CN218759886U

CN218759886U - Supporting structure for floating seal ring

Info

Publication number: CN218759886U
Application number: CN202223309059.8U
Authority: CN
Inventors: 夏生鹏
Original assignee: Shentuo Technology Co ltd
Current assignee: Shentuo Technology Co ltd
Priority date: 2022-12-10
Filing date: 2022-12-10
Publication date: 2023-03-28
Anticipated expiration: 2032-12-10

Abstract

The utility model relates to a bearing structure that floating seal circle was used belongs to hobbing cutter technical field. Including the sword hub with inlay the arbor of establishing in the sword hub, the cover is equipped with the bearing on the arbor, and locks the end cover of arbor with be located the floating seal circle between end cover and the bearing, be provided with supporting component in the inner ring of floating seal circle, supporting component's one end inlays and locates in the end cover, the other end and bearing butt, the utility model discloses a set up a supporting component in floating seal circle inner ring department, let among the supporting component support the supporting ring support floating seal circle and the sealing ring let the better laminating of floating seal circle on the sealing ring that comes of floating seal circle, under the effect through supporting ring and sealing ring, let floating seal circle can not be because of pushing the die cavity opening direction under the pressure that externally applys, lead to sealing washer extrusion deformation landing back sealed inefficacy, inside mud got into the hobbing cutter to the condition that causes the hobbing cutter to damage takes place.

Description

Supporting structure for floating seal ring

Technical Field

The utility model belongs to the technical field of the hobbing cutter, concretely a bearing structure that floating seal circle was used.

Background

The shield machine serves as advanced, efficient and environment-friendly high-end equipment for tunnel excavation construction, and becomes the first-choice equipment for tunnel excavation construction of engineering such as urban subways, highways, municipal pipe galleries, water conservancy and hydropower stations and the like due to the advantages of high automation degree, high excavation efficiency, construction safety, small disturbance to surrounding rock strata and the like. The shield cutter is used as a tooth of the shield machine, is arranged on a cutter head panel, is convexly arranged forwards according to different track radiuses, is directly contacted with rock soil, and is a key part for the excavation construction of the shield machine.

However, the hob with the existing structure generally has the following defects: 1. because two sets of tapered roller bearings are arranged in the same cutter body inner cavity and are only sealed by metal floating seals on two sides, the sealing reliability and stability are poor, and the problem of sealing failure often occurs; once the seal is lost efficacy, silt will get into the cutter body inner chamber from the cutter body side to lead to the bearing card to die, damage, hobbing cutter forced stop work. 2. At present, the dynamic seals on two sides of the hob adopt traditional metal floating oil seals and comprise two symmetrical metal rings, the two metal rings are attached to each other through a high-flatness and high-roughness sealing surface, a dynamic sealing interface is formed at the upper part of the dynamic sealing interface, and pressure is transferred between the metal rings and a sealing cavity through a compressed O-shaped sealing ring so as to ensure that the sealing interface is tightly attached to realize sealing. However, the sealing can only be used in a working condition environment with the internal and external pressure difference smaller than 0.3Mpa, and the internal and external pressure difference is often larger than 0.3Mpa when the tunnel is buried deeply in the actual construction process, such as the construction of a sea-river-crossing tunnel. Therefore, when the pressure difference between the outside and the inside is greater than 0.3MPa, the O-shaped sealing ring in the sealed cavity is pushed to the opening direction of the cavity by the pressure applied from the outside, the O-shaped sealing ring is extruded, deformed and slid to cause sealing failure, and slurry enters the inside of the hob, so that the hob is damaged. Therefore, the sealing performance of the floating sealing ring needs to be further improved, the floating sealing ring cannot be subjected to external pressure to cause sealing failure, and therefore the service life of the hob is prolonged.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned problem that exists among the prior art, the utility model provides a bearing structure that floating seal used has solved floating seal and has received the problem that outside pressure leads to sealed inefficacy.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a bearing structure that floating seal used, includes the sword hub and inlays the arbor of establishing in the sword hub, the cover is equipped with the bearing on the arbor, and locks the end cover of arbor and the floating seal who is located between end cover and the bearing, be provided with supporting component in the inner ring of floating seal, supporting component's one end inlays and locates in the end cover, the other end and bearing butt.

This seal structure supports the floating seal circle through setting up a supporting component in floating seal circle inner ring department, and under the condition that the internal and external differential pressure of hobbing cutter is greater than 0.3MPa, the supporting component can play the supporting role to the floating seal circle, lets the floating seal circle can not be because of pushing to the die cavity opening direction under the externally exerted pressure, leads to sealing failure after the sealing washer extrusion deformation landing, inside mud gets into the hobbing cutter to cause the hobbing cutter to damage.

As an optimal technical scheme of the utility model, the supporting component includes support ring and sealing ring, the one end of support ring is located the sealing ring and is connected with the sealing ring, and the other end is connected with the end cover, the one end and the bearing butt of support ring are kept away from to the sealing ring.

As an optimized technical proposal of the utility model, the support ring is made of carbon structural steel.

As a preferred technical scheme of the utility model, the sealing ring comprises polyurethane micropore elastomer.

As a preferred technical scheme of the utility model, a side surface of sealing ring is seted up flutedly, the one end of support ring is fixed in the recess.

As an optimized technical scheme of the utility model, the constant head tank has been seted up on a lateral wall surface of end cover, the support ring is kept away from the one end of recess and is fixed in the constant head tank.

As an optimized technical scheme of the utility model, the support ring adopts the vulcanization mode to be connected with the sealing ring.

The beneficial effects of the utility model are that: through set up a supporting component in floating seal circle inner ring department, let among the supporting component support floating seal circle and sealing ring let the better laminating of floating seal circle on the sealing ring of coming of floating seal circle, under the effect through supporting ring and sealing ring, let floating seal circle can not be because of pushing to the die cavity opening direction under the externally exerted pressure, lead to sealing ring extrusion deformation landing back sealed inefficacy, inside mud gets into the hobbing cutter to the condition that causes the hobbing cutter damage takes place.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a front sectional view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the supporting assembly of the present invention;

description of the main elements

In the figure: 1. a cutter hub; 2. a cutter shaft; 3. a bearing; 4. an end cap; 5. a floating seal ring; 6. a support assembly; 61. a support ring; 62. and (4) a sealing ring.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-3, the present embodiment provides a supporting structure for a floating seal ring, including a cutter hub 1 and a cutter shaft 2 embedded in the cutter hub 1, a bearing 3 is sleeved on the cutter shaft 2, an end of the cutter shaft 2 is locked by an end cover 4, a floating seal ring 5 is disposed between the bearing 3 and the end cover 4, a supporting component 6 is disposed inside the floating seal ring 5, one end of the supporting component 6 is embedded in the end cover 4, and the other end of the supporting component abuts against the bearing 3, the floating seal ring 5 is supported by disposing the supporting component 6 inside the floating seal ring 5, when the shield machine is located at a deep position, and a pressure difference between the inside and the outside is greater than 0.3MPa, the floating seal ring 5 is inwardly pushed under the external pressure to cause the floating seal ring 5 to be separated from a seal region, so that external slurry enters the inside of the hob to cause damage, and the supporting component 6 can play a supporting role when the floating seal ring 5 is subjected to the external pressure, so that the floating seal ring 5 cannot be extruded and deformed, thereby causing the seal region to fail.

In order to better play a supporting role, in an embodiment, the supporting component 6 includes a supporting ring 61 and a sealing ring 62, two ends of the supporting ring 61 are respectively located in the end cover 4 and the sealing ring 62, the other end of the sealing ring 62 is abutted on the bearing 3, one end of the wrapping supporting ring 61 is abutted on the end cover 4, the supporting ring 62 is supported by the supporting ring 61, one end of the supporting ring 61 is positioned and fixed by the end cover 4, and the abutting of the sealing ring 62 on the bearing 3 and the end cover 4 ensures that the supporting component 6 cannot shake in the hob interior to avoid the poor supporting effect.

In order to better support, in an embodiment, the support ring 61 is made of carbon structural steel, which may be Q235A (A3 steel), and the structural steel has high plasticity, toughness, certain strength and good cold bending performance, and the support ring 61 made of the structural steel can provide good support for the integral support assembly 6, and meanwhile, since the spacer rings inside the hob are generally made of the same material, it is possible to avoid purchasing different materials, and the manufacturing process of the support assembly 6 is more convenient.

In order to make the sealing ring 62 be able to be used for a longer time, in an embodiment, the sealing ring 62 is made of a polyurethane microporous elastomer, because lubricating oil exists inside the hob, and the polyurethane microporous elastomer has the characteristics of wear resistance and oil resistance, the sealing ring 62 can have a longer service life in the environment inside the hob, meanwhile, because the floating sealing ring 5 needs to reserve a certain gap during installation, the polyurethane microporous elastomer also has the characteristics of good elasticity and large deformation, and thus, the situation that the floating sealing ring 5 fails to be installed due to the fact that the sealing ring 62 is abutted against the bearing 3 and the end cover 4 when being installed in the floating sealing ring 5, and the sealing effect of the floating sealing ring 5 fails can be ensured.

In order to make the supporting assembly 6 have better supporting effect, in an embodiment, a side surface of the sealing ring 62 is provided with a groove, the supporting ring 61 is mostly embedded in the groove, a part of the supporting ring is fixed in the end cover 4, the sealing ring 62 is made of an elastomer, so that the sealing ring 62 basically has no supporting effect on the floating sealing ring 5, and the supporting effect of the sealing ring 62 when contacting the floating sealing ring 5 is ensured by embedding the supporting ring 61 in the sealing ring 62 to support the sealing ring 62.

For better fixing the support ring 61, in an embodiment, a positioning groove is formed on the inner surface of the end cover 4, one end of the support ring 61 is fixed in the positioning groove, the position of the support ring 61 is determined by the positioning groove, the position of the support ring 61 is fixed, the support assembly 6 can better support the floating seal ring 5, the support assembly 6 can support the floating seal ring 5 by limiting the position of the support ring 61, and the floating seal ring 5 cannot slip off under external pressure to cause seal failure.

In order to better prolong the service life of the support assembly 6, in an embodiment, the support ring 61 is connected with the seal ring 62 by vulcanization, because after the support ring 61 and the seal ring 62 are vulcanized, the support ring 61 and the seal ring 62 are compressed against each other, so that cracks and disbonds between the support ring 61 and the seal ring 62 are not easily generated, thereby prolonging the service life of the support assembly 6.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a bearing structure that floating seal circle was used which characterized in that: including sword hub (1) and inlay arbor (2) of establishing in sword hub (1), the cover is equipped with bearing (3) on arbor (2), and locks end cover (4) of arbor (2) and floating seal circle (5) that are located between end cover (4) and bearing (3), be provided with supporting component (6) in the inner ring of floating seal circle (5), the one end of supporting component (6) inlays and locates in end cover (4), the other end and bearing (3) butt.

2. The support structure for a floating seal ring according to claim 1, wherein: the support assembly (6) comprises a support ring (61) and a sealing ring (62), one end of the support ring (61) is located in the sealing ring (62) and connected with the sealing ring (62), the other end of the support ring is connected with the end cover (4), and one end, away from the support ring (61), of the sealing ring (62) is abutted to the bearing (3).

3. The support structure for a floating seal ring according to claim 2, wherein: the support ring (61) is made of carbon structural steel.

4. The support structure for a floating seal ring according to claim 2, wherein: the sealing ring (62) is made of polyurethane microcellular elastomer.

5. The support structure for a floating seal ring according to claim 4, wherein: a groove is formed in the surface of one side of the sealing ring (62), and one end of the supporting ring (61) is fixed in the groove.

6. The support structure for a floating seal ring according to claim 2, wherein: a positioning groove is formed in the surface of one side wall of the end cover (4), and one end, far away from the groove, of the support ring (61) is fixed in the positioning groove.

7. The support structure for a floating seal ring according to claim 2, wherein: the support ring (61) is connected with the sealing ring (62) in a vulcanization mode.