CN204175966U - The mechanical seal structure of lathe lower velocity shaft - Google Patents
The mechanical seal structure of lathe lower velocity shaft Download PDFInfo
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- CN204175966U CN204175966U CN201420559597.9U CN201420559597U CN204175966U CN 204175966 U CN204175966 U CN 204175966U CN 201420559597 U CN201420559597 U CN 201420559597U CN 204175966 U CN204175966 U CN 204175966U
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Abstract
The utility model discloses a kind of mechanical seal structure of lathe lower velocity shaft, comprise axle and bearing, an adpting flange assembly is connected with between described axle and bearing, described door adpting flange assembly comprises a labyrinth flange, door labyrinth bush and door waterproof flange, its technological points is: described door labyrinth flange and door labyrinth bush side in opposite directions are all provided with groove and the boss of ring-type, both are by described groove and the mutual grafting of boss, the width of described groove, be greater than the width of described boss highly respectively, highly, and described door waterproof blind flange is located at outside described door labyrinth bush, and described door waterproof flange is fixedly connected on the flange of described door labyrinth, aim to provide one and can play excellent sealing in low speed rotating shaft, lubrication and the mechanical seal structure of the lathe that can not wear and tear, particularly be used in the mechanical seal structure that rotating speed is the lathe low speed rotating shaft of 20r/min to 200r/min.
Description
Technical field
The utility model relates to a kind of sealing configuration of lathe, and more particularly, it relates to the lower velocity shaft sealing configuration on a kind of lathe.
Background technique
Rotating shaft work under bad environment in grinding machine, with beating fine sand formation cuttings and metal fillings in a large number, these foreign comprise water, water vapour easily enters into its inside by the gap between axle and bearing, especially in the rotary course of axle, heat is produced, causing water to become water vapour enters in bearing, cause bearing rust, corrosion, so just need lubrication and sealing configuration thereof between axle and bearing, due to the static pressure of fluid or the effect of dynamic pressure, between seal face, be filled with the complete fluid film of one deck forces seal face separated from one another, but due to the deficiency of power in low speed environments, the probability increase of seal face contact makes oil film be difficult to be formed.Given this plant situation, lathe adopts the grease lubrication under air-proof condition.
Common sealing configuration includes:
1), hair felt ring seal, although this sealing is with low cost, it is contact seal, and wearing and tearing are too fast, the life-span is short;
2), gap throttling grooved seal, it is made up of with the non-contacting throttle clearance of rotating shaft a series of, the pressure of fluid is transferred to speed and can reach this principle of sealing, be not suitable for being used in low speed;
3), skeleton oil seal, this sealing configuration is simple, good seal performance, but high to technological requirement, and when being used on low speed, oil film production process exists uncertain;
4), disc seals, and this sealing utilizes centrifugal force to be thrown away by fluid, is only applicable to high speed shaft;
5), combination seal, refers to utilize two or more the sealing configuration of sealing configuration combination above-mentioned, and due to above-mentioned sealing configuration, to be used in effect in low speed rotating shaft bad, so the utilization that this combination seal form still can not be good on lower velocity shaft.
And low speed rotating shaft is installed, part machine tool chief axis in lathe, particularly the usual rotating speed of centerless grinding machine introduction main shaft is 20r/min to 200r/min, and for a long time at the rotary speed working of 10 ~ 80r/min, so just need design to be directed to the sealing configuration of lower velocity shaft.
In prior art, be disclose a kind of low-speed rotary shaft sealing mechanism in the Chinese utility model patent of CN201320008173.9 at application number, comprise support and sealing seat, low-speed rotary shaft is through described support and sealing seat, described support is provided with the support seal groove of annular and the wear-resisting annular groove of activity of annular, and described sealing seat is provided with the sealing seat seal groove of annular and is provided with sealing seat bulge loop; Be provided with movable wear ring in the wear-resisting annular groove of described activity, the other end of movable wear ring stretches in described sealing seat seal groove, is provided with the first stage clip between the bottom land of movable wear ring and sealing seat seal groove; Described sealing seat bulge loop is plugged in described support seal groove, has been installed with the second stage clip between the bottom land of sealing seat bulge loop and support seal groove.This model utility has the feature of flexible self-adjusting seal, requires low, good sealing effect to coaxality, and structure is simple, and be easy to manufacture, operation and maintenance, cost is low, can effectively prevent internal flow from leaking or stop external fluid to enter support.
Low-speed rotary shaft sealing mechanism in above-mentioned utility model patent adopts labyrinth seal structure to reach the effect that lower velocity shaft seals, but add wear-resistant trough and stage clip in this structure, for contact seal, having contact friction causes sealing configuration to there are uncertain wearing and tearing, have impact on sealability.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of can play excellent sealing, lubrication and the mechanical seal structure of the lathe that can not wear and tear in low speed rotating shaft.
For achieving the above object, the utility model provides following technological scheme: a kind of mechanical seal structure of lathe lower velocity shaft, comprise axle and bearing, an adpting flange assembly is connected with between described axle and bearing, described door adpting flange assembly comprises a labyrinth flange, door labyrinth bush and door waterproof flange, wherein: described door labyrinth flange and door labyrinth bush side in opposite directions are all provided with groove and the boss of ring-type, both are by described groove and the mutual grafting of boss, the width of described groove, be greater than the width of described boss highly respectively, highly, and described door waterproof blind flange is located at outside described door labyrinth bush, and described door waterproof flange is fixedly connected on the flange of described door labyrinth.
Further: the cross section of described groove, boss is all set to rectangle.
Groove further on described door labyrinth flange and door labyrinth bush, the quantity of boss are set to 2 all respectively.
Further: the end face of described boss and the bottom land of groove leave the gap of 0.05 millimeter to 0.15 millimeter.
Further: larger than the width of boss 0.01 millimeter to 0.06 millimeter of the width of described groove.
Compared with prior art, the utility model utilizes staggered labyrinth seal to reach a kind of contactless mechanical seal, to coordinate with boss to be formed by groove and mutually to stagger and the degree of depth is circumferential grooves between 0.05 millimeter to 0.15 millimeter, under the effect of force deformation and thermal distortion, sealing surface produces circumferential waviness and radial tapering, thermohydrodynamic wedge is referred to as in mechanical seal, 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, viscous flow is circumferentially experience region of convergence and diverging region alternately, in region of convergence, fluid film produces very high hydrodynamic pressure, the circumferential waviness formed by thermal distortion and inner distortion so just can produce a quiet additional opening force, negative pressure can be produced in diverging region.Exceed this limit, the air be dissolved in liquid will dissociate out, produce cavitation phenomenon.In addition, the radial tapering formed due to thermal distortion and inner distortion, under the effect of hydrostatic pressure effect, by producing additional hydrostatic pressure bearing capacity, makes opening force increase.Opening force and closing force balance mutually, make sealing pair both ends of the surface separately become non-contacting mechanical seal.
The mechanical seal structure of the lathe lower velocity shaft in the utility model, by by the labyrinth seal improvement that originally can not be used on lower velocity shaft being the stagger arrangement labyrinth sealing of rectangular boss, the mutual grafting of groove, described stagger arrangement labyrinth sealing such as above-mentioned principle is made to define noncontact seal, the effect of grease lubrication can either be reached, effectively can prevent again outside moisture, dust enters sealed inside, and allowed to expand with heat and contract with cold, adapt to high temperature, high pressure sealing.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the mechanical seal structure embodiment of the utility model lathe lower velocity shaft;
Fig. 2 is the enlarged diagram at A place in the mechanical seal structure embodiment of the utility model lathe lower velocity shaft.
Reference character: 1. axle; 2. bearing; 3. a labyrinth flange; 4. a labyrinth bush; 5. waterproof flange; 6. boss; 7. groove; 8. gap.
Embodiment
Referring to figs. 1 through Fig. 2, the utility model sealing machine embodiment is described further.
A kind of mechanical seal structure of lathe lower velocity shaft, comprise axle 1 and bearing 2, an adpting flange assembly is provided with between described axle 1 and bearing 2, wherein: described door adpting flange assembly comprises a labyrinth flange 3, door labyrinth bush 4 and door waterproof flange 5, flange 3 side, described door labyrinth and bearing 2 are bolted to connection, opposite side is arranged at intervals with boss 6 and the groove 7 of multiple annular, the width of described groove 7, be greater than the width of described boss 6 highly respectively, highly, groove 7 on described door labyrinth flange 3 and door labyrinth bush 4, the side that the quantity of boss 6 is set to 2 described door labyrinth bush 4 all respectively is also provided with boss 6 and groove 7, its opposite side is fixedly connected with axle 1, groove 7 on described door labyrinth flange 3 and door labyrinth bush 4, the quantity of boss 6 is set to 2 all respectively, described door labyrinth bush 4 is by described boss 6, groove 7 and flange 3 grafting of described door labyrinth, described door labyrinth bush 4 protruding along being provided with a circle week, described door waterproof flange 5 lid is located in the projection of described door labyrinth bush 4, and described door waterproof flange 5 is fixedly connected on described door labyrinth flange 3, for being slidably connected between described door labyrinth bush 4 and door labyrinth flange 3.
It is noted that the utility model aims to provide a kind of mechanical seal structure in low speed rotating shaft, low speed rotating shaft herein refers in particular to the rotating shaft that rotating speed is 20r/min to 200r/min.
Therefore under said structure is supported, the boss 6 of grafting mutually on described door labyrinth flange 3 and door labyrinth bush 4, groove 7 define the effect of dual labyrinth seal, what add described labyrinth seal climbs water distance, strengthen the mechanical sealing performance of described labyrinth seal, under making described labyrinth seal be used in slow-speed of revolution situation, still can play good mechanical sealing effect.
Preferably, as shown in Figure of description 2, the cross section of described groove 7, boss 6 is all set to rectangle, make fluid, water body flow through boss 6, groove 7 turn right angle time, larger impact resistance will be subject to, thus the energy of flow consumed in fluid, water body, improve the sealing effect of described labyrinth seal further.
Further, the end face of described boss 6 and the bottom land of groove 7 leave gap 8, described gap 8 is 5 millimeters to 15 millimeters, and larger than the width of boss 6 0.02 millimeter to 0.06 millimeter of the width of described groove 7, by these preferred versions, make between described groove 7 and boss 6, to remain the gap 8 of expanding with heat and contract with cold, described labyrinth seal structure is made to go for the large operating environment of various temperature variation, also reduce the friction between labyrinth flange 3 and door labyrinth bush 4 simultaneously, prevent both from occurring wearing and tearing, strengthen its sealability to the full extent, also ensure that accuracy error when rotating between described axle and bearing 2 simultaneously, ensure that lathe has precision high, the feature of good stability.
As optimized project, the mechanical seal structure in the low speed rotating shaft of the present embodiment also arranges following structure: described door waterproof flange 5 is bolted with door labyrinth flange 3; The inner side of described door labyrinth flange 3 is concordant with the inner side of door labyrinth bush 4; The circumference of described axle 1 offers the groove of annular, described groove location is arranged on a labyrinth bush 4 place; The arranged outside of described door waterproof flange 5 has convex edge, and described convex edge is wrapped in the outside of described door labyrinth flange 3; Arranged by these, make the every technological design in the more realistic mechanical seal structure of the mechanical seal structure of the present embodiment, make it more rationalize.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. the mechanical seal structure of a lathe lower velocity shaft, comprise axle and bearing, an adpting flange assembly is connected with between described axle and bearing, described door adpting flange assembly comprises a labyrinth flange, door labyrinth bush and door waterproof flange, it is characterized in that: described door labyrinth flange and door labyrinth bush side in opposite directions are all provided with groove and the boss of ring-type, both are by described groove and the mutual grafting of boss, the width of described groove, be greater than the width of described boss highly respectively, highly, and described door waterproof blind flange is located at outside described door labyrinth bush, and described door waterproof flange is fixedly connected on the flange of described door labyrinth.
2. the mechanical seal structure of lathe lower velocity shaft according to claim 1, is characterized in that: the cross section of described groove, boss is all set to rectangle.
3. the mechanical seal structure of lathe lower velocity shaft according to claim 1 and 2, is characterized in that: the groove on described door labyrinth flange and door labyrinth bush, the quantity of boss are set to 2 all respectively.
4. the mechanical seal structure of lathe lower velocity shaft according to claim 1 and 2, is characterized in that: the end face of described boss and the bottom land of groove leave the gap of 0.05 millimeter to 0.15 millimeter.
5. the mechanical seal structure of lathe lower velocity shaft according to claim 4, is characterized in that: larger than the width of boss 0.01 millimeter to 0.06 millimeter of the width of described groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559597.9U CN204175966U (en) | 2014-09-26 | 2014-09-26 | The mechanical seal structure of lathe lower velocity shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559597.9U CN204175966U (en) | 2014-09-26 | 2014-09-26 | The mechanical seal structure of lathe lower velocity shaft |
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| CN204175966U true CN204175966U (en) | 2015-02-25 |
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| CN201420559597.9U Active CN204175966U (en) | 2014-09-26 | 2014-09-26 | The mechanical seal structure of lathe lower velocity shaft |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382326A (en) * | 2015-11-30 | 2016-03-09 | 太原科技大学 | Mechanical disc shearing machine used for shearing thick steel plate |
| CN106089759A (en) * | 2016-08-02 | 2016-11-09 | 美佳德科技（无锡）有限公司 | heat insulation vortex pump |
| CN106402402A (en) * | 2016-11-03 | 2017-02-15 | 北京交通大学 | Staggered maze cooling reaction still magnetic liquid sealing device |
| CN110919516A (en) * | 2019-11-26 | 2020-03-27 | 神华铁路货车运输有限责任公司 | Dynamic and static pressure bearing type rust removal assembly and wheel set rust removal device |
-
2014
- 2014-09-26 CN CN201420559597.9U patent/CN204175966U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382326A (en) * | 2015-11-30 | 2016-03-09 | 太原科技大学 | Mechanical disc shearing machine used for shearing thick steel plate |
| CN106089759A (en) * | 2016-08-02 | 2016-11-09 | 美佳德科技（无锡）有限公司 | heat insulation vortex pump |
| CN106402402A (en) * | 2016-11-03 | 2017-02-15 | 北京交通大学 | Staggered maze cooling reaction still magnetic liquid sealing device |
| CN110919516A (en) * | 2019-11-26 | 2020-03-27 | 神华铁路货车运输有限责任公司 | Dynamic and static pressure bearing type rust removal assembly and wheel set rust removal device |
| CN110919516B (en) * | 2019-11-26 | 2021-02-05 | 神华铁路装备有限责任公司 | Dynamic and static pressure bearing type rust removal assembly and wheel set rust removal device |
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