CN213597976U

CN213597976U - Hob cutter device

Info

Publication number: CN213597976U
Application number: CN202022838034.1U
Authority: CN
Inventors: 刘飞香; 彭正阳; 暨智勇; 阳旭; 任勇; 肖京
Original assignee: China Railway Construction Heavy Industry Group Co Ltd
Current assignee: China Railway Construction Heavy Industry Group Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-02
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses a hobbing cutter device, including sword hub, cutter ring and arbor, the cutter ring install in on the sword hub, just the sword hub with the cutter ring the two can be relative the arbor rotates, the sword hub with be equipped with between the arbor and be used for the support the sword hub with the bearing assembly of cutter ring still includes two at least locates bearing assembly outside, be used for guaranteeing the sealing performance's of bearing assembly place inner chamber seal structure. Above-mentioned hobbing cutter device can improve bearing capacity to avoid appearing the damage condition such as big deformation or fracture when the excavation hard rock, simultaneously, can also improve hobbing cutter dynamic seal reliability and bearing capacity, thereby satisfy the demand that the hobbing cutter tunnelled in high water pressure stratum.

Description

Hob cutter device

Technical Field

The utility model relates to a tunneling technical field, in particular to hobbing cutter device.

Background

The heading machine is construction equipment widely applied to construction of underground tunnel engineering in recent years. The hob is one of common cutters which are arranged on a cutter head of the heading machine and used for excavating rock and soil, and the sealing performance and the bearing capacity of the hob are two important factors influencing the service life of the hob. However, the conventional hob still has limitations in use under certain special geological conditions, such as sealing failure easily occurs when tunneling in a high-water-pressure ultra-hard rock stratum, and the hob is damaged; or the bearing capacity of the hob is insufficient, so that the problem that the tunneling efficiency is reduced due to abrasion easily occurs, and the like.

Therefore, how to avoid the problem that the bearing capacity and the sealing performance of the hob cannot meet the requirements of the heading machine on service life and heading efficiency is a technical problem to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hobbing cutter device, this hobbing cutter device can improve bearing capacity to avoid appearing the damage condition such as big deformation or fracture when excavating the hard rock, simultaneously, can also improve hobbing cutter dynamic seal reliability and bearing capacity, thereby satisfy the demand that the hobbing cutter tunnelled in high water pressure stratum.

In order to achieve the above object, the utility model provides a hobbing cutter device, including sword hub, cutter ring and arbor, the cutter ring install in on the sword hub, just the sword hub with the cutter ring two can be relative the arbor rotates, the sword hub with be equipped with between the arbor and be used for the support the sword hub with the bearing assembly of cutter ring still includes two at least locates the outside of bearing assembly, be used for guaranteeing the sealing performance's of bearing assembly place inner chamber seal structure.

Optionally, the bearing assembly includes two bearings arranged oppositely, and an outer ring of any one of the bearings is fixedly connected to the cutter hub, and an inner ring of the bearing is fixedly connected to the cutter shaft.

Optionally, the two bearings are symmetrically arranged with respect to the axis of the cutter ring.

Optionally, a shaft shoulder end cover and a threaded end cover are respectively arranged outside the two bearings, a first sealing structure is arranged between the shaft shoulder end cover and the cutter hub, and a second sealing structure is arranged between the threaded end cover and the cutter hub.

Optionally, the cutter hub is provided with a rotary metal ring, the shaft shoulder end cover and the threaded end cover are both provided with floating metal rings, and any floating metal ring is attached to the rotary metal ring to form a third sealing structure.

Optionally, the first sealing structure includes a first slot provided on the shaft shoulder end cover and a first polyurethane seal engaged with the first slot.

Optionally, the second seal structure includes a second slot provided on the threaded end cap and a second polyurethane seal cooperating with the second slot.

Optionally, a plurality of O-rings are disposed on each of the shoulder end cap, the threaded end cap, and the rotating metal ring.

Optionally, the inside of arbor is equipped with along its axial through's pressure adjustment chamber, the internally mounted in pressure adjustment chamber has two pressure regulating pistons that are used for controlling the inside and outside pressure balance of sword hub.

Optionally, the cutter shaft is connected with a spacer ring which is arranged along the axial direction of the cutter ring and used for separating the two bearings, and a central hole which penetrates through the spacer ring along the axial direction and is communicated with the pressure adjusting cavity is formed in the spacer ring.

Compared with the prior art, the embodiment of the utility model provides a hobbing cutter device, including sword hub, cutter ring and arbor, the cutter ring is installed on the sword hub, and the two cutter shafts relatively of sword hub and cutter ring rotate, is equipped with bearing assembly between sword hub and the arbor, and bearing assembly is used for supporting sword hub and cutter ring, and is further, hobbing cutter device still includes two at least outside seal structure of locating bearing assembly. The bearing assembly is arranged, so that the bearing capacity of the hobbing cutter device can be improved, and the hobbing cutter device is prevented from being damaged by large deformation, cracking and the like when hard rock is excavated; in addition, compared with the sealing structure with the traditional structure which is too simple, the hobbing cutter device provided by the embodiment of the utility model is provided with at least two sealing structures outside the bearing assembly, on one hand, the purpose of protecting the bearing assembly can be achieved, thereby solving the problem that the external dust influences the working stability and reliability of the bearing assembly in the tunneling process; on the other hand, the sealing performance of the inner cavity where the bearing assembly is located can be guaranteed, so that the dynamic sealing reliability of the hob and the bearing capacity of the hob device can be improved, and the requirement that the hob digs in a high-water-pressure stratum is met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hob apparatus provided in an embodiment of the present invention.

Wherein:

1-cutter hub, 2-cutter ring, 3-retainer ring, 4-cutter shaft, 5-bearing, 501-outer ring, 502-inner ring, 6-spacer ring, 7-shaft shoulder end cover, 8-thread end cover, 9-thread baffle, 101-first polyurethane sealing element, 102-second polyurethane sealing element, 11-rotary metal ring, 12-O-shaped ring, 13-floating metal ring, 14-floating sealing ring, 15-pressure regulating piston and 16-shaft end screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

The core of the utility model is to provide a hobbing cutter device, this hobbing cutter device can improve bearing capacity to avoid appearing the damage condition such as big deformation or fracture when excavating the hard rock, simultaneously, can also improve hobbing cutter dynamic seal reliability and bearing capacity, thereby satisfy the demand that the hobbing cutter tunnelled in high water pressure stratum.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a hob device according to an embodiment of the present invention.

The embodiment of the utility model provides a hobbing cutter device, including sword hub 1, cutter ring 2, retaining ring 3 and arbor 4, the top of hobbing cutter device is located to sword hub 1, cutter ring 2 and retaining ring 3, and cutter ring 2 installs on sword hub 1, and retaining ring 3 locates one side of cutter ring 2 and cooperates with the contact of cutter ring 2, and retaining ring 3 is used for realizing radially spacing to cutter ring 2 to guarantee the stability and the reliability of hobbing cutter tunnelling process.

The cutter ring 2 is used as a direct part of the hob for rock breaking, a single cutter ring 2 can be arranged, namely, the single-edge hob is obtained, under the condition that the structure of other parts is not changed, the number of the cutter ring 2 can be set to be more than or equal to two by changing the design of the cutter hub 1 and the retainer ring 3, namely, the multiple-edge hob is obtained, and the number of the cutter ring 2 can be changed to better adapt to different rock stratum geology and specific engineering requirements. The assembly of the hob apparatus is described in detail herein with only a single cutter ring 2.

And a bearing assembly is arranged between the cutter hub 1 and the cutter shaft 4 and is used for supporting the cutter hub 1 and the cutter ring 2, and when the hobbing cutter device is used for tunneling, the bearing assembly completely bears the load required by the hobbing cutter when rock is broken through rolling. The embodiment of the present invention provides an embodiment, the bearing assembly includes two relatively set bearings 5, the radial distribution of bearing 5 along the hobbing cutter device, any bearing 5 includes outer lane 501, rolling element and inner circle 502,

outer lane

501 and 2 rigid couplings of cutter ring, inner circle 502 and arbor 4 rigid coupling, so, the two relative arbor 4 rotations of tool hub 1 and cutter ring 2.

In addition, the arrangement of the left bearing 5 and the right bearing 5 can further improve the bearing capacity of the hobbing cutter device, so that the condition that the hobbing cutter device is damaged due to large deformation or cracking and the like when hard rock is excavated is avoided. Of course, the two bearings 5 may be symmetrically arranged with respect to the axis of the cutter ring 2 to ensure the stability and reliability of the operation of the cutter ring 2 during the tunneling process.

On the basis, the hobbing cutter device also comprises at least two sealing structures arranged outside the bearing assembly. Compared with the sealing structure with the traditional structure which is too simple, the hobbing cutter device provided by the embodiment of the utility model has the advantages that the hobbing cutter device is provided with at least two sealing structures outside the bearing assembly, on one hand, the purpose of protecting the bearing assembly can be achieved, thereby solving the problem that the stability and reliability of the bearing assembly work are influenced by external mud residue, water and the like in the tunneling process; on the other hand, the sealing performance of the inner cavity where the bearing assembly is located can be guaranteed, so that the dynamic sealing reliability of the hob and the bearing capacity of the hob device can be improved, and the requirement that the hob digs in a high-water-pressure stratum is met.

Further, the outside of two bearings 5 is equipped with shaft shoulder end cover 7 and screw thread end cover 8 respectively, and wherein, shaft shoulder end cover 7 and screw thread end cover 8 divide and locate hobbing cutter device's the left and right sides, and can realize the radial limiting displacement to screw thread end cover 8 through screw thread baffle 9. A first sealing structure is arranged between the shaft shoulder end cover 7 and the cutter hub 1, a second sealing structure is arranged between the threaded end cover 8 and the cutter hub 1, and the first sealing structure and the second sealing structure are external dynamic sealing of the hob.

Specifically, the first sealing structure comprises a first slot arranged on the shaft shoulder end cover 7 and a first polyurethane sealing element 101 matched with the first slot; correspondingly, the second sealing structure includes a second slot provided on the threaded end cap 8 and a second polyurethane seal 102 fitted with the second slot. In this way, the two polyurethane sealing elements are respectively installed in the corresponding slots of the shaft shoulder end cover 7 and the thread end cover 8 and distributed on two sides of the hob to jointly form the external dynamic seal of the hob.

Certainly, according to actual needs, the polyurethane sealing element can adopt a large-size lip-shaped sealing form, the polyurethane sealing element is made of polyurethane, and the polyurethane material has the characteristics of good heat resistance, strong hydrolysis resistance, small compression deformation, high wear resistance and the like, so that the two polyurethane sealing elements have the advantages of high sealing reliability and long service life.

In order to further improve the sealing reliability of the inner cavity where the bearing assembly is located, the hob device is further provided with a third sealing structure, specifically, a rotating metal ring 11 is installed in the hob hub 1, wherein the hob hub 1, the hob ring 2, the retainer ring 3 and the rotating metal ring 11 are assembled through a mutual matching relationship to form a rotating part of the hob, and the hob shaft 4, the shaft shoulder end cover 7, the threaded end cover 8 and the threaded baffle 9 are assembled through a mutual matching relationship to form a fixed part of the hob, and the assembling process can refer to the prior art, and will not be unfolded one by one here. The shaft shoulder end cover 7 and the thread end cover 8 are both provided with floating metal rings 13, that is, the number of the floating metal rings 13 is two, and the two floating metal rings 13 are respectively arranged at the inner side positions of the shaft shoulder end cover 7 and the thread end cover 8 through floating seal rings 14.

Thus, after the hob is assembled, the floating seal ring 14 is compressed, which generates an axial pressure on the floating metal ring 13, so that the floating metal ring 13 and the rotating metal ring 11 form a joint surface to form a floating seal structure, in other words, the floating metal ring 13 and the rotating metal ring 11 are joined to form a third seal structure (floating seal structure), which is the hob internal dynamic seal.

Of course, according to actual needs, the rotating metal ring 11 and the floating metal ring 13 are made of alloy materials, and can have high surface hardness, excellent surface roughness and good wear resistance through specific process treatment.

It should be noted that, the rotary metal ring 11 is installed in the cutter hub 1 and rotates along with the cutter hub when breaking rock, and the floating metal ring 13 can slightly float and adjust the position because of not being directly connected with other rigid structures, and the floating sealing structure has good sealing performance.

In addition, a plurality of O-shaped rings 12 are arranged on the shaft shoulder end cover 7, the threaded end cover 8 and the rotating metal ring 11, so that a static sealing structure can be formed, and the sealing performance of the whole hob is improved.

In order to optimize the above embodiment, a pressure adjusting cavity which is through along the axial direction is arranged inside the cutter shaft 4, two pressure adjusting pistons 15 are arranged inside the pressure adjusting cavity, the two pressure adjusting pistons 15 are separated from two sides by a small hole structure arranged in the middle of the cutter shaft 4, and the pressure adjusting pistons 15 are used for controlling the pressure balance between the inner side and the outer side of the cutter hub 1.

More specifically, in order to separate the two bearings 5, the hob device is further provided with a spacer ring 6 arranged along the axis thereof, the spacer ring 6 is used for separating the two bearings 5, the spacer ring 6 is perpendicular to the arbor 4, and the inside of the spacer ring 6 is provided with a central hole which penetrates along the axial direction thereof and communicates with the pressure adjustment chamber. Therefore, the inner cavity where the bearing 5 is located can be communicated with the pressure adjusting cavity through the central hole, and when the external pressure of the hob is higher than the pressure of the internal cavity, the pressure adjusting piston 15 slides towards the center of the pressure adjusting cavity to compress the air of the internal cavity to balance the internal pressure and the external pressure, so that the pressure difference born by the hob sealing structure is reduced, and the reliability of the hob sealing structure is improved.

In addition, shaft end screws 16 are arranged at two ends of the cutter shaft 4, so that the pressure regulating piston 15 can be prevented from sliding out; the shaft end screw 16 is provided with a through hole which is communicated with the external environment of the hob and the pressure adjusting cavity.

Compared with a single-piston structure, the double-pressure-regulating piston 15 structure has the advantages that the possibility of blocking of the pressure regulating cavity is greatly reduced, the dynamic sealing reliability of the hob can be effectively enhanced, the ultimate bearing capacity of the hob is improved, and the hob is guaranteed to stably work under the condition of high water pressure, particularly in an extremely deep vertical shaft.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

It is right above that the utility model provides a hobbing cutter device has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the solution and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a hobbing cutter device, includes cutter hub (1), cutter ring (2) and arbor (4), cutter ring (2) install in on cutter hub (1), just cutter hub (1) with the cutter ring (2) two can be relative arbor (4) rotate, its characterized in that, cutter hub (1) with be equipped with between arbor (4) and be used for supporting cutter hub (1) with the bearing assembly of cutter ring (2), still include two at least locate the outside of bearing assembly, be used for guaranteeing bearing assembly place inner chamber's sealing performance's seal structure.

2. The hob apparatus according to claim 1, characterized in that the bearing assembly comprises two bearings (5) arranged opposite each other, an outer ring (501) of any one of the bearings (5) being fixedly connected to the hub (1) and an inner ring (502) being fixedly connected to the shaft (4).

3. The hob apparatus according to claim 2, characterized in, that two of the bearings (5) are arranged symmetrically with respect to the axis of the cutter ring (2).

4. The hobbing cutter device according to claim 2, characterized in that the two bearings are externally provided with a shoulder end cap (7) and a threaded end cap (8), respectively, a first sealing structure is arranged between the shoulder end cap (7) and the cutter hub (1), and a second sealing structure is arranged between the threaded end cap (8) and the cutter hub (1).

5. The hob apparatus according to claim 4, characterized in, that the hub (1) is mounted with a rotating metal ring (11), both the shoulder cap (7) and the threaded end cap (8) are mounted with a floating metal ring (13), either floating metal ring (13) fitting with the rotating metal ring (11) to form a third sealing structure.

6. The hob apparatus according to claim 4, characterized in that the first sealing structure comprises a first slot provided on the shaft shoulder end cap (7) and a first polyurethane seal (101) cooperating with the first slot.

7. The hob apparatus according to claim 6, characterized in that the second sealing structure comprises a second slot provided on the threaded end cap (8) and a second polyurethane seal (102) cooperating with the second slot.

8. The hob device according to claim 5, characterized in, that the shoulder cap (7), the threaded end cap (8) and the rotating metal ring (11) are provided with a number of O-rings (12).

9. The hob device according to any one of the claims 2 to 8, characterized in, that the inside of the arbor (4) is provided with a pressure adjustment chamber running through in its axial direction, and that the inside of the pressure adjustment chamber is provided with two pressure adjustment pistons (15) for controlling the pressure balance inside and outside the hub (1).

10. The hob apparatus according to claim 9, characterized in that the cutter shaft (4) is connected with a spacer ring (6) arranged in the axial direction of the cutter ring (2) for separating the two bearings (5), and the spacer ring (6) is provided with a central hole running through the spacer ring in the axial direction thereof and communicating with the pressure adjustment chamber.