CN213236480U

CN213236480U - Miniature high-pressure rotary joint structure

Info

Publication number: CN213236480U
Application number: CN202020946009.2U
Authority: CN
Inventors: 张高剑; 余汇涛; 包建国
Original assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Current assignee: Research Institute of Nuclear Power Operation; China Nuclear Power Operation Technology Corp Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-05-18
Anticipated expiration: 2030-05-29

Abstract

The utility model belongs to the technical field of hydraulic system pipe joint structure, concretely relates to miniature high pressure rotary joint structure. The structure of the rotary joint comprises a fixed shaft, a rotary shaft and a limiting piece; a cavity is arranged in the fixed shaft, one end of the cavity is connected with equipment to be connected or a pipeline interface, the other end of the cavity is connected with the rotating shaft, and the rotating shaft is connected through a limiting piece so that the rotating shaft can rotate but cannot move axially; the rotating shaft is internally provided with a cavity which is communicated with the cavity of the fixed shaft. Has the advantages that: simple structure is reasonable, difficult seepage, stand wear and tear, structural dimension are little, solve current rotary joint because of structural dimension is big, can't satisfy narrow and small space or the little installation and the problem of use of structural dimension requirement.

Description

Miniature high-pressure rotary joint structure

Technical Field

The utility model belongs to the technical field of hydraulic system pipe joint structure, concretely relates to miniature high pressure rotary joint structure.

Background

At present, rotary joint is often used in hydraulic pressure pipeline, and rotary joint structure size is big, can't satisfy the installation and the operation requirement that narrow and small space or structure size require for a short time. Through literature search, the closest prior art is chinese patent with publication number CN 202946811U, with application date of 2012, 11/12, and the patent names: a small high-pressure rotary joint. The utility model discloses a small-size high pressure rotary joint has the radial hole on the fixed body, and the back of fixed body tail end keeps off the external side and is provided with the retaining ring, and the rotator cup joints on the fixed body that keeps off the body before taking through the bearing. The utility model has the advantages that: simple structure is reasonable, and the compressive capacity is strong, and the stationary body passes through the bearing location with the rotator contact, has guaranteed that rotary seal does not receive the unbalance loading, difficult wearing and tearing, long service life. This technique adopts the support and the sealed of two sealing washers of duplex bearing cooperation realization rotator, and fixed axle head adopts the retaining ring to carry on spacingly to the rotator, however, this rotary joint's overall structure is comparatively complicated, the size is great, and rotator screwed interface only is radial arrangement, and application scope is limited. Therefore, the utility model discloses mainly to above-mentioned problem, develop a simple structure, be difficult for revealing, stand wear and tear, the miniature high pressure rotary joint that the size is littleer.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniature high pressure rotary joint to the great scheduling problem of prior art overall structure complicacy, size.

The technical scheme of the utility model as follows:

a miniature high-pressure rotary joint comprises a fixed shaft, a rotary shaft and a limiting piece; a cavity is arranged in the fixed shaft, one end of the cavity is connected with equipment to be connected or a pipeline interface, the other end of the cavity is connected with the rotating shaft, and the rotating shaft is connected through a limiting piece so that the rotating shaft can rotate but cannot move axially; the rotating shaft is internally provided with a cavity which is communicated with the cavity of the fixed shaft.

Further, the limiting piece adopts a ball structure.

Furthermore, the fixed shaft is of a rotary structure, one end of the fixed shaft is of a threaded structure or a flange structure, the other end of the fixed shaft is of a unthreaded hole structure, and the inner diameter of the fixed shaft is not smaller than the outer diameter of the rotating shaft.

Furthermore, a ring groove is processed on the inner wall of the unthreaded hole of the fixed shaft, a ring groove is processed on the outer wall of the rotating shaft, and the inner diameter of a complete ring groove formed by the two ring grooves is larger than the diameter of the ball; the clearance between the inner wall of the fixed shaft and the inner diameter of the rotating shaft is smaller than the diameter of the ball.

Furthermore, the fixed shaft is at least provided with 2 threaded holes, and the bottoms of the threaded holes are communicated with the ring grooves; in full annular is filled in with the ball installation through the screw hole, again with screw in screw hole, prevent that the ball from spilling over.

Furthermore, the section of a complete ring groove formed between the fixed shaft and the rotating shaft is circular.

Further, a sealing element is arranged between the fixed shaft and the rotating shaft.

Furthermore, a transition section cavity is arranged between the cavity of the fixed shaft and the cavity of the rotating shaft, the diameter of one end of the transition section is the same as that of the cavity of the fixed shaft, and the diameter of the other end of the transition section is the same as that of the cavity of the rotating shaft.

The beneficial effects of the utility model reside in that:

the utility model discloses a miniature high-pressure rotary joint structure is simple reasonable, difficult seepage, stand wear and tear, structural dimension is little, solves current rotary joint because of structural dimension is big, can't satisfy the problem of installation and use that narrow and small space or structural dimension require to be little.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-rotating shaft, 2-rolling ball, 3-screw, 4-sealing ring and 5-fixed shaft.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example 1

The present embodiment provides a micro high-pressure rotary joint, which has a structure as shown in fig. 1, and includes a fixed shaft 5, a rotary shaft 1, a sealing member 4, and a limiting member.

The fixed shaft 5 is of a rotary structure, one end of the fixed shaft can be of an internal thread or external thread structure or a flange structure and the like and is connected with other equipment or pipeline interfaces, the other end of the fixed shaft is connected with the rotating shaft 1, the fixed shaft is connected with the rotating shaft 1 through a limiting piece, so that the rotating shaft 1 can rotate but cannot axially move, and a sealing piece 4 is arranged between the fixed shaft 5 and the rotating shaft 1; the center opening of the rotating shaft 1 is communicated with the center through hole of the fixed shaft 5, a plurality of mounting holes are axially or radially processed on the other side of the rotating shaft 1 and connected with pipelines or other structures needing to rotate, and therefore fluid is led into other pipelines or equipment needing to rotate.

The miniature high-pressure rotary joint of the embodiment has the advantages of simple overall structure, reliable connection, compact structure, good sealing effect and wide application prospect.

Example 2

In this embodiment, on the basis of embodiment 1, a micro high-pressure rotary joint using balls 2 as a limiting member is provided, and the micro high-pressure rotary joint in this embodiment is further described with reference to fig. 1.

The fixed shaft 5 is a rotary structure, the cross section of the fixed shaft is formed by combining a concave structure and an inverted convex structure, a cavity is arranged in the fixed shaft to serve as a fluid channel, one end of the fixed shaft 5 is an internal thread or external thread structure or a flange structure and the like, and is connected with other equipment to be connected or a pipeline interface. The other end is of a smooth hole structure, the inner diameter of the smooth hole structure is equivalent to the outer diameter of the rotating shaft 1, a ring groove with a semicircular or square cross section is processed on the smooth hole, the smooth hole and the ring groove on the rotating shaft 1 form a complete circular ring groove, and at least 2 threaded holes are formed in the fixed shaft 5 to enable the bottom of each threaded hole to be communicated with the semicircular ring groove. In filling full circular annular through the screw hole with ball 2 installation, prevent that ball 2 from overflowing with screw 3 screw in screw hole again to realize rotation axis 1's radial fixed, do not influence rotation axis 1's rotary motion.

In addition, a ring groove is processed on any side of the fixed shaft 5 or the rotating shaft 1 for installing the sealing element 4, so that the fixed shaft 5 and the rotating shaft 1 are sealed, and the internal fluid is prevented from overflowing.

The rotating shaft 1 is internally provided with a cavity which is communicated with the cavity of the fixed shaft 5, and a plurality of mounting holes can be axially or radially processed on the other side of the rotating shaft 1 to be connected with pipelines or other equipment needing to rotate.

The inner diameter of the cavity of the rotating shaft 1 is equal to or slightly smaller than that of the cavity of the fixed shaft 5 and is positioned on the same axis. In this embodiment, the diameter of the cavity of the fixed shaft 5 is slightly larger than the cavity of the rotating shaft 1, a truncated cone transition section cavity is arranged between the fixed shaft and the rotating shaft, the diameter of one end of the transition section is the same as that of the cavity of the fixed shaft 5, and the diameter of the other end of the transition section is the same as that of the cavity of the rotating shaft 1.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A miniature high-pressure rotary joint which is characterized in that: comprises a fixed shaft (5), a rotating shaft (1) and a limiting piece; a cavity is arranged in the fixed shaft (5), one end of the cavity is connected with equipment to be connected or a pipeline interface, the other end of the cavity is connected with the rotating shaft (1), and the cavity is connected with the rotating shaft (1) through a limiting piece, so that the rotating shaft (1) can rotate but cannot move axially; the rotating shaft (1) is internally provided with a cavity which is communicated with the cavity of the fixed shaft (5).

2. A miniature high pressure swivel as claimed in claim 1, wherein: the limiting piece adopts a ball (2) structure.

3. A miniature high pressure swivel as claimed in claim 2, wherein: the fixed shaft (5) is of a rotary structure, one end of the fixed shaft is of a threaded structure or a flange structure, the other end of the fixed shaft is of a unthreaded hole structure, and the inner diameter of the fixed shaft is not smaller than the outer diameter of the rotating shaft (1).

4. A miniature high pressure swivel as claimed in claim 3, wherein: an annular groove is processed on the inner wall of the unthreaded hole of the fixed shaft (5), an annular groove is processed on the outer wall of the rotating shaft (1), and the inner diameter of a complete annular groove formed by the two annular grooves is larger than the diameter of the ball (2); the clearance between the inner wall of the fixed shaft (5) and the inner diameter of the rotating shaft (1) is smaller than the diameter of the ball (2).

5. A miniature high pressure swivel as claimed in claim 4, wherein: the fixed shaft (5) is at least provided with 2 threaded holes, and the bottoms of the threaded holes are communicated with the ring grooves; the ball (2) is installed and filled in the ring groove through the threaded hole, and then the screw (3) is screwed into the threaded hole to prevent the ball (2) from overflowing.

6. A miniature high pressure swivel as claimed in claim 4, wherein: the section of a complete ring groove formed between the fixed shaft (5) and the rotating shaft (1) is circular.

7. The miniature high pressure swivel according to any of claims 1-6, wherein: and a sealing element (4) is also arranged between the fixed shaft (5) and the rotating shaft (1).

8. A miniature high-pressure swivel according to claim 1 or 2, wherein: a transition section cavity is arranged between the cavity of the fixed shaft (5) and the cavity of the rotating shaft (1), the diameter of one end of the transition section is the same as that of the cavity of the fixed shaft (5), and the diameter of the other end of the transition section is the same as that of the cavity of the rotating shaft (1).