CN208967035U - Ultra-low temperature surroundings rotary joint - Google Patents
Ultra-low temperature surroundings rotary joint Download PDFInfo
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- CN208967035U CN208967035U CN201821704033.4U CN201821704033U CN208967035U CN 208967035 U CN208967035 U CN 208967035U CN 201821704033 U CN201821704033 U CN 201821704033U CN 208967035 U CN208967035 U CN 208967035U
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- rolling ring
- flange
- ring
- interior
- discharge
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Abstract
The utility model discloses a kind of ultra-low temperature surroundings rotary joints, including interior rolling ring, outer rolling ring, neck bush, inlet flange and outlet(discharge) flange；The interior rolling ring is set in in outer rolling ring, and one end of the interior rolling ring is fixedly linked with inlet flange, and one end of the outer rolling ring is fixedly linked with outlet(discharge) flange；The interior rolling ring is a hollow shaft, and shaft section is in two stage steps shape；The outer rolling ring is an axle sleeve, and shaft section is inwardly in and the concave-convex matched three-level step of interior rolling ring shaft section；The inner surface of the just external rolling ring intermediate step in the outer surface of the outer diameter small end of the interior rolling ring is arranged, and the double steel ball raceway of same diameter is provided therebetween, is inside mounted on steel ball；The flexible gap of one fixed width is provided between the end face and inlet flange and/or outlet(discharge) flange of the neck bush.The neck bush of the rotary joint can control floating, under ultra-low temperature surroundings, can guarantee the compensation rate of sealing, realize the excellent sealing of transfer passage.
Description
Technical field
The utility model relates to a kind of rotary joints, particularly relate to a kind of ultra-low temperature surroundings rotary joint.
Background technique
It quickly realizes and is docked with by note equipment for convenience, complete the conveying of cryogenic media, guarantee to fill after docking
Unloading arm can freely drift about in a certain range with by note equipment, it is desirable that loading arm has the freedom degree of multiple directions, rotary joint
It exactly realizes the critical component of this function, and has good leakproofness during rotation, the low temperature stream such as LNG can be prevented
The leakage of body.The structure design of rotary joint has conclusive effect to its performance, and existing rotary joint is generally existing to be torn open
Dress is inconvenient, sealing ring is difficult to replace, compensates the problems such as not enough amount under ultra-low temperature surroundings.
Application No. is 201210464639.6 Chinese patent applications to disclose a kind of cryogenic swivel, including left method
Blue, right flange, left flanged joint inner ring form left-handed rotation member, and right flanged joint outer ring forms dextrorotation rotation member, left-handed transfer part
Part and dextrorotation rotation member can relative rotation, on the right side of left flange, on the left of on the outside of inner ring and outer ring between be formed with gap, gap peace
Equipped with nitrogen-sealed circle, nitrogen-sealed circle inner wall and inner ring are in sealing contact, and nitrogen-sealed circle left side connects with left flange seal
Touching, nitrogen-sealed circle right side and outer ring are in sealing contact.The nitrogen-sealed circle of the invention is arranged in left flange and inside and outside circle
Between, therefore do not need to dismantle inside and outside circle when replacement, left flange need to only be unclamped can carry out replacement nitrogen-sealed circle, solve
The inconvenient problem of the installation of nitrogen-sealed circle, disassembly.Disadvantage is that: the primary seal and secondary sealing that the invention uses, super
Larger contraction is generated under low temperature, obturator elasticity is deteriorated, compensates without special measure to the contraction of obturator, very
It is easy to appear leakage.
Summary of the invention
The purpose of this utility model is to provide a kind of ultra-low temperature surroundings rotary joints that low temp compensating performance is good.
To achieve the above object, ultra-low temperature surroundings rotary joint designed by the utility model, including interior rolling ring, outer rolling
Circle, neck bush, inlet flange and outlet(discharge) flange；The interior rolling ring be set in in outer rolling ring, one end of the interior rolling ring with enter
Mouth flange is fixedly linked, and one end of the outer rolling ring is fixedly linked with outlet(discharge) flange；The interior rolling ring is a hollow shaft, and axis is cut
Face is in two stage steps shape；The outer rolling ring is an axle sleeve, and shaft section is inwardly in and the concave-convex matched three-level of interior rolling ring shaft section
Step；The inner surface of the just external rolling ring intermediate step in the outer surface of the outer diameter small end of the interior rolling ring is arranged, therebetween
It is provided with the double steel ball raceway of same diameter, steel ball is mounted in steel ball raceway described in every row, forms double-row bearing
Structure；It is provided with the first static seal groove between the outer rolling ring and outlet(discharge) flange, is mounted therein with the first static sealing ring；It is described
It is provided with the second static seal groove between the shoulder of the internal diameter smallest end of the end face and outer rolling ring of the outer diameter small end of interior rolling ring,
Second static sealing ring is inside installed；The neck bush is arranged in the inside of interior rolling ring, both ends and inlet flange, outlet(discharge) flange it
Between be respectively arranged with the first dynamic sealing groove, be separately installed with the first dynamic seal ring in each first dynamic sealing groove；It is described
The flexible gap of one fixed width is provided between the end face and inlet flange and/or outlet(discharge) flange of neck bush；The outer rolling ring
There are two grooves for setting between internal diameter most big end and inlet flange, are the second dynamic sealing groove positioned at inner ring, are mounted therein with
Second dynamic seal ring；It is dustband groove positioned at outer ring, is mounted therein with dustband；The interior rolling ring, outer rolling ring, entrance method
It is machined with nitrogen circulation passage inside blue, outlet(discharge) flange, is provided on the inlet flange and/or outlet(discharge) flange and circulates with nitrogen
The nitrogen connector that channel is connected.
Preferably, the outboard end of the neck bush is provided with the inside of defining flange, the interior rolling ring and/or outer rolling ring
Limited ring groove is provided at the position opposite with defining flange of end, the defining flange is stuck in limited ring groove to neck bush shape
At limit, in order to which the installation of neck bush positions.More preferably, the limited ring groove is arranged in what interior rolling ring was connected with inlet flange
On the inside of one end, the defining flange is arranged on the outside of one end that neck bush is connected with inlet flange.
Preferably, the outer rolling ring corresponds to every row's steel ball raceway and is provided with steel ball installation screw for installing steel ball,
Steel ball mounting screw is provided in the steel ball installation screw.
Preferably, toroidal cavity is provided between the middle part of the neck bush and interior rolling ring.
Preferably, the flexible gap setting is between the end face and outlet(discharge) flange of neck bush.
Preferably, the shoulder of the internal diameter smallest end of the just external rolling ring in the end face of the outer diameter small end of the interior rolling ring, it is described
Inner surface of the outer diameter of interior rolling ring compared with the internal diameter most big end of the just external rolling ring in the outer surface of big end.
Preferably, the outer diameter of the interior rolling ring passes through the mounting surface of flanged joint screw and inlet flange compared with the end face of big end
It is fixedly linked, the end face of the internal diameter smallest end of the outer rolling ring passes through the mounting surface stationary phase of flanged joint screw and outlet(discharge) flange
Even.
Compared with prior art, the utility model has the beneficial effects that: 1) neck bush of the rotary joint can control it is floating
It is dynamic, under ultra-low temperature surroundings, when even structural member and sealing element are shunk, it can equally guarantee the compensation rate of sealing, it is real
The good sealing property of existing transfer passage；2) most of sealing ring is arranged on flange mounting surface, is convenient in the course of work to close
The replacement of seal；3) structure that rotating part is coupled using double-row bearing and step, structure is simple, while can guarantee good
Sealing performance.
Detailed description of the invention
Fig. 1 is ultra-low temperature surroundings rotary joint designed by the utility model along axial schematic cross-sectional view.
Fig. 2 is the enlarged diagram in Fig. 1 at A.
Wherein: interior rolling ring 1, outer rolling ring 2, inlet flange 3, outlet(discharge) flange 4, neck bush 5, the first dynamic seal ring 6, second are dynamic
Sealing ring 7, dustband 8, the first static sealing ring 9, the second static sealing ring 10, steel ball 11, steel ball mounting screw 12, nitrogen connector
13, flanged joint screw 14, limited ring groove 15, defining flange 16, flexible gap 17, toroidal cavity 18
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Fig. 1~2, ultra-low temperature surroundings rotary joint designed by the utility model, including interior rolling ring 1, outer rolling
Circle 2, inlet flange 3, outlet(discharge) flange 4 and neck bush 5.
Interior rolling ring 1 is set in in outer rolling ring 2, and one end and the inlet flange 3 of interior rolling ring 1 are fixedly linked, and the one of outer rolling ring 2
End is fixedly linked with outlet(discharge) flange 4.
Interior rolling ring 1 is a hollow shaft, and shaft section is in two stage steps shape (transversally L-shaped).Outer rolling ring 2 is an axle sleeve, axis
Section is inwardly in and the concave-convex matched three-level step of interior 1 shaft section of rolling ring.The end face face of the outer diameter small end of interior rolling ring 1
The shoulder of the internal diameter smallest end of (i.e. setting face-to-face) outer rolling ring 2, the outer diameter of interior rolling ring 1 is compared with the just external rolling ring in the outer surface of big end
The inner surface of 2 internal diameter most big end.
The outer diameter of interior rolling ring 1 passes through the mounting surface stationary phase of flanged joint screw 14 and inlet flange 3 compared with the end face of big end
Even, the end face of the internal diameter smallest end of outer rolling ring 2 is fixedly linked by flanged joint screw 14 and the mounting surface of outlet(discharge) flange 4.
The inner surface of just external 2 intermediate step of rolling ring in the outer surface of the outer diameter small end of interior rolling ring 1 is arranged, and sets therebetween
It is equipped with the double steel ball raceway of same diameter, steel ball 11 is mounted in every row's steel ball raceway, forms double-row bearing structure.
The corresponding every row's steel ball raceway of outer rolling ring 2 is provided with 11 installation screw of steel ball for installing steel ball 11,11 installation screw of steel ball
Internal screw thread is connected with steel ball mounting screw 12.
It is provided with the first static seal groove between outer rolling ring 2 and outlet(discharge) flange 4, is mounted therein with the first static sealing ring 9.
It is quiet that second is provided between the shoulder of the internal diameter smallest end of the end face and outer rolling ring 2 of the outer diameter small end of interior rolling ring 1
Sealed groove is mounted therein with the second static sealing ring 10.
The inside of interior rolling ring 1 is arranged in neck bush 5, is respectively arranged between both ends and inlet flange 3, outlet(discharge) flange 4
First dynamic sealing groove is separately installed with the first dynamic seal ring 6 in each first dynamic sealing groove.
The flexible gap 17 of one fixed width is provided between the end face and outlet(discharge) flange 4 of neck bush 5.During the work time,
Neck bush 5 can control floating, increase the compensation surplus shunk at low ambient temperatures to o-ring groove width.
Setting is there are two groove between the internal diameter most big end and inlet flange 3 of outer rolling ring 2, positioned at inner ring be second move it is close
Groove is sealed, the second dynamic seal ring 7 is mounted therein with, to prevent helium leak.It is 8 groove of dustband positioned at outer ring, interior peace
Equipped with dustband 8, avoid in harsh environment the particulate matters such as dust enter inside rotary joint, damage sealing ring.
Interior rolling ring 1, inlet flange 3, is machined with nitrogen circulation passage, inlet flange 3 inside outlet(discharge) flange 4 at outer rolling ring 2
And/or the nitrogen connector 13 being connected with nitrogen circulation passage is provided on outlet(discharge) flange 4, it is connect by nitrogen connector 13 to rotation
The nitrogen of head input certain pressure guarantees that nitrogen is filled between the component relatively rotated in the course of work, improves leakproofness, and prevent
The only icing under ultra-low temperature surroundings.
Be provided with defining flange 16 on the outside of one end that neck bush 5 is connected with inlet flange 3, interior rolling ring 1 with inlet flange 3
Limited ring groove 15 is provided at the position opposite with defining flange 16 on the inside of connected one end, defining flange 16 is stuck in stop collar
Neck bush 5 is formed in slot 15 and is limited, in order to which the installation of neck bush 5 positions.
Toroidal cavity 18 is provided between the middle part of neck bush 5 and interior rolling ring 1, one side can be used as gas passage, separately
On the one hand it can reduce connector weight.
The neck bush of the rotary joint can control floating, and under ultra-low temperature surroundings, even structural member and sealing element occur
When contraction, it can equally guarantee the compensation rate of sealing, realize the good sealing property of transfer passage.
Claims (8)
1. a kind of ultra-low temperature surroundings rotary joint, including interior rolling ring (1), outer rolling ring (2), inlet flange (3), outlet(discharge) flange
(4) and neck bush (5)；It is characterized by:
The interior rolling ring (1) is set in, one end of the interior rolling ring (1) and inlet flange (3) stationary phase interior with outer rolling ring (2)
Even, one end of the outer rolling ring (2) is fixedly linked with outlet(discharge) flange (4)；The interior rolling ring (1) is a hollow shaft, shaft section
In two stage steps shape；The outer rolling ring (2) is an axle sleeve, and shaft section is inwardly in matched with interior rolling ring (1) shaft section bumps
Three-level step；
The inner surface of just external rolling ring (2) intermediate step in the outer surface of the outer diameter small end of the interior rolling ring (1) is arranged, the two it
Between be provided with the double steel ball raceway of same diameter, be mounted on steel ball (11) in steel ball raceway described in every row, form double rolling
Pearl bearing arrangement；
It is provided with the first static seal groove between the outer rolling ring (2) and outlet(discharge) flange (4), is mounted therein with the first static sealing ring
(9)；Is provided between the shoulder of the internal diameter smallest end of the end face and outer rolling ring (2) of the outer diameter small end of the interior rolling ring (1)
Two static seal grooves are mounted therein with the second static sealing ring (10)；
The neck bush (5), which is arranged between the inside of interior rolling ring (1), both ends and inlet flange (3), outlet(discharge) flange (4), divides
It is not provided with the first dynamic sealing groove, is separately installed with the first dynamic seal ring (6) in each first dynamic sealing groove；In described
The flexible gap (17) of one fixed width is provided between the end face and inlet flange (3) and/or outlet(discharge) flange (4) of bushing (5)；
There are two grooves for setting between the internal diameter most big end and inlet flange (3) of the outer rolling ring (2), are second positioned at inner ring
Dynamic sealing groove is mounted therein with the second dynamic seal ring (7)；It is dustband (8) groove positioned at outer ring, is mounted therein with dust-proof
It encloses (8)；
The interior rolling ring (1), outer rolling ring (2), inlet flange (3), outlet(discharge) flange (4) inside are machined with nitrogen circulation passage, institute
State the nitrogen connector (13) for being provided on inlet flange (3) and/or outlet(discharge) flange (4) and being connected with nitrogen circulation passage.
2. ultra-low temperature surroundings rotary joint according to claim 1, it is characterised in that: the outside of the neck bush (5)
End is provided with defining flange (16), medial end and defining flange (16) phase of the interior rolling ring (1) and/or outer rolling ring (2)
Pair position at be provided with limited ring groove (15), the defining flange (16) is stuck in limited ring groove (15) to neck bush (5) shape
At limit.
3. ultra-low temperature surroundings rotary joint according to claim 2, it is characterised in that: limited ring groove (15) setting
On the inside of one end that interior rolling ring (1) is connected with inlet flange (3), the defining flange (16) is arranged in neck bush (5) and entrance
On the outside of the connected one end of flange (3).
4. ultra-low temperature surroundings rotary joint according to claim 1, it is characterised in that: the outer rolling ring (2) is corresponding every
Row's steel ball raceway is provided with steel ball (11) installation screw for installing steel ball (11), sets in steel ball (11) installation screw
It is equipped with steel ball mounting screw (12).
5. ultra-low temperature surroundings rotary joint according to claim 1, it is characterised in that: the middle part of the neck bush (5)
Toroidal cavity (18) are provided between interior rolling ring (1).
6. ultra-low temperature surroundings rotary joint according to any one of claims 1 to 5, it is characterised in that: described flexible
Gap (17) is arranged between the end face and outlet(discharge) flange (4) of neck bush (5).
7. ultra-low temperature surroundings rotary joint according to any one of claims 1 to 5, it is characterised in that: the interior rolling
Enclose the shoulder of the internal diameter smallest end of the just external rolling ring (2) in end face of the outer diameter small end of (1), the outer diameter of the interior rolling ring (1) compared with
The inner surface of the internal diameter most big end of the just external rolling ring (2) in the outer surface of big end.
8. ultra-low temperature surroundings rotary joint according to any one of claims 1 to 5, it is characterised in that: the interior rolling
The outer diameter of circle (1) is fixedly linked compared with the end face of big end by flanged joint screw (14) and the mounting surface of inlet flange (3), described
The end face of the internal diameter smallest end of outer rolling ring (2) is fixedly linked by flanged joint screw (14) and the mounting surface of outlet(discharge) flange (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821704033.4U CN208967035U (en) | 2018-10-19 | 2018-10-19 | Ultra-low temperature surroundings rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821704033.4U CN208967035U (en) | 2018-10-19 | 2018-10-19 | Ultra-low temperature surroundings rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208967035U true CN208967035U (en) | 2019-06-11 |
Family
ID=66759643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821704033.4U Active CN208967035U (en) | 2018-10-19 | 2018-10-19 | Ultra-low temperature surroundings rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208967035U (en) |
-
2018
- 2018-10-19 CN CN201821704033.4U patent/CN208967035U/en active Active
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