High-wear-resistance shield hob sealing structure

Abstract

The utility model discloses a high-wear-resistance shield hob sealing structure which comprises a hob hub and an end cover, a gap is formed between the hob hub and the end cover, an oil cavity is further formed between the end cover and the hob hub, the oil cavity is communicated with the gap, a floating sealing piece used for sealing the space between the oil cavity and the gap is installed in the oil cavity, and a lantern ring is arranged in the middle of the floating sealing piece in a sleeved mode. According to the high-wear-resistance shield hobbing cutter sealing structure, the lantern ring is arranged at the joint of the floating sealing piece in the cutter in a sleeving mode and used for preventing dust particles from entering the oil cavity from the gap, so that internal parts such as a bearing are prevented from being abraded, and the service life is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to shield machine cutter technical field, concretely is a kind of high wear-resistant shield cutter sealing structure. BACKGROUND

[0002] Floating seal ring is not resistant to particulate impurities, when the sealing medium contains a large amount of solid particulate impurities, these particles can be embedded between the sealing surface, wear sealing material. With the continuous grinding of particles, the sealing ring of the seal will gradually appear scratches, pits and other damage, thereby destroying the integrity of the sealing structure, increasing the risk of leakage, shield machine cutter exists using floating seal ring structure, thus there will be the above problems. SUMMARY

[0003] The utility model discloses a kind of high wear-resistant shield cutter sealing structure, to solve the problem that floating seal ring is not resistant to particulate impurities in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of high wear-resistant shield cutter sealing structure, including hub, end cover, gap is formed between hub and end cover, oil cavity is also formed between end cover and hub, oil cavity and gap are interconnected, floating seal is installed in oil cavity for sealing between oil cavity and gap, sleeve ring is sleeved in floating seal middle part.

[0005] Preferably, floating seal includes oil seal ring one and oil seal ring two, and the end faces of the two are attached to each other, and sealing rings are sleeved on the oil seal ring one and the oil seal ring two.

[0006] Preferably, the sleeve ring wraps around the connection between the oil seal ring one and the oil seal ring two.

[0007] Preferably, a fitting ring is provided at the inner circle of the sleeve ring, and the fitting ring is made of rubber and attached to the outer wall of the oil seal ring one and the oil seal ring two.

[0008] Compared with the prior art, the utility model has the advantages of the following:

[0009] The high wear-resistant shield cutter sealing structure of the utility model sleeves a sleeve ring at the connection of the floating seal in the cutter, to block dust particles from entering the oil cavity through the gap, thereby causing wear of internal components such as bearings and reducing the service life. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is the sectional view of the utility model;

[0011] Fig. 2 is the sectional view of the floating seal in the utility model;

[0012] Fig. 3The sleeve ring structure schematic diagram of the utility model.

[0013] In the figure: 1, knife hub; 2, end cover; 3, oil cavity; 4, floating sealing element; 41, oil seal ring one; 42, oil seal ring two; 43, sealing ring; 5, gap; 6, sleeve ring; 7, fit ring. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0015] Please refer to Figs. 1-3 A kind of high wear resistance shield cutter sealing structure, including knife hub 1, end cover 2, gap 5 is formed between knife hub 1 and end cover 2, oil cavity 3 is also formed between end cover 2 and knife hub 1, oil cavity 3 and gap 5 are interconnected, floating sealing element 4 for sealing between oil cavity 3 and gap 5 is installed in oil cavity 3, sleeve ring 6 is sleeved in floating sealing element 4 middle part, sleeve ring 6 is sleeved on floating sealing element 4, can prevent dust particles from entering oil cavity 3 from gap 5.

[0016] Wherein, floating sealing element 4 includes oil seal ring one 41 and oil seal ring two 42, and the end faces of the two are mutually fitted, and sealing ring 43 is sleeved on oil seal ring one 41 and oil seal ring two 42.

[0017] Sleeve ring 6 wraps the connecting portion between oil seal ring one 41 and oil seal ring two 42. Fit ring 7 is arranged at the inner circle of sleeve ring 6, and fit ring 7 is made of rubber material and is fitted with the outer wall surfaces of oil seal ring one 41 and oil seal ring two 42 respectively. Fit ring 7 further increases the sealing property of the connecting portion between the two oil seal rings, and prevents dust particles from entering the cutter inside the shield machine.

[0018] Working principle: the high wear resistance shield cutter sealing structure of the utility model, when using, sleeve ring 6 is sleeved at the connecting portion of the two oil seal rings, can prevent dust particles from entering oil cavity 3 from the connecting portion, and further cause the wear of internal parts such as bearing, reduce service life.

Claims

1. A high-wear-resistance shield cutter sealing structure, comprising a cutter hub (1) and an end cover (2), a gap (5) being formed between the cutter hub (1) and the end cover (2), characterized in that: An oil cavity (3) is further formed between the end cover (2) and the cutter hub (1), the oil cavity (3) and the gap (5) are communicated with each other, a floating seal (4) for sealing between the oil cavity (3) and the gap (5) is installed in the oil cavity (3), and a sleeve ring (6) is sleeved on the middle part of the floating seal (4).

2. A high-wear shield cutter sealing structure according to claim 1, characterized in that: The floating seal (4) comprises an oil seal ring one (41) and an oil seal ring two (42), the end faces of the two are adhered to each other, and the oil seal ring one (41) and the oil seal ring two (42) are both sleeved with a sealing ring (43).

3. A high-wear shield cutter sealing structure according to claim 2, characterized in that: The sleeve ring (6) wraps the connecting part between the oil seal ring one (41) and the oil seal ring two (42).

4. A high-wear shield cutter sealing structure according to claim 3, characterized in that: A lamination ring (7) is arranged at the inner ring of the sleeve ring (6), the lamination ring (7) is made of rubber and is respectively laminated with the outer wall surfaces of the oil seal ring one (41) and the oil seal ring two (42).

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