CN209511114U - Diaphragm seal, fingertip sealing structure and double-shaft seal structure - Google Patents
Diaphragm seal, fingertip sealing structure and double-shaft seal structure Download PDFInfo
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- CN209511114U CN209511114U CN201920200807.8U CN201920200807U CN209511114U CN 209511114 U CN209511114 U CN 209511114U CN 201920200807 U CN201920200807 U CN 201920200807U CN 209511114 U CN209511114 U CN 209511114U
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Abstract
The utility model provides a kind of diaphragm seal, fingertip sealing structure and double-shaft seal structure, diaphragm seal includes main ring, several first finger tip beams and several second finger tip beams of annular, several first finger tip beams are arranged around the outer peripheral surface of main ring, first finger tip beam forms the first seal shoe far from one end of main ring, and the end face of several first seal shoes is combined into primary sealing area；Several second finger tip beams are arranged around the inner peripheral surface of main ring, and the second finger tip beam forms the second seal shoe far from one end of main ring, and the end face of several second seal shoes is combined into secondary sealing area.It is equipped with the sealing surface being made of finger tip beam by outer peripheral surface, the inner peripheral surface in diaphragm seal, diaphragm seal is can guarantee and the seal clearance between seal member is needed to be maintained in lesser range, ensure that preferable sealing effect；When this fingertip sealing structure is applied to double-shaft seal, the biggish radial deflection of tolerable shaft.
Description
Technical field
The utility model relates to a kind of diaphragm seal, in particular to a kind of Finger seal piece.
The utility model further relates to a kind of fingertip sealing structure using the diaphragm seal and double-shaft seal structure.
Background technique
In gas-turbine unit, sealing has great shadow to the performance of product, reliability, service life and maintainability
It rings.Currently, between two shafts, frequently with seal form be that comb tooth seals.As shown in Figure 1, two (i.e. first turn of shaft
Axis 200, the second shaft 300) between by seal cartridge 1,2 phase of labyrinth seal.Wherein, seal cartridge 1 is mounted on first turn
On axis 200, labyrinth 2 is mounted in the second shaft 300, and the sealing of comb tooth is formed between seal cartridge 1 and labyrinth 2.It is working
In the process, due to the amount of deflection of axis, centrifugal force deformation etc., the relatively radially displacement between two shafts can be bigger, and comb tooth seals
It is rigid seal form, it is necessary to assure labyrinth will not scratch to the matrix of seal cartridge.Therefore, between two shafts
The sealing of comb tooth needs to select bigger seal clearance, to bring bigger sealing leak.
One of preferable sealing structure of seal performance is fingertip sealing structure at present.But general fingertip sealing structure is usual
Be only used for uniaxial sealing, can not be applied between double shafts, especially when shaft revolving speed is very high, due to itself centrifugal force,
The interaction such as radial deflection of double shafts, seal clearance are difficult to control.
Utility model content
The purpose of this utility model is to provide a kind of diaphragm seal, fingertip sealing structure and double-shaft seal structures, to solve
Seal clearance between double shafts is difficult the problem of control.
To solve the above problems, the utility model the following technical schemes are provided:
The utility model provides a kind of diaphragm seal, the diaphragm seal include the main ring of annular, several first finger tip beams and
Several second finger tip beams, several first finger tip beams are arranged around the outer peripheral surface of the main ring, and the first finger tip beam is separate
One end of main ring forms the first seal shoe, and the end face of several first seal shoes is combined into primary sealing area；It is several described
Second finger tip beam is arranged around the inner peripheral surface of the main ring, and the second finger tip beam forms the second sealing far from one end of main ring
The end face of boots, several second seal shoes is combined into secondary sealing area.
In the technical scheme, the primary sealing area of the diaphragm seal is made of several first finger tip beams, primary sealing area with
One needs the sealing surface of seal member to form effective sealing surface, and the secondary sealing area of the diaphragm seal is by several second finger tip beam groups
At secondary sealing area needs the sealing surface of seal member to form effective sealing surface with another, makes diaphragm seal and two need sealing
It can guarantee lesser seal clearance between part, ensure that two sealing effects needed between seal member.
Preferably, the first gap is formed between the two neighboring first finger tip beam.
In the technical scheme, the first gap keeps the first finger tip beam movable in certain scope of activities.
Preferably, the second gap is formed between the two neighboring second finger tip beam.
In the technical scheme, the second gap keeps the second finger tip beam movable in certain scope of activities.
Preferably, the main ring is equipped at least one location hole, and the location hole with positioning pin for matching.
In the technical scheme, diaphragm seal is located in predeterminated position for matching with positioning pin by location hole.
Preferably, the quantity of the location hole is two, and two location holes are respectively first positioning hole, the second positioning
Hole；The center of circle of the first positioning hole to the center of circle of the second location hole is not equal to described around the circumferential angle of the main ring
Multiple of the one end that first finger tip beam or the second finger tip beam are connect with main ring around the circumferential angle of the main ring.
In the technical scheme, when several diaphragm seals are superimposed, positioning pin in fixation member is successively with first
Location hole, second location hole cooperate in turn, and the first finger tip beam of adjacent diaphragm seal is made to be staggered placement, and the of adjacent diaphragm seal
Two finger tip beams are staggered placement.
Preferably, be additionally provided with two groups of connecting holes on the main ring, two groups of connecting holes be respectively first group of connecting hole,
Second group of connecting hole, first group of connecting hole are opposite with second group of connecting hole relative to the position of the first positioning hole
It is identical in the position of the second location hole.
In the technical scheme, when diaphragm seal is positioned by first positioning hole, first group of connecting hole fixing seal is used
Piece；And when diaphragm seal is positioned by second location hole, using second group of connecting hole fixing seal piece, every group of connecting hole and one
Location hole matches.
The utility model also provides a kind of fingertip sealing structure, including two baffles and seal, the seal include
Several diaphragm seals as described in above technical scheme, several diaphragm seals along it is axially stacking together；Two baffles from
The seal clamps the seal along axial both ends, and several primary sealing areas are combined into the seal
First mating surface, several secondary sealing areas are combined into the second mating surface of the seal.
In the technical scheme, the first mating surface, the second mating surface need seal member mutually to seal cooperation with two respectively, refer to
Sharp sealing structure and two seal clearances needed between seal member can control in lesser range, can keep two need
Leakproofness between seal member.
Preferably, the main ring of the diaphragm seal is equipped at least one perforative connecting hole；The fingertip sealing structure
It further include at least one set of connector, the connector includes connection bolt and attaching nut, and the threaded rod of the connection bolt passes through
Wear connecting hole, two baffles of several diaphragm seals, the end of thread screw thread of the attaching nut and the connection bolt
Cooperation.
In the technical scheme, bolt and attaching nut are connected, two baffles are squeezed to the direction of seal, will be constituted
Several diaphragm seals of seal clamp.
Preferably, the fingertip sealing structure further includes the auxiliary seal ring to match with the connector, the auxiliary
For seal ring set on the threaded rod of the connection bolt, the auxiliary seal ring is set to the head, described of the connection bolt
Between baffle.
In the technical scheme, by the auxiliary seal ring, can reinforce connecting the leakproofness between bolt and baffle, thus
Improve the overall tightness of fingertip sealing structure.
Preferably, the main ring of the diaphragm seal is equipped at least one location hole；The fingertip sealing structure further includes
Positioning pin, the positioning pin are set to the baffle towards on the surface of seal, and the positioning pin is inserted into the location hole.
In the technical scheme, location hole is matched with the positioning pin on baffle, and diaphragm seal is located in predeterminated position.
Preferably, the quantity of the location hole is two, and two location holes are respectively first positioning hole, the second positioning
Hole；When several diaphragm seals are superimposed, the positioning pin is inserted into the first positioning hole or second of several diaphragm seals in turn
Location hole, the first finger tip beam of the diaphragm seal is set between two the first finger tip beams of the adjacent diaphragm seal, described close
Second finger tip beam of mounting is set between two the second finger tip beams of the adjacent diaphragm seal.
In the technical scheme, when several diaphragm seals are superimposed, positioning pin is inserted into the first positioning of several diaphragm seals in turn
Hole or second location hole make several diaphragm seals be staggered placement, to improve the seal being made of several diaphragm seals along diaphragm seal
Axial leakproofness.
The utility model also provides a kind of double-shaft seal structure, including first rotating shaft, the second shaft, fingertip sealing structure,
First bushing and the second bushing, the fingertip sealing structure is as described in above technical scheme, the baffle of the fingertip sealing structure
It is fixed in position；First bushing is mounted in the first rotating shaft, the inner peripheral surface of first bushing and the sealing
First mating face seal of body cooperates；Second bushing is mounted in second shaft, the outer peripheral surface of second bushing
Cooperate with the second mating face seal of the seal.
In the technical scheme, due to being Finger seal, the first finger tip between the first bushing, the second bushing and seal
Beam, the second finger tip beam " can follow " first rotating shaft, the second shaft radial deflection and reset, make the first bushing, the second bushing
Lesser gap is remained between seal, ensure that the sealing effect between first rotating shaft, the second shaft.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can any combination to get the utility model respectively compared with
Good example.
The positive effect of the utility model is:
Above-mentioned diaphragm seal, fingertip sealing structure and double-shaft seal structure are all provided with by outer peripheral surface, the inner peripheral surface in diaphragm seal
By the sealing surface being made of finger tip beam, makes the diaphragm seal and be set to two using the fingertip sealing structure of the diaphragm seal and need to seal
When between component, can guarantee diaphragm seal and the seal clearance between seal member needed to be maintained in lesser range, ensure that compared with
Good sealing effect；When this fingertip sealing structure is applied to double-shaft seal, in shaft rotation, it can remain lesser
Seal clearance, the biggish radial deflection of tolerable shaft.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of double-shaft seal structure in the prior art.
Fig. 2 is the structural schematic diagram of the utility model diaphragm seal.
Fig. 3 is the partial enlarged view of diaphragm seal shown in Fig. 2.
Fig. 4 is the structural schematic diagram of the utility model fingertip sealing structure.
Fig. 5 is the structural schematic diagram of the utility model double-shaft seal structure.
Fig. 6 is the partial enlarged view of double-shaft seal structure shown in fig. 5.
Description of symbols
First rotating shaft 200；Second shaft 300；
Seal cartridge 1, labyrinth 2；
Fingertip sealing structure 100；
Diaphragm seal 10, main ring 11, first positioning hole 111, second location hole 112, first group of connecting hole 113, second group
Connecting hole 114, the first finger tip beam 12, the first seal shoe 121, the second finger tip beam 13, the second seal shoe 131, primary sealing area 14,
Secondary sealing area 15, the first gap 16, the second gap 17；Baffle 20；Seal 30, the first mating surface 31, the second mating surface 32；
Connector 40 connects bolt 41, and threaded rod 411, head 412, attaching nut 42；Auxiliary seal ring 50；
First bushing 400；Second bushing 500.
Specific embodiment
The utility model is described in further detail with attached drawing combined with specific embodiments below, elaborates in the following description
More details are in order to fully understand the utility model, but the utility model obviously can be different from what this was described with a variety of
Other way is implemented, and those skilled in the art can be without prejudice to the utility model connotation according to practical application feelings
Condition makees similar popularization, deduces, therefore should not limit the protection scope of the utility model with the content of this specific embodiment.
As shown in Figure 2 to Figure 3, which includes the main ring 11 of annular, several first finger tip beams 12 and several the
Two finger tip beams 13, several first finger tip beams 12 are arranged around the outer peripheral surface of main ring 11, and the first finger tip beam 12 has flexibility, and first refers to
Sharp beam 12 forms the first seal shoe 121 far from one end of main ring 11, and it is close that the end face of several first seal shoes 121 is combined into first
Cover 14；Several second finger tip beams 13 are arranged around the inner peripheral surface of main ring 11, and the second finger tip beam 13 has flexibility, the second finger tip beam
13 one end far from main ring 11 form the second seal shoe 131, and the end face of several second seal shoes 131 is combined into secondary sealing area
15。
The primary sealing area 14 of the diaphragm seal 10 is in contact with the sealing surface of seal member is needed, and forms effective sealing surface.Tool
For body, the first seal shoe 121 of several first finger tip beams 12 is in contact with the sealing surface of seal member is needed, and forms sealing.
When needing seal member to when shifting close to finger tip beam direction, since the first finger tip beam 12 has flexibility, with it
First seal shoe 121 of contact also shifts, i.e. the first finger tip beam 12 " being pushed open ".When needing seal member to return to original position
When setting, the first finger tip beam 12 also returns to original position.This " following " behavior of first finger tip beam 12, ensure that worked
Cheng Zhong remains lesser gap, i.e., between the first seal shoe 121 of the first finger tip beam 12 and the sealing surface for needing seal member
It diaphragm seal 10 and needs to guarantee lesser seal clearance between seal member.
Wherein, as shown in figure 3, forming the first gap 16 between two neighboring first finger tip beam 12.First gap 16 makes
One finger tip beam 12 can be movable in certain scope of activities.
The secondary sealing area 15 of the diaphragm seal 10 is in contact with the sealing surface of seal member is needed, and forms effective sealing surface.Tool
For body, the second seal shoe 131 of several second finger tip beams 13 is in contact with the sealing surface of seal member is needed, and forms sealing.
When needing seal member to when shifting close to finger tip beam direction, since the second finger tip beam 13 has flexibility, with it
Second seal shoe 131 of contact also shifts, i.e. the second finger tip beam 13 " being pushed open ".When needing seal member to return to original position
When setting, the second finger tip beam 13 also returns to original position.This " following " behavior of second finger tip beam 13, ensure that worked
Cheng Zhong remains lesser gap, i.e., between the second seal shoe 131 of the second finger tip beam 13 and the sealing surface for needing seal member
It diaphragm seal 10 and needs to guarantee lesser seal clearance between seal member.
Wherein, as shown in figure 3, forming the second gap 17 between two neighboring second finger tip beam 13.Second gap 17 makes
Two finger tip beams 13 can be movable in certain scope of activities.
Primary sealing area 14, the secondary sealing area 15 of the diaphragm seal 10, need seal member mutually to seal cooperation with two respectively,
It needs to keep lesser gap between the sealing surface of seal member with two, ensure that two sealings needed between seal member
Property.
As shown in Fig. 2, setting on main ring 11, there are two location holes, and two location holes are respectively first positioning hole 111, second
Location hole 112, the two location holes are matched for positioning pin, and diaphragm seal 10 is made to be maintained at scheduled position.
Wherein, the preferable Position Design of two location holes are as follows: the center of circle of first positioning hole 111 to second location hole 112
The center of circle around one end that the circumferential angle of main ring 11 is connect not equal to the first finger tip beam 12 with main ring 11 around main ring 11
The multiple of circumferential angle.When several diaphragm seals 10 are superimposed, positioning pin is successively positioned with first positioning hole 111, second
Hole 112 cooperates in turn, and the first finger tip beam 12 of adjacent diaphragm seal 10 is made to be staggered placement.That is, the first finger tip beam of diaphragm seal 10
12 are placed between two the first finger tip beams 12 of adjacent diaphragm seal 10, are covered on the first gap 16.By the above-mentioned means,
Seal 30 is strengthened along axial leakproofness.
In order to make the second finger tip beam 13 that can also be staggered placement, the circle in the center of circle of first positioning hole 111 to second location hole 112
The heart is also not equal to the week of one end that the second finger tip beam 13 is connect with main ring 11 around main ring 11 around the circumferential angle of main ring 11
To the multiple of angle.When several diaphragm seals 10 are superimposed, positioning pin successively with first positioning hole 111, second location hole
112 cooperate in turn, and the second finger tip beam 13 of adjacent diaphragm seal 10 is made to be staggered placement.That is, the second finger tip beam 13 of diaphragm seal 10
It is placed between two the second finger tip beams 13 of adjacent diaphragm seal 10, is covered on the second gap 17.By the above-mentioned means, plus
Strong seal 30 is along axial leakproofness.
The quantity of above-mentioned location hole is two, and a location hole or multiple location holes actually also can be set.It is multiple fixed
Position hole is multiple predetermined positions of corresponding diaphragm seal 10, enables to be arranged in a staggered manner when multiple diaphragm seals 10 are superimposed, guarantees seal
30 along axial leakproofness.
As shown in Fig. 2, being additionally provided with several connecting holes on diaphragm seal 10, which makes diaphragm seal for being inserted into connector
10 are fixed on predetermined position.After several diaphragm seals 10 are superimposed, the connecting hole of several diaphragm seals 10 aligns, and is formed perforative
Hole enables connector that several diaphragm seals 10 to connect together.
In order to cooperate two location holes, the connecting hole on main ring 11 is divided into two groups of connecting holes, and two groups of connecting holes are respectively
First group of connecting hole, 113, second groups of connecting holes 114, position and the of first group of connecting hole 113 relative to first positioning hole 111
Two groups of connecting holes 114 are identical relative to the position of second location hole 112.When diaphragm seal 10 is positioned by first positioning hole 111,
Use first group of 113 fixing seal piece 10 of connecting hole；And when diaphragm seal 10 is positioned by second location hole 112, use second
Group 114 fixing seal piece 10 of connecting hole.
When several diaphragm seals 10 are superimposed, according to position needs, the location hole of corresponding position is inserted into same positioning pin
On, the connecting hole of several diaphragm seals 10 can form a perforative hole, pass through for connector, and several diaphragm seals 10 are connected to one
It rises.
Above-mentioned diaphragm seal 10 is formed into seal 30 along axially stacking together, the seal 30 and two baffles 20 form
Fingertip sealing structure 100, as shown in Figure 4.Two baffles 20 clamp seal 30 along axial both ends from seal 30, if
Dry primary sealing area 14 is combined into the first mating surface 31 of seal 30, and several secondary sealing areas 15 are combined into the of seal 30
Two mating surfaces 32.First mating surface 31, the second mating surface 32 need seal member mutually to seal cooperation with two respectively, refer to due to using
Point sealing, seal clearance can control in lesser range, to ensure that two leakproofness needed between seal member.
Location hole there are two setting on the main ring 11 of diaphragm seal 10, two location holes are respectively first positioning hole 111, second
Location hole 112.And the fingertip sealing structure 100 further includes positioning pin, positioning pin is set to table of the baffle 20 towards seal 30
On face, positioning pin is inserted into location hole.When several diaphragm seals 10 are superimposed, positioning pin is inserted into the first of several diaphragm seals 10 in turn
Location hole 111 or second location hole 112 make several diaphragm seals 10 be staggered placement.First finger tip beam 12 of diaphragm seal 10 is set to
Between two the first finger tip beams 12 of adjacent seals piece 10, the second finger tip beam 13 of diaphragm seal 10 is set to adjacent seals piece 10
Between two the second finger tip beams 13.
The quantity of above-mentioned location hole is two, and a location hole or multiple location holes actually also can be set.It is multiple fixed
Position hole is multiple predetermined positions of corresponding diaphragm seal 10, enables to be arranged in a staggered manner when multiple diaphragm seals 10 are superimposed, ensure that sealing
Body 30 is along axial leakproofness.
The fingertip sealing structure 100 further includes connector 40, and connector 40 includes connection bolt 41 and attaching nut 42, is connected
The threaded rod 411 of connecting bolt 41 run through several diaphragm seals 10 connecting hole, two baffles 20, attaching nut 42 with connect bolt 41
The end of thread be threadedly engaged.Bolt 41 and attaching nut 42 are connected, two baffles 20 are squeezed to the direction of seal 30, by structure
It is clamped at several diaphragm seals 10 of seal 30.
For the leakproofness for reinforcing the fingertip sealing structure 100, which further includes matching with connector 40
The auxiliary seal ring 50 of set, 50 sets of auxiliary seal ring is on the threaded rod 411 of connection bolt 41,50 company of being set to of auxiliary seal ring
Between the head 412 of connecting bolt 41, baffle 20.By the auxiliary seal ring 50, can reinforce connecting between bolt 41 and baffle 20
Leakproofness.It, can also be in connection spiral shell in addition to auxiliary seal ring 50 is set between the head 412 of connection bolt 41, baffle 20
Sealing ring is set between mother 42 and baffle 20, the leakproofness between attaching nut 42 and baffle 20 can be reinforced.
By using multiple connectors 40, the circumferential direction around diaphragm seal 10 is uniformly arranged, and connector 40 is made to utilize baffle 20
When being clamped to several diaphragm seals 10, the uniform force of several diaphragm seals 10, composed seal 30 is along axial sealing
Effect is good.
Above-mentioned fingertip sealing structure 100 is used for the sealing between two shafts, forms double-shaft seal structure, extremely such as Fig. 5
Shown in Fig. 6.The double-shaft seal structure, including first rotating shaft 200, the second shaft 300, fingertip sealing structure 100, the first bushing
400 and second bushing 500.
Wherein, the baffle 20 of fingertip sealing structure 100 is fixed in position, for example, static element can be fixed on baffle 20
On.First bushing 400 is mounted in first rotating shaft 200, the inner peripheral surface of the first bushing 400 and the first mating surface 31 of seal 30
Sealing cooperation；Second bushing 500 is mounted in the second shaft 300, and the outer peripheral surface of the second bushing 500 is matched with the second of seal 30
The sealing cooperation of conjunction face 32.Since the first mating surface 31 of the first bushing 400 and seal 30 forms effective sealing, the second bushing
500 form effective sealing with the second mating surface 32 of seal 30, to hinder lubricating oil from 200, second turns of first rotating shaft
It lets out between axis 300.
First rotating shaft 200, the second shaft 300 rotation when, even if first rotating shaft 200, the second shaft 300 generate it is biggish
Radial deflection, but due to being Finger seal, the first finger tip beam between the first bushing 400, the second bushing 500 and seal 30
12, the second finger tip beam 13 " can follow " first rotating shaft 200, the second shaft 300 radial deflection and reset, make the first bushing
400, lesser gap is remained between the second bushing 500 and seal 30, ensure that first rotating shaft 200, the second shaft 300
Between sealing effect.
Although the utility model is disclosed as above with preferred embodiment, its be not for limiting the utility model, it is any
Those skilled in the art without departing from the spirit and scope of the utility model, can make possible variation and modification.It is all
It is the content without departing from technical solutions of the utility model, made by the above technical examples according to the technical essence of the present invention
What modification, equivalent variations and modification, each falls within the protection scope that the utility model claims are defined.
Claims (12)
1. a kind of diaphragm seal, the diaphragm seal includes the main ring of annular, which is characterized in that the diaphragm seal further include:
Several first finger tip beams, several first finger tip beams are arranged around the outer peripheral surface of the main ring, the first finger tip beam
One end far from main ring forms the first seal shoe, and the end face of several first seal shoes is combined into primary sealing area；
Several second finger tip beams, several second finger tip beams are arranged around the inner peripheral surface of the main ring, the second finger tip beam
One end far from main ring forms the second seal shoe, and the end face of several second seal shoes is combined into secondary sealing area.
2. diaphragm seal according to claim 1, it is characterised in that: form first between the two neighboring first finger tip beam
Gap.
3. diaphragm seal according to claim 1, it is characterised in that: form second between the two neighboring second finger tip beam
Gap.
4. diaphragm seal according to claim 1, it is characterised in that: the main ring is equipped at least one location hole, institute
Location hole is stated for matching with positioning pin.
5. diaphragm seal according to claim 4, it is characterised in that: the quantity of the location hole is two, and two described fixed
Position hole is respectively first positioning hole, second location hole；The center of circle of the first positioning hole to the center of circle of the second location hole around
One end that the circumferential angle of the main ring is connect not equal to the first finger tip beam or the second finger tip beam with main ring is around described
The multiple of the circumferential angle of main ring.
6. diaphragm seal according to claim 5, it is characterised in that: two groups of connecting holes are additionally provided on the main ring, it is described
Two groups of connecting holes are respectively first group of connecting hole, second group of connecting hole, and first group of connecting hole is relative to first positioning
The position in hole and second group of connecting hole are identical relative to the position of the second location hole.
7. a kind of fingertip sealing structure, including two baffles, it is characterised in that: the fingertip sealing structure further includes seal,
The seal includes several diaphragm seals, and the diaphragm seal is as described in any one of claim 1 to 6, several diaphragm seal edges
It is axially stacking together；Two baffles clamp the seal along axial both ends from the seal, Ruo Gansuo
The first mating surface that primary sealing area is combined into the seal is stated, several secondary sealing areas are combined into the seal
Second mating surface.
8. fingertip sealing structure according to claim 7, it is characterised in that: the main ring of the diaphragm seal is equipped at least
One perforative connecting hole；The fingertip sealing structure further includes at least one set of connector, and the connector includes connection bolt
And attaching nut, the threaded rod of the connection bolt run through connecting hole, two baffles of several diaphragm seals, the company
The end of thread of connected nut and the connection bolt is threadedly engaged.
9. fingertip sealing structure according to claim 8, it is characterised in that: the fingertip sealing structure further include with it is described
The auxiliary seal ring that connector matches, for the auxiliary seal ring set on the threaded rod of the connection bolt, the auxiliary is close
Seal ring is set between the head of the connection bolt, the baffle.
10. fingertip sealing structure according to claim 7, it is characterised in that: the main ring of the diaphragm seal is equipped with extremely
A few location hole；The fingertip sealing structure further includes positioning pin, and the positioning pin is set to the baffle towards seal
Surface on, the positioning pin is inserted into the location hole.
11. fingertip sealing structure according to claim 10, it is characterised in that: the quantity of the location hole be two, two
A location hole is respectively first positioning hole, second location hole；When several diaphragm seals are superimposed, the positioning pin is in turn
It is inserted into the first positioning hole or second location hole of several diaphragm seals, the first finger tip beam of the diaphragm seal is set to adjacent institute
It states between two the first finger tip beams of diaphragm seal, the second finger tip beam of the diaphragm seal is set to two of the adjacent diaphragm seal
Between second finger tip beam.
12. a kind of double-shaft seal structure, including first rotating shaft, the second shaft, which is characterized in that the double-shaft seal structure is also wrapped
It includes:
Fingertip sealing structure, the fingertip sealing structure as described in any one of claim 7 to 11, the fingertip sealing structure
Baffle is fixed in position；
First bushing, first bushing are mounted in the first rotating shaft, the inner peripheral surface of first bushing and the sealing
First mating face seal of body cooperates；
Second bushing, second bushing are mounted in second shaft, the outer peripheral surface of second bushing and the sealing
Second mating face seal of body cooperates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920200807.8U CN209511114U (en) | 2019-02-15 | 2019-02-15 | Diaphragm seal, fingertip sealing structure and double-shaft seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920200807.8U CN209511114U (en) | 2019-02-15 | 2019-02-15 | Diaphragm seal, fingertip sealing structure and double-shaft seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209511114U true CN209511114U (en) | 2019-10-18 |
Family
ID=68204325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920200807.8U Active CN209511114U (en) | 2019-02-15 | 2019-02-15 | Diaphragm seal, fingertip sealing structure and double-shaft seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209511114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513592A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil piece end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
-
2019
- 2019-02-15 CN CN201920200807.8U patent/CN209511114U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513592A (en) * | 2021-05-20 | 2021-10-19 | 中国计量大学 | Foil piece end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
| CN113513592B (en) * | 2021-05-20 | 2023-10-20 | 中国计量大学 | Foil end face air film sealing structure with boot-shaped dynamic pressure flexible sealing dam |
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