CN209278491U - A kind of airtight shafting of the rotation of end face seal - Google Patents
A kind of airtight shafting of the rotation of end face seal Download PDFInfo
- Publication number
- CN209278491U CN209278491U CN201821889182.2U CN201821889182U CN209278491U CN 209278491 U CN209278491 U CN 209278491U CN 201821889182 U CN201821889182 U CN 201821889182U CN 209278491 U CN209278491 U CN 209278491U
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- bearing
- airtight
- seal
- face
- rotation
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Abstract
The utility model relates to a kind of airtight shaftings of the rotation of end face seal, and rotating airtight shafting includes first rotating part as rotary shaft, and rotation is set on the second rotating part outside the first rotating part.First rotating part has cavity to be connected with air-tight cavity in the axial direction with the second rotating part, realizes rotatory sealing by the way that dynamic seal ring is arranged in the groove of the first rotating part axial end face.Another end face of dynamic seal ring axial direction is contacted with the second rotating part, and hermetically sealed purpose is reached by being compressed axially.Such sealing means structure is simple, and size is smaller, sealed reliable, and airtight gas can effectively be avoided to leak.
Description
Technical field
The invention belongs to the design of dynamic sealing cabin, it is related to a kind of airtight shafting of rotation of end face seal and using the shafting
Dynamic sealing cabin.
Background technique
Certain airborne photoelectric products need to carry out gas-tight design, need to carry out nitrogen charging in interiors of products and reach airtight requirement.By
There are some rotatable parts in product, the space between rotatable parts is connected to air-tight chamber, it is therefore desirable to rotary axis
Inside and outside gas communicating questions when rotatable parts rotate are solved using encapsulation scheme.
Summary of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of airtight shafting of the rotation of end face seal, and
Use the dynamic sealing cabin of the shafting.
Technical solution
A kind of airtight shafting of the rotation of end face seal, it is characterised in that including first annular seal space 1, the second seal chamber 4, bearing
Inner seat 2, bearing outer seat 3, bearing internal gland 5, bearing outer press cover 6, bearing 7 and dynamic seal ring 8；By first annular seal space 1, with first
The co-axially fixed bearing inner seat 2 of seal chamber and bearing internal gland 5 constitute the first rotating part；It is close with second by the second seal chamber 4
It seals the co-axially fixed bearing outer seat 3 of chamber and bearing outer press cover 6 constitutes the second rotating part；Bearing inner seat 2 and bearing outer seat 3 connect
It is between the two bearing 7 between first annular seal space 1 and the second seal chamber 4；Groove between bearing inner seat 2 and bearing outer seat 3
Dynamic seal ring 8 is placed, another the axial end face of dynamic seal ring 8 is contacted with the bearing outer seat 3 of the second rotating part；Bearing outer press cover
The outer seat 3 of 6 fixing bearings, 5 fixing bearing inner seat 2 of bearing internal gland.
Between first rotating part and the second rotating part there is axial cavity to be connected to air-tight cavity, by the first rotation
Axial end face design groove in part places dynamic seal ring to realize that rotation is airtight, another axial end face of dynamic seal ring with second turn
Dynamic part contacts, and hermetically sealed purpose is reached by being compressed axially.
The axial end face contact surface of the bearing inner seat 2 and bearing outer seat 3 and dynamic seal ring 8 is rough surface.
The radial side of the dynamic seal ring 8 is equipped with U-shaped opening.
The annular opening of the dynamic seal ring side big towards dynamic seal ring two sides gas pressure.
Metal energy storage spring is provided in the U-shaped of the dynamic seal ring 8.
Beneficial effect
A kind of airtight shafting of rotation of end face seal proposed by the present invention, rotating airtight shafting includes one as rotary shaft
The first rotating part, and rotation is set on the second rotating part outside the first rotating part.First rotating part with
Second rotating part has cavity to be connected with air-tight cavity in the axial direction, by the groove of the first rotating part axial end face
Dynamic seal ring is set to realize rotatory sealing.Another end face of dynamic seal ring axial direction is contacted with the second rotating part, passes through axis
Reach hermetically sealed purpose to compression.Such sealing means structure is simple, and size is smaller, sealed reliable, can effectively avoid
Airtight gas leakage.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the airtight shafting of rotation of end face seal of the present invention；
Fig. 2 is partial enlarged view.
In figure, 1, first annular seal space, 2, bearing inner seat, 3, bearing outer seat, the 4, second seal chamber, 5, bearing internal gland, 6,
Bearing outer press cover, 7, bearing, 8, dynamic seal ring.
Specific embodiment
Now in conjunction with embodiment, attached drawing, the invention will be further described:
Please refer to Fig. 1 and Fig. 2, wherein Fig. 1 is that a kind of airtight shafting one of rotation of end face seal of the present invention is preferably real
Apply the cross-sectional view of mode.The present invention provides a kind of airtight shaftings of the rotation of end face seal, which is characterized in that close including 1, first
Seal chamber, 2, bearing inner seat, 3, bearing outer seat, the 4, second seal chamber, 5, bearing internal gland, 6, bearing outer press cover, 7, bearing, 8, dynamic
Sealing ring, which is characterized in that the first rotating part includes first annular seal space 1, with the co-axially fixed bearing inner seat 2 of first annular seal space
With bearing internal gland 5.Second rotating part includes the second seal chamber 4, with the co-axially fixed bearing outer seat 3 of the second seal chamber and axis
Hold outer press cover 6.First annular seal space 1 is connected to the second seal chamber 4 by the axial hole at 2 center of bearing inner seat.Described first is close
Inflated with nitrogen is as sealing gas in envelope chamber 1 and the second seal chamber 4.
The bearing inner seat 2 and bearing outer seat 3 is axial there are cavity, and it is dynamic that groove placement is arranged in the bearing inner seat 2
Sealing ring 8, another the axial end face of dynamic seal ring 8 contact with the second rotating part, are reached by being compressed axially gas-tight seal.
The radial side of dynamic seal ring 8 is equipped with U-shaped opening, and the U-shaped opening of the dynamic seal ring is towards inside first annular seal space.
The dynamic seal ring 8 is the pressure assisted seal device for having polytetrafluoroethylene (PTFE) collet, wherein especially dress
The standby metal energy storage spring for making the U-shaped opening keep expansion trend, when dynamic seal ring is mounted in sealed groove, spring by
Pressure is so that dynamic seal ring is close to bearing inner seat and bearing outer seat end face, guarantee sealing effect.Bearing inner seat 2 and bearing outer seat 3 with
The axial end face contact surface of dynamic seal ring 8 need to improve surface roughness, to reduce the dynamic seal ring jacket material corresponding thereto
Abrasion, and the chance for generating leakage path is reduced, recommendation best surface roughness is 0.8Ra or more.
Between the bearing inner seat 2 and bearing outer seat 3 depth of groove according to dynamic seal ring axial dimension and material into
Row design guarantees that the decrement of dynamic seal ring after installing reaches 8%~18%.
The bearing inner seat 2 and the contact surface of first annular seal space 1 are end face static seal, the bearing outer seat 3 and the
The contact surface of two seal chambers 4 is end face static seal, and seal groove is arranged in bearing inner seat 2 and bearing outer seat 3, installs conductive rubber strip
Realize static seal.
A kind of airtight shafting of the rotation of end face seal described in present embodiment, such sealing means structure is simple, size
Smaller, sealed reliable can effectively avoid airtight gas from leaking.
Claims (5)
1. a kind of airtight shafting of the rotation of end face seal, it is characterised in that including first annular seal space (1), the second seal chamber (4), axis
Hold inner seat (2), bearing outer seat (3), bearing internal gland (5), bearing outer press cover (6), bearing (7) and dynamic seal ring (8)；By first
Seal chamber (1) constitutes the first rotating part with the co-axially fixed bearing inner seat of first annular seal space (2) and bearing internal gland (5)；By
Second seal chamber (4) constitutes the second rotation section with the co-axially fixed bearing outer seat of the second seal chamber (3) and bearing outer press cover (6)
Point；Bearing inner seat (2) and bearing outer seat (3) are connected between first annular seal space (1) and the second seal chamber (4), between the two for
Bearing (7)；Groove between bearing inner seat (2) and bearing outer seat (3) places dynamic seal ring (8), and dynamic seal ring (8) is axial another
A end face is contacted with the bearing outer seat (3) of the second rotating part；The outer seat (3) of bearing outer press cover (6) fixing bearing, bearing internal gland
(5) fixing bearing inner seat (2).
2. the airtight shafting of the rotation of end face seal according to claim 1, it is characterised in that: the bearing inner seat (2) and axis
The axial end face contact surface for holding outer seat (3) and dynamic seal ring (8) is rough surface.
3. the airtight shafting of the rotation of end face seal according to claim 1, it is characterised in that: the dynamic seal ring (8) is radial
Side is equipped with U-shaped opening.
4. the airtight shafting of the rotation of end face seal according to claim 1 or claim 2, it is characterised in that: the ring of the dynamic seal ring
The shape opening side big towards dynamic seal ring two sides gas pressure.
5. the airtight shafting of the rotation of end face seal according to claim 1 or claim 2, it is characterised in that: the dynamic seal ring (8)
U-shaped in be provided with metal energy storage spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821889182.2U CN209278491U (en) | 2018-11-16 | 2018-11-16 | A kind of airtight shafting of the rotation of end face seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821889182.2U CN209278491U (en) | 2018-11-16 | 2018-11-16 | A kind of airtight shafting of the rotation of end face seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209278491U true CN209278491U (en) | 2019-08-20 |
Family
ID=67601431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821889182.2U Active CN209278491U (en) | 2018-11-16 | 2018-11-16 | A kind of airtight shafting of the rotation of end face seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209278491U (en) |
-
2018
- 2018-11-16 CN CN201821889182.2U patent/CN209278491U/en active Active
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