CN110005888B - Anti-freezing low-temperature fluid rotary joint - Google Patents
Anti-freezing low-temperature fluid rotary joint Download PDFInfo
- Publication number
- CN110005888B CN110005888B CN201910363135.7A CN201910363135A CN110005888B CN 110005888 B CN110005888 B CN 110005888B CN 201910363135 A CN201910363135 A CN 201910363135A CN 110005888 B CN110005888 B CN 110005888B
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- CN
- China
- Prior art keywords
- face
- shell
- seal
- ring
- tube shaft
- 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.)
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- 239000012530 fluid Substances 0.000 title claims abstract description 40
- 238000007710 freezing Methods 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 9
- 230000002528 anti-freeze Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 230000008014 freezing Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- F16L27/087—Joints with radial fluid passages
Abstract
The invention belongs to the field of low-temperature fluid equipment, and particularly relates to an anti-freezing low-temperature fluid rotary joint. The technical scheme of the invention is as follows: the anti-freezing low-temperature fluid rotary joint comprises an end face sealing connecting flange, a shell, a disc head tube shaft and a radial bearing, wherein the end face sealing connecting flange is detachably connected to the upper end of the shell; the end face seal connecting flange, the shell, the disc head tube shaft and the shell end face seal, the tube shaft rotary seal, the circular ring seal ring, the end face inner rotary seal and the end face outer rotary seal between the end face seal connecting flange and the shell, and the radial bearing is arranged in the seal cavity. The shell and the pan head tube shaft are integrated, the structure is simple, the bearing structure is adopted, the rotation resistance is small, and the service life is long.
Description
Technical Field
The invention relates to the field of low-temperature fluid equipment, in particular to an anti-freezing low-temperature fluid rotary joint.
Background
The low-temperature fluid rotary joint is a key component for manufacturing a low-temperature fluid loading arm such as liquid nitrogen, liquid oxygen, liquefied natural gas and the like, is used for connecting a pipeline and an elbow, and can rotate through low-temperature fluid without leakage and freezing. However, the existing cryogenic fluid rotary joint has the following common defects: in order to prevent the raceway steel balls from freezing, nitrogen is required to be used for continuously purging the rolling body part in the rotary joint during the working of the low-temperature rotary joint, nitrogen supply equipment and a pipeline system are required to be equipped, so that the investment cost of the equipment is increased, and nitrogen is wasted; the nitrogen channel is arranged in the low-temperature rotary joint, so that the rotary joint is complex in structure and easy to fail. The ball bearing structure has the advantages of large rotation resistance, short service life and inconvenient disassembly, assembly and maintenance.
Disclosure of Invention
The invention provides an anti-freezing low-temperature fluid rotary joint, wherein all bearings are arranged in a sealing cavity, so that air with water vapor is prevented from contacting with rolling bodies to prevent freezing, a nitrogen-free purging system is avoided, and nitrogen and supply equipment and pipelines thereof are saved.
The technical scheme of the invention is as follows:
the anti-freezing low-temperature fluid rotary joint comprises an end face sealing connecting flange, a shell, a disc head tube shaft and a radial bearing, wherein the end face sealing connecting flange is detachably connected to the upper end of the shell; the end face seal connecting flange, the shell, the disc head tube shaft and the shell end face seal between the disc head tube shaft and the shell end face seal, the tube shaft rotary seal, the circular ring seal, the end face inner rotary seal and the end face outer rotary seal form a seal cavity, and the radial bearing is arranged in the seal cavity to prevent air with water vapor from contacting with the rolling bodies so as to prevent freezing.
Further, the anti-freezing low-temperature fluid rotary joint is characterized in that a semicircular clamping ring is coaxially arranged in an annular groove in the middle section of a disc head tube shaft, a semicircular clamping ring positioning sleeve is sleeved outside the semicircular clamping ring, a bearing positioning sleeve is arranged between an end face sealing connecting flange and an outer ring of a radial bearing, and the bearing positioning sleeve is embedded in an inner hole of a shell.
Further, the anti-freezing low-temperature fluid rotary joint is characterized in that a thrust bearing is arranged between the semicircular clamping ring and the bottom of the shell, a shaft collar of the thrust bearing is sleeved on a disc head tube shaft, the upper end face of the thrust bearing is limited on the lower end face of the semicircular clamping ring, a seat ring of the thrust bearing is inlaid at the bottom of the shell, and the thrust bearing is arranged in the sealing cavity.
Further, the number of the radial bearings is at least one, and the radial bearings are arranged between the shell and the pan head pipe shaft, so that the shell and the pan head pipe shaft form rolling connection; the upper end face of the inner ring of the radial bearing positioned at the upper part is limited on the lower end face of the pan head tube shaft, the lower end face of the inner ring of the radial bearing positioned at the lower part is limited on the upper end face of the semicircular clamping ring, and the upper end face of the outer ring of the radial bearing positioned at the upper part is limited on the lower end face of the bearing positioning sleeve.
Further, the anti-freezing low-temperature fluid rotary joint is characterized in that an annular groove is formed in the upper end face of the disc head tube shaft, and an end face rotary sealing check ring is arranged in the annular groove.
Further, the anti-freezing low-temperature fluid rotary joint is characterized in that an end face inner rotary seal and/or an end face outer rotary seal are arranged between the end face sealing connecting flange and the disc head tube shaft, the end face inner rotary seal is embedded in an inner hole of the end face rotary seal retainer ring, and the end face outer rotary seal is embedded in an inner hole of the bearing positioning sleeve.
Further, the anti-freezing low-temperature fluid rotary joint is coaxially sleeved between the disc head tube shaft and the shell and is rotationally sealed on at least one tube shaft on the disc head tube shaft; a tube shaft rotary sealing pressing ring is arranged in a groove at the bottom of the shell; a dustproof ring frame flange is arranged in an annular groove at the lower end of the shell, and a tube shaft dustproof ring is arranged in an inner hole of the dustproof ring frame flange.
Further, the anti-freezing low-temperature fluid rotary joint is characterized in that the end face sealing connecting flange and the pan head tube shaft are respectively provided with a fluid channel center hole which is mutually communicated, and the upper end part of the end face sealing connecting flange and the lower end part of the pan head tube shaft are respectively provided with a welding interface; the lower end face of the end face sealing connecting flange and the upper end face of the disc head tube shaft are respectively provided with a stepped hole coaxial with the central hole of the disc head tube shaft near the central hole, and the annular sealing ring is embedded in the stepped holes.
Further, the anti-freezing low-temperature fluid rotary joint is characterized in that a shell end face seal is arranged between the upper end of the shell and the end face seal connecting flange.
Further, the anti-icing low-temperature fluid rotary joint is characterized in that an end face sealing connecting flange is connected to the upper end of the shell through a second fastener; the flange of the dustproof ring frame is connected to the lower end face of the shell by a first fastener.
The beneficial effects of the invention are as follows: the anti-freezing low-temperature fluid rotary joint solves the problem that nitrogen is required to be continuously used for purging rolling bodies for preventing freezing of the current low-temperature fluid rotary joint, has no nitrogen purging system, can work in occasions without nitrogen sources, and saves nitrogen, supply equipment and a pipeline system. The bearing structure is adopted to replace the steel ball pipeline structure, so that the rotation resistance is small and the service life is long. The shell and the pan head rotating shaft are integrated, and the structure is simple.
Drawings
FIG. 1 is a schematic view of a first embodiment of an anti-freeze cryogenic fluid swivel;
FIG. 2 is a schematic structural view of a second embodiment of an anti-freeze cryogenic fluid swivel;
FIG. 3 is a schematic structural view of a third embodiment of an anti-freeze cryogenic fluid swivel;
FIG. 4 is a schematic structural view of a fourth embodiment of an anti-freeze cryogenic fluid swivel;
FIG. 5 is a schematic structural view of a fifth embodiment of an anti-freeze cryogenic fluid swivel;
FIG. 6 is a schematic structural view of a sixth embodiment of an anti-freeze cryogenic fluid swivel;
FIG. 7 is a schematic view of an end face seal connection flange;
FIG. 8 is a schematic view of a housing structure;
fig. 9 is a schematic view of the structure of the pan head tube shaft.
Detailed Description
Example 1
As shown in fig. 1, the anti-freezing low-temperature fluid rotary joint comprises an end face sealing connecting flange 18, a shell 8, a disc head tube shaft 1, a radial bearing 11 and a thrust bearing 7, wherein the end face sealing connecting flange 18 is detachably connected to the upper end of the shell 8, and the radial bearing 11 is arranged between the disc head tube shaft 1 and the shell 8; the end face seal connecting flange 18, the shell 8, the shell end face seal ring 17 between the pan head pipe shaft 1 and the shell end face seal ring, the pan head pipe shaft rotary seal 6, the circular ring seal ring 16, the end face inner rotary seal 15 and the end face outer rotary seal 13 form a seal cavity, and all bearings are arranged in the seal cavity to prevent the air with water vapor from contacting with the rolling bodies so as to prevent freezing.
A semicircular clamping ring 9 is coaxially arranged in an annular groove in the middle section of the pan head tube shaft 1, a semicircular clamping ring positioning sleeve 10 is sleeved outside the semicircular clamping ring 9, a bearing positioning sleeve 12 is arranged between an end face sealing connecting flange 18 and the outer ring of the radial bearing 11, and the bearing positioning sleeve 12 is embedded in an inner hole of the shell 8.
The number of the radial bearings 11 is three, and the radial bearings 11 are arranged between the shell 8 and the disc head tube shaft 1, so that the shell 8 and the disc head tube shaft 1 form rolling connection; the upper end face of the inner ring of the radial bearing 11 positioned at the upper part is limited on the lower end face of the pan head tube shaft 1, the lower end face of the inner ring of the radial bearing 11 positioned at the lower part is limited on the upper end face of the semicircular snap ring 9, and the upper end face of the outer ring of the radial bearing 11 positioned at the upper part is limited on the lower end face of the bearing positioning sleeve 12.
A thrust bearing 7 is arranged between the semicircular clamping ring 9 and the bottom of the shell 8, a shaft collar of the thrust bearing 7 is sleeved on the disc head tube shaft 1, the upper end face of the thrust bearing 7 is limited on the lower end face of the semicircular clamping ring 9, and a seat ring of the thrust bearing 7 is inlaid at the bottom of the shell 8.
An annular groove is arranged on the upper end face of the disc head tube shaft 1, and an end face inner rotary sealing check ring 14 is arranged in the annular groove.
An end face inner rotary seal 15, an end face outer rotary seal 13 and a circular ring sealing ring 16 are arranged between the end face seal connecting flange 18 and the disc head tube shaft 1, the end face inner rotary seal 15 is embedded in an inner hole of the end face inner rotary seal retainer ring 14, and the end face outer rotary seal 13 is embedded in an inner hole of the bearing positioning sleeve 12. The end face seal connecting flange 18, the disc head tube shaft 1, the bearing positioning sleeve 12 and the end face inner rotary seal retainer ring 14 form a combined seal groove for placing the end face inner rotary seal 15 and the end face outer rotary seal 13.
The two disc head tube shafts 1 and the shell 8 are coaxially sleeved on the disc head tube shafts 1 and are in rotary seal 6; a tube shaft rotary sealing pressing ring 5 is arranged in a bottom groove of the shell 8; the annular groove at the lower end of the shell 8 is provided with a dust ring frame flange 2, and an inner hole of the dust ring frame flange 2 is provided with a pipe shaft dust ring 3.
The end face sealing connecting flange 18 and the pan head tube shaft 1 are respectively provided with a fluid channel center hole which is communicated with each other, and the upper end part of the end face sealing connecting flange 18 and the lower end part of the pan head tube shaft 1 are respectively provided with a welding interface; the lower end face of the end face seal connection flange 18 and the upper end face of the pan head pipe shaft 1 are respectively provided with a stepped hole coaxial with the central hole of the pan head pipe shaft 1 near the central hole, and the annular sealing ring 16 is embedded in the stepped holes.
A shell end face sealing ring 17 is arranged between the upper end of the shell 8 and an end face sealing connection flange 18.
The end face sealing connecting flange 18 is connected to the upper end of the shell 8 by a second fastener 19; the dust ring frame flange 2 is connected to the lower end face of the housing 8 by a first fastener 4.
Example 2
As shown in fig. 2, the difference from embodiment 1 is that the number of radial bearings 11 is two, and a retainer ring is provided between the two radial bearings 11.
Example 3
As shown in fig. 3, the difference from embodiment 1 is that the number of radial bearings 11 is two.
Example 4
As shown in fig. 4, the difference from embodiment 1 is that only the radial bearing 11 is provided and no thrust bearing is provided.
Example 5
As shown in fig. 5, the difference from embodiment 4 is that the number of radial bearings 11 is two, and a retainer ring is provided between the two radial bearings 11.
Example 6
As shown in fig. 6, the difference from example 4 is that the number of radial bearings 11 is two.
Claims (7)
1. The anti-freezing low-temperature fluid rotary joint is characterized by comprising an end face sealing connecting flange, a shell, a disc head tube shaft and a radial bearing, wherein the end face sealing connecting flange is detachably connected to the upper end of the shell; the device comprises an end face seal connecting flange, a shell, a disc head tube shaft and a shell end face seal, a tube shaft rotary seal, a circular ring seal, an end face inner rotary seal and an end face outer rotary seal between the end face seal connecting flange and the shell, wherein a radial bearing is arranged in the seal cavity; a tube shaft rotary sealing pressing ring is arranged in a groove at the bottom of the shell; a dustproof ring frame flange is arranged in an annular groove at the lower end of the shell, and a tube shaft dustproof ring is arranged in an inner hole of the dustproof ring frame flange.
2. The anti-freezing cryogenic fluid rotary joint according to claim 1, wherein a semicircular clamping ring is coaxially arranged in an annular groove in the middle section of the tube shaft of the disc head, a semicircular clamping ring positioning sleeve is sleeved outside the semicircular clamping ring, a bearing positioning sleeve is arranged between the end face sealing connecting flange and the outer ring of the radial bearing, and the bearing positioning sleeve is embedded in the inner hole of the shell.
3. The anti-freezing cryogenic fluid rotary joint according to claim 2, wherein a thrust bearing is arranged between the semicircular snap ring and the bottom of the shell, a shaft collar of the thrust bearing is sleeved on a shaft of the disc head, the upper end face of the thrust bearing is limited on the lower end face of the semicircular snap ring, a seat ring of the thrust bearing is inlaid at the bottom of the shell, and the thrust bearing is arranged in the sealing cavity.
4. The anti-freeze cryogenic fluid rotary joint of claim 2, wherein the number of radial bearings is at least one, the radial bearings being disposed between the housing and the pan head spool such that the housing and the pan head spool form a rolling connection; the upper end face of the inner ring of the radial bearing positioned at the upper part is limited on the lower end face of the pan head tube shaft, the lower end face of the inner ring of the radial bearing positioned at the lower part is limited on the upper end face of the semicircular clamping ring, and the upper end face of the outer ring of the radial bearing positioned at the upper part is limited on the lower end face of the bearing positioning sleeve.
5. The anti-freezing cryogenic fluid rotary joint according to claim 1, wherein the end face sealing connection flange and the disc head tube shaft are respectively provided with a fluid passage center hole which is mutually communicated, and welding interfaces are respectively arranged at the upper end part of the end face sealing connection flange and the lower end part of the disc head tube shaft; the lower end face of the end face sealing connecting flange and the upper end face of the disc head tube shaft are respectively provided with a stepped hole coaxial with the central hole of the disc head tube shaft near the central hole, and the annular sealing ring is embedded in the stepped holes.
6. The anti-freeze cryogenic fluid rotary joint of claim 1, wherein a housing end seal is provided between the housing upper end and the end seal connection flange.
7. The anti-freeze cryogenic fluid rotary joint of claim 1, wherein the end face seal connection flange is connected to the upper end of the housing with a second fastener; the flange of the dustproof ring frame is connected to the lower end face of the shell by a first fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910363135.7A CN110005888B (en) | 2019-04-30 | 2019-04-30 | Anti-freezing low-temperature fluid rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910363135.7A CN110005888B (en) | 2019-04-30 | 2019-04-30 | Anti-freezing low-temperature fluid rotary joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110005888A CN110005888A (en) | 2019-07-12 |
| CN110005888B true CN110005888B (en) | 2024-03-01 |
Family
ID=67175329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910363135.7A Active CN110005888B (en) | 2019-04-30 | 2019-04-30 | Anti-freezing low-temperature fluid rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005888B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833185B (en) * | 2021-02-05 | 2022-08-12 | 江苏徐工工程机械研究院有限公司 | Tensile revolving body |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5642946A (en) * | 1994-11-17 | 1997-07-01 | Skf France | Rolling-contact bearing equipped with a sealing device for the passage of fluid |
| JP2004316775A (en) * | 2003-04-16 | 2004-11-11 | Eagle Ind Co Ltd | Rotary joint |
| KR20090095257A (en) * | 2008-03-05 | 2009-09-09 | 동남정공(주) | Pipe connector |
| CN102042451A (en) * | 2010-10-15 | 2011-05-04 | 红云红河烟草(集团)有限责任公司 | Dual-fluid channel rotary joint |
| CN105697909A (en) * | 2016-04-19 | 2016-06-22 | 北京航天发射技术研究所 | Low-temperature rotation connector |
| CN206487967U (en) * | 2017-03-01 | 2017-09-12 | 鞍山市昱虎流体设备有限公司 | A kind of cryogenic swivel |
| CN209818979U (en) * | 2019-04-30 | 2019-12-20 | 鞍山市昱虎流体设备有限公司 | Anti-freezing low-temperature fluid rotary joint |
-
2019
- 2019-04-30 CN CN201910363135.7A patent/CN110005888B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5642946A (en) * | 1994-11-17 | 1997-07-01 | Skf France | Rolling-contact bearing equipped with a sealing device for the passage of fluid |
| JP2004316775A (en) * | 2003-04-16 | 2004-11-11 | Eagle Ind Co Ltd | Rotary joint |
| KR20090095257A (en) * | 2008-03-05 | 2009-09-09 | 동남정공(주) | Pipe connector |
| CN102042451A (en) * | 2010-10-15 | 2011-05-04 | 红云红河烟草(集团)有限责任公司 | Dual-fluid channel rotary joint |
| CN105697909A (en) * | 2016-04-19 | 2016-06-22 | 北京航天发射技术研究所 | Low-temperature rotation connector |
| CN206487967U (en) * | 2017-03-01 | 2017-09-12 | 鞍山市昱虎流体设备有限公司 | A kind of cryogenic swivel |
| CN209818979U (en) * | 2019-04-30 | 2019-12-20 | 鞍山市昱虎流体设备有限公司 | Anti-freezing low-temperature fluid rotary joint |
Non-Patent Citations (2)
| Title |
|---|
| Pike-Biegunski M J et al..Hermetically sealed automotive connector.《interConnection Technology》.1993,第9卷(第2期),第28-31页. * |
| 严宇 ; 缪宏 ; 孙福华 ; 张程 ; 袁日灿 ; .LNG装卸臂用耐低温旋转接头研究与设计.农业装备技术.2017,(第01期),第40-41页. * |
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| CN110005888A (en) | 2019-07-12 |
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