CN109237045A - A kind of rotary shaft air curtain generates unit, gas sealing mechanism and its processing method - Google Patents
A kind of rotary shaft air curtain generates unit, gas sealing mechanism and its processing method Download PDFInfo
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- CN109237045A CN109237045A CN201811292303.XA CN201811292303A CN109237045A CN 109237045 A CN109237045 A CN 109237045A CN 201811292303 A CN201811292303 A CN 201811292303A CN 109237045 A CN109237045 A CN 109237045A
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- air
- rotary shaft
- guide face
- positioning mechanism
- air curtain
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- 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
Abstract
The invention discloses a kind of rotary shaft air curtains to generate unit, gas sealing mechanism and its processing method, belongs to the technical field of sealing technology of rotating mechanism end cap.The present invention includes axial positioning mechanism, which is the ring structure with concentric rotation axis, and the air supply unit that above-mentioned air curtain generates unit and is attached thereto is provided in axial positioning mechanism；It includes guide face and current limliting face that air curtain, which generates unit, and the air curtain that guide face and current limliting face constitute all round closure both ends open generates unit, and guide face is used to that outlet side air-flow to be guided to spray towards the non-tight end of rotary shaft.Air-flow of the invention enters air curtain by inlet end and generates unit, and air-flow flows to outlet side by inlet end under the guiding function of guide face, and air-flow sprays towards the non-tight end of rotary shaft, avoids air and particulate matter from entering in rotary shaft, improve hermetic seal effect.
Description
Present patent application is for application No. is 2017101765790 divisional applications, the applyings date of original application are as follows:
2017-03-23, invention and created name are as follows: a kind of the air curtain generation unit and rotary shaft gas sealing mechanism of hermetic seal.
Technical field
The present invention relates to the technical field of sealing technology of rotating mechanism and fixed end cap, more specifically to a kind of hermetic seal
Air curtain generate unit and rotary shaft gas sealing mechanism.
Background technique
Machine tool chief axis is connected by bearing with machine tool main body, so as to rotate main shaft relative to shell.In the machine of using
Tool or workpiece are usually installed on the top of main shaft by bed during processing to workpiece, started motor and driven by main shaft
The tool or Work piece high-speed on top rotate, to be cut, be ground, the processing such as milling.It is to prevent during mach
It killed between workpiece to be machined and cutter, improve finished surface precision, often by coolant liquid or cut during work pieces process
It cuts liquid etc. and is injected in tool, on workpiece.But since main shaft relative to shell is the motion state in relative rotation, high speed
There is gaps between the machine tool chief axis and housing end plug of rotation.Therefore, the coolant liquid in machining process, clast etc. easily pass through
Gap between shell and main shaft enters in bearing, causes bearing seizure, and causes a series of production accident.
To prevent coolant liquid and clast from entering, common encapsulating method has: labyrinth seal, rubber seal etc..But it is existing
Sealing technique there are following technical problems: 1) in cutting process, since coolant liquid jet velocity is fast, grain diameter is small, labyrinth
The effect of formula sealing is poor, and coolant liquid can not be stopped to carry small chip particles secretly completely and entered, main shaft, bearing and other zero are caused
Component is worn.2) rubber seal be contact sealing, although sealing effect is preferable, rubber easily with high-speed rotating main shaft
It rubs, to cause main shaft temperature excessively high and thermal deformation occurs, and causes spindle rotation accuracy to reduce, service life decline, into
And the use and processing performance of lathe are influenced, reduce the reliability of machine tooling.
Through retrieving, there is related art scheme to disclose.Air-tight structure design method such as electric main shaft of oil grease mill is (special
Benefit number: ZL200810237316.7, the day for announcing: 2011.07.27), the gas sealing mechanism (patent of hydrogenerator additionaling power
Number: ZL201320463129.7, the day for announcing: 2013.12.25), propose the method for hermetic seal, but the gas in the technical solution
Sealing effect is poor, and the air of hermetic seal needs sufficiently drying, and the moisture in gas is not so easily caused to enter bearing and main shaft
In, to influence its service life of bearing.
In addition, the title of innovation and creation are as follows: a kind of mixing machine main shaft shaft end seal device (application number:
201210130775.1 date of publication: 2013.10.30) and machine tool chief axis forward end seal device (patent No.:
ZL201420353044.8, the day for announcing: 2014.12.24), using multi-sealed protection, significantly improve sealing performance；But its
Structure is complicated, needs two sealing systems, so that sealing higher cost.Therefore, it needs to develop suitable for high-speed rotary main shaft
Sealing device, to improve the service life of main shaft and the machining accuracy of workpiece.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome the sealing effect of high-speed rotary main shaft in the prior art poor, provide a kind of airtight
The air curtain of envelope generates unit and rotary shaft gas sealing mechanism；
A kind of air curtain of the hermetic seal wherein provided generates unit, guides outlet side air-flow towards rotary shaft by guide face
Non-tight end injection, can enter in rotary shaft to avoid air and particulate matter, and then the effect of hermetic seal can be improved；Into one
Step ground, the sectional area of outlet side is greater than in conjunction with the sectional area of inlet end, the gentle sealing effect of outlet side production well capacity can be improved；
A kind of rotary shaft gas sealing mechanism wherein provided is provided with air curtain in axial positioning mechanism and generates unit and therewith
Connected air supply unit can enter in rotary shaft to avoid air and particulate matter, and then the effect of hermetic seal can be improved；Into one
Step ground is greater than the sectional area of air curtain generation unit inlet end in conjunction with the sectional area of annular air supply channel, hermetic seal can be improved
The gentle sealing effect of production well capacity；
A kind of processing method of the rotary shaft gas sealing mechanism wherein provided, cuts out radial ditch on axial positioning mechanism
Cover board is fixed on axial positioning mechanism by slot by fixing screws, is constituted air curtain with radial groove on the inside of cover board and is generated unit；
The cambered surface radius of the positioning mechanism intrados of axial positioning mechanism is R1, and the cambered surface radius of the cover board intrados of cover board is R2, then
R2 > R1, can enter in rotary shaft to avoid air and particulate matter, and then the effect of hermetic seal can be improved.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of air curtain of hermetic seal of the invention generates unit, including guide face and current limliting face, the guide face and limit
The air curtain that stream interface constitutes all round closure both ends open generates unit, and both ends of them are inlet end and outlet side, the guide face
For guiding outlet side air-flow to spray towards the non-tight end of rotary shaft, and the angle of jet-impingement direction and center of rotation is sharp
Angle.
Further, the guide face is inclined-plane or cambered surface, the point and non-tight end end on guide face away from
From being increasing function about a, wherein a is point on guide face at a distance from center of rotation.
Further, guide face extends to the axis periphery edge of rotary shaft by outlet side.
Further, when guide face is inclined-plane, the angle of guide face and center of rotation is α, and the range of α is 15-
75°；It or is α, the model of α positioned at the guide face end tangent line of outlet side and the angle of center of rotation when guide face is cambered surface
Enclose is 15-75 °.
Further, the minimum range L1 of guide face and axis periphery is less than the minimum range in current limliting face and axis periphery
L2。
Further, the sectional area of inlet end is greater than the sectional area of outlet side.
A kind of rotary shaft gas sealing mechanism of the invention, including axial positioning mechanism, the axial positioning mechanism be and rotation
The coaxial ring structure of axis；The gas supply list that above-mentioned air curtain generates unit and is attached thereto is provided in the axial positioning mechanism
Member.
Further, the air supply unit includes: main air supply channel, outside the main air supply channel and axial positioning mechanism
Portion is connected, and is used to provide channel for the air-flow of hermetic seal；Annular air supply channel, the annular air supply channel by main for supplying
The air-flow in channel supplies to air curtain and generates unit, and the sectional area of annular air supply channel is greater than air curtain and generates cutting for unit inlet end
Area.
Further, ring-shaped groove and radial groove are offered on the axial positioning mechanism, radial groove is by ring
Shape groove extends to positioning mechanism intrados, and cover board, cover board inside and annular ditch are equipped on the outside of the end face of axial positioning mechanism
Slot constitutes annular air supply channel, constitutes air curtain with radial groove on the inside of cover board and generates unit.
Further, it is uniformly disposed with 8-16 air curtain on the axial positioning mechanism and generates unit；The ring
The air inlet of shape air supply channel is connected with main air supply channel, the inlet end of the gas outlet of annular air supply channel and air curtain generation unit
It is connected, the gas outlet that air curtain generates unit and annular air supply channel is correspondingly arranged.
A kind of processing method of rotary shaft gas sealing mechanism of the invention, comprising the following steps:
Radial groove is cut out on axial positioning mechanism, the radial groove is by extending to axially position machine on the inside of ring-shaped groove
The positioning mechanism intrados of structure；Cover board is fixed on axial positioning mechanism by fixing screws, cover board inside and radial groove
It constitutes air curtain and generates unit；The cambered surface radius of the positioning mechanism intrados of axial positioning mechanism is R1, the cover board intrados of cover board
Cambered surface radius be R2, then R2 > R1, obtains rotary shaft gas sealing mechanism.
Further, the depth of radial groove is gradually become shallower as by radial groove to positioning mechanism intrados, so that air inlet
The sectional area at end is greater than the sectional area of outlet side.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
(1) a kind of air curtain of hermetic seal of the invention generates unit, and guide face and current limliting face constitute all round closure both ends
The air curtain of opening generates unit, and guide face is used to that outlet side air-flow to be guided to spray towards the non-tight end of rotary shaft, and air-flow sprays
The angle for penetrating direction and center of rotation is acute angle, improves the sealing effect that air curtain generates unit；
(2) a kind of air curtain of hermetic seal of the invention generates unit, the vertical interval of cover board medial surface bottom and guide face
For 0.5-1.0mm, appropriate gas thickness ensure that, while guaranteeing that there is preferable sealing effect, avoid gas and flow into quilt
Sealed end, while reducing the dosage of air-flow；
(3) a kind of air curtain of hermetic seal of the invention generates unit, and the sectional area of inlet end is greater than the sectional area of outlet side,
The injection pressure and injection intensity of inlet end gas are increased, and then improves sealing effect, and by inlet end to outlet side gas
Curtain generates the continuous subtraction function of cross-sectional area of unit, reduces gas in air curtain and generates the power loss in unit, improves
Sealing effect；
(4) a kind of air curtain of hermetic seal of the invention generates unit, and the minimum range L1 of guide face and axis periphery is less than
The minimum range L2 in current limliting face and axis periphery, i.e. L1 < L2, wherein the range of L1 is 0.01-0.05mm, so that guide face
The spacing of bottom margin position and axis periphery is less than the bottom margin position in current limliting face and the spacing of axis periphery, i.e., compared to limit
The bottom margin position of stream interface, the bottom margin of guide face more close to axis periphery, cooperate guide face to prolong by outlet side
Extend to the axis periphery edge of rotary shaft, the bottom margin of appropriate tilt angle and guide face reduces closer to axis periphery
Air-flow improves sealing effect to a possibility that flowing by sealed end；
(5) a kind of rotary shaft gas sealing mechanism of the invention, be provided in axial positioning mechanism above-mentioned air curtain generate it is single
Member and the air supply unit being attached thereto, air supply unit generate unit for air curtain and provide sealing air-flow, and air-flow enters gas by inlet end
Curtain generates unit, and air-flow flows to outlet side by inlet end under the guiding function of guide face, and sprays injection gas by outlet side
Stream, air-flow are sprayed towards the non-tight end of rotary shaft, avoid air and particulate matter from entering in rotary shaft, and then can be improved airtight
The effect of envelope；
(6) a kind of rotary shaft gas sealing mechanism of the invention, the geometric center of ring-shaped groove and the axle center of rotary shaft are coaxial,
And the ring-shaped groove of closure is formed, gas is riddled in ring-shaped groove, and provide gas for radial groove, provides
The gas shield pressure of even hermetic seal；
(7) a kind of rotary shaft gas sealing mechanism of the invention, the sectional area of annular air supply channel are greater than air curtain and generate unit
The sectional area of inlet end enables annular air supply channel to generate unit for air curtain and provides enough gas, and air-flow is supplied by annular
During gas channel enters air curtain generation unit, increases as cross-sectional area shrinks jet-impingement pressure, improve hermetic seal
The sealing effect of device.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the invention；
Fig. 2 is schematic perspective view of the invention；
Fig. 3 is side structure schematic diagram of the invention；
Fig. 4 is a kind of assembling schematic diagram of rotary shaft gas sealing mechanism of the invention in shaft end；
Fig. 5 is the structural schematic diagram that guide face of the invention is cambered surface.
Label declaration in schematic diagram:
110, air curtain generates unit；111, inlet end；112, outlet side；113, guide face；114, current limliting face；120, it supplies
Unit；121, main air supply channel；122, annular air supply channel；
210, axial positioning mechanism；211, positioning mechanism intrados；220, cover board；221, cover board intrados；
300, rotary shaft；301, by sealed end；302, non-tight end；310, axis periphery；320, center of rotation.
Specific embodiment
Hereafter to the detailed description of exemplary embodiment of the present invention with reference to attached drawing, which forms one of description
Point, it has been shown as example enforceable exemplary embodiment of the invention in the figure.Although these exemplary embodiment quilts
Sufficiently describe in detail so that those skilled in the art can implement the present invention, it is to be understood that can realize other embodiments and
Can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to the embodiment of the present invention
More detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair
The description of the features of the present invention and feature to propose to execute best mode of the invention, and is sufficient to make those skilled in the art
It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing, wherein of the invention
Element and feature are identified by appended drawing reference.
Embodiment 1
In conjunction with shown in Fig. 1,2 and 3, a kind of air curtain of hermetic seal of the present embodiment generates unit, including guide face 113 and limit
The air curtain that stream interface 114, the guide face 113 and current limliting face 114 constitute all round closure both ends open generates unit 110, wherein
Both ends are inlet end 111 and outlet side 112, and the guide face 113 is for guiding 112 air-flow of outlet side towards rotary shaft 300
Non-tight end 302 spray, air-flow by inlet end 111 flow into air curtain generate unit 110, and under the guidance of guide face 113 by
(as shown in Figure 1) is flowed out in outlet side 112, it is worth noting that, outlet side 112 is by 114 bottom of 113 bottom end of guide face and current limliting face
End collectively forms, and the outlet of outlet side 112 is with a thickness of 0.5-1mm (as shown in Figure 1), the present embodiment preferred 0.8mm, described
The vertical interval of 220 medial surface bottom of outlet thickness, that is, cover board and guide face 113 is 0.5-1.0mm, preferably 0.8mm.To protect
Appropriate gas thickness has been demonstrate,proved, blanket gas is avoided to flow through big and excessive gas stream is made to also avoid air-flow thickness by sealed end 301
It spends smaller and keeps air seal intensity inadequate, reduce sealing effect, the outlet thickness of the present embodiment is guaranteeing with preferably close
While sealing effect, avoids gas and flow by sealed end 301, while reducing the dosage of air-flow, there is progress outstanding.
The guide face 113 of the present embodiment is continuous inclined-plane (as shown in Figure 1), i.e. guide face 113 is not cascaded surface, and by
Inlet end 111 is to outlet side 112, and the point on guide face 113 is gradually reduced at a distance from center of rotation 320, and guide face 113 is by quilt
Sealed end 301 is tilted to non-tight end 302.It may be otherwise such description: point and 302 end of non-tight end on guide face 113
The distance in portion is the increasing function about a, wherein a be guide face 113 on point and center of rotation 320 vertical range, i.e., by into
Gas end 111 to outlet side 112, as the point on guide face 113 is gradually reduced at a distance from center of rotation 320, the point with it is non-close
The distance of sealing end 302 is also gradually reduced.
Air-flow is sprayed along guide face 113 towards the non-tight end 302 of rotary shaft 300, and jet-impingement direction and rotation
The angle in axle center 320 is acute angle；So that the air-flow ejected by outlet side 112 had both been not orthogonal to the axis periphery of rotary shaft 300
310, also it is not parallel to the axis periphery 310 of rotary shaft 300.If the injection direction of air-flow is made perpendicular to axis periphery 310
After air-flow and 310 vertical direction toward impact of axis periphery, fraction is flowed to by sealed end 301, so that the air-flow stream for sealing
It moves to air curtain generation unit 110 by sealed end 301, thereby reduces sealing effect；If the injection direction of air-flow is parallel to
Axis periphery 310 then makes air-flow poor to the surface layer impact effect of axis periphery 310, causes the sealing to axis periphery 310
Effect is poor.
For the above technical issues, those skilled in the art not yet effectively pays close attention to, and the applicant of this patent is logical
Prolonged exploration is crossed, the creative air-flow that proposes is sprayed along guide face 113 towards the non-tight end 302 of rotary shaft 300,
And the angle of jet-impingement direction and center of rotation 320 is acute angle, and when guide face 113 is inclined-plane, guide face 113 and center of rotation
320 angle is α, and the range of α is 15-75 °, preferred α=30 ° of this implementation (as shown in Figure 1), and then improves air curtain and generate list
The sealing effect of member 110.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: the guide face 113 be cambered surface, and by into
Gas end 111 to outlet side 112, the point on guide face 113 are gradually reduced (as shown in Figure 5) at a distance from center of rotation 320, herein
Can also so describe: the point on guide face 113 is the increasing function about a at a distance from 302 end of non-tight end, and wherein a is
The vertical range (as shown in Figure 5) of point on guide face 113 and center of rotation 320, i.e., by inlet end 111 to outlet side 112, with
Point on guide face 113 be gradually reduced at a distance from center of rotation 320, which also gradually subtracts at a distance from non-tight end 302
It is small.It is worth further illustrating, which is towards by the cambered surface of 301 protrusion of sealed end.When guide face 113 is cambered surface, position
It is α in the 113 end tangent line of guide face of outlet side 112 and the angle of center of rotation 320, the range of α is 15-75 °, this implementation is excellent
Select α=75 ° (as shown in Figure 5).
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that: guide face 113 is extended to by outlet side 112
310 edge of axis periphery of rotary shaft 300.The minimum range L1 of guide face 113 and axis periphery 310 be less than current limliting face 114 with
The minimum range L2 of axis periphery 310, i.e. L1 < L2, wherein the range of L1 is 0.01-0.05mm, and the present embodiment is preferred
The range of 0.02mm, L2 are 0.50-1.00mm, the preferred 0.60mm of the present embodiment.So that the bottom margin position of guide face 113
The spacing for setting the bottom margin position and axis periphery 310 that are less than current limliting face 114 with the spacing of axis periphery 310, i.e., compared to limit
The bottom margin position of stream interface 114, the bottom margin of guide face 113 is more close to axis periphery 310.
The design of the creativeness reduces blanket gas flow direction by 301 circulation passage of sealed end, and guide face 113 is cooperated to pass through
Outlet side 112 extends to 310 edge of axis periphery of rotary shaft 300, when guide face 113 is inclined-plane, guide face 113 and rotation axis
The angle of the heart 320 is α, and α is 45 ° -75 °, preferred α=60 ° of the present embodiment, the bottom of appropriate tilt angle and guide face 113
Edge reduces a possibility that air-flow is to by the flowing of sealed end 301, to improve close closer to the design of axis periphery 310
Seal effect.
On the other hand, 112 high pressure draught of outlet side and axis periphery 310 collide, and may will form gas during collision
Body eddy flow, the bottom margin of guide face 113 more close to axis periphery 310, avoid air-flow during sealing in outlet
The possible formation gas cyclone in 112 outlet positions is held, and then avoids sealing air-flow and flows by sealed end 301.
Embodiment 4
The basic content of the present embodiment with embodiment 1, the difference is that: the sectional area of inlet end 111 be greater than outlet side
112 sectional area to increase the injection pressure and injection intensity of 111 gas of inlet end, and then improves sealing effect.And
By inlet end 111 to outlet side 112, air curtain generates the continuous subtraction function of cross-sectional area of unit 110, and continuous subtraction function makes
The area for obtaining cross section will not mutate, and generate the power loss in unit 110, Jin Erke in air curtain to reduce gas
To improve sealing effect.When guide face 113 is inclined-plane, the angle of guide face 113 and center of rotation 320 is α, and the range of α is 15-
75 °, preferred α=15 ° of this implementation
Embodiment 5
In conjunction with shown in Fig. 1,2,3 and 4, a kind of rotary shaft gas sealing mechanism of the invention, including axial positioning mechanism 210,
The axial positioning mechanism 210 is the ring structure coaxial with rotary shaft 300, and the axial positioning mechanism 210 can be bearing
End cap or sealing fixing seat, bearing (as shown in Figure 4) can be set on the inside of end cap；In the axial positioning mechanism 210
It is provided with the air supply unit 120 that above-mentioned air curtain generates unit 110 and is attached thereto, which is that air curtain generates list
Member 110 provides sealing air-flow, and air-flow enters air curtain by inlet end 111 and generates unit 110, and air-flow is made in the guidance of guide face 113
Outlet side 112 is flowed to by inlet end 111 under, and by 112 injection air-flow of outlet side, air-flow is non-towards rotary shaft 300
Sealed end 302 sprays.8-16 (as shown in Figure 3) are uniformly disposed on the circumference of axial positioning mechanism 210, the present embodiment is excellent
12 air curtains are selected to generate unit 110, air curtain, which generates unit 110, uniformly to provide gas to axle center, realize hermetic seal.
The air supply unit 120 of the present embodiment includes main air supply channel 121 and annular air supply channel 122, wherein main gas supply is logical
It is connected outside road 121 and axial positioning mechanism 210, is used to provide channel for the air-flow of hermetic seal；Annular air supply channel 122
Unit 110 is generated for supplying the air-flow of main air supply channel 121 to air curtain, and the sectional area of annular air supply channel 122 is greater than
Air curtain generates the sectional area of 110 inlet end 111 of unit, mentions so that annular air supply channel 122 can generate unit 110 for air curtain
For enough gas, and air-flow is during entering air curtain by annular air supply channel 122 and generating unit 110, with cross section
Product is shunk, and jet-impingement pressure increases, to improve the sealing effect of gas sealing mechanism.
During hermetic seal, if sealing parallel current causes air-flow to axis periphery 310 in axis periphery 310
Sealed pressure it is inadequate, and make coolant liquid or cutting fluid or other granule foreigns along axis periphery 310 enter by sealed end
301, and then its sealing effect is influenced, it is described to refer to that rotary shaft 300 is installed on the portion of axle sleeve or protection cap by sealed end 301
Point.If air-flow makes air-flow strike the surface of axis periphery 310, in turn perpendicular to the axis periphery 310 of rotary shaft 300
So that fraction enters by sealed end 301, but since the high pressure gas dehumidifying for sealing is not thorough, wet pressure-air
Liquid can be generated inside main shaft after main shaft can be entered, these liquid once enter main shaft bearing, will lead to main shaft damage, seriously
Influence service life.The jet-impingement direction of the present embodiment and the angle of center of rotation 320 are acute angle, the angle in the present embodiment
It is 75 °, so that the air-flow ejected by outlet side 112 had both been not orthogonal to the axis periphery 310 of rotary shaft 300, is also not parallel to
The axis periphery 310 of rotary shaft 300.To realize while guaranteeing sealing effect, so that sealing air-flow does not enter rotation yet
Axis 300 by sealed end 301.
At the same time, it is less than current limliting face 114 and axis circumference in conjunction with the minimum range L1 of guide face 113 and axis periphery 310
The minimum range L2 in face 310, i.e. L1 < L2 (as shown in Figure 1), wherein the range of L1 is 0.01-0.05mm, and the present embodiment is preferred
The range of 0.05mm, L2 are 0.50-1.00mm, the preferred 0.80mm of the present embodiment.So that the bottom margin position of guide face 113
Set the spacing of the bottom margin position and axis periphery 310 that are less than current limliting face 114 with the spacing of axis periphery 310, guide face 113
Bottom margin more close to axis periphery 310.The design of the creativeness reduces blanket gas flow direction and is circulated by sealed end 301
Channel, and cooperate the bottom margin of appropriate tilt angle and guide face 113 closer to the design of axis periphery 310, it reduces
Air-flow improves sealing effect to a possibility that flowing by sealed end 301.
Embodiment 6
The basic content of the present embodiment with embodiment 5, the difference is that: offer annular on axial positioning mechanism 210
Groove and radial groove, the geometric center of the ring-shaped groove and the center of rotation 320 of rotary shaft 300 are coaxial (as shown in Figure 3), when
So the ring-shaped groove can be can also being formed the ring-shaped groove of closure with polygon, main purpose, be made of circular ring shape
Obtaining gas can riddle in ring-shaped groove, and provide gas for radial groove, to avoid the different location in ring-shaped groove
Different supply gas pressures is formed, the gas shield pressure of uniform hermetic seal is provided.The cross-sectional area of the ring-shaped groove is greater than diameter
To the cross-sectional area of the close ring-shaped groove of groove, i.e. the cross-sectional area of ring-shaped groove is greater than the inlet end that air curtain generates unit 110
111 sectional area so that can store enough gas in ring-shaped groove, and improves the effect of air seal.
The radial groove of the present embodiment extends to positioning mechanism intrados 211 by ring-shaped groove, axial positioning mechanism 210
Cover board 220 is installed on the outside of end face, cover board 220 is fixed on axial positioning mechanism 210 by screw；220 inside of cover board and ring
Shape groove constitutes annular air supply channel 122, and 220 inside of cover board constitutes air curtain with radial groove and generates unit 110, cover board 220
Medial surface is current limliting face 114, and the air curtain that guide face 113 and current limliting face 114 constitute all round closure both ends open generates unit
110.8-16 are uniformly disposed on the circumference of axial positioning mechanism 210, the present embodiment preferably 16 air curtains generate unit
110, to provide uniform sealing air-flow for hermetic seal.
The radial groove opened up on axial positioning mechanism 210, the inclined-plane of radial groove are guide face 113, the 2 of radial groove
A slot side is limited stream interface 114, medial surface at the same time be also limited 114,3 current limliting faces 114 of stream interface and guide face 113 it is common
It constitutes air curtain and generates unit 110 (as shown in Figure 2), the minimum range L1 of guide face 113 and axis periphery 310 is less than current limliting face
114 with minimum range L2, i.e. the L1 < L2 of axis periphery 310, wherein the range of L1 is 0.01-0.05mm, i.e. radial groove
Bottom is L1, the preferred 0.01mm of the present embodiment at a distance from axis periphery 310；The range of L2 is 0.50-1.00mm, i.e. cover board
220 bottoms are L2, the preferred 0.50mm of the present embodiment at a distance from axis periphery 310.Herein, L1 and L2 it is also possible that description,
I.e. the cambered surface radius of the positioning mechanism intrados 211 of axial positioning mechanism 210 is R1, and the radius of rotary shaft 300 is R0, then can be with
Indicate L1=R1-R0；The cambered surface radius of the cover board intrados 221 of cover board 220 is R2, then can indicate L2=R2-R0.
This embodiment reduces blanket gas flow directions by 301 circulation passage of sealed end, and cooperates appropriate tilt angle and lead
The bottom margin of stream interface 113 reduces a possibility that air-flow is to by the flowing of sealed end 301 closer to the design of axis periphery 310,
To improve the sealing effect of hermetic seal.
Embodiment 7
The basic content of the present embodiment with embodiment 5, the difference is that: on the circumference of axial positioning mechanism 210 uniformly
Be disposed with 8-16, the present embodiment preferably 8 air curtains generate units 110；The air inlet of the annular air supply channel 122 with
Main air supply channel 121 is connected, and the gas outlet of annular air supply channel 122 is connected with the inlet end 111 that air curtain generates unit 110, gas
Curtain generates unit 110 and the gas outlet of annular air supply channel 122 is correspondingly arranged.
Embodiment 8
A kind of processing method of rotary shaft gas sealing mechanism of the invention, the specific steps are as follows:
S1, axial positioning mechanism 210 is fixed on lathe, and is got on the bus with lathe tool in axial positioning mechanism 210 and cuts out ring
Shape groove, the geometric center of the ring-shaped groove and the center of rotation 320 of rotary shaft 300 are coaxial；
S2, radial groove is cut out on axial positioning mechanism 210, the radial groove is by extending to axial direction on the inside of ring-shaped groove
The positioning mechanism intrados 211 of positioning mechanism 210, and the depth of radial groove is by radial groove to positioning mechanism intrados 211
It gradually becomes shallower as, so that the sectional area of inlet end 111 is greater than the sectional area of outlet side 112；
S3, the periphery of ring-shaped groove opens up main air supply channel 121 on axial positioning mechanism 210, and the main gas supply is logical
Road 121 extends to ring-shaped groove by 210 extrados of axial positioning mechanism, and is connected to ring-shaped groove；
S4, cover board 220 is fixed on axial positioning mechanism 210 by fixing screws, 220 inside of cover board and ring-shaped groove
Annular air supply channel 122 is constituted, 220 inside of cover board constitutes air curtain with radial groove and generates unit 110；Axial positioning mechanism 210
The cambered surface radius of positioning mechanism intrados 211 be R1, the cambered surface radius of the cover board intrados 221 of cover board 220 is R2, then R2 >
R1；So that the minimum range L1 of guide face 113 and axis periphery 310 is less than current limliting face 114 and axis periphery 310 most
Small distance L2；And it processes and obtains the rotary shaft gas sealing mechanism of above-described embodiment.
The air supply unit 120 that above-mentioned air curtain generates unit 110 and is attached thereto is provided in axial positioning mechanism 210,
The air supply unit 120 is that air curtain generation unit 110 provides sealing air-flow, and air-flow enters air curtain by inlet end 111 and generates unit
110, air-flow flows to outlet side 112 by inlet end 111 under the guiding function of guide face 113, and by 112 injection of outlet side
Air-flow, air-flow are sprayed towards the non-tight end 302 of rotary shaft 300；Air curtain, which generates unit 110, uniformly to provide gas to axle center
Body realizes hermetic seal.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited to
These embodiments, but modified, the omission, example that can be appreciated that including those skilled in the art according to the detailed description of front
Any and whole embodiments of combination, adaptive change and/or replacement between such as each embodiment.Restriction in claim
The language according to used in claim and widely explained, and be not limited in foregoing detailed description or implement should
The example described during application, these examples should be considered as nonexcludability.For example, in the present invention, term " preferably "
Be not it is exclusive, here it means that " preferably, but be not restricted to that ".It is in office where to arrange in method or process claims
Any step lifted can execute in any order and be not limited to the sequence proposed in claim.Therefore, model of the invention
Enclosing only to be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai really
It is fixed.
Claims (10)
1. a kind of air curtain of hermetic seal generates unit, it is characterised in that: described including guide face (113) and current limliting face (114)
The air curtain that guide face (113) and current limliting face (114) constitute all round closure both ends open generates unit (110), both ends of them be into
Gas end (111) and outlet side (112), the guide face (113) is for guiding outlet side (112) air-flow towards rotary shaft
(300) non-tight end (302) injection；Guide face (113) and the minimum range L1 of axis periphery (310) are less than current limliting face
(114) with the minimum range L2 of axis periphery (310).
2. a kind of air curtain of hermetic seal according to claim 1 generates unit, it is characterised in that: the guide face
It (113) is inclined-plane or cambered surface.
3. a kind of air curtain of hermetic seal according to claim 1 generates unit, it is characterised in that:
Guide face (113) is inclined-plane, and the angle of guide face (113) and center of rotation (320) is α, and the range of α is 15-75 °；
Or guide face (113) is cambered surface, is located at guide face (113) end tangent line and center of rotation (320) of outlet side (112)
Angle be α, the range of α is 15-75 °.
4. a kind of air curtain of hermetic seal according to claim 1 generates unit, it is characterised in that: guide face (113) passes through
Outlet side (112) extends to axis periphery (310) edge of rotary shaft (300).
5. a kind of air curtain of hermetic seal according to claim 1-4 generates unit, it is characterised in that: inlet end
(111) sectional area is greater than the sectional area of outlet side (112).
6. a kind of rotary shaft gas sealing mechanism, it is characterised in that: including axial positioning mechanism (210), the axial positioning mechanism
It (210) is the ring structure coaxial with rotary shaft (300)；It is arranged in the axial positioning mechanism (210) just like claim 1-5
The air supply unit (120) that described in any item air curtains generate unit (110) and are attached thereto.
7. a kind of rotary shaft gas sealing mechanism according to claim 6, it is characterised in that: the air supply unit (120)
Include:
It is connected outside main air supply channel (121), the main air supply channel (121) and axial positioning mechanism (210), is used for as gas
The air-flow of sealing provides channel；
Annular air supply channel (122), the annular air supply channel (122) is for supplying the air-flow of main air supply channel (121) to gas
Curtain generates unit (110), and the sectional area of annular air supply channel (122) is greater than air curtain and generates unit (110) inlet end (111)
Sectional area.
8. a kind of rotary shaft gas sealing mechanism according to claim 6, it is characterised in that: the axial positioning mechanism
(210) ring-shaped groove and radial groove are offered on, radial groove extends to positioning mechanism intrados (211) by ring-shaped groove,
It is equipped with cover board (220) on the outside of the end face of axial positioning mechanism (210), constitutes annular with ring-shaped groove on the inside of cover board (220) and supply
Gas channel (122), cover board (220) inside constitute air curtain with radial groove and generate unit (110).
9. a kind of processing method of rotary shaft gas sealing mechanism, it is characterised in that: the following steps are included:
Radial groove is cut out on axial positioning mechanism (210), the radial groove is by extending to axially position on the inside of ring-shaped groove
The positioning mechanism intrados (211) of mechanism (210)；
Cover board (220) is fixed on axial positioning mechanism (210) by fixing screws, cover board (220) inside and radial groove
It constitutes air curtain and generates unit (110)；The cambered surface radius of the positioning mechanism intrados (211) of axial positioning mechanism (210) is R1, lid
The cambered surface radius of the cover board intrados (221) of plate (220) is R2, then R2 > R1, obtains rotary shaft gas sealing mechanism.
10. a kind of processing method of rotary shaft gas sealing mechanism according to claim 9, it is characterised in that: radial groove
Depth gradually become shallower as by radial groove to positioning mechanism intrados (211) so that the sectional area of inlet end (111) be greater than outlet
Hold the sectional area of (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811292303.XA CN109237045B (en) | 2017-03-23 | 2017-03-23 | Rotating shaft air curtain generating unit, air sealing device and machining method of air curtain generating unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176579.0A CN106763797B (en) | 2017-03-23 | 2017-03-23 | A kind of the air curtain generation unit and rotary shaft gas sealing mechanism of hermetic seal |
| CN201811292303.XA CN109237045B (en) | 2017-03-23 | 2017-03-23 | Rotating shaft air curtain generating unit, air sealing device and machining method of air curtain generating unit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176579.0A Division CN106763797B (en) | 2017-03-23 | 2017-03-23 | A kind of the air curtain generation unit and rotary shaft gas sealing mechanism of hermetic seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109237045A true CN109237045A (en) | 2019-01-18 |
| CN109237045B CN109237045B (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811292303.XA Active CN109237045B (en) | 2017-03-23 | 2017-03-23 | Rotating shaft air curtain generating unit, air sealing device and machining method of air curtain generating unit |
| CN201710176579.0A Active CN106763797B (en) | 2017-03-23 | 2017-03-23 | A kind of the air curtain generation unit and rotary shaft gas sealing mechanism of hermetic seal |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176579.0A Active CN106763797B (en) | 2017-03-23 | 2017-03-23 | A kind of the air curtain generation unit and rotary shaft gas sealing mechanism of hermetic seal |
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| CN (2) | CN109237045B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827720A (en) * | 2019-04-02 | 2019-05-31 | 深圳市顺源精密机械有限公司 | A kind of air curtain test device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188416B (en) * | 2017-12-13 | 2019-08-09 | 广州市昊志机电股份有限公司 | A kind of high leakproofness direct-connected main shaft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2622494Y (en) * | 2003-06-06 | 2004-06-30 | 彭建 | Dry air seal friction pair |
| CN101478190A (en) * | 2008-12-30 | 2009-07-08 | 洛阳轴研科技股份有限公司 | Air sealing construct design for electric main shaft of oil grease mill |
| CN201554860U (en) * | 2009-12-17 | 2010-08-18 | 北京蓝爱迪电力技术有限公司 | Gas seal type oil stop device |
| CN202149222U (en) * | 2011-07-06 | 2012-02-22 | 上海丹迪电力技术有限公司 | Direct-blowing type airtight seal oil shield structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239933A (en) * | 2006-03-10 | 2007-09-20 | Agc Seimi Chemical Co Ltd | Shaft seal device for powder processing device |
| CN202851980U (en) * | 2012-10-29 | 2013-04-03 | 张家港市亿利机械有限公司 | Main shaft sealing device of high-speed mixing machine |
| CN206571984U (en) * | 2017-03-23 | 2017-10-20 | 马鞍山市恒永利机械科技有限公司 | The air curtain generation unit and rotary shaft gas sealing mechanism of a kind of hermetic seal |
-
2017
- 2017-03-23 CN CN201811292303.XA patent/CN109237045B/en active Active
- 2017-03-23 CN CN201710176579.0A patent/CN106763797B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2622494Y (en) * | 2003-06-06 | 2004-06-30 | 彭建 | Dry air seal friction pair |
| CN101478190A (en) * | 2008-12-30 | 2009-07-08 | 洛阳轴研科技股份有限公司 | Air sealing construct design for electric main shaft of oil grease mill |
| CN201554860U (en) * | 2009-12-17 | 2010-08-18 | 北京蓝爱迪电力技术有限公司 | Gas seal type oil stop device |
| CN202149222U (en) * | 2011-07-06 | 2012-02-22 | 上海丹迪电力技术有限公司 | Direct-blowing type airtight seal oil shield structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827720A (en) * | 2019-04-02 | 2019-05-31 | 深圳市顺源精密机械有限公司 | A kind of air curtain test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106763797A (en) | 2017-05-31 |
| CN109237045B (en) | 2020-08-07 |
| CN106763797B (en) | 2019-02-01 |
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