CN107504193A - A kind of mechanical seal structure of lathe slow-speed shaft - Google Patents
A kind of mechanical seal structure of lathe slow-speed shaft Download PDFInfo
- Publication number
- CN107504193A CN107504193A CN201710635079.9A CN201710635079A CN107504193A CN 107504193 A CN107504193 A CN 107504193A CN 201710635079 A CN201710635079 A CN 201710635079A CN 107504193 A CN107504193 A CN 107504193A
- Authority
- CN
- China
- Prior art keywords
- door
- flange
- labyrinth
- groove
- boss
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- 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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4476—Labyrinth packings with radial path
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention discloses a kind of mechanical seal structure of lathe slow-speed shaft, including axle and bearing, an adpting flange component is connected between the axle and bearing, the door adpting flange component includes door labyrinth flange, door labyrinth bush and door waterproof flange, technical points and is：Door labyrinth flange and the opposite side of door labyrinth bush are both provided with the groove and boss of ring-type, both are mutually inserted by the groove and boss, the width of the groove, highly it is respectively greater than the width of the boss, highly, and the door waterproof blind flange is located on the outside of the door labyrinth bush, and the door waterproof flange is fixedly connected on the flange of the door labyrinth, excellent sealing can be played in low speed rotating shaft by aiming to provide one kind, the mechanical seal structure of lubrication and the lathe that will not be worn, particularly it is used in the mechanical seal structure for the lathe low speed rotating shaft that rotating speed is 20r/min to 200r/min.
Description
Technical field
The present invention relates to a kind of sealing structure of lathe, more specifically, it relates to the low speed sealing on a kind of lathe
Structure.
Background technology
Rotating shaft working environment in grinding machine is severe, and with fine sand formation cuttings and metal fillings are largely beaten, these foreigns include
Water, vapor are entered inside it easily by the gap between axle and bearing, and heat is produced especially in the rotary course of axle, is led
Cause water becomes vapor and entered in bearing, causes bearing rust, corrosion, so just needing lubrication and its sealing between axle and bearing
Structure, due to the static pressure of fluid or the effect of dynamic pressure, be filled between seal face one layer of complete fluid film force it is close
End-blocking face separates each other, but because the deficiency of power, the probability increase of seal face contact make oil film difficult in low speed environments
To be formed.In view of this situation, the grease lubrication under air-proof condition is used on lathe.
Common sealing structure includes：
1), hair felt-ring seal, although this sealing cost is cheap, it is contact seal, and abrasion is too fast, short life；
2), gap throttling grooved seal, it is made up of a series of with the non-contacting throttle clearance of rotating shaft, and the pressure of fluid is turned
This principle can be sealed to reach for speed, be unsuitable to apply to low speed；
3), skeleton oil seal, this sealing structure is simple, good seal performance, but high to technological requirement, is used on low speed
When, oil film produces process and uncertainty be present；
4), disc is sealed, and this sealing is thrown away fluid using centrifugal force, is only applicable to high speed shaft；
5), combination sealing, the sealing structure using above two or the combination of two or more sealing structures is referred to, due to above-mentioned close
Seal structure is used in that effect in low speed rotating shaft is bad, so the fortune that this combination sealing form still can not be good on slow-speed shaft
With.
And low speed rotating shaft is installed in lathe, the usual rotating speed of part machine tool chief axis, particularly centerless grinder introduction main shaft
It is 20r/min to 200r/min, and for a long time in 10~80r/min rotary speed working, so just needing design to be directed to slow-speed shaft
Sealing structure.
In the prior art, a kind of low speed rotation is disclosed in Application No. CN201320008173.9 Chinese invention patent
Rotating shaft sealing mechanism, including support and seal receptacle, low-speed rotary shaft pass through the support and seal receptacle, and the support is provided with
The support seal groove of annular and the movable wear-resisting annular groove of annular, the seal receptacle are provided with the seal receptacle seal groove of annular and are provided with
Seal receptacle bulge loop；Movable wear ring is provided with the wear-resisting annular groove of activity, the other end of movable wear ring stretches into the seal receptacle
In seal groove, the first stage clip is provided between the bottom land of movable wear ring and seal receptacle seal groove；The seal receptacle bulge loop is plugged in
In the support seal groove, pressure is provided with the second stage clip between the bottom land of seal receptacle bulge loop and support seal groove.The invention has soft
Property self-adjusting seal the characteristics of, to axiality require low, good sealing effect, simple in construction, easily fabricated, operation and maintenance, into
This is low, can effectively prevent internal flow from leaking or preventing external fluid to enter support.
Low-speed rotary shaft in foregoing invention patent reaches close on slow-speed shaft with sealing mechanism using labyrinth seal structure
The effect of envelope, but add wear-resistant trough and stage clip in this structure, is contact seal, there are contact frottage cause it is close
There is uncertain abrasion in seal structure, have impact on sealing property.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide one kind can low speed rotating shaft play excellent sealing,
The mechanical seal structure of lubrication and the lathe that will not be worn.
To achieve the above object, the invention provides following technical scheme：A kind of mechanical seal structure of lathe slow-speed shaft,
Including axle and bearing, an adpting flange component is connected between the axle and bearing, the door adpting flange component includes door fan
Palace flange, door labyrinth bush and door waterproof flange, wherein：Door labyrinth flange and the opposite side of door labyrinth bush are both provided with ring
The groove and boss of shape, both are mutually inserted by the groove and boss, and the width of the groove, height are respectively greater than described
The width of boss, height, and the door waterproof blind flange is located on the outside of the door labyrinth bush, and the door waterproof flange is fixed and connected
It is connected on the flange of the door labyrinth.
Further：The groove, the cross section of boss are both configured to rectangle.
Further door labyrinth flange and groove on door labyrinth bush, the quantity of boss are all respectively set to 2.
Further：The end face of the boss and the bottom land of groove leave 0.05 millimeter to 0.15 millimeter of gap.
Further：The width of the groove is bigger than the width of boss 0.01 millimeter to 0.06 millimeter.
Compared with prior art, the present invention reaches a kind of contactless mechanical seal using staggered labyrinth seal, leads to
Cross groove and boss is cooperatively formed and mutually staggered and depth is circumferential grooves between 0.05 millimeter to 0.15 millimeter, in force deformation
Circumferential waviness and radial direction taper is produced in the presence of thermal deformation, on sealing surface, is referred to as thermohydrodynamic in mechanical seal
Wedge, the wave amplitude of waviness is micro- order of magnitude, and due to the fluctuation of sealing surface flow boundary, under the traction of moving axis, circumferentially viscous
Property flowing alternately experience region of convergence and diverging region, in region of convergence, fluid film produces very high hydrodynamic pressure, is so become by heat
The circumferential waviness that shape and inner deformation are formed is with regard to that can produce a quiet additional opening force；Negative pressure can be produced in diverging region.More than this
The limit, air in liquid is dissolved in by separate out, produces cavitation phenomenon.Further, since the footpath that thermal deformation and inner deformation are formed
To taper under the effect of hydrostatic pressure effect, additional hydrostatic pressure bearing capacity will be produced, increase opening force.Opening force with
Closing force mutually balances each other so that sealing pair both ends of the surface are broken up into non-contacting mechanical seal.
The mechanical seal structure of lathe slow-speed shaft in the present invention, pass through the labyrinth that can not be used in script on slow-speed shaft
Sealing improvement is rectangular boss, the stagger arrangement labyrinth sealing that groove is mutually inserted, and makes described stagger arrangement labyrinth sealing as described above
Principle forms non-contacting seal, can either reach the effect of grease lubrication, and and can enough effectively prevents the moisture of outside, dust from entering
It is internal to enter sealing, and allows to have and expands with heat and contract with cold, adapts to high temperature, high pressure sealing.
Brief description of the drawings
Fig. 1 is the schematic diagram of the mechanical seal structure embodiment of lathe slow-speed shaft of the present invention；
Fig. 2 is the enlarged diagram at A in the mechanical seal structure embodiment of lathe slow-speed shaft of the present invention.
Reference：1. axle；2. bearing；A 3. labyrinth flange；A 4. labyrinth bush；5. waterproof flange；6. boss；It is 7. recessed
Groove；8. gap.
Embodiment
Sealing machine embodiment of the present invention is described further referring to figs. 1 to Fig. 2.
A kind of mechanical seal structure of lathe slow-speed shaft, including axle 1 and bearing 2, it is provided between the axle 1 and bearing 2
Door adpting flange component, wherein：The door adpting flange component includes door labyrinth flange 3, door labyrinth bush 4 and door waterproof flange 5,
The side of door labyrinth flange 3 is bolted to connection with bearing 2, and multiple annular boss 6 are arranged at intervals with opposite side
With groove 7, the width of the groove 7, height are respectively greater than width, height, door labyrinth flange 3 and the door of the boss 6
The quantity of groove 7, boss 6 on labyrinth bush 4 be all respectively set to 2 door labyrinth bush 4 side be also equipped with boss 6 with
Groove 7, its opposite side are fixedly connected with axle 1, and the quantity of groove 7, boss 6 on door labyrinth flange 3 and door labyrinth bush 4 is all
2 are respectively set to, the door labyrinth bush 4 passes through described boss 6, groove 7 and the grafting of door labyrinth flange 3, the door
Labyrinth bush 4 along circle projection is provided with week, the door waterproof flange 5 lid is located in the projection of the door labyrinth bush 4, and described
Door waterproof flange 5 is fixedly connected on door labyrinth flange 3, is the company of slip between the door labyrinth bush 4 and door labyrinth flange 3
Connect.
It is noted that the present invention is intended to provide a kind of mechanical seal structure in low speed rotating shaft, low speed herein
Rotating shaft refers in particular to the rotating shaft that rotating speed is 20r/min to 200r/min.
Therefore under said structure support, the boss 6, the groove that are mutually inserted on door labyrinth flange 3 and door labyrinth bush 4
7 form the effect of dual labyrinth seal, and add the labyrinth seal climbs water distance from strengthening the machine of the labyrinth seal
Tool sealing property, the labyrinth seal is used in the case of the slow-speed of revolution, can still play good mechanical sealing effect.
Preferably, as shown in Figure of description 2, the groove 7, the cross section of boss 6 are both configured to rectangle, make fluid,
Water body is flowing through boss 6, when turning right angle of groove 7, by by larger impact resistance, so as to consume fluid, in water body
Energy of flow, further improve the sealing effectiveness of the labyrinth seal.
Further, gap 8 is left in the end face of the boss 6 with the bottom land of groove 7, and the gap 8 is 5 millimeters to 15
Millimeter, and the width of the groove 7 is bigger than the width of boss 6 0.02 millimeter to 0.06 millimeter, by these preferred schemes, makes institute
The gap 8 for remaining and expanding with heat and contract with cold between groove 7 and boss 6 is stated, goes for described labyrinth seal structure various
The big operating environment of temperature change, while the friction between labyrinth flange 3 and door labyrinth bush 4 is also reduced, prevent both from going out
Now wear, strengthen its sealing property to the full extent, while also ensure that precision when being rotated between the axle and bearing 2 is inclined
Difference, ensure that lathe has the characteristics of precision is high, stability is good.
As prioritization scheme, the mechanical seal structure in the low speed rotating shaft of the present embodiment also sets up following structure：The door
Waterproof flange 5 is bolted with door labyrinth flange 3；The inner side and the inner side of door labyrinth bush 4 of door labyrinth flange 3 are put down
Together；The groove of annular is offered in the circumference of the axle 1, the groove location is arranged at a labyrinth bush 4；The door water-proofing method
The outside of orchid 5 is provided with convex edge, and the convex edge is wrapped in the outside of door labyrinth flange 3；By these settings, make this implementation
The mechanical seal structure of example more meets every technological design in actual machine sealing structure, it is more rationalized.
Claims (3)
1. a kind of mechanical seal structure of lathe slow-speed shaft, including axle and bearing, a connection is connected between the axle and bearing
Flange assembly, the door adpting flange component include door labyrinth flange, door labyrinth bush and door waterproof flange, it is characterised in that：Institute
State a labyrinth flange and the opposite side of door labyrinth bush is both provided with the groove and boss of ring-type, both pass through the groove and convex
Platform is mutually inserted, and the width of the groove, height are respectively greater than the width of the boss, height, and the door waterproof blind flange
It is located on the outside of the door labyrinth bush, and the door waterproof flange is fixedly connected on the flange of the door labyrinth, the groove, boss
Cross section be both configured to rectangle, the end face of the boss and the bottom land of groove leave 0.05 millimeter to 0.15 millimeter of gap.
2. the mechanical seal structure of lathe slow-speed shaft according to claim 1, it is characterized in that：Door labyrinth flange and door
The quantity of groove, boss on labyrinth bush is all respectively set to 2.
3. the mechanical seal structure of lathe slow-speed shaft according to claim 1, it is characterized in that：The width of the groove is than convex
The width of platform is big 0.01 millimeter to 0.06 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635079.9A CN107504193A (en) | 2017-07-30 | 2017-07-30 | A kind of mechanical seal structure of lathe slow-speed shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635079.9A CN107504193A (en) | 2017-07-30 | 2017-07-30 | A kind of mechanical seal structure of lathe slow-speed shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107504193A true CN107504193A (en) | 2017-12-22 |
Family
ID=60689277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710635079.9A Pending CN107504193A (en) | 2017-07-30 | 2017-07-30 | A kind of mechanical seal structure of lathe slow-speed shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107504193A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161037A (en) * | 2018-03-20 | 2018-06-15 | 黄小芬 | The spindle assemblies structure of numerically controlled tooth grinding machine |
-
2017
- 2017-07-30 CN CN201710635079.9A patent/CN107504193A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161037A (en) * | 2018-03-20 | 2018-06-15 | 黄小芬 | The spindle assemblies structure of numerically controlled tooth grinding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101809299B (en) | Hydrodynamic axial bearing | |
| US7914007B2 (en) | Segmented seal with hydrodynamic feature and assembly | |
| US7946591B2 (en) | Combined labyrinth seal and screw-type gasket bearing sealing arrangement | |
| CN104185755B (en) | Slide unit | |
| US5133562A (en) | Drained face seal | |
| JP2007506906A (en) | Thrust sliding bearing | |
| JP3936911B2 (en) | Sealing device for hydraulic turbomachine | |
| CN105041856A (en) | Bearing for wind turbine | |
| CN203822685U (en) | Fluoroplastic magnetic drive pump capable of approximate zero inner leakage | |
| CN101806362A (en) | Mechanical sealing device of middle rotating ring | |
| CN204175966U (en) | The mechanical seal structure of lathe lower velocity shaft | |
| CN103016743A (en) | Mechanical seal capable of implementing zero wear, zero leakage and preventing solid particles | |
| CN101832391A (en) | Mechanical sealing device | |
| CN107559331A (en) | Bearing block encapsulating method, sealing structure and the bearing block using the sealing structure | |
| CN107504193A (en) | A kind of mechanical seal structure of lathe slow-speed shaft | |
| CN201772069U (en) | Intermediate rotation ring mechanical sealing device | |
| CN206555446U (en) | A kind of self-lubricating non-contact mechanical seal device | |
| CN105351359A (en) | Fluid supporting tilting-pad bearing | |
| CN207178686U (en) | Zero leakage pumping formula mechanical seal | |
| CN201277266Y (en) | Bearing sealing ring and deep groove ball bearing | |
| CN206988428U (en) | A kind of combined low leakage mechanical seal end face structure of annular groove cavitation texture | |
| CN214466094U (en) | Split dovetail type mechanical sealing device | |
| CN106641204A (en) | Gearbox shaft end staggered tooth type combined labyrinth seal | |
| CN108361275A (en) | A kind of high speed deep groove ball bearing | |
| CN107327576A (en) | A kind of combined low leakage mechanical seal end face structure of annular groove cavitation texture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171222 |