1. A shield machine main drive with sliding and self-stopping functions is characterized by comprising a non-circular main drive structural body (1), wherein the main drive structural body (1) is a heavy-duty welding box body which is used as an important bearing structural member of the main drive and bears the reverse thrust and the reverse torque transmitted by a cutter head in real time; the shield body (2) is matched with the main driving structure body (1) in shape, the shield body (2) matched with the main driving structure body (1) in shape is embedded and sleeved outside the box body and is tightly contacted with the inner surface of the shield body (2), and therefore the load force borne by the box body of the main driving structure body (1) is transmitted to the shield body (2); the sliding copper plate (3) is arranged in a segmented interval mode, and the sliding copper plate (3) is arranged between the main driving structure body (1) and the shield body (2), so that the sliding precision of the main driving is improved.

2. The main drive of the shield tunneling machine with the sliding and self-stopping functions according to claim 1, characterized in that: the upper end and the lower end of the outer box body of the main driving structure body (1) are planes, and the two sides of the outer box body are arc surfaces.

3. The main drive of the shield tunneling machine with the sliding and self-stopping functions according to claim 2, characterized in that: the upper end and the lower end of the inner surface of the shield body (2) are planes, and the two sides of the inner surface are arc surfaces.

4. The main drive of the shield tunneling machine with the sliding and self-stopping functions according to claim 1, characterized in that: the lower end plane of the main driving structure body (1) is provided with a first two-block sliding copper plate (3.1) which is mainly used for bearing the gravity of the main driving and the cutter head and bearing the reaction torque transmitted to the main driving by the rotation of the cutter head.

5. The main drive of the shield tunneling machine with the sliding and self-stopping functions according to claim 1, characterized in that: and four-block sliding copper plates II (3.2) are arranged on arc surfaces on two sides of the main driving structure body (1), and are mainly used for controlling the sliding axis of the main driving to be always positioned in the center of the shield body (2).

6. The main drive of the shield tunneling machine with the sliding and self-stopping functions according to claim 1, characterized in that: and a third two-block sliding copper plate (3.3) is arranged on the upper end plane of the main driving structure body (1) and is mainly used for bearing the reaction torque transmitted to the main driving by the rotation of the cutter head.

Background

The shield machine is difficult to avoid the situation that the cutter head is blocked and cannot rotate in the tunneling process. For the shield machine with the cutter head telescopic sliding function, the method of repeatedly stretching the cutter head can be used, and the forward and reverse rotation of the cutter head is assisted, so that the cutter head of the shield machine can be taken out of the trouble. At present, home and abroad shield machine manufacturers generally adopt a whole-ring sliding bearing arranged outside a circular main drive aiming at a shield machine with a cutter disc telescopic sliding function, so that the main drive has an axial sliding function, and then drives a shield machine cutter disc to realize telescopic sliding.

In order to prevent the circular ring main drive from twisting along the central axis of the main drive, referring to fig. 1, the main drive of the conventional sliding type needs a separate anti-twisting ring at the rear part of the main drive, and 4 sets of anti-rotation cylinders are mounted on the anti-twisting ring. The base of the rotation stopping oil cylinder is rigidly connected with the anti-torsion ring, and the end planes of the piston rods of the 4 groups of rotation stopping oil cylinders are tightly attached to the inner plane of the front shield of the shield machine, so that the rotation torque received by the main drive is transmitted to the shield body, and the reaction torque generated when the cutter head rotates to excavate soil is offset. The conventional sliding and anti-twisting type shield machine main drive has the advantages that the anti-twisting ring is required to be arranged on the design principle and the structural type, so that the structure of the main drive becomes more complex, the integral weight of the main drive is increased, and the sliding resistance of the main drive is increased.

The above-described conventional sliding-type main drive has the following drawbacks:

1. in order to increase the sliding precision and the bearing capacity of the main driving sliding device, a sliding bearing (a special copper sleeve) which is continuously looped needs to be arranged outside the main driving, which is equivalent to increase the manufacturing cost of the main driving sliding device.

2. The 4 groups of high-pressure oil cylinders on the torsion-proof ring are used for transmitting the reaction torque, and the high-pressure oil cylinders are used for equivalently increasing the manufacturing cost of the main driving rotation stopping device. And the manufacturing quality of the high-pressure oil cylinder directly influences the rotation stopping effect of the main drive, which is equivalent to increasing the fault risk point of the main drive rotation stopping device.

3. The working pressure and stroke control of the 4 groups of rotation stopping oil cylinders are the key points for reliable torsion prevention of the main drive, but in practical application, due to the conditions of oil cylinder internal leakage, pipeline pressure relief and the like, insufficient or frequent fluctuation of the reaction torque provided by the 4 groups of rotation stopping oil cylinders is often caused.

4. When transient fluctuation of working torque of a cutter head of the shield tunneling machine is increased, working pressure and telescopic stroke of 4 groups of rotation stopping oil cylinders are difficult to match with the change of the torque of the cutter head in real time and adjust in time, and the actual control speed and control precision of the rotation stopping oil cylinders are inevitably lagged behind the change of the working torque of the cutter head, so that the main driving rotation stopping device cannot achieve the function of stabilizing and preventing torsion. Based on the above, the invention designs the main drive of the shield machine with the functions of sliding and self-stopping rotation so as to solve the problems.

Disclosure of Invention

The invention aims to provide a main drive of a shield machine with sliding and self-stopping functions, wherein the main drive has an axial sliding function, and the main drive structure type has a self-anti-twisting function. The novel main driving structure is very suitable for the shield machine with the cutter head telescopic sliding function.

In order to achieve the purpose, the invention provides the following technical scheme: a shield machine main drive with sliding and self-rotation stopping functions comprises a non-circular main drive structural body, wherein the main drive structural body is a heavy-duty welding box body which is used as an important bearing structural member of the main drive and bears the reverse thrust and the reverse torque transmitted by a cutter head in real time; the shield body is matched with the main driving structure in shape, and the shield body matched with the main driving structure in shape is embedded outside the box body of the main driving structure and is tightly contacted with the inner surface of the shield body, so that the load force borne by the box body of the main driving structure is transmitted to the shield body; the sliding copper plate is arranged in a segmented interval mode, and the sliding copper plate is arranged between the main driving structure body and the shield body, so that the sliding precision of the main driving is improved.

Preferably, the upper end and the lower end of the main drive structure body outer box body are planes, and the two sides of the main drive structure body outer box body are arc surfaces.

Preferably, the upper end and the lower end of the inner surface of the shield body are planes, and two sides of the inner surface are arc surfaces.

Preferably, the lower end plane of the main driving structure body is provided with a first two-block sliding copper plate which is mainly used for bearing the gravity of the main driving and the cutter head and bearing the reaction torque transmitted to the main driving by the rotation of the cutter head.

Preferably, four-block sliding copper plates II are arranged on arc surfaces on two sides of the main driving structure body, and are mainly used for controlling the sliding axis of the main driving to be always positioned in the center of the shield body.

Preferably, a third two-block sliding copper plate is arranged on the upper end plane of the main driving structure body and is mainly used for bearing the reaction torque transmitted to the main driving by the rotation of the cutter head.

Compare with the conventional shield structure owner that generally adopts on the shield constructs quick-witted market at present and drive slip and prevent turning round structure, its advantage lies in: the invention cancels the anti-twist ring required by the rotation stopping of the main drive of the conventional shield machine, thereby simplifying the structural style of the main drive, reducing the integral weight of the main drive and further reducing the sliding resistance of the main drive.

The arrangement mode of the main driving sliding copper plate of the shield machine is optimized, and the effective bearing capacity of the main driving sliding copper plate in unit area is improved, so that the total installation quantity of the sliding copper plates is effectively reduced on the premise of not reducing the bearing capacity of the main driving sliding bearing of the shield machine, and the manufacturing cost of the main driving sliding device is further reduced.

The high-pressure oil cylinder required by the main drive rotation stopping of the conventional shield machine is omitted, so that the manufacturing cost of the main drive rotation stopping device is reduced, and the fault risk points of the main drive rotation stopping device are reduced.

The hydraulic control required by the main drive rotation stopping function of the conventional shield machine is converted into rigid mechanical control, so that the real-time performance and the stability of the main drive reaction torque response of the shield machine are realized, and the reliability of the main drive rotation preventing function of the shield machine is improved.

Drawings

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

FIG. 1 is a schematic view of a conventional sliding type main driving structure of the prior art;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of the main driving rotation stopping principle of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-a main drive structure;

2-shield body;

3-sliding copper plate, 3.1-block sliding copper plate I, 3.2-block sliding copper plate II and 3.3-block sliding copper plate III.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2-3, the present invention provides a technical solution: a shield machine main drive with sliding and self-stopping functions is characterized by comprising a non-circular main drive structural body 1, wherein the main drive structural body 1 is a heavy-duty welded box body, the upper end and the lower end of the outer box body of the main drive structural body 1 are planes, and the two sides of the outer box body are arc surfaces; the upper end and the lower end of the inner surface of the shield body 2 are planes, and the two sides of the inner surface are arc surfaces, the upper end and the lower end of the inner surface of the shield body 2 are matched with the shape of the main driving structure body 1, the outer part of the box body of the main driving structure body 1 is embedded in the shield body 2 matched with the shape of the box body, and the shield body 2 is tightly contacted with the inner surface of the shield body, so that the load force borne by the box body of the main driving structure body 1 is transmitted to the shield body 2; the sliding copper plate 3 is arranged between the main driving structure body 1 and the shield body 2 in a segmented interval mode, so that the main driving structure body 1 is ensured to be in close contact with the shield body 2, the sliding resistance between the main driving structure body and the shield body 2 is reduced, and the sliding precision of the main driving structure is improved.

Two sub-block sliding copper plates 3.1 are arranged on the lower end plane of the main driving structure body 1, and are mainly used for bearing the gravity of the main driving and the cutter head and bearing the reaction torque transmitted to the main driving by the rotation of the cutter head in the sliding process of the main driving.

Four-block sliding copper plates 3.2 are arranged on arc surfaces on two sides of the main driving structure body 1, and are mainly used for controlling the sliding axis of the main driving to be always positioned in the center of the shield body 2.

And a two-block sliding copper plate III 3.3 is arranged on the upper end plane of the main driving structure body 1 and is mainly used for bearing the reaction torque transmitted to the main driving by the rotation of the cutter head.

During the working process of the shield machine, a cutter head of the shield machine rotates to cut soil and certain reactive torque is inevitably generated. The reaction torque is directly transmitted to the main drive and drives the main drive to rotate around the central shaft. By adopting the main driving structure with the self-rotation stopping function, the reaction torque transmitted from the cutter head can be directly transmitted to the shield body 2 through the upper end plane and the lower end plane of the main driving and the sliding copper plate 3 thereof, thereby realizing the self-rotation stopping of the main driving of the shield machine.

The invention relates to a novel shield tunneling machine main drive sliding and anti-twisting structure, which is mainly realized by sliding copper plates 3 arranged at intervals outside a main drive. The weight of the main drive is mainly born by the sliding copper plate 3 arranged on the lower end plane of the main drive, and the sliding copper plate 3 arranged on the rest part is mainly used for positioning the sliding axis of the main drive, so that the sliding precision of the main drive is improved.

This shield constructs owner and drives structure of preventing twising reverse mainly through utilizing its owner to drive self structure non-circular characteristics, makes the reaction torque that the main drive received rotate by the restriction of non-circular structure to realize the self-stalling function of main drive.

The outer side of the main drive of the shield machine only needs to be provided with a plurality of sliding copper plates 3 at intervals, thereby playing the role of a sliding bearing. Meanwhile, the main drive is non-circular in structure and provided with an upper end plane and a lower end plane. After the main drive is installed in the shield body 2, the two end planes are tightly attached to the corresponding upper and lower planes in the front shield, so that the function of preventing torsion of the main drive is achieved.

The shield machine with the main drive sliding and anti-twisting structure has the self-rotation stopping function, so that an anti-twisting ring required by the rotation stopping of the main drive of the conventional shield machine can be eliminated, the structure of the main drive is simplified, the whole weight of the main drive is reduced, and the sliding resistance of the main drive is reduced.

The main drive sliding and anti-twisting structure of the shield machine is applied, the sliding bearing of the main drive is mainly born by the plane copper plate 3 arranged on the lower plane of the main drive, compared with the circular copper plate 3 required by the main drive sliding bearing of the conventional shield machine, the main drive sliding structure can convert the bearing contact of the sliding copper plate 3 from the original high-secondary line contact into the low-secondary surface contact, thereby improving the effective bearing capacity of the main drive sliding copper plate 3 in unit area, further reducing the total installation quantity of the sliding copper plate 3 and reducing the manufacturing cost of the main drive sliding device.

Compared with the conventional shield machine main drive rotation stopping structure, the shield machine with the main drive sliding and rotation preventing structure can cancel the use of the rotation stopping oil cylinder, thereby reducing the manufacturing cost of the main drive rotation stopping device and reducing the fault risk points of the main drive rotation stopping device.

The shield machine with the main drive sliding and anti-twisting structure is characterized in that the rigid structure of the main drive and the front shield is in contact with each other, and the rigid structure is in contact with the front shield to stably provide the reaction torque of the shield machine cutter head during working in real time, so that the anti-twisting of the main drive is reliably realized.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.