CN216643012U

CN216643012U - Structure is restoreed to inserted shield structure owner bearing bull gear

Info

Publication number: CN216643012U
Application number: CN202122714335.8U
Authority: CN
Inventors: 孙楠楠; 李志刚; 夏庆发; 熊永丰; 梁小龙; 谭远良; 吴友兴
Original assignee: China Railway Engineering Service Co Ltd
Current assignee: China Railway Engineering Service Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-05-31
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses an embedded type shield main bearing large gear ring repairing structure, and belongs to the technical field of shield machines. The method solves the problems that in the prior art, the repair process is complex, the repair cost is high, and stress concentration is easily generated to influence the safety performance of the large gear ring. The novel gear ring comprises a large gear ring (1) and embedded teeth (2), wherein the large gear ring (1) is provided with an installation groove (4), the shape of the installation groove (4) is matched with the shape of the lower part of the embedded teeth (2), and the embedded teeth (2) are in interference fit with the installation groove (4). The utility model discloses a lock ring, including bull gear (1), inlay tooth (2), the junction of bull gear (1) and inlay tooth (2) is provided with several screw hole (5), the lateral wall partly of screw hole (5) is located bull gear (1), and another part is located inlay tooth (2), the cooperation is provided with screw (3) in screw hole (5). The repairing method is simple, the phenomenon of stress concentration can not occur, and the repairing effect and the safety performance of the large gear ring are improved.

Description

Embedded type shield main bearing large gear ring repairing structure

Technical Field

The utility model belongs to the technical field of shield tunneling machines, and particularly relates to an embedded type shield main bearing large gear ring repairing structure.

Background

Along with the subway construction projects are continuously increased, subway lines are more and more dense, a plurality of subway line crossing phenomena exist, the geology of subway construction is more and more complex, in the construction process, the loads such as torque and the like borne by the main bearing are more and more close to the rated load designed by the large gear ring of the main bearing, microcracks often occur on the local tooth-shaped surface of the large gear ring, and the performance safety of the large gear ring is influenced.

In the prior art, for a tooth form which locally generates micro cracks or is locally damaged, a repairing method is generally adopted, wherein the damaged tooth form is replaced or cut off, and then welding surfacing repair is carried out, but the repairing method has strict process control and has the risk of scrapping. In the prior art, a method of fixing repair teeth on a large gear ring through a fixing piece and then welding and repairing is adopted, but welding processing can cause damage influence on tooth shapes of adjacent teeth, local heat treatment is needed after welding, and welding heat influence can cause local stress concentration to influence the repair effect and the performance safety of the large gear ring.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems of complex repair process, high repair cost and easy generation of stress concentration to influence the safety performance of a large gear ring in the prior art, the utility model provides an embedded type shield main bearing large gear ring repair structure, which aims to solve the problems that: the repair process is simplified, the scrapping risk is reduced, and the influence of stress concentration on the performance of the large gear ring is avoided.

The technical scheme adopted by the utility model is as follows:

the utility model provides an inserted shield constructs main bearing bull gear and restores structure, includes bull gear and inlay the tooth, be provided with the mounting groove on the bull gear, the shape of mounting groove and the shape phase-match of inlaying the tooth lower part, inlay tooth and mounting groove interference fit.

After the technical scheme is adopted, when a certain tooth on the large gear ring is damaged, the embedded tooth can be arranged on the large gear ring in an interference fit mode.

Preferably, the cross section of the mounting groove is T-shaped, one side of the mounting groove close to the embedded teeth is provided with an opening, and the width of the opening is smaller than that of the side far away from the embedded teeth.

After the optimized scheme is adopted, the T-shaped mounting groove can further limit the up-and-down movement of the embedded teeth, and the connection strength of the embedded teeth and the large gear ring is higher.

Preferably, the section of the mounting groove is conical, an opening is formed in one side close to the mosaic tooth, and the width of the opening is smaller than that of one side far away from the mosaic tooth.

Preferably, a plurality of threaded holes are formed in the joint of the large gear ring and the mosaic teeth, one part of the side wall of each threaded hole is located on the large gear ring, the other part of the side wall of each threaded hole is located on the mosaic teeth, and screws are arranged in the threaded holes in a matched mode.

After adopting this preferred scheme, through screw hole and hexagon socket head cap screw cooperation, can restrict the length direction that the embedded tooth followed the mounting groove and slide to further improve the installation intensity of embedded tooth, improve prosthetic reliability.

Preferably, the number of the threaded holes is four, and the threaded holes are respectively positioned on two sides of the bottom of the mounting groove.

Preferably, the screw is a socket head cap screw, and the depth of the threaded hole is matched with the length of the socket head cap screw.

After the preferred scheme is adopted, the screw cap does not protrude out of the plane of the large gear ring, so that the normal work of the large gear ring is prevented from being influenced.

Preferably, the gap between the large gear ring and the embedded teeth is connected by cold welding.

After the preferred scheme is adopted, the connection strength of the mosaic teeth and the large gear ring is higher, and because cold welding is carried out at normal temperature, the stress of the joint can be uniformly distributed on all rubber surfaces, the phenomenon of stress concentration can not occur, the fatigue strength is improved, and the safety performance of the large gear ring is improved.

Preferably, the mosaic teeth are made of the same material as the large gear ring.

Preferably, in step 6, the number of the threaded holes is 4, and the threaded holes are respectively located at two ends of the bottom of the connecting part of the mosaic tooth and the mounting groove.

Preferably, in step 6, the screw is a socket head cap screw, and a nut of the socket head cap screw does not protrude out of the plane of the large gear ring.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. according to the utility model, the embedded teeth are arranged on the large gear ring in an interference fit and screw connection mode, the repairing method is simple, the process is reliable, the cost is lower, the connecting strength of the embedded teeth and the large gear ring is high, welding is not needed, the tooth form of adjacent teeth cannot be damaged and influenced, the phenomenon of stress concentration cannot occur, and the repairing effect and the safety performance of the large gear ring are improved.

2. The mounting groove is T-shaped, the up-and-down movement of the mosaic teeth can be further limited, and the connection strength of the mosaic teeth and the large gear ring is higher.

3. After the mosaic tooth is cooled by liquid nitrogen, the volume is reduced, and after the mosaic tooth is installed on the installation groove, along with the rise of temperature, the volume of the mosaic tooth is gradually increased, so that the mosaic tooth is tightly connected with the installation groove. The method is convenient to install, and the embedded teeth can be installed on the installation grooves only by small force.

4. Through screw hole and screw cooperation, can restrict the length direction that the inserted tooth followed the mounting groove and slide to further improve the installation intensity of inserted tooth, improve prosthetic reliability.

5. The nut of the socket head cap screw does not protrude out of the plane of the large gear ring, so that the normal work of the large gear ring is prevented from being influenced.

6. The gaps between the embedded teeth and the large gear ring are processed by cold welding, the connection strength of the embedded teeth and the large gear ring is higher, and the stress of the joints can be uniformly distributed on all rubber surfaces because the cold welding is carried out at normal temperature, so that the phenomenon of stress concentration can not occur, the fatigue strength is improved, and the safety performance of the large gear ring is improved.

Drawings

The utility model will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the structure of a mounting groove in embodiment 1;

fig. 3 is a schematic structural view of the mounting groove in embodiment 2.

The novel gear ring comprises 1-a large gear ring, 2-an embedded tooth, 3-a hexagon socket screw, 4-an installation groove and 5-a threaded hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that a product of the present invention is usually placed in when used, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The present invention is described in detail below with reference to fig. 1-3.

Example 1

The utility model provides an inserted shield constructs big ring gear restoration structure of base bearing, includes big ring gear 1 and mosaic tooth 2, mosaic tooth 2 and big ring gear 1 adopt the same material to make. Be provided with mounting groove 4 on bull gear 1, mounting groove 4's cross sectional shape is the T style of calligraphy, is close to one side opening of inlay tooth 2, and the width of opening part is less than the width of keeping away from 2 one side of inlay tooth. The shape of 2 lower parts of embedded tooth and the mounting groove 4 phase-match of T style of calligraphy, embedded

tooth

2 and 4 interference fit of mounting groove.

The junction of bull gear 1 and inserted tooth 2 is provided with four screw hole 5, the screw hole is the blind hole, respectively is provided with two in inserted tooth 2's both sides, and the screw hole is located two angle departments of inserted tooth 2 and mounting groove bottom. One part of the side wall of the threaded hole 5 is positioned on the large gear ring 1, the other part of the side wall of the threaded hole is positioned on the mosaic teeth 2, and a screw 3 is arranged in the threaded hole 5 in a matched mode. In another embodiment, the number of the threaded holes may be 6 or 8, and it is sufficient to ensure that a part of the hole walls of the threaded holes is located on the mosaic teeth 2 and a part of the hole walls of the threaded holes is located on the large gear ring 1.

In this embodiment, the screw is a socket head cap screw, and the depth of the threaded hole 5 matches with the length of the socket head cap screw, so as to ensure that the nut of the socket head cap screw does not protrude out of the plane where the large gear ring is located. In another embodiment, cross or in-line screws may be used.

In this embodiment, the gap between the large gear ring 1 and the insert teeth 2 is connected by cold welding, so as to avoid the stress concentration phenomenon.

Example 2

The present embodiment is basically the same as the embodiment 1, and the difference is that:

as shown in fig. 3, in the present embodiment, the mounting groove 4 has a tapered cross section, and an opening is formed at a side close to the insert 2, and the width of the opening is smaller than the width of a side far from the insert 2.

The utility model provides an embedded type shield main bearing large gear ring repairing structure, which is completed by adopting the following method:

step 1: analyzing the material of the large gear ring: cutting and sampling the damaged teeth, and carrying out chemical component analysis on the samples to determine the chemical components of the inlaid teeth (because the main bearing large gear ring usually does not know what the used raw materials are when the shield machine is maintained, the material analysis is carried out);

step 2: analyzing and designing the shape of the tooth profile: determining the shape and size of the tooth profile of the embedded tooth by using a three-dimensional laser scanner, making a sample plate according to the determined shape and size of the tooth profile and chemical components, comparing the made sample plate with the tooth on the large gear ring, and modifying the shape of the embedded tooth according to the comparison result;

and step 3: processing an installation groove for installing the embedded teeth on the large gear ring;

and 4, step 4: according to the shape, the size and the chemical components of the tooth shape, the processing of the mosaic tooth is carried out in a processing factory, and the mosaic tooth 2 is subjected to heat treatment after the processing is finished; the embedded teeth 2 are separately processed, and then are subjected to heat treatment after being processed, and then are embedded after the heat treatment is finished, so that the size requirement of mechanical processing equipment and the size requirement of heat treatment equipment are lower;

and 5: mounting the heat-treated embedded teeth and the mounting groove in interference fit;

step 6: set up the several screw hole in the junction of mosaic tooth and bull gear, the pore wall of screw hole partly is located mosaic tooth, and another part is located the mounting groove, to mounting screw in the screw hole to restriction mosaic tooth 2 takes place relative displacement along mounting groove length direction with bull gear 1, reinforcing mosaic tooth and bull gear's joint strength.

The specific operation of step 5 is as follows: and cooling the mosaic tooth by using liquid nitrogen, pressing the cooled mosaic tooth into the mounting groove from the side surface of the mounting groove through pressing equipment or manpower, and then waiting for the slow temperature rise of the mosaic tooth to normal temperature.

After the socket head cap screws are installed, cold welding is carried out on gaps between the embedded teeth and the large gear ring, the connection strength of the embedded teeth 2 and the large gear ring 1 is further improved, and stress concentration is not generated.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which all belong to the protection scope of the present application.

Claims

1. The utility model provides an inserted shield constructs main bearing bull gear and restores structure, a serial communication port, including bull gear (1) and inlay tooth (2), be provided with mounting groove (4) on bull gear (1), the shape of mounting groove (4) and the shape phase-match of inlaying tooth (2) lower part, inlay tooth (2) and mounting groove (4) interference fit, bull gear (1) is provided with several screw hole (5) with the junction of inlaying tooth (2), the lateral wall part of screw hole (5) is located bull gear (1), and another part is located inlays tooth (2), the cooperation is provided with screw (3) in screw hole (5).

2. The mosaic type shield main bearing large gear ring repairing structure according to claim 1, wherein the cross-sectional shape of the mounting groove (4) is T-shaped, one side of the mounting groove close to the mosaic teeth (2) is provided with an opening, and the width of the opening is smaller than that of the side far away from the mosaic teeth (2).

3. The mosaic type shield main bearing large gear ring repairing structure according to claim 1, wherein the section of the mounting groove (4) is conical, the side close to the mosaic teeth (2) is opened, and the width of the opening is smaller than the width of the side far away from the mosaic teeth (2).

4. The mosaic type shield main bearing large gear ring repairing structure according to claim 1, wherein the number of the threaded holes (5) is four, and the threaded holes are respectively positioned on two sides of the bottom of the mounting groove (4).

5. The mosaic type shield main bearing large gear ring repairing structure according to claim 1, wherein the screws are socket head cap screws, and the depth of the threaded holes (5) is matched with the length of the socket head cap screws.

6. The structure for repairing the large gear ring of the embedded shield main bearing according to claim 1, wherein the large gear ring (1) and the gaps of the embedded teeth (2) are connected by cold welding.

7. The mosaic type shield main bearing large gear ring repairing structure according to claim 1, wherein the mosaic teeth (2) are made of the same material as the large gear ring (1).