CN206889676U - A kind of semi-contact graphite seal device - Google Patents
A kind of semi-contact graphite seal device Download PDFInfo
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- CN206889676U CN206889676U CN201720753525.1U CN201720753525U CN206889676U CN 206889676 U CN206889676 U CN 206889676U CN 201720753525 U CN201720753525 U CN 201720753525U CN 206889676 U CN206889676 U CN 206889676U
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Abstract
A kind of semi-contact graphite seal device is the utility model is related to, the semi-contact graphite seal device includes friction rotating ring and graphite stationary ring, and inner ring surface and the rotating shaft gap of the friction rotating ring coordinate, and the abrasive end face of the friction rotating ring is in contact with the end face of graphite stationary ring；The uniform multiple mutually isostructural spiral shallow slots of abrasive end face, each spiral shallow slot is stretched out by the intersection of abrasive end face and inner ring surface along abrasive end face, so that spiral shallow slot forms opening on inner ring surface, abrasive end face is provided with the voltage stabilizing annular groove of annular, the tail end of each spiral shallow slot communicates with voltage stabilizing annular groove, so as to be connected between the tail end of each spiral shallow slot；The voltage stabilizing annular groove is coaxially disposed with friction rotating ring, the internal diameter that the internal diameter of voltage stabilizing annular groove is more than graphite stationary ring is set, the external diameter that the external diameter of voltage stabilizing annular groove is less than graphite stationary ring is set, during so that friction rotating ring assembling with graphite stationary ring, voltage stabilizing annular groove is completely covered in the end face of graphite stationary ring, while the afterbody of spiral shallow slot is covered by the end face of graphite stationary ring.
Description
Technical field
Technical field of mechanical is the utility model is related to, particularly a kind of semi-contact graphite seal device.
Background technology
It is general using contact for needing the high rotating speed mechanical driving device sealed in aero-engine and turbo-starter
Formula flat seal graphite seal device, this sealing device are high to the requirement on machining accuracy of sealing surface, and yield rate is low, and cost is high
It is high.At work, sealing surface contact friction is big, and power consumption is high, and easy heat, sealing life is short, using contact flat seal also without
Method avoids leakage of oil problem.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of semi-contact stone simple in construction, improving sealing effectiveness
Black densification device.The utility model passes through inactive state friction rotating ring friction side and the contact plane with graphite stationary ring friction side
Static seal together with the voltage stabilizing air film and oil film non-contacting seal of the state of running at high speed with realizing combination sealing, enhancing sealing effect
Fruit.
In order to solve the above technical problems, semi-contact graphite seal device provided by the utility model, including graphite stationary ring
With the friction rotating ring rotated with rotating shaft, inner ring surface and the rotating shaft gap of the friction rotating ring coordinate, the abrasive end face of the friction rotating ring
It is in contact with the end face of graphite stationary ring；The uniform multiple mutually isostructural spiral shallow slots of the abrasive end face, each spiral shallow slot is by rubbing
The intersection for wiping end face and inner ring surface stretches out along abrasive end face, so that spiral shallow slot forms opening on inner ring surface, it is described
Abrasive end face is provided with the voltage stabilizing annular groove of annular, and the tail end of each spiral shallow slot communicates with the voltage stabilizing annular groove, so that each spiral shallow slot
Tail end between connect；The voltage stabilizing annular groove is coaxially disposed with the friction rotating ring, and the internal diameter of the voltage stabilizing annular groove is more than described
The internal diameter of graphite stationary ring is set, and the external diameter of the voltage stabilizing annular groove is less than the external diameter setting of the graphite stationary ring, so that the friction
When rotating ring assembles with the graphite stationary ring, the voltage stabilizing annular groove, while spiral shallow slot is completely covered in the end face of the graphite stationary ring
Afterbody by graphite stationary ring end face cover；In use, sealed cushion rubber progress is close between the inner ring surface of friction rotating ring and rotating shaft
Envelope, friction rotating ring is with axis of rotation, and due to the rotation for the rotating ring that rubs, spiral shallow slot will rub between rotating ring inner ring surface and rotating shaft
Air and the lubricating oil accumulated are pumped into spiral shallow slot and diffusion, then in voltage stabilizing ring groove shape into voltage stabilizing compression ring, so that friction rotating ring rubs
Wipe and stable sealing air film and oil film are formed between end face and graphite stationary ring end face, form non-contacting seal, enhancing sealing effect
Fruit.
Further, each spiral shallow slot is from the hand of spiral of interior radial outer diameter and the direction of rotation of the rotating shaft on the contrary, being easy to
By the air and lubricating oil introducing spiral shallow slot between rotating ring inner ring surface and rotating shaft of rubbing.
Further, the spiral shallow slot is set in enlarging, and the groove width of spiral shallow slot tail end is more than the groove width of its openend, spiral shell
The groove depth for revolving shallow slot tail end is more than the groove depth of its openend, when high speed rotates so that when air and lubricating oil enter spiral shallow slot
It is decelerated diffusion.
Further, the circumferentially arranged cushion rubber annular groove of inner ring surface of the friction rotating ring, rubs close between rotating ring and rotating shaft
Sealing rubber ring is placed in cushion rubber annular groove.
Further, the external diameter of the graphite stationary ring end face is less than the external diameter setting of the friction rotating ring abrasive end face, the stone
The external diameter of black stationary ring end face is bigger at least 2mm than the external diameter of the voltage stabilizing annular groove to be set, to ensure that graphite stationary ring end face is dynamic with friction
Sealing plane contact area and sealing air film and film area between ring abrasive end face, rub rotating ring inactive state, it is ensured that real
Now rub the plane static seal of rotating ring friction side and graphite stationary ring friction side, the state that runs at high speed then ensure to realize voltage stabilizing air film and
Oil film non-contacting seal.
Further, the internal diameter of the graphite stationary ring end face is no more than friction rotating ring abrasive end face internal diameter and voltage stabilizing annular groove internal diameter
The half of sum is set, so that graphite stationary ring end face has enough area coverages to spiral shallow slot, forms enough diffusion chambers, is protected
Demonstrate,prove and voltage stabilizing compression ring is formed in voltage stabilizing annular groove, to ensure to seal the sealing effectiveness of air film and oil film.
The technique effect of utility model：（1）Semi-contact graphite seal device of the present utility model, relative to existing skill
Art, the voltage stabilizing annular groove of annular is set so that the tail end of each spiral shallow slot connects so that air on the abrasive end face for the rotating ring that rubs
Voltage stabilizing annular groove is flowed into after spiral shallow slot diffusion with lubricating oil and circumferentially form regulation loop, and the external diameter of voltage stabilizing annular groove is less than the stone
The external diameter of black stationary ring is set so that voltage stabilizing compression ring, non-contacting seal air film and oil film are real together with plane contact type static seal
Existing combination sealing, the reliability and stability of sealing are effectively improved, improve the sealing effect between friction rotating ring and graphite stationary ring
Fruit；（2）Spiral shallow slot is set in enlarging so that air and lubricating oil are decelerated diffusion after entering spiral shallow slot, using being pumped into dynamic pressure
The oil pump oil back chamber that effect will leak out from sealing surface, solves the problems, such as flat seal leakage of oil, realizes the seepage of lubricating oil zero
Zero effusion；（3）The direction of rotation of the hand of spiral of each spiral shallow slot from internal diameter to external diameter and the rotating shaft on the contrary, beneficial to air and
Lubricating oil enters spiral shallow slot, and is beneficial to be pressurized it；（4）Voltage stabilizing annular groove, and part is completely covered in the end face of graphite stationary ring
Cover spiral shallow slot so that stable air film and oil film, work are formed between spiral shallow slot, voltage stabilizing annular groove and graphite stationary ring end face
Stability is high, effectively strengthens sealing effectiveness；Due to sealing air film, small, low in energy consumption, the heat production of sealing surface friction on sealing surface be present
It is few, it can effectively extend sealing life；（5）The sealing surface requirement on machining accuracy of friction rotating ring and graphite stationary ring of the present utility model is not
Height, high yield rate, production cost is low, good in economic efficiency.
Brief description of the drawings
The utility model is described in further detail with reference to Figure of description：
Fig. 1 is semi-contact graphite seal device of the present utility model and the cross-sectional view after rotating shaft assembling；
Fig. 2 is the schematic diagram of the friction rotating ring of the utility model semi-contact graphite seal device vertically；
Fig. 3 is the cross-section structure signal of the friction rotating ring of semi-contact graphite seal device of the present utility model radially
Figure.
In figure：Rotating shaft 1, rub rotating ring 2, graphite stationary ring 3, O-ring seal 4, abrasive end face 5, inner ring surface 6, air inlet gap 7,
Lubricating cavity 8, spiral shallow slot 21, voltage stabilizing annular groove 22, cushion rubber annular groove 23, forward gap 24, afterbody gap 25.
Embodiment
Embodiment 1 as shown in Figure 1 to Figure 3, the semi-contact graphite seal device of the present embodiment, including the He of graphite stationary ring 3
The friction rotating ring 2 rotated with rotating shaft 1, inner ring surface 6 and the gap of rotating shaft 1 of the rotating ring 2 that rubs coordinate, the edge of inner ring surface 6 for the rotating ring 2 that rubs
Circumferentially disposed cushion rubber annular groove 23, the interior O-ring seal 4 that elastically deformable is set of cushion rubber annular groove 23, the O-ring seal 4 and the mistake of rotating shaft 1
It to be full of cooperation, on the one hand plays gearing so that on the other hand rotating shaft 1 seals with the high-speed rotation of dynamic friction rotating ring 2,
Prevent the lubricating oil in lubricating cavity 8 from being leaked from friction rotating ring 2 and the fit clearance of rotating shaft 1；The abrasive end face 5 of the friction rotating ring 2 with
The end face of graphite stationary ring 3 is in contact, and graphite stationary ring 3 is by spring（Not shown in figure）Carry out servo-actuated compensation, the inner side of graphite stationary ring 3
Gap coordinates to form air inlet gap 7 between anchor ring and rotating shaft 1, due to the setting of O-ring seal 4, friction rotating ring 2 and rotating shaft 1 it
Between gap be divided into forward gap 24 and afterbody gap 25, forward gap 24 and rotating shaft 1, the phase of lubricating cavity 8 in the outside of friction rotating ring 2
Logical, the air inlet gap 7 between afterbody gap 25 and graphite stationary ring 3 and rotating shaft 1 communicates, between forward gap 24 and afterbody gap 25
Sealed cushion rubber 4 is isolated.
Rub the uniform multiple mutually isostructural spiral shallow slots 21 of abrasive end face 5 of rotating ring 2, and each spiral shallow slot 21 is by friction side
Face 5 and the intersection of inner ring surface 6 stretch out along abrasive end face 5, so that spiral shallow slot 21 forms opening on inner ring surface 6, respectively
The hand of spiral of spiral shallow slot 21 is identical with the direction of rotation of rotating shaft 1, the 21 tapered setting of spiral shallow slot, the tail end of spiral shallow slot 21
Groove width be more than the groove width of its openend, the groove depth of the tail end of spiral shallow slot 21 is more than the groove depth of its openend, each spiral shallow slot 21
Groove depth by 3 μm of openend be incremented to tail end 12 μm；The abrasive end face 5 of friction rotating ring 3 is additionally provided with the voltage stabilizing annular groove of annular
22, the tail end of each spiral shallow slot 21 communicates with voltage stabilizing annular groove 22, so as to be connected between the tail end of each spiral shallow slot 21；Graphite is quiet
The external diameter that the external diameter of the end face of ring 3 is less than friction rotating ring abrasive end face 5 is set, and the external diameter of the end face of graphite stationary ring 3 is than voltage stabilizing annular groove
The 22 big 2mm of external diameter is set, should with the plane contact area for ensureing the end face of graphite stationary ring 3 between the rotating ring abrasive end face 5 that rubs
Voltage stabilizing annular groove 22 is coaxially disposed with friction rotating ring 2, and the internal diameter of voltage stabilizing annular groove 22 is more than the internal diameter setting of graphite stationary ring 3, regulation loop
The external diameter that the external diameter of groove 22 is less than graphite stationary ring 3 is set, and the internal diameter of the end face of graphite stationary ring 3 is equal to friction rotating ring abrasive end face 5
The half of internal diameter and the internal diameter sum of voltage stabilizing annular groove 22 is set, so that when friction rotating ring 2 and the assembling of graphite stationary ring 3, graphite stationary ring 3
Voltage stabilizing annular groove 22 is completely covered in end face, while the afterbody of spiral shallow slot 21 is covered by the end face of graphite stationary ring 3, spiral shallow slot 21
Front portion is in hollow out state.
In use, friction rotating ring 2 inner ring surface 6 and rotating shaft 1 between sealed cushion rubber 4 sealed, friction rotating ring 2 with turn
Axle 1 rotates, and the abrasive end face 5 for the rotating ring 1 that rubs keeps contacting with the end face of graphite stationary ring 3, in use, even if employing
O-ring seal 4 is sealed, and the lubricating oil in lubricating cavity 8 still has to be leaked between afterbody through forward gap 24, O-ring seal 4 on a small quantity
In gap 25 and air inlet gap 7 and produce accumulations, due to the rotation for the rotating ring 1 that rubs, spiral shallow slot 21 will rub rotating ring inner ring surface 6 and
Between rotating shaft 1 in afterbody gap 25, the lubricating oil of the air in air inlet gap 7 and accumulation be pumped into spiral shallow slot 21 and pressurize, then
Voltage stabilizing compression ring is formed in voltage stabilizing annular groove 22, so as to form stabilization between friction rotating ring abrasive end face 5 and the end face of graphite stationary ring 3
Contactless air film and oil film, it is combined with the flat seal between inactive state friction rotating ring 2 and graphite stationary ring 3, sealing effect
Fruit greatly enhances.
Obviously, above-described embodiment is only intended to clearly illustrate the utility model example, and is not to this reality
With the restriction of new embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And these
Belong to obvious changes or variations that spirit of the present utility model is amplified out still in the scope of protection of the utility model
Among.
Claims (6)
1. a kind of semi-contact graphite seal device, including：Graphite stationary ring and the friction rotating ring rotated with rotating shaft, the friction rotating ring
Inner ring surface and rotating shaft gap coordinate, the abrasive end face of the friction rotating ring is in contact with the end face of graphite stationary ring；Characterized in that,
The uniform multiple mutually isostructural spiral shallow slots of the abrasive end face, each spiral shallow slot by abrasive end face and inner ring surface intersection edge
Abrasive end face stretches out, so that spiral shallow slot forms opening on inner ring surface, the abrasive end face is provided with the regulation loop of annular
Groove, the tail end of each spiral shallow slot communicate with the voltage stabilizing annular groove, so as to be connected between the tail end of each spiral shallow slot；The regulation loop
Groove is coaxially disposed with the friction rotating ring, and the internal diameter of the voltage stabilizing annular groove is more than the internal diameter setting of the graphite stationary ring, described steady
The external diameter that the external diameter of pressure ring groove is less than the graphite stationary ring is set, so that when the friction rotating ring and graphite stationary ring assembling,
The voltage stabilizing annular groove is completely covered in the end face of the graphite stationary ring, while the afterbody of spiral shallow slot is covered by the end face of graphite stationary ring
Lid.
2. semi-contact graphite seal device according to claim 1, it is characterised in that the spiral shallow slot arrives along internal diameter
The hand of spiral of external diameter is opposite with the direction of rotation of the rotating shaft.
3. semi-contact graphite seal device according to claim 2, it is characterised in that the spiral shallow slot is set in enlarging
Put, the groove width of spiral shallow slot tail end is more than the groove width of its openend, and the groove depth of spiral shallow slot tail end is more than the groove depth of its openend.
4. semi-contact graphite seal device according to claim 3, it is characterised in that the inner ring surface of the friction rotating ring
Circumferentially arranged cushion rubber annular groove.
5. semi-contact graphite seal device according to claim 4, it is characterised in that outside the graphite stationary ring end face
The external diameter that footpath is less than the friction rotating ring abrasive end face is set, the external diameter of the external diameter of the graphite stationary ring end face than the voltage stabilizing annular groove
Big at least 2mm is set.
6. semi-contact graphite seal device according to claim 5, it is characterised in that the graphite stationary ring end face it is interior
Footpath is set no more than the half of friction rotating ring abrasive end face internal diameter and voltage stabilizing annular groove internal diameter sum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720753525.1U CN206889676U (en) | 2017-06-27 | 2017-06-27 | A kind of semi-contact graphite seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720753525.1U CN206889676U (en) | 2017-06-27 | 2017-06-27 | A kind of semi-contact graphite seal device |
Publications (1)
| Publication Number | Publication Date |
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| CN206889676U true CN206889676U (en) | 2018-01-16 |
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ID=61317104
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720753525.1U Active CN206889676U (en) | 2017-06-27 | 2017-06-27 | A kind of semi-contact graphite seal device |
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| CN (1) | CN206889676U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139921A (en) * | 2017-06-27 | 2019-01-04 | 中国航发常州兰翔机械有限责任公司 | A kind of semi-contact graphite seal device |
| CN112360795A (en) * | 2019-07-12 | 2021-02-12 | 中国航发常州兰翔机械有限责任公司 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
-
2017
- 2017-06-27 CN CN201720753525.1U patent/CN206889676U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139921A (en) * | 2017-06-27 | 2019-01-04 | 中国航发常州兰翔机械有限责任公司 | A kind of semi-contact graphite seal device |
| CN112360795A (en) * | 2019-07-12 | 2021-02-12 | 中国航发常州兰翔机械有限责任公司 | Easy-to-operate static lubricating oil sealing test device for front section of axial flow compressor |
| CN112360794A (en) * | 2019-07-12 | 2021-02-12 | 中国航发常州兰翔机械有限责任公司 | Working method of static lubricating oil sealing test device for front section of axial flow compressor |
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