CN219102318U

CN219102318U - High-performance rotary joint

Info

Publication number: CN219102318U
Application number: CN202223316180.3U
Authority: CN
Inventors: 沈雷; 韩劲松; 陈新
Original assignee: CHANGZHOU HYH HYDRAULIC EQUIPMENT CO LTD
Current assignee: CHANGZHOU HYH HYDRAULIC EQUIPMENT CO LTD
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-05-30
Anticipated expiration: 2032-12-09

Abstract

The utility model provides a high-performance rotary joint, which comprises a mandrel, wherein an annular groove is formed in the position of the mandrel, which is connected with a sealing ring; the annular groove is filled with filler in a laser cladding mode, and the filler is made of iron-based alloy powder; the electroplating thickness of the outer surface of the mandrel is 0.05-0.06mm. The hardness of the part of the mandrel connected with the sealing ring can reach HRC55-60 before electroplating, and the part is not easy to wear, so that the service life is prolonged; and the performance is improved, the electroplating thickness is reduced, and the surface quenching process is eliminated, so that the cost is reduced.

Description

High-performance rotary joint

Technical Field

The utility model relates to the technical field of shield tunneling machine construction equipment, in particular to a high-performance rotary joint.

Background

The shield machine excavates through the rotary cutterhead. Therefore, a large amount of medium is required to be added to the cutting surface of the cutterhead continuously during construction, for example: water, foam, bentonite, hydraulic oil, air, etc. These media are transported through the rotary joint.

The rotary joint comprises a shell and a mandrel which is arranged in the shell and is rotationally connected, and the shell and the mandrel are sealed through a plurality of sealing rings. The traditional mandrel is made of 40Cr material, is finished after tempering (the hardness is HRC 32-36), is surface quenched (the hardness is HRC 52-55), and is electroplated with the thickness of a single side of 0.15mm after grinding. Due to the relatively low cleanliness of foam, water, bentonite, etc. and grease used for lubrication seals, particulate matter is entrained and can adsorb onto the seal ring, causing wear on the mandrel surface.

The repair is carried out by adopting a repair welding and reprocessing mode at the worn part, so that the mandrel is out of round due to high welding temperature, and the welding surface is easy to have air holes, so that the mandrel cannot reach the original size and performance.

Therefore, how to overcome the above-mentioned drawbacks is a problem to be solved by the person skilled in the art.

Disclosure of Invention

In order to solve the technical problems in the background technology, the utility model discloses a high-performance rotary joint.

The utility model provides a high-performance rotary joint, which comprises a mandrel, wherein an annular groove is formed in the position of the mandrel, which is connected with a sealing ring; the annular groove is filled with filler in a laser cladding mode, and the filler is made of iron-based alloy powder; the electroplating thickness of the outer surface of the mandrel is 0.05-0.06mm.

The hardness of the part of the mandrel connected with the sealing ring can reach HRC55-60 before electroplating, and the part is not easy to wear, so that the service life is prolonged; and the performance is improved, the electroplating thickness is reduced, and the surface quenching process is eliminated, so that the cost is reduced.

When the mandrel is machined and assembled, position accumulated errors exist, so that the sealing ring part is positioned at the outer side of the annular groove, and the outer side part of the annular groove is worn, and therefore the problem is further improved and solved.

If the annular groove is too wide, waste is caused, and the cost is increased, so that the problem is further improved and solved, and particularly, the width of the annular groove is 1.5-2.5 times of the thickness of the sealing ring.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a front cross-sectional view of the present utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

in the figure: 1. a mandrel; 2. an annular groove; 3. a seal ring; 4. a housing; 5. a fixing plate; 6. a filler; 7. an end cap.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

Embodiment one:

as shown in fig. 1, the utility model is a high-performance rotary joint, which comprises a shell 4 and a mandrel 1 inserted into the shell 4. The two ends of the shell 4 are respectively provided with an end cover 7 which is locked and fixed through bolts. The end cap 7 is mounted on the fixing plate 5 by bolts and nuts. Ball bearings are arranged at two ends of the mandrel 1 and are rotatably connected with the shell 4.

The inner wall of casing 4 is provided with a plurality of bulge loops that the interval was arranged, and every bulge loop all joint has two sealing washer 3, with dabber 1 sealing connection. The inner wall of the end cover 7 is also clamped with a sealing ring 3 which is in sealing connection with the mandrel 1.

As shown in fig. 2, an annular groove 2 is formed in the outer wall of the mandrel 1, which is connected with a sealing ring 3; the annular groove 2 is filled with a filler 6 in a laser cladding mode, and the filler 6 is made of iron-based alloy powder Fe60. The electroplating thickness of the outer surface of the mandrel 1 is 0.05mm. In embodiments thereof, the plating thickness may also be 0.06mm.

The hardness of the part of the mandrel 1 connected with the sealing ring 3 can reach HRC55-60 before electroplating, and the mandrel is not easy to wear, so that the service life is prolonged; and the performance is improved, the electroplating thickness is reduced, and the surface quenching process is eliminated, so that the cost is reduced.

Embodiment two:

the difference from the first embodiment is that: the width of the annular groove 2 is 1.5-2.5 times of the thickness of the sealing ring 3. In this embodiment, the annular groove 2 has a width twice the thickness of the seal ring 3. The arrangement of the width of the groove ensures that the packing 6 covers the sealing ring 3 when the mandrel 1 is processed and assembled to generate position accumulated errors, and waste is avoided.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. High performance rotary joint, including dabber (1), its characterized in that:

an annular groove (2) is formed in the position, connected with the sealing ring (3), of the mandrel (1);

filling a filler (6) in the annular groove (2) in a laser cladding mode, wherein the filler (6) is made of iron-based alloy powder;

the electroplating thickness of the outer surface of the mandrel (1) is 0.05-0.06mm.

2. A high performance swivel according to claim 1, wherein: the annular groove (2) is symmetrically arranged relative to the sealing ring (3), and the groove width of the annular groove is larger than the thickness of the sealing ring (3).

3. A high performance swivel according to claim 2, wherein: the width of the annular groove (2) is 1.5-2.5 times of the thickness of the sealing ring (3).