: the compressed air stream passage of flowing through makes to produce negative pressure on the branch road that the impurity that gets into from the slit is drawn onto the passage place and with the outlet ejection of air-flow from passage; Under the factor of deadweight and pressure reduction; Impurity just can not invade in the bearing; Simultaneously also prevent the erosion of compressed air stream, prevent that the working environment of bearing from worsening, thereby prolong the working life of rotating shaft bearing; Especially the rotating shaft working environment exists under the situation of mortar, and rotating shaft can be worked with maintaining a long-term stability.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is second kind of structural representation of the present invention;
Fig. 3 is the third structural representation of the present invention;
Among the figure: 1, rotating shaft, 2, bearing, 3, flange, 4, passage, 5, branch road, 6, the slit, 7, fixed base, 8, through hole, 9, circular groove, 10, nozzle, 11, horn mouth, 12, aperture, 13, seal ring, 14, shoulder hole, 15, straight tube, 16, oviduct.
Embodiment
Pass through specific embodiment below, and combine accompanying drawing, do further bright specifically technological scheme of the present invention.
Embodiment 1: a kind of bypass hermetic seal structure (referring to accompanying drawing 1), and the periphery of rotating shaft 1 is equipped with flange 3, leaves slit 6 between the cylindrical of flange and rotating shaft, is connected through bearing 2 between rotating shaft and the flange, and bearings is on fixed base 7.Flange is provided with axial straight passage 4, and this passage and slit parallel, and also is provided with the branch road 5 that is communicated with slit and passage in the flange.Turning point between branch road and the slit is provided with circular groove 9, and the external diameter of circular groove is greater than the external diameter of place, slit annulus, and the internal diameter of circular groove is less than the internal diameter of the annulus at place, slit.Fixed base is provided with through hole 8, and through hole is coaxial with passage.End towards fixed base on passage is provided with shoulder hole 14; Shoulder hole is embedded in the nozzle 10 of the middle band aperture 12 of T shape; Be provided with seal ring 13 between the end face of the bigger diameter end of nozzle and the side of fixed base, the miner diameter end of nozzle is in the position that crosses of passage and branch road.The inlet of nozzle is the horn mouth 11 that diameter reduces gradually, and bell-mouthed bigger diameter end is towards the air-flow approach axis, and the outlet of nozzle is the horn mouth that diameter increases, and bell-mouthed bigger diameter end is towards the air-flow emission direction.Pressurized gas gets into from the inlet of the through hole of fixed base, through the aperture in the middle of the nozzle, from the outlet end ejection of passage.Airflow passes aperture place, flow velocity increases, and on branch road, produces negative pressure.
In the work of rotating shaft high speed rotating; Impurity especially mortar and liquid all can in branch road under the action of negative pressure, enter between rotating shaft and the flange along the slit, and under the multiple action of gravity, centrifugal force and negative pressure in the entering branch road; And be blended in the pressurized gas and spray from channel outlet simultaneously thereupon; So impurity and air can not enter in the bearing, can not corrode bearing, can not squeeze the grease in the bearing yet.
Embodiment 2: a kind of bypass hermetic seal structure (referring to accompanying drawing 2); The periphery of rotating shaft 1 is equipped with flange 3, leaves slit 6 between the cylindrical of flange and rotating shaft, and flange and fixed base 7 fix; Frame has bearing 2 between fixed base and the rotating shaft, and bearing is with the end sealing of slit towards roller end.Flange is provided with axial straight passage 4, and fixed base is provided with through hole 8, and through hole is coaxial with passage, and passage and slit parallel, and also is provided with the branch road 5 that is communicated with slit and passage in the rotating shaft flange.Turning point between branch road and the slit is provided with circular groove 9, and the external diameter of circular groove is greater than the external diameter of place, slit annulus, and the internal diameter of circular groove is less than the internal diameter of the annulus at place, slit.Be inserted with straight tube 15 in the through hole, the end of straight tube is an oviduct 16, and the osculum of oviduct is in the intersection of branch road and passage.Bearing is in the outer end of rotating shaft, and the inlet in slit is towards the medium position of rotating shaft.
In the work of rotating shaft high speed rotating, impurity especially mortar and liquid all can enter between rotating shaft and the flange along the slit, can stop at the circular groove place; Logical pressurized gas in the passage; Owing to be straight passage, directly from the other end ejection of passage, the gas on the branch road has been taken away in the centre to pressurized gas; Thereby make branch road form negative pressure, this negative pressure and centrifugal force and gravity receive impurity in the slit and the impurity in the circular groove and spray simultaneously with pressurized gas.So impurity and air can not enter in the bearing, can not corrode bearing, can not squeeze the grease in the bearing yet.Thereby play the effect of hermetic seal.
Embodiment 3: a kind of bypass hermetic seal structure (referring to accompanying drawing 3); The periphery of rotating shaft 1 is equipped with flange 3, leaves slit 6 between the cylindrical of farad and rotating shaft, and flange fixed base 7 fixes; Frame has bearing 2 between fixed base and the flange, and bearing is with the end sealing of slit towards roller end.Flange is provided with axial straight passage 4, and fixed base is provided with through hole 8, and through hole is coaxial with passage, and passage and slit parallel, and also is provided with the branch road 5 that is communicated with slit and passage in the rotating shaft flange.Turning point between branch road and the slit is provided with circular groove 9, and the external diameter of circular groove is greater than the external diameter of place, slit annulus, and the internal diameter of circular groove is less than the internal diameter of the annulus at place, slit.Be inserted with straight tube 15 in the through hole, the end of straight tube is an oviduct 16, and the osculum of oviduct is in the intersection of branch road and passage.The axis and the slit of passage and through hole tilt, and the inlet of through hole is higher than the outlet of passage.Bearing is in the outer end of rotating shaft, and the inlet in slit is towards the medium position of rotating shaft.
In the work of rotating shaft high speed rotating, impurity especially mortar and liquid all can enter between rotating shaft and the flange along the slit, can stop at the circular groove place; Logical pressurized gas in the passage; Owing to be straight passage, directly from the other end ejection of passage, the gas on the branch road has been taken away in the centre to pressurized gas; Thereby make branch road form negative pressure, this negative pressure is received impurity in the slit and the impurity in the circular groove and spray simultaneously with pressurized gas.Oviduct makes the out-of-date flow velocity of air communication strengthen, thereby improves the effect that negative pressure is received, and impurity is received branch road more thorough from the slit.Also receive the forward active force of air-flow simultaneously, impurity is desirable more from the effect of channel outlet ejection.So impurity and air can not enter in the bearing, can not corrode bearing, can not squeeze the grease in the bearing yet.Play the effect of hermetic seal simultaneously.
Above-described embodiment is several kinds of preferred version of the present invention, is not the present invention is done any pro forma restriction, under the prerequisite that does not exceed the technological scheme that claim puts down in writing, also has other variant and remodeling.
Claims (7)
1. bypass hermetic seal structure; The fixed base (7) that comprises rotating shaft (1), links to each other with rotating shaft through bearing (2) and be fixed on the flange (3) on the fixed base; It is characterized in that flange is provided with the straight passage (4) that axial direction is communicated with flange; Fixed base is provided with the through hole (8) of axial communication passage, and this passage communicates with slit (6) between rotating shaft and the flange through branch road (5), and the intersection with branch road on the passage is provided with reducer pipe; Air-flow gets into from an end of through hole, from the other end ejection of passage.
2. bypass hermetic seal structure according to claim 1; It is characterized in that reducer pipe is middle narrow meshed nozzle, nozzle cross-section is T-shaped, and flange is provided with the shoulder hole coaxial with passage; Nozzle is embedded in the shoulder hole, and the miner diameter end of nozzle is in the position that crosses of passage and branch road.
3. bypass hermetic seal structure according to claim 1 and 2; The inlet that it is characterized in that nozzle is the horn mouth that diameter reduces gradually; Bell-mouthed bigger diameter end is towards the air-flow approach axis, and the outlet of nozzle is the horn mouth that diameter increases, and bell-mouthed bigger diameter end is towards the air-flow emission direction.
4. bypass hermetic seal structure according to claim 1; It is characterized in that reducer pipe is oviduct (16); The bigger diameter end of oviduct is connected with straight tube (15); Miner diameter end is towards the emission direction of air-flow, and straight tube is connected in the through hole of fixed base, and oviduct is in the connection part of passage and branch road.
5. bypass hermetic seal structure according to claim 4, the axis that it is characterized in that passage and through hole is skewed, the air-flow entry port of through hole is higher than the air-flow ejiction opening of passage.
6. according to claim 1 or 2 or 4 or 5 described bypass hermetic seal structures, it is characterized in that the joint between slit and the branch road is provided with circular groove (9), the radial width of circular groove is greater than the width in slit.
7. bypass hermetic seal structure according to claim 6 is characterized in that the external diameter of the external diameter of this circular groove greater than place, slit annulus, and the internal diameter of this circular groove is less than the internal diameter of the annulus at place, slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110382719.2A CN102563084B (en) | 2011-11-25 | 2011-11-25 | Bypass air sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110382719.2A CN102563084B (en) | 2011-11-25 | 2011-11-25 | Bypass air sealing structure |
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| CN102563084A true CN102563084A (en) | 2012-07-11 |
| CN102563084B CN102563084B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110382719.2A Expired - Fee Related CN102563084B (en) | 2011-11-25 | 2011-11-25 | Bypass air sealing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624116A (en) * | 2019-01-04 | 2019-04-16 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Gauze oscillation system and multi-wire saw equipment |
| CN112337637A (en) * | 2019-08-07 | 2021-02-09 | 赣州力信达冶金科技有限公司 | Method for preventing material from being coarse after being pulverized by airflow |
| CN114770777A (en) * | 2022-04-24 | 2022-07-22 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Swing mechanism with air fluid sealing structure and multi-wire cutting machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6267374A (en) * | 1985-09-19 | 1987-03-27 | Mitsubishi Heavy Ind Ltd | Non-contact type shaft sealing device |
| CN201027986Y (en) * | 2007-02-09 | 2008-02-27 | 北京精雕科技有限公司 | Helical seal device at end of electric principal shaft |
| CN101216111A (en) * | 2008-01-04 | 2008-07-09 | 洛阳轴研科技股份有限公司 | Method for implementing bearing hermetic sealing for machining inner screw thread copper pipe |
| CN201090743Y (en) * | 2007-09-01 | 2008-07-23 | 江苏科行环境工程技术有限公司 | Air separator pneumatic sealing device |
| CN201330851Y (en) * | 2008-12-30 | 2009-10-21 | 洛阳轴研科技股份有限公司 | Air sealing structure of electric main shaft |
| CN201394575Y (en) * | 2009-04-27 | 2010-02-03 | 薛建刚 | High speed wire rod rolling mill shaft head position air or oil gas sealing device |
-
2011
- 2011-11-25 CN CN201110382719.2A patent/CN102563084B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6267374A (en) * | 1985-09-19 | 1987-03-27 | Mitsubishi Heavy Ind Ltd | Non-contact type shaft sealing device |
| CN201027986Y (en) * | 2007-02-09 | 2008-02-27 | 北京精雕科技有限公司 | Helical seal device at end of electric principal shaft |
| CN201090743Y (en) * | 2007-09-01 | 2008-07-23 | 江苏科行环境工程技术有限公司 | Air separator pneumatic sealing device |
| CN101216111A (en) * | 2008-01-04 | 2008-07-09 | 洛阳轴研科技股份有限公司 | Method for implementing bearing hermetic sealing for machining inner screw thread copper pipe |
| CN201330851Y (en) * | 2008-12-30 | 2009-10-21 | 洛阳轴研科技股份有限公司 | Air sealing structure of electric main shaft |
| CN201394575Y (en) * | 2009-04-27 | 2010-02-03 | 薛建刚 | High speed wire rod rolling mill shaft head position air or oil gas sealing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109624116A (en) * | 2019-01-04 | 2019-04-16 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Gauze oscillation system and multi-wire saw equipment |
| CN112337637A (en) * | 2019-08-07 | 2021-02-09 | 赣州力信达冶金科技有限公司 | Method for preventing material from being coarse after being pulverized by airflow |
| CN114770777A (en) * | 2022-04-24 | 2022-07-22 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Swing mechanism with air fluid sealing structure and multi-wire cutting machine |
| CN114770777B (en) * | 2022-04-24 | 2024-04-09 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Swing mechanism with gas fluid sealing structure and multi-wire saw |
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