CN104405982A - Rotary joint for LNG (Liquefied Natural Gas) filling arm - Google Patents
Rotary joint for LNG (Liquefied Natural Gas) filling arm Download PDFInfo
- Publication number
- CN104405982A CN104405982A CN201410720012.1A CN201410720012A CN104405982A CN 104405982 A CN104405982 A CN 104405982A CN 201410720012 A CN201410720012 A CN 201410720012A CN 104405982 A CN104405982 A CN 104405982A
- Authority
- CN
- China
- Prior art keywords
- ring
- outside circle
- outer ring
- swivel joint
- inner ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a rotary joint for an LNG (Liquefied Natural Gas) filling arm. The rotary joint comprises a rolling ball bearing; a left end flange and a right end flange are fixed at two ends of the rolling ball bearing respectively; the rolling ball bearing comprises an inner ring, a left outer ring and a right outer ring; a steel ball raceway which is formed between the inner ring and the left outer ring and a steel ball raceway which is formed between the inner ring and the right outer ring are formed in a staggered mode; an inner lining is arranged in the inner ring. Compared with the traditional rotary joint, the inner lining which is arranged in the rotary joint for the LNG filling arm can float laterally and accordingly the compensation on the width of a sealing ring groove is increased; an outer ring is divided into the left outer ring and the right outer ring, an annular groove which is used for performing installation limiting is formed between the left outer ring and the right outer ring, and accordingly the coaxality of the left raceway and the right raceway can be ensured; the steel ball raceway formed between the left outer ring and the inner ring and the steel ball raceway formed between the right outer ring and the inner ring are formed in a staggered mode and accordingly the capacity of the rotary joint for bearing the bending moment is increased.
Description
Technical field
The present invention relates to a kind of parts of cryogen conveying equipment, be specifically related to a kind of LNG filling arm swivel joint.
Background technique
Fluid assembly and disassembly arm is divided into land fluid assembly and disassembly arm and ship fluid handling arm two kinds, conveniently realize quickly and docking by note equipment, and loading arm freely can be drifted about in certain scope with by note equipment after docking, require that loading arm has the degrees of freedom of multiple directions, swivel joint is exactly the critical component realizing this function, and in rotation process, there is good sealing, the leakage of the cryogens such as LNG can be prevented.The structural design of swivel joint has conclusive effect to its performance, raceway between existing swivel joint inner ring and outer ring adopts and designs side by side, the ability of bearing moment of flexure is poor, and dismounting is inconvenient, therefore a kind of compact structure is designed, bear moment of flexure ability strong, easy-disassembling-assembling swivel joint seems particularly necessary.
Summary of the invention
The object of this invention is to provide a kind of LNG filling arm swivel joint, the raceway solved in existing swivel joint between inner ring and outer ring adopts and designs side by side, and the ability of bearing moment of flexure is poor, and the defect of dismounting inconvenience.
LNG filling arm swivel joint provided by the present invention, comprise a ball bearing, the two ends of described ball bearing fix a left end flange and a right-hand member flange respectively;
Described ball bearing comprises inner ring, left outside circle and right outside circle, the steel ball raceway between described inner ring and described left outside circle and between the steel ball raceway between described inner ring and described right outside circle for being crisscross arranged;
Neck bush is provided with in described inner ring.
In described swivel joint, limited ring groove is provided with, to ensure the alignment of left steel ball raceway (the steel ball raceway between left outside circle and inner ring) and right steel ball raceway (the steel ball raceway between right outside circle and inner ring) between described left outside circle and described right outside circle.
In described swivel joint, described neck bush and be equipped with dynamic seal ring between described left end flange and described right-hand member flange, owing to being provided with less fit up gap in described neck bush, inside is common to the nitrogen of lubrication, so float in left and right, to ensure that dynamic seal ring circumference bears consistent impacting force.
In described swivel joint, between described left outside circle and described right outside circle, be provided with static sealing ring.
In described swivel joint, dynamic seal ring and dust ring is provided with between described left outside circle and described left end flange, described dynamic seal ring can prevent helium leak, and described dust ring can to avoid in rugged environment the particulate matters such as dust to enter swivel joint inside, damages seal ring.
In described swivel joint, between described right outside circle and described right-hand member flange, be provided with static sealing ring.
Compared with traditional swivel joint, the neck bush that LNG of the present invention annotates in arm swivel joint can float left and right, adds the compensation rate to o-ring groove width; And outer ring is divided into left outside circle and right outside circle, be provided with the annular groove of mounting limit between left outside circle and right outside circle, the alignment of left and right raceway can be ensured; Left outside circle, steel ball raceway between right outside circle and inner ring stagger mutually, add the ability that swivel joint bears moment of flexure.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of LNG of the present invention filling arm swivel joint.
In figure, each mark is as follows:
1 inner ring, 2 right outside circles, 3 left outside circles, 4 neck bushs, 5 static sealing ring I, 6 static sealing ring II, 7 dust rings, 8 left end flanges, 9 right-hand member flanges, 10 dynamic seal ring I, 11 dynamic seal ring II, 12 screws, 13 spring washers, 14 steel balls, 15 limited ring grooves.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but the present invention is not limited to following examples.
As shown in Figure 1, for the sectional drawing of LNG filling arm swivel joint of the present invention, it comprises a ball bearing, the two ends of this ball bearing fix a left end flange 8 and a right-hand member flange 9 respectively, and being connected and fixed by screw 12, and screw 12 and be equipped with spring washer 13 between left end flange 8 and right-hand member flange 9.Ball bearing in the present invention comprises inner ring 1, left outside circle 3 and right outside circle 2, and for being crisscross arranged between the steel ball raceway (being made up of steel ball) of the steel ball raceway (being made up of steel ball 14) between inner ring 1 and left outside circle 3 between inner ring 1 and right outside circle 2, add the ability that swivel joint bears moment of flexure.Static sealing ring II6 is provided with between left outside circle 3 and right outside circle 2, dynamic seal ring I10 and dust ring 7 is provided with between left outside circle 3 and left end flange 8, dynamic seal ring I10 can prevent helium leak, and dust ring 7 can to avoid in rugged environment the particulate matters such as dust to enter swivel joint inside, damages seal ring; Static sealing ring I5 is provided with between right outside circle 2 and right-hand member flange 9.Limited ring groove 15 is provided with to ensure the alignment of left steel ball raceway (the steel ball raceway between left outside circle 3 and inner ring 1) and right steel ball raceway (the steel ball raceway between right outside circle 2 and inner ring 1) between left outside circle 3 and right outside circle 2.In inner ring 2, be provided with neck bush 4, this neck bush 4 and be equipped with dynamic seal ring I10 between left end flange 8 and right-hand member flange 9, and this neck bush 4 can float left and right.
LNG filling arm swivel joint of the present invention is easy to dismounting, and the ability of bearing moment of flexure is better.
When using LNG of the present invention filling arm swivel joint,
The inner ring of swivel joint of the present invention and medium are flowed into end be connected, neck bush and dynamic seal ring are installed; The outer ring of swivel joint is connected with medium outflow end.Should be noted during installation that nitrogen interface is alignd with blow valve port, after nitrogen purge line being in place.
Claims (6)
1. a LNG filling arm swivel joint, it is characterized in that: it comprises a ball bearing, the two ends of described ball bearing fix a left end flange and a right-hand member flange respectively;
Described ball bearing comprises inner ring, left outside circle and right outside circle, the steel ball raceway between described inner ring and described left outside circle and between the steel ball raceway between described inner ring and described right outside circle for being crisscross arranged;
Neck bush is provided with in described inner ring.
2. swivel joint according to claim 1, is characterized in that: be provided with limited ring groove between described left outside circle and described right outside circle.
3. swivel joint according to claim 1 and 2, is characterized in that: described neck bush and be equipped with dynamic seal ring between described left end flange and described right-hand member flange.
4. the swivel joint according to any one of claim 1-3, is characterized in that: be provided with static sealing ring between described left outside circle and described right outside circle.
5. the swivel joint according to any one of claim 1-4, is characterized in that: be provided with dynamic seal ring and dust ring between described left outside circle and described left end flange.
6. the swivel joint according to any one of claim 1-5, is characterized in that: be provided with static sealing ring between described right outside circle and described right-hand member flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720012.1A CN104405982B (en) | 2014-12-01 | 2014-12-01 | LNG fills arm swivel joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720012.1A CN104405982B (en) | 2014-12-01 | 2014-12-01 | LNG fills arm swivel joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104405982A true CN104405982A (en) | 2015-03-11 |
| CN104405982B CN104405982B (en) | 2016-09-07 |
Family
ID=52643632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410720012.1A Active CN104405982B (en) | 2014-12-01 | 2014-12-01 | LNG fills arm swivel joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405982B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541986A (en) * | 2019-09-24 | 2019-12-06 | 大连华锐重工集团股份有限公司 | Rotary joint for large LNG unloading arm |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7245040U (en) * | 1972-12-08 | 1974-03-14 | Acousa Saxon Sa | Combined axial-radial bearing |
| US4221408A (en) * | 1978-05-24 | 1980-09-09 | Fmc Corporation | Pipe swivel joint with optional static seal |
| CN1150836A (en) * | 1994-06-15 | 1997-05-28 | Fmc有限公司 | Step bearing race swivel joint assembly |
| US20030047944A1 (en) * | 2001-09-13 | 2003-03-13 | Tep Ungchusri | Coiled tubing swivel with stepped bearing races |
| CN2867046Y (en) * | 2005-11-29 | 2007-02-07 | 西北工业大学 | High temperature resisting rotary sealed joint |
| FR2958357A1 (en) * | 2010-04-06 | 2011-10-07 | Snr Roulements Sa | METHOD FOR ASSEMBLING A BEARING BEARING, BEARING BEARING SO ASSEMBLED AND ASSEMBLING A VEHICLE WHEEL BY MEANS OF SUCH BEARING. |
| US20120187675A1 (en) * | 2011-01-24 | 2012-07-26 | Delaware Capital Formation, Inc. | Fluid Handling Swivel Joints and Fluid Conveyance Equipment Incorporating The Same |
| CN204300574U (en) * | 2014-12-01 | 2015-04-29 | 中海石油气电集团有限责任公司 | A kind of LNG filling arm swivel joint |
-
2014
- 2014-12-01 CN CN201410720012.1A patent/CN104405982B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7245040U (en) * | 1972-12-08 | 1974-03-14 | Acousa Saxon Sa | Combined axial-radial bearing |
| US4221408A (en) * | 1978-05-24 | 1980-09-09 | Fmc Corporation | Pipe swivel joint with optional static seal |
| CN1150836A (en) * | 1994-06-15 | 1997-05-28 | Fmc有限公司 | Step bearing race swivel joint assembly |
| US20030047944A1 (en) * | 2001-09-13 | 2003-03-13 | Tep Ungchusri | Coiled tubing swivel with stepped bearing races |
| CN2867046Y (en) * | 2005-11-29 | 2007-02-07 | 西北工业大学 | High temperature resisting rotary sealed joint |
| FR2958357A1 (en) * | 2010-04-06 | 2011-10-07 | Snr Roulements Sa | METHOD FOR ASSEMBLING A BEARING BEARING, BEARING BEARING SO ASSEMBLED AND ASSEMBLING A VEHICLE WHEEL BY MEANS OF SUCH BEARING. |
| US20120187675A1 (en) * | 2011-01-24 | 2012-07-26 | Delaware Capital Formation, Inc. | Fluid Handling Swivel Joints and Fluid Conveyance Equipment Incorporating The Same |
| CN204300574U (en) * | 2014-12-01 | 2015-04-29 | 中海石油气电集团有限责任公司 | A kind of LNG filling arm swivel joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541986A (en) * | 2019-09-24 | 2019-12-06 | 大连华锐重工集团股份有限公司 | Rotary joint for large LNG unloading arm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104405982B (en) | 2016-09-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |