CN210318955U

CN210318955U - High-temperature-resistant rotary joint

Info

Publication number: CN210318955U
Application number: CN201921138172.XU
Authority: CN
Inventors: 庄凤娜; 戴永斌; 汤磊; 周存华
Original assignee: Wuxi Aike Sealing Technology Co ltd
Current assignee: Wuxi Aike Sealing Technology Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-14
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a high temperature resistant rotary joint, which comprises a housin, end cover and pivot, the sunken opening inner chamber that forms of one end of casing, the end cover sets up and seals in the opening end pair inner chamber of casing, the protruding centre bore that just sets up intercommunication inner chamber of the other end of casing forms first interface, pivot cavity and its one end can be rotatory for the casing through the assembly of the inner chamber wall of first antifriction bearing with the casing, the other end stretches out the end cover and forms the second interface, the protruding spacing portion that has of inside wall department that is close to the end cover in the pivot, be equipped with second antifriction bearing between spacing portion and the end cover, be used for spacing to the countershaft axial, in the circumferential clearance of end cover and pivot, all be provided with the carbonaceous sealing ring in the circumferential clearance. The rotary joint is stable in structure, good in sealing performance and high in high-temperature resistance, the carbon-containing sealing ring and the rolling bearing are matched, the rotary torque is reduced, the carbon-containing sealing ring is excellent in performance, good in heat resistance and small in contact friction, and the rotary joint is suitable for high-temperature working conditions.

Description

High-temperature-resistant rotary joint

Technical Field

The utility model relates to a rotary joint who uses in the mechanical rotary seal trade especially relates to a high temperature resistant rotary joint.

Background

The rotary joint is a sealed rotary connector for conveying media in a 360-degree rotating mode, and the application field of the rotary joint almost covers various processing and manufacturing industries. Taking the solar industry as an example, the rotary joint is commonly used for conveying working media such as high-temperature steam, high-temperature hot oil, and dissolved salt.

Because of the limitation of the performance of sealing materials, most rotary joints in the market can resist temperature lower than 360 ℃, and under the working condition of the temperature higher than the temperature, the sealing performance is greatly reduced, and the service life is shortened. The conventionality is that adopt the circulating water to wash the cooling and handle, reduces the surface temperature of sealing member to improve rotary joint's operational environment, but this kind of cooling mode cost is higher, destroys the sealing performance of sealing member easily, causes the leakage, and because the temperature that can reduce working medium of the washing cooling of cooling water is an energy loss to the equipment of heating originally, and is not applicable to and uses widely in batches greatly.

Therefore, it is still desirable to improve the high temperature resistance of the rotary joint to meet the use requirement under high temperature conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high temperature resistant rotary joint provides the high temperature resistant ability of structure, guarantees sealed effect, satisfies the use needs.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a high temperature resistant rotary joint, which comprises a housin, end cover and pivot, the sunken opening inner chamber that forms of one end of casing, the end cover sets up and seals in the opening end pair inner chamber of casing, the protruding centre bore that just sets up the intercommunication inner chamber of the other end of casing forms first interface, pivot cavity and its one end can be rotatory for the casing through the assembly of the inner chamber wall of first antifriction bearing and casing, the other end stretches out the end cover and forms the second interface, be close to the protruding spacing portion that has of inside wall department of end cover in the pivot, be equipped with second antifriction bearing between spacing portion and the end cover, be used for spacing to the countershaft axial, in the circumferential gap of end cover and pivot, all be provided with the carbonaceous sealing ring in.

Furthermore, a middle cover is further arranged in the inner cavity of the shell, the middle cover is sleeved on the rotating shaft in a clearance mode, the first rolling bearing and the carbon-containing sealing ring on the rotating shaft are limited and axially pressed, a connecting bolt is arranged on the middle cover, the connecting bolt extends out of the shell to be assembled with a nut, and the position of the middle cover is adjusted through rotating the nut outside the shell.

Furthermore, an elastic washer is clamped between the nut and the shell.

Further, the carbon-containing sealing ring is a graphite sealing ring.

Further, the first rolling bearing is an oilless bearing, and the second rolling bearing is a thrust ball bearing.

Further, the first interface and the second interface are coaxial.

Furthermore, a gap exists between the end face of the shaft at one end of the rotating shaft, which is positioned in the inner cavity, and the inner cavity wall of the shell, and a buffer ring is arranged in the gap.

To sum up, the beneficial effects of the utility model are that, compared with the prior art, high temperature resistant rotary joint is stable in structure, and the leakproofness is good, and high temperature resistant ability is strong, adopts the cooperation of carbonaceous sealing ring and antifriction bearing, has reduced the rotation moment of torsion, and carbonaceous sealing ring excellent performance, and heat resistance is good, and contact friction is little, is applicable to the high temperature operating mode, and the condition of revealing reduces by a wide margin.

Drawings

Fig. 1 is a schematic structural diagram of a high temperature resistant rotary joint according to an embodiment of the present invention.

In the figure:

1-a shell; 2-end cap; 3-a rotating shaft; 4-middle cover; 5-a first interface; 6-a first rolling bearing; 7-a second interface; 8-a limiting part; 9-a second rolling bearing; 10-a buffer ring; 11-a carbon-containing sealing ring; 12-a connecting bolt; 13-a nut; 14-elastic gasket.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically 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 in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present embodiment provides a high temperature resistant rotary joint, which mainly includes a housing 1, an end cap 2, a rotating shaft 3 and a middle cap 4.

One end of the shell 1 is sunken to form an opening inner cavity, the end cover 2 is arranged at the opening end of the shell 1 to seal the inner cavity, and the other end of the shell 1 is raised and provided with a center hole communicated with the inner cavity to form a first interface 5.

The shaft 3 is hollow and has one end that is rotatable relative to the housing 1 by means of a first rolling bearing 6 fitted to the inner cavity wall of the housing 1, where the first rolling bearing 6 is preferably an oilless bearing, subject to radial loads. The other end of the rotating shaft 3 extends out of the end cover 2 to form a second interface 7, and optimally, the first interface 5 and the second interface 7 are coaxial.

A limiting part 8 protrudes from the inner side wall of the rotating shaft 3 close to the end cover 2, a second rolling bearing 9 is assembled between the limiting part 8 and the end cover 2 and used for limiting the rotating shaft 3 in the axial direction, and the second rolling bearing 9 is preferably a thrust ball bearing and bears axial load.

A gap is formed between the end face of the shaft at one end of the rotating shaft 3, which is positioned in the inner cavity, and the wall of the inner cavity of the shell 1, and a buffer ring 10 is arranged in the gap.

And a carbon-containing sealing ring 11 is arranged in the circumferential gap between the end cover 2 and the rotating shaft 3 and the circumferential gap between the shell 1 and the rotating shaft 3. The carbon-containing sealing ring 11 is preferably a graphite sealing ring, and it is emphasized that the graphite sealing ring has excellent heat resistance and small friction coefficient, and the structure is stable under the working condition of 450 ℃ or above.

Well lid 4 is arranged in the inner chamber of casing 1, and the clearance ground cover is located pivot 3 for first antifriction bearing 6 on the pivot 3, carbonaceous sealing ring 11 are spacing and axial are exerted pressure, forms the extrusion to carbonaceous sealing ring 11 through the axial effect during the most main effect, improves carbonaceous sealing ring 11's sealed effect.

The middle cover 4 is provided with a connecting bolt 12, the connecting bolt 12 extends out of the shell 1 and is assembled with a nut 13, the position of the middle cover 4 is adjusted by rotating the nut 13 outside the shell 1, and an elastic washer 14 is clamped between the nut 13 and the shell 1. For example, when the working condition temperature rises and the leakage condition occurs, the leakage phenomenon can be obviously improved only by compressing the carbon-containing sealing ring 11 through the external adjusting nut 13, the adaptability is strong, and the operation is simple.

To sum up, above-mentioned high temperature resistant rotary joint structure is stable, and the leakproofness is good, and high temperature resistant ability is strong, adopts carbonaceous sealing ring and antifriction bearing cooperation, has reduced the rotation moment of torsion, and carbonaceous sealing ring excellent performance, and heat resistance is good, and contact friction is little, is applicable to the high temperature operating mode, and the condition of revealing reduces by a wide margin.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high temperature resistant rotary joint, its characterized in that, includes casing, end cover and pivot, the sunken opening inner chamber that forms of one end of casing, the end cover set up in the opening end of casing seals the inner chamber, the protruding centre bore of just seting up the intercommunication inner chamber of the other end of casing forms first interface, pivot cavity and its one end through first antifriction bearing with the assembly of the inner chamber wall of casing can be rotatory for the casing, the other end stretches out the end cover forms the second interface, be close to the protruding spacing portion that has of inside wall department of end cover in the pivot, spacing portion with be equipped with second antifriction bearing between the end cover for it is spacing to the countershaft axial, the end cover with in the circumferential clearance of pivot the casing with all be provided with the carbonaceous sealing ring in the circumferential clearance of pivot.

2. The high temperature resistant rotary joint of claim 1, wherein: the inner cavity of the shell is also internally provided with a middle cover which is sleeved on the rotating shaft at intervals and is used for limiting a first rolling bearing and a carbon-containing sealing ring on the rotating shaft and exerting pressure axially, the middle cover is provided with a connecting bolt, the connecting bolt extends out of the shell to be assembled with a nut, and the position of the middle cover is adjusted by rotating the nut outside the shell.

3. The high temperature resistant rotary joint of claim 2, wherein: an elastic washer is clamped between the nut and the shell.

4. The high temperature resistant rotary joint of claim 1, wherein: the carbon-containing sealing ring is a graphite sealing ring.

5. The high temperature resistant rotary joint of claim 1, wherein: the first rolling bearing is an oilless bearing, and the second rolling bearing is a thrust ball bearing.

6. The high temperature resistant rotary joint of claim 1, wherein: the first interface and the second interface are coaxial.

7. The high temperature resistant rotary joint of claim 1, wherein: a gap exists between the shaft end face of one end, located in the inner cavity, of the rotating shaft and the inner cavity wall of the shell, and a buffer ring is arranged in the gap.