CN214064134U - Rotary joint - Google Patents
Rotary joint Download PDFInfo
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- CN214064134U CN214064134U CN202022808184.8U CN202022808184U CN214064134U CN 214064134 U CN214064134 U CN 214064134U CN 202022808184 U CN202022808184 U CN 202022808184U CN 214064134 U CN214064134 U CN 214064134U
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- ring
- wear
- fixing
- rotating body
- rotary joint
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Abstract
The utility model provides a rotary joint, include: a fixed body having an installation space formed therein; a rotating body, an insertion part at the front end of the rotating body is inserted into the installation space; a sealing member provided in an annular space between an outer surface of the insertion portion and an inner surface of the installation space, the sealing member including: the outer side of the wear-resisting ring is circumferentially provided with a groove; the O-shaped ring is sleeved in the circumferential groove on the outer side of the wear-resisting ring; and a fixing member fixing the sealing member to the annular space; wherein, the inner side of the wear-resistant ring is in interference fit with the insertion part at the front end of the rotating body; the sealing element is in interference fit in the installation space; the inner diameter of the O-shaped ring is smaller than the outer diameter of the circumferential groove on the outer side of the wear-resisting ring. The utility model discloses radial seal compensation volume is big, requires lowerly to the axiality, has improved the reliability in reduce cost.
Description
Technical Field
The utility model relates to a machinery trade fluid medium pipe-line transportation field especially relates to a rotary joint.
Background
The rotary joint is a sealed connecting device for conveying fluid media from a static system to a rotary system, and mainly comprises a rotary body, a fixed body, a sealing element, a rotary support and the like. The sealing element of the existing rotary joint mainly comprises a ceramic end face seal, and the rotary support mainly adopts a standard radial bearing structure.
However, in the case of a rotary joint sealed by a ceramic end face as a seal, the coaxiality of the installation of the rotary body and the fixed body is required to be high, otherwise abnormal wear and leakage of the seal are easily caused. In addition, the rotating joint supported by the standard radial bearing structure also requires high coaxiality of installation of the rotating body and the fixed body, otherwise the bearing is easy to be damaged by bearing extra load. In addition, the lubrication of the bearing is required, and if a medium having no lubricating property is fed, a separate lubricating passage needs to be designed, which makes the structure complicated.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model discloses in order to solve at least one in the above technical problem partially at least.
(II) technical scheme
In order to achieve the above object, the present invention provides a rotary joint.
The utility model discloses rotary joint includes: a fixed body, in which a fixed via hole and an installation space coaxial with the fixed via hole are formed; a rotating body having a rotating via hole formed therein and coaxially and communicating with the fixing via hole, the insertion portion of the front end of the rotating body being inserted into the installation space; a sealing member provided in an annular space between an outer surface of the insertion portion and an inner surface of the installation space, the sealing member including: the outer side of the wear-resisting ring is circumferentially provided with a groove; the O-shaped ring is sleeved in the circumferential groove on the outer side of the wear-resisting ring; and a fixing member fixing the sealing member to the annular space; wherein, the inner side of the wear-resistant ring is in interference fit with the insertion part at the front end of the rotating body; the sealing element is in interference fit in the installation space; the inner diameter of the O-shaped ring is smaller than the outer diameter of the circumferential groove on the outer side of the wear-resisting ring.
In some embodiments of the present invention, the amount of the inner diameter of the O-ring smaller than the outer diameter of the circumferential groove outside the wear ring is between 0.2mm and 2 mm.
In some embodiments of the present invention, the interference of the interference fit between the inner side of the wear ring and the insertion portion of the front end of the rotating body is between 0.1 mm and 1 mm.
In some embodiments of the present invention, the interference of the interference fit of the sealing member in the installation space is between 0.2mm and 2 mm.
In some embodiments of the present invention, include: n sealing members which are independent and separable are sequentially arranged in the annular space along the axial direction.
In some embodiments of the utility model, in the sealing member, a single wear ring outside circumference sets up m recesses, and m O type circle overlaps respectively and locates in corresponding recess, and m is greater than or equal to 2.
In some embodiments of the utility model, the wear-resisting ring adopts self-lubricating material preparation, and O type circle adopts elastic material preparation.
In some embodiments of the present invention, the O-ring is made of a fluororubber material.
In some embodiments of the present invention, the self-lubricating material is one of the following materials: engineering plastics, graphite, copper or copper alloys.
In some embodiments of the present invention, a clamp spring groove is formed at a predetermined position of the inner surface of the installation space; the fixing member includes from inside to outside: a gasket and a clamp spring; the clamp spring is clamped in the clamp spring groove, the gasket on the inner side is pressed, and under the elastic action of the clamp spring, the gasket fixes the position of the sealing element in the installation space.
In some embodiments of the present invention, the gasket and the clamp spring are made of stainless steel.
In some embodiments of the present invention, the fixing manner of the fixing body and the fixing part is one of the following manners: flange type, screw thread type, pin shaft type.
In some embodiments of the present invention, the fixing manner of the rotating body and the rotating part is one of the following manners: flange type, screw thread type, pin shaft type.
(III) advantageous effects
According to the above technical solution, the utility model discloses rotary joint has one of them of following beneficial effect at least:
(1) the sealing element consisting of the wear-resistant ring and the O-shaped ring does not use the ceramic end face seal and the standard radial bearing structure in the traditional technology, has large radial seal compensation amount, can compensate the different axial degree errors of the rotating body and the fixed body, reduces the installation precision requirement and is not easy to leak.
(2) The sealing element is used as the support of the rotating body and the fixed body, so that the structure is simpler and the reliability is higher. The n sealing elements are mutually independent and can be separately designed, increase, decrease and replacement can be carried out according to conditions, the flexibility of production and maintenance is improved, and the use cost is reduced.
(3) The wear-resistant ring is made of the self-lubricating sealing material, so that a medium without lubricating performance can be conveyed without designing a separate lubricating channel, and the structure is simpler.
Drawings
Fig. 1 is a schematic view of a rotary joint according to an embodiment of the present invention.
Fig. 2A is a side view of a single one of the independently separable seals in the rotary joint shown in fig. 1.
FIG. 2B is a top view of the O-ring of the seal shown in FIG. 2A.
[ description of main reference symbols in the drawings ]
10-a stationary body;
11-fixed via holes;
20-a rotating body;
21-rotating via holes; 22-an insertion portion;
30-a seal;
31-a wear ring; a 32-O ring;
40-a fixing piece;
41-a gasket; 42-clamp spring.
Detailed Description
The utility model provides a rotary joint, it does not adopt ceramic end face seal and bearing rotation support, but adopts the sealing material of self-lubricating performance as the sealing member, and the sealing member is regarded as the support of rotator and fixed body simultaneously, and the structure is simpler, and the reliability is higher.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that these embodiments are provided merely to enable the invention to satisfy applicable legal requirements and that the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In one exemplary embodiment of the present invention, a rotary joint is provided. Fig. 1 is a schematic view of a rotary joint according to an embodiment of the present invention. Fig. 2A is a side view of a single one of the independently separable seals in the rotary joint shown in fig. 1. FIG. 2B is a top view of the O-ring of the seal shown in FIG. 2A. As shown in fig. 1, 2A, and 2B, the rotary joint of the present embodiment includes:
a fixed body 10 having a fixed via hole 11 and an installation space coaxial with the fixed via hole formed therein;
a rotating body 20 having a rotating through hole 21 formed therein and communicating with the fixing through hole coaxially, and an insertion portion 22 at a front end of the rotating body being inserted into the mounting space;
a sealing member 30 provided in an annular space between an outer surface of the insertion portion and an inner surface of the installation space;
and a fixing member 40 for fixing the sealing member 30 to the annular space
Wherein the seal comprises: a wear ring 31, the outer periphery of which is provided with a groove; and an O-shaped ring 32 sleeved in the groove on the outer side of the wear-resistant ring; inner diameter D of O-ring 32O-INSmaller than the outer diameter D of the wear-resistant ring grooveG-OUTOuter diameter D of sealW-OUTOuter peripheral diameter D larger than installation spaceS-IN. Outer diameter D of sealW-OUTThe outer diameter of the whole sealing element formed after the O-shaped ring is arranged on the wear-resistant ring.
In this embodiment, the sealing member that comprises wear ring and O type circle, ceramic face seal and radial bearing among the traditional art do not adopt, adopt interference fit between sealing member and the installation space, and the compressive deformation that O type circle produced provides the required elasticity of compensation for the radial compensation of sealing member to make this sealing member radial seal compensation volume increase, can compensate the not axiality error of rotator and fixed body, reduce the installation required precision, difficult emergence is leaked.
The rotary joint of the present embodiment will be described in detail below.
The fixing mode of the fixing body and the fixing part of the utility model can be flange type, thread type, pin shaft type, etc. In this embodiment, the rotary joint is used to lubricate the connection between the stationary pipe in the transport pipe to the rotationally moving equipment. The fixing of the fixing body 10 to the fixing part (not shown) is of the flange type, that is: the fixing body and the fixing parts are fixed on the flange plates, the flange pad is arranged between the two flange plates, and finally the two flange plates are tightly combined by 8 bolts which are evenly distributed in the circumferential direction, so that the fixing body and the fixing parts are fixed.
Similarly, the fixing method of the rotating body and the rotating part may be a flange type, a screw type, a pin type, or the like. And will not be described in detail herein.
Referring to fig. 1, in the present embodiment, the sealing member includes: 3 sealing members and a fixing member for fixing the 3 sealing members in the annular space are sequentially arranged along the axial direction.
It should be noted that 3 sealing members are structures which are independently separable from each other. In other embodiments of the present invention, the number of the sealing elements may be n, where n is greater than or equal to 2. The sealing elements are arranged to be mutually independent and separable, and the sealing rings can be increased, decreased and replaced according to the situation of the field, so that the flexibility of production and maintenance is improved, and the use cost is reduced.
Fig. 2A is a side view of a single one of the independently separable seals in the rotary joint shown in fig. 1. FIG. 2B is a top view of the O-ring of the seal shown in FIG. 2A. Referring to fig. 1 and fig. 2A and 2B, the sealing member includes:
a wear ring 31, the outer side of which is formed with a groove;
and the O-shaped ring 32 is sleeved in the groove on the outer side of the wear-resisting ring.
Wherein, the wear-resisting ring 31 is made of self-lubricating material. The self-lubricating material can be engineering plastics, graphite, copper or copper alloy, related composite (mixed) materials and the like. By adopting the self-lubricating material, the medium without lubricating performance can be conveyed without designing a separate lubricating channel, and the structure is simpler. In addition, the O-ring 32 is made of a fluororubber material, and is elastic and corrosion resistant. Of course, the O-ring may be made of other elastic materials.
In this embodiment, the inner side of the wear-resistant ring is in interference fit with the insertion part at the front end of the rotating body, the interference magnitude is 0.2mm, and the inner diameter D of the O-ringO-INOuter diameter D of the wear ring grooveG-OUTThe diameter is 1mm smaller, so that the O-shaped ring has a contraction effect on the wear-resisting ring, the central position of the inner side of the wear-resisting ring is promoted to contract inwards, and the O-shaped ring is in a close fit state with the outer side of the insertion part at the relevant position. In this case, two or more wear rings can provide both a rotational support effect for the insert and no leakage effect between the two during the transport of the flowing medium.
As will be understood by those skilled in the art, based on the differences in the structure and material characteristics of the wear-resistant ring and the O-shaped ring, the pressure of the conveying medium and the diameter of the wear-resistant ring, the interference magnitude of the interference fit between the inner side of the wear-resistant ring and the insertion part at the front end of the rotating body is between 0.1 mm and 1mm, and the inner diameter of the O-shaped ring is smaller than the outer diameter of the circumferential groove at the outer side of the wear-resistant ring by 0.2mm and 2mm, similar effects can be produced, and will not be described herein again.
In addition, the outer diameter D of the whole sealing element formed by installing the O-shaped ring on the wear-resisting ringW-OUTOuter peripheral diameter D larger than installation spaceS-IN. The outer side of the O-shaped ring extends out of the abrasion-resistant ring groove and is compressed in an interference mode with the inner side of the annular space at the corresponding position, and the interference range is 0.2-2 mm.
It should be understood by those skilled in the art that although a groove is formed in the outer side of the wear-resistant ring and an O-ring is sleeved in the groove in the embodiment, in other embodiments of the present invention, m grooves may be formed in the outer side of the wear-resistant ring and a corresponding number of O-rings are sleeved, where m is greater than or equal to 2, which may achieve the same technical effect and is not described herein again.
As mentioned above, the sealing element formed by combining the wear-resistant ring and the O-shaped ring through the improvement of the materials and the structures has large radial sealing compensation amount, can overcome the different axial degree errors of the rotating body and the fixed body, reduces the installation precision requirement, and is not easy to leak.
Referring to fig. 1, a clamp spring groove is formed at a predetermined position of the inner surface of the installation space. In the installation space, a fixing member for fixing the seal member is provided axially outside the seal member. The fixing member 40 includes, from inside to outside: a washer 41 and a circlip 42. Wherein, the circlip 42 is blocked in the circlip groove to press the gasket at the inner side. The gasket 41 fixes the position of the seal member in the installation space by the elastic force of the circlip 42.
Wherein, the gasket 41 and the clamp spring 42 are both made of stainless steel materials. It should be understood by those skilled in the art that the materials of the circlip and the washer can be selected according to the requirement, and should not be limited to the materials listed in the embodiment.
So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings.
It should be noted that for some implementations, if not essential to the invention and well known to those of ordinary skill in the art, they are not illustrated in detail in the drawings or in the description, which can be understood with reference to the related prior art.
Furthermore, the above definitions of the various elements and methods are not limited to the particular structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by one of ordinary skill in the art, for example:
(1) the number of the sealing elements can be reasonably determined according to the size of the installation space and the medium pressure;
(2) materials and dimensions of the wear ring and O-ring;
(3) the form of the fixing member is various and is not limited to the embodiment.
From the above description, a person skilled in the art should have a clear understanding of the rotary joint of the present invention.
To sum up, the utility model provides a rotary joint, it has avoided adopting ceramic face seal and radial bearing to because the special construction of wear-resisting ring and O type circle, its radial seal compensation volume is big, and is lower to the axiality requirement, has improved the reliability in reduce cost, in addition, through adopting independent separable sealing member, has promoted the flexibility of rotary joint production and maintenance greatly, has reduced use cost.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present invention. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.
Unless expressly indicated to the contrary, the numerical parameters set forth in the specification and claims may be approximations that may vary depending upon the teachings of the invention. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about," which is intended to be interpreted to mean including within the meaning of a specified amount, in some embodiments, a variation of ± 10%, in some embodiments, a variation of ± 5%, in some embodiments, a variation of ± 1%, and in some embodiments, a variation of ± 0.5%.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
The above-mentioned embodiments, which have been described in detail to illustrate the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (10)
1. A swivel joint, comprising:
a fixed body, in which a fixed via hole and an installation space coaxial with the fixed via hole are formed;
a rotating body having a rotating through hole formed therein and communicating with the fixing through hole coaxially, an insertion portion of a front end of the rotating body being inserted into the installation space;
a seal disposed in an annular space between an outer surface of the insert portion and an inner surface of the mounting space, the seal comprising: the outer side of the wear-resisting ring is circumferentially provided with a groove; the O-shaped ring is sleeved in the circumferential groove on the outer side of the wear-resisting ring; and
a fixing member fixing the sealing member to the annular space;
wherein, the inner side of the wear-resistant ring is in interference fit with the insertion part at the front end of the rotating body; the sealing element is in interference fit in the mounting space; the inner diameter of the O-shaped ring is smaller than the outer diameter of the circumferential groove on the outer side of the wear-resisting ring.
2. The rotary joint of claim 1, wherein the O-ring inner diameter is less than the wear ring outer circumferential groove outer diameter by an amount between 0.2mm and 2 mm.
3. The swivel joint of claim 1, wherein:
the interference magnitude of interference fit between the inner side of the wear-resisting ring and the insertion part at the front end of the rotating body is 0.1-1 mm; and/or
The interference magnitude of the interference fit of the sealing element in the installation space is between 0.2mm and 2 mm.
4. The rotary joint according to claim 1, comprising: n sealing members which are independent and separable from each other are sequentially arranged in the annular space along the axial direction.
5. The rotary joint according to claim 1, wherein m grooves are circumferentially arranged on the outer side of a single wear-resistant ring in the sealing element, m O-rings are respectively sleeved in the corresponding grooves, and m is more than or equal to 2.
6. The swivel joint of claim 1, wherein said wear ring is made of a self-lubricating material and said O-ring is made of an elastomeric material.
7. The swivel joint of claim 6, wherein:
the O-shaped ring is made of a fluororubber material; and/or
The self-lubricating material is one of the following materials: engineering plastics, graphite, copper or copper alloys.
8. The swivel joint of claim 1, wherein:
a clamp spring groove is formed in a preset position of the inner surface of the mounting space;
the fixing member includes from inside to outside: a gasket and a clamp spring; the clamp spring is clamped in the clamp spring groove, the gasket on the inner side is pressed, and under the elastic action of the clamp spring, the gasket fixes the position of the sealing element in the installation space.
9. The rotary joint as claimed in claim 8, wherein the washer and the circlip are made of stainless steel material.
10. The rotary joint according to any one of claims 1 to 9, wherein:
the fixing mode of the fixing body and the fixing part is one of the following modes: flange type, thread type, pin type; and/or
The fixing mode of the rotating body and the rotating part is one of the following modes: flange type, screw thread type, pin shaft type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022808184.8U CN214064134U (en) | 2020-11-27 | 2020-11-27 | Rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022808184.8U CN214064134U (en) | 2020-11-27 | 2020-11-27 | Rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214064134U true CN214064134U (en) | 2021-08-27 |
Family
ID=77404190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022808184.8U Active CN214064134U (en) | 2020-11-27 | 2020-11-27 | Rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214064134U (en) |
-
2020
- 2020-11-27 CN CN202022808184.8U patent/CN214064134U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhongguancun Technology Leasing Co.,Ltd. Assignor: BEIJING XINGYOU TECHNOLOGY Co.,Ltd. Contract record no.: X2022980008843 Denomination of utility model: Rotary joint Granted publication date: 20210827 License type: Exclusive License Record date: 20220624 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Rotary joint Effective date of registration: 20220627 Granted publication date: 20210827 Pledgee: Zhongguancun Technology Leasing Co.,Ltd. Pledgor: BEIJING XINGYOU TECHNOLOGY Co.,Ltd. Registration number: Y2022980009087 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |