CN202360764U - Unidirectional-rotation three-dimension L-shaped groove end face sealing structure - Google Patents
Unidirectional-rotation three-dimension L-shaped groove end face sealing structure Download PDFInfo
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- CN202360764U CN202360764U CN2011203641714U CN201120364171U CN202360764U CN 202360764 U CN202360764 U CN 202360764U CN 2011203641714 U CN2011203641714 U CN 2011203641714U CN 201120364171 U CN201120364171 U CN 201120364171U CN 202360764 U CN202360764 U CN 202360764U
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Abstract
A unidirectional-rotation three-dimension L-shaped groove end face sealing structure is characterized in that a sealing end face of a stationary ring or a rotating ring is provided with three-dimension L-shaped grooves which are uniformly distributed along the circumferential direction. The radial included angle alpha between each three-dimension L-shaped groove and the stationary ring or the rotating ring ranges from 20 degrees to 70 degrees. Each three-dimension L-shaped groove is composed of a flow supply groove and an unequal-depth rectangular groove. The three-dimension L-shaped grooves which are processed by a grinding method for improving fatigue strength can be applied in a sealing structure with a rotating ring or a stationary ring as a compensation ring. The three-dimension L-shaped grooves can be also applied for face-to-face sealing, back-to-back double-sealing, two-electrode serial-connection sealing, three-electrode serial-connection sealing, sealing combining dual seal and single seal or sealing combining single seal and double-electrode sealing. If the outer side of a seal is under low pressure and the inner side is under high pressure, the three-dimension L-shaped grooves can be equipped on the inner circumferential face of the seal. The sealing structure provided in the utility model achieves relatively large dynamic pressure bearing capacity, reduces friction wearing, and prolongs the service lifetime. Meanwhile, static seal of a sealing ring can be achieved in a dam zone.
Description
Technical field
The utility model relates to the running shaft end face seal structure, the three-dimensional L shaped groove end face seal structure of particularly a kind of unidirectional rotation.
Background technique
In the conventional fluid machinery, like centrifugal pump, its rotation axis seal is because working pressure is not high, and common mechanical seal device all can satisfy job requirement.But, for the present still difficult problem of the very high fluid machinery rotation axis seal of inlet pressure.
The basic principle of fluid lubrication mechanical seal is to adopt hydrostatic pressure, hydrodynamic or the dynamic and static pressure combination principle of fluid that the fluid film of sealing surfaces with micron dimension separated; Thereby under high pressure or high speed operation situation, realize " zero leakage ", and sealing has long working life.For realizing the hydrodynamic effect; Conventional method is to design the shallow trench that distributes along circumferentially at an end face of sealing rotating ring or stationary ring; Raise with the rotating speed of running shaft, fluid-encapsulated in the groove axially floated power because the variation of seal face gap brings the hydrodynamic effect to form.Fluid film between the dynamic and static ring can with the dynamic and static ring of sealing separately reduce wear on the one hand; Also can realize fluid-encapsulated forward or reverse pumping on the other hand, play seal action.Fluid lubrication seal friction coefficient is low, can accomplish zero leakage through groove shape design and physical dimension control.Like Chinese utility model patent 200710024397.8 disclosed a kind of high-pressure mechanical seals of on seal face, slotting, relate at seal ring and offer semicircle, rectangle, crescent shape, triangle, rhombus and compound flute profile thereof near cycle surface.One of important content of its patent application is: it can make mechanical seal end surface produce dynamic pressure effect, strengthens the end face fluid film and forms, and improves the lubricating condition of seal face, the phase transformation of suppression fluid film.All kinds of flute profiles that this patent relates to such as are at deep trouth; Though can produce the hydrodynamic effect in the high pressure Environmental Conditions; And can form a relative zone of high pressure at seal face, but owing to wait the limitation of deep trouth shape, the hydrodynamic effect is not strong; So under high pressure can not guarantee zero leakage, and in start-up course, can cause the wearing and tearing of end face.The three-dimensional groove that China's utility model patent 01102213.2 spiral groove end sealer capable of being rotated in both directions, Chinese utility model patent 02146449.9 double helix angle three-dimensional spiral groove face seals and Japan Patent 2006-009897 seal ring (seal ring) have proposed to have the convergence wedge shape.Three-dimensional convergence groove has better hydrodynamic effect.But Chinese utility model patent 02146449.9 flute profile is complicated, and manufacturing needs specific process; The spiral grooves of China's utility model patent 01102213.2 two-way rotation is operated in the fluid machinery under the unidirectional rotation operating mode for major part, and the groove that its de-rotation direction is offered can have a negative impact to the hydrodynamic effect that forward is restrained groove; The three-dimensional groove shape that Japan Patent 2006-009897 proposes because the groove fuel feeding is insufficient, is prone to cause the direct wearing and tearing of seal face when inlet pressure increases suddenly, thereby destroys the physical dimension of wedge shape, makes it effectively to work according to the design original intention.
Summary of the invention
In order to overcome the deficiency of above-mentioned existing technology, the purpose of the utility model is to provide a kind of unidirectional rotation three-dimensional L shaped groove end face seal structure, has reduced fretting wear, has improved working life.
In order to achieve the above object, the technological scheme taked of the utility model is:
The three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation, on the seal face of stationary ring or rotating ring, be provided with stationary ring or rotating ring radially angle be the three-dimensional L type groove 1 of 20-70 degree and along the circumferential direction evenly distribute.
Described each three-dimensional L shaped groove 1 is L by radially waiting the dark H of being, flute length
2The confession chute and with supply that chute acutangulates α do not wait dark rectangle groove L
3Form, do not wait dark rectangle groove L
3Groove depth along sense of rotation from depth to shallow until joining with parallel end faces, thereby form a kind of convergence rectangle groove.
The described confession chute degree of depth 5 μ m～10 μ m.
Described convergence rectangle groove maximum depth 5 μ m～10 μ m, maximum groove depth can not restrain rectangle groove section gradient 1: 1500～1: 1000 greater than supplying chute dark.
Described convergence rectangle groove equates with the feed tank width.
The L shaped groove 1 of described three-dimensional compares smaller or equal to 1 along the width of circumferential distributing slot with platform.
The fillet that L shaped groove 1 root of described three-dimensional has long radius, fillet radius is got greatly according to the feed tank width as far as possible.
The L shaped groove of described three-dimensional 1 adopts method for grinding processing, reduces the generation to effect of material performance and crizzle of material local deformation, surface heat stress, thereby improves fatigue strength.
L shaped groove 1 end face seal structure of described three-dimensional; Can be used in the rotating ring and be compensated loop or be in the sealing configuration of compensated loop with the stationary ring; Also can be used in face-to-face formula double-sealing, back-to-back formula double-sealing, two-stage series connection sealing, three grades of combined or single sealings and the combined sealing of twin-stage sealing of series seal, double-sealing and single sealing; If the sealing outside is a low pressure, the inboard is a high pressure, and three-dimensional L shaped groove 1 also can be opened on sealing inside circumference face.
The utility model is applicable to various rotary fluid machines, the end face seal of particularly high pressure sealing operating mode.Its advantage is: compare with waiting deep trouth; Produce the similar thunder row ladders of dark section such as hydrodynamic support force, confession chute along the convergence rectangle groove that circumferentially distributes, can produce the hydrodynamic support force, above-mentioned support force separates seal face; Thickness is bigger; Avoid the direct contact of end face, reduce fretting wear, improved working life.Simultaneously and since radially with circumferential dual hydrodynamic effect, the opening time of seal face is shortened greatly, thereby reduced the end wear of unseal process.In addition, it is enough fluid-encapsulated that three-dimensional L shaped groove 1 provides, and can make running shaft under running down, can keep the Liquid Lubrication Condition of certain hour, avoids unexpected reduction of speed to cause seal face to lose support, and seal face is directly contacted, and causes wearing and tearing.In the utility model, the internal side diameter of three-dimensional L shaped groove 1 has a plane endless belt, promptly seals the dam, and it can play throttling action when axle rotates; When axle is static, play the parking sealer effect.
Three-dimensional L shaped groove 1 adopts method for grinding processing, and the fillet that can make groove bottom have long radius on the structure can prevent residual in groove of impurity in fluid-encapsulated.Grinding has reduced the generation to effect of material performance and crizzle of material local deformation, surface heat stress with respect to laser beam machining, electric discharge machining etc., thereby improves fatigue strength.Grinding is easy to realize, efficient is high and be easy to control the conformity and the precision of flute profile physical dimension.
Description of drawings
Fig. 1-a is the plan view of the utility model when turning clockwise.
Fig. 1-b is the A-A enlarged diagram of Fig. 1.
Fig. 1-c is the B-B enlarged diagram of Fig. 1.
Wherein: L
1---the groove width of three-dimensional L shaped groove, L
2---supply the length of chute in the three-dimensional L shaped groove, L
3---the circumferential lengths of three-dimensional L shaped groove rectangle groove, α---supply chute and peripheral groove angle, R
1---end face sealing ring outer radius, R
2---end face sealing ring inside radius, R
3---three-dimensional L shaped groove root fillet radius, H---three-dimensional L shaped groove supplies the chute degree of depth and converging channel maximum depth, z---along the circumferential direction three-dimensional L shaped groove rectangle groove number.
Fig. 2 is the plan view of the utility model when being rotated counterclockwise.
Fig. 3 is the utility model embodiment one a assembly structure figure, and seal rotating ring this moment is compensated loop.
Fig. 4 is the utility model embodiment two a assembly structure figure, and this moment, stationary seal ring was a compensated loop.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done detailed description.
With reference to Fig. 1-a, Fig. 1-b, Fig. 1-c and Fig. 2; The three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation, on the seal face of stationary ring or rotating ring, be provided with stationary ring or rotating ring radially angle be the three-dimensional L type groove 1 of 20-70 degree and along the circumferential direction evenly distribute.
Described each three-dimensional L shaped groove 1 is L by radially waiting the dark H of being, flute length
2The confession chute and with supply that chute acutangulates α do not wait dark rectangle groove L
3Form, do not wait dark rectangle groove L
3Groove depth along sense of rotation from depth to shallow until joining with parallel end faces, thereby form a kind of convergence rectangle groove.
The described confession chute degree of depth 5 μ m～10 μ m.
Described convergence rectangle groove maximum depth 5 μ m～10 μ m, maximum groove depth can not restrain rectangle groove section gradient 1: 1500～1: 1000 greater than supplying chute dark.
Described convergence rectangle groove equates with the feed tank width.
The L shaped groove 1 of described three-dimensional compares smaller or equal to 1 along the width of circumferential distributing slot with platform.
The fillet that L shaped groove 1 root of described three-dimensional has long radius, fillet radius is got greatly according to the feed tank width as far as possible.
The L shaped groove of described three-dimensional 1 adopts method for grinding processing, reduces the generation to effect of material performance and crizzle of material local deformation, surface heat stress, thereby improves fatigue strength.
L shaped groove 1 end face seal structure of described three-dimensional; Can be used in the rotating ring and be compensated loop or be in the sealing configuration of compensated loop with the stationary ring; Also can be used in face-to-face formula double-sealing, back-to-back formula double-sealing, two-stage series connection sealing, three grades of combined or single sealings and the combined sealing of twin-stage sealing of series seal, double-sealing and single sealing; If the sealing outside is a low pressure, the inboard is a high pressure, and three-dimensional L shaped groove 1 also can be opened on sealing inside circumference face.
With reference to Fig. 3, the sealing device comprises: main shaft 15, axle sleeve 2, spring guide 3, spring 4, shell 5, spring support 6, first auxiliary seal ring 7, sealing rotating ring or compensated loop 8, second auxiliary seal ring 9, stationary seal ring 10, the 3rd auxiliary seal ring 11, stationary seal ring bearing 12, stop pin 13 and the 4th auxiliary seal ring 14.In the present embodiment, the outside of establishing seal face is the high pressure side, and the seal face inboard is a low voltage side.The three-dimensional L shaped groove 1 of arranged outside on rotating ring 8 end faces.Three-dimensional L shaped groove 1 will produce the hydrodynamic effect under given rotation direction, will seal dynamic and static ring end face separately, and can produce fluid-encapsulated pumping by high side to low side.Inner side plane annular at the L shaped groove 1 of three-dimensional takes up throttling and parking sealer effect.
It is the sealing system of compensated loop with the stationary seal ring that same working principle can be used for shown in Figure 4.Among Fig. 4: main shaft 15, axle sleeve 2, driving pin 16, sealing rotating ring 8, the first auxiliary seal rings 7; Stationary seal ring 10, stop pin 13, the second auxiliary seal rings 9, stationary seal ring bearing 12; Seal casinghousing 5, the three auxiliary seal rings 11, the four auxiliary seal rings 14, bearing 18; Spring stop 17, spring support 6, spring 4 is provided with three-dimensional L shaped groove 1 on the end face of stationary seal ring 10.
Enforcement the utility model patent has various ways: list sealing, face-to-face formula double-sealing, back-to-back formula double-sealing, two-stage series connection sealing, three grades of series seals, double-sealings and lists seal combined or single the sealing with twin-stage and seal combined sealing etc.Compensated loop in the seal arrangement can be a rotating ring, also can be stationary ring.
Claims (9)
1. three-dimensional L shaped groove end face seal structure of unidirectional rotation is characterized in that: on the seal face of stationary ring or rotating ring, be provided with stationary ring or rotating ring radially angle be the three-dimensional L type groove (1) of 20-70 degree and along the circumferential direction evenly distribute.
2. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 1 is characterized in that: described each three-dimensional L shaped groove (1) is L by radially waiting the dark H of being, flute length
2The confession chute and with supply that chute acutangulates α do not wait dark rectangle groove L
3Form, do not wait dark rectangle groove L
3Groove depth along sense of rotation from depth to shallow until joining with parallel end faces, thereby form a kind of convergence rectangle groove.
3. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 2 is characterized in that: the described confession chute degree of depth 5 μ m～10 μ m.
4. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 2; It is characterized in that: described convergence rectangle groove maximum depth 5 μ m～10 μ m; Maximum groove depth can not restrain rectangle groove section gradient 1: 1500～1: 1000 greater than supplying chute dark.
5. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 2, it is characterized in that: described convergence rectangle groove equates with the feed tank width.
6. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 1 is characterized in that: the L shaped groove of described three-dimensional (1) compares smaller or equal to 1 along the width of circumferential distributing slot with platform.
7. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 1 is characterized in that: the fillet that the L shaped groove of described three-dimensional (1) root has long radius, fillet radius is got greatly according to the feed tank width as far as possible.
8. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 1 is characterized in that: the L shaped groove of described three-dimensional (1) adopts method for grinding processing.
9. the three-dimensional L shaped groove end face seal structure of a kind of unidirectional rotation according to claim 1 is characterized in that: if the sealing outside is low pressure, the inboard is a high pressure, and three-dimensional L shaped groove (1) is opened on sealing inside circumference face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203641714U CN202360764U (en) | 2011-09-26 | 2011-09-26 | Unidirectional-rotation three-dimension L-shaped groove end face sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203641714U CN202360764U (en) | 2011-09-26 | 2011-09-26 | Unidirectional-rotation three-dimension L-shaped groove end face sealing structure |
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| Publication Number | Publication Date |
|---|---|
| CN202360764U true CN202360764U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203641714U Expired - Fee Related CN202360764U (en) | 2011-09-26 | 2011-09-26 | Unidirectional-rotation three-dimension L-shaped groove end face sealing structure |
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| CN (1) | CN202360764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359596A (en) * | 2011-09-26 | 2012-02-22 | 清华大学 | Seal structure with unidirectionally-rotatable three-dimensional L-shaped groove end face |
-
2011
- 2011-09-26 CN CN2011203641714U patent/CN202360764U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359596A (en) * | 2011-09-26 | 2012-02-22 | 清华大学 | Seal structure with unidirectionally-rotatable three-dimensional L-shaped groove end face |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20170926 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |