CN114483774A

CN114483774A - Main bearing of shaft boring machine and assembling method thereof

Info

Publication number: CN114483774A
Application number: CN202210104731.5A
Authority: CN
Inventors: 刘飞香; 程永亮; 胡斌; 麻成标; 魏玎; 邢嘉树; 许正根; 刘华
Original assignee: China Railway Construction Heavy Industry Group Co Ltd
Current assignee: China Railway Construction Heavy Industry Group Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-05-13

Abstract

The invention provides a main bearing of a shaft boring machine, which comprises a first outer ring, a second outer ring, an inner ring, a main pushing assembly, an auxiliary pushing assembly and a radial assembly, wherein the main pushing assembly comprises a first bearing body and a second bearing body; the first outer ring is sleeved on the inner ring, and a main pushing raceway for mounting a main pushing assembly and a radial raceway for mounting a radial assembly are formed between the inner wall of the first outer ring and the outer wall of the inner ring; the second outer ring is sleeved on the inner ring, and an auxiliary pushing raceway for mounting an auxiliary pushing assembly is formed between the inner wall of the second outer ring and the outer wall of the inner ring; the main pushing assembly comprises a plurality of main pushing rollers and a main pushing retainer for mounting the main pushing rollers, and the main pushing retainer is arranged in a sectional manner; the auxiliary pushing assembly comprises an auxiliary pushing sliding block which is arranged in a sectional mode; the radial assembly comprises a radial slide block in a segmented arrangement.

Description

Main bearing of shaft boring machine and assembling method thereof

Technical Field

The invention relates to the technical field of heading machines, in particular to a main bearing of a vertical shaft heading machine and an assembling method thereof.

Background

The shaft engineering of the vertical shaft is an important component of underground engineering of coal mines, metal and nonmetal mines, hydroelectric and pumped storage power stations, subways, highways, railway tunnels and the like, and is widely applied to industries such as coal industry, metal mines and the like. In the last decade, the underground space in our country has been developed more and more rapidly and the utilization scale thereof has become larger and larger, and in the process, a large number of vertical shafts are required to be constructed as underground structures thereof.

At present, the shaft full-face tunnel boring machine is widely applied to shaft construction, and a main bearing structure of a key part is a three-row roller bearing. At present, three rows of roller bearings for the development machine mostly depend on import, have high cost and long order cycle, and become important factors for restricting the development of the shield in China.

The common three-row roller bearing can bear axial force, radial force and overturning moment, but the force borne by the main bearing of the shaft boring machine is generally axial force and a small amount of overturning moment, and the stress positions of the bearings are different. Therefore, if a general three-row roller bearing is applied to a shaft, redundancy in performance of the main bearing is caused, and cost is increased.

Therefore, how to design a main bearing suitable for being used in a shaft boring machine is a problem to be solved urgently by those skilled in the art at present.

Disclosure of Invention

The invention provides a main bearing of a shaft boring machine, which comprises a first outer ring, a second outer ring, an inner ring, a main pushing assembly, an auxiliary pushing assembly and a radial assembly, wherein the main pushing assembly comprises a first bearing body and a second bearing body;

the first outer ring is sleeved on the inner ring, and a main pushing raceway for mounting a main pushing assembly and a radial raceway for mounting a radial assembly are formed between the inner wall of the first outer ring and the outer wall of the inner ring;

the second outer ring is sleeved on the inner ring, and an auxiliary pushing roller path for mounting an auxiliary pushing assembly is formed between the inner wall of the second outer ring and the outer wall of the inner ring;

the main pushing assembly comprises a plurality of main pushing rollers and a main pushing retainer for mounting the main pushing rollers, and the main pushing retainer is arranged in a sectional manner;

the auxiliary pushing assembly comprises an auxiliary pushing sliding block which is arranged in a sectional mode;

the radial assembly comprises a radial slide block in a segmented arrangement.

Optionally, a plurality of cavities for mounting the main push rollers are arranged on the main push retainer, two adjacent cavities are arranged at intervals, and at least one row of main push rollers is arranged in a single cavity.

Optionally, a plurality of axial oil holes and radial oil holes which are communicated with each other are formed in the first outer ring, and the axial oil holes are connected with the radial oil holes and the oil conveying device.

Optionally, the auxiliary pushing sliding block and the radial sliding block are both made of wear-resistant materials.

Optionally, a plurality of first counter bores for mounting the first countersunk head bolts are arranged on the auxiliary push sliding block, and threaded holes for matching with the first countersunk head bolts are arranged on the inner wall surface of the second outer ring for contacting with the auxiliary push sliding block.

Optionally, the radial sliders are both arranged in a zigzag structure, second counter bores and threaded holes for mounting the same group of second counter bore bolts are respectively arranged at the connecting parts of two adjacent radial sliders, and the two adjacent radial sliders are connected with each other through the second counter bore bolts to form a radial assembly.

Optionally, a first oil groove is formed in the end face, which is used for being in contact with the inner wall of the second outer ring, of the auxiliary push sliding block and the end face, which is used for being in contact with the outer wall of the inner ring, of the auxiliary push sliding block, and the first oil groove is communicated with the radial oil hole.

Optionally, a second oil groove is formed in the end face of the radial sliding block, which is used for being in contact with the inner wall of the first outer ring, and the end face of the radial sliding block, which is used for being in contact with the outer wall of the inner ring, and the second oil groove is communicated with the radial oil hole.

Optionally, gaps of 0.3mm to 0.5mm are respectively arranged between the inner wall of the second outer ring and the auxiliary pushing sliding block and between the auxiliary pushing sliding block and the outer wall of the inner ring.

Optionally, gaps of 0.2mm to 0.4mm are also respectively arranged between the inner wall of the first outer ring and the radial sliding block and between the radial sliding block and the outer wall of the inner ring.

Optionally, the first oil groove is provided with a plurality of mutual intervals, and the second oil groove is provided with a plurality of mutual intervals.

Optionally, the plurality of first oil grooves and the plurality of second oil grooves are both arranged in an inner arc structure.

The invention also provides an assembling method of the main bearing of the shaft boring machine, which is used for installing the main bearing of the shaft boring machine and comprises the following steps:

step one, installation preparation: cleaning the surfaces of all parts, so that the surfaces of all parts have no oil stain, rust and impurities, and respectively installing a main push retainer and an auxiliary push assembly to form a main push retainer integral structure, an auxiliary push assembly integral structure and a radial assembly integral structure; the first outer ring and the second outer ring are arranged on the mounting platform in a mode that the end face of the first outer ring, which is connected with the second outer ring, faces upwards;

step two, sequentially installing a main push retainer, a main push roller, an inner ring and radial sliders, and mutually connecting every two adjacent radial sliders after adjusting the positions of the radial sliders to form an integral structure of a radial assembly;

thirdly, placing the second outer ring on the mounting platform in a mode that the end face of the second outer ring, which is used for being connected with the first outer ring, faces upwards;

step four, installing an auxiliary pushing assembly;

turning over the second outer ring, and hoisting the second outer ring to the first outer ring;

and step six, mutually connecting the second outer ring and the first outer ring to complete the installation of the main bearing of the shaft boring machine.

Compared with the prior art, the invention has the following beneficial effects:

according to the main bearing of the shaft boring machine, the auxiliary push sliding block and the radial sliding block are arranged, so that the structure of the main bearing of the shaft boring machine is simplified on the premise of ensuring the normal transmission and bearing performance of the shaft boring machine, the machining difficulty of the main bearing of the shaft boring machine and the heat treatment difficulty of a raceway are reduced, and the cost is reduced.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

figure 1 is a schematic cross-sectional view of the main bearing of a shaft boring machine according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of the main push assembly of FIG. 1;

FIG. 3 is a schematic view of the auxiliary push assembly of FIG. 1;

fig. 4 is a partial schematic view of the radial assembly of fig. 1.

Wherein:

1. the device comprises a first outer ring, a second outer ring, a first inner ring, a second outer ring, a connecting bolt, a first pushing assembly, a second outer ring, a third outer ring, a fourth outer ring, a fifth outer ring, a sixth outer ring, a fifth outer ring, a sixth outer ring, a fourth outer ring, a sixth outer ring, a sixth outer, a fourth outer, a sixth outer, a fourth outer, a sixth outer, a fourth outer, a sixth, a fourth outer, a sixth, a fourth outer.

Detailed Description

In order to make the aforementioned objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the present invention are simplified and are not to precise scale, and are provided for convenience and clarity in assisting the description of the embodiments of the present invention; the several references in this disclosure are not limited to the particular numbers in the examples of the figures; the directions or positional relationships indicated by ' front ' middle, ' rear ' left ', right ', upper ', lower ', top ', bottom ', middle ', etc. in the present invention are based on the directions or positional relationships shown in the drawings of the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction, nor should be construed as limiting the present invention.

Example (b):

referring to fig. 1, the main bearing of the heading machine provided by the invention comprises a first outer ring 1, a second outer ring 2, an inner ring 3, a main pushing assembly 5, an auxiliary pushing assembly 6 and a radial assembly 7;

the first outer ring 1 is sleeved on the inner ring 3, and a main pushing raceway used for installing a main pushing component 5 and a radial raceway used for installing a radial component 7 are formed between the inner wall of the first outer ring 1 and the outer wall of the inner ring 3;

the second outer ring 2 is sleeved on the inner ring 3, and an auxiliary pushing raceway for installing an auxiliary pushing assembly 6 is formed between the inner wall of the second outer ring 2 and the outer wall of the inner ring 3. Preference is given here to: the first outer ring 1 and the second outer ring 2 are connected with each other through a connecting bolt 4 to form an outer ring assembly; a plurality of axial oil holes 8 and radial oil holes 9 which are communicated with each other are formed in the first outer ring 1, and the axial oil holes 8 connect the radial oil holes 9 with an oil delivery device (the oil delivery device refers to the structure in the prior art).

Referring to fig. 2, the main pushing assembly 5 includes a plurality of main pushing rollers 5.1 and a main pushing cage 5.2 for mounting the plurality of main pushing rollers 5.1, the main pushing cage 5.2 is preferably arranged in a sectional manner, and a plurality of cavities for mounting the main pushing rollers 5.1 are arranged on the main pushing cage 5.2. Preference is given here to: the two adjacent cavities are arranged at intervals to prevent friction between the two adjacent main push rollers 5.1; two rows of main pushing rollers 5.1 are preferably arranged in the single accommodating cavity, and the diameters of the main pushing rollers 5.1 are different (the diameter of the main pushing roller 5.1 is preferably set to be 70mm-100mm) corresponding to the main bearings of the shaft boring machine under different working conditions.

Referring to fig. 3, the auxiliary pushing assembly 6 comprises a plurality of interconnected auxiliary pushing blocks 6.1 and a plurality of first oil grooves arranged on the auxiliary pushing blocks 6.1; the auxiliary push sliding block 6.1 is made of wear-resistant materials, a plurality of first counter bores 6.2 used for mounting first counter bolts are formed in the auxiliary push sliding block 6.1, and threaded holes used for being matched with the first counter bolts are formed in the inner wall face, in contact with the auxiliary push sliding block 6.1, of the second outer ring 2; a plurality of first oil grooves set up respectively and assist and push away on the terminal surface that slider 6.1 is used for contacting with the inner wall of second outer lane 2 and assist and push away slider 6.1 and be used for contacting with the outer wall of inner circle 3 on the terminal surface, and a plurality of first oil grooves all communicate each other with radial oilhole 9 to lubricating oil flows to assisting and pushes away slider 6.1 on the surface through axial oilhole 8, radial oilhole 9, in order to assist between the inner wall of pushing away slider 6.1 and second outer lane 2, assist and push away and carry out lubrication treatment between slider 6.1 and the outer wall of inner circle 3. Preference is given here to: in order to realize the fastening connection between the auxiliary push sliding block 6.1 and the second outer ring 2, a first anti-loosening gasket is also arranged in the first counter bore 6.2; in order to realize the processing and the loading of the auxiliary pushing sliding block 6.1, the auxiliary pushing sliding block 6.1 is arranged in a sectional mode; in order to facilitate that lubricating oil can enter between the auxiliary push sliding block 6.1 and the inner wall of the second outer ring 2 and between the auxiliary push sliding block 6.1 and the outer wall of the inner ring 3, gaps of 0.3mm-0.5mm are further arranged between the inner wall of the second outer ring 2 and the auxiliary push sliding block 6.1 and between the auxiliary push sliding block 6.1 and the outer wall of the inner ring 3, so that a good lubricating effect is ensured, and vibration of the main bearing of the shaft boring machine in the operation process cannot be increased due to the arrangement of the gaps.

Referring to fig. 4, the radial assembly 7 includes a plurality of radial sliders 7.1 connected to each other and a plurality of second oil grooves formed in the radial sliders 7.1, the radial sliders 7.1 are made of wear-resistant materials, the plurality of radial sliders 7.1 are arranged in a matched zigzag structure, a second counter bore and a threaded hole for mounting a second counter bore bolt are respectively formed in a connection portion of each two adjacent radial sliders 7.1, and the two adjacent radial sliders 7.1 are connected to each other through the second counter bore bolt to form the radial assembly 7; the plurality of second oil grooves are respectively arranged on the end face of the radial sliding block 7.1, which is used for being in contact with the inner wall of the first outer ring 1, and the end face of the radial sliding block 7.1, which is used for being in contact with the outer wall of the inner ring 3, and are communicated with the radial oil hole 9, so that lubricating oil flows to the surface of the radial sliding block 7.1 through the axial oil hole 8 and the radial oil hole 9, and lubricating treatment is carried out between the radial sliding block 7.1 and the inner wall of the first outer ring 1 and between the radial sliding block 7.1 and the outer wall of the inner ring 3. Preference is given here to: the radial component 7 is arranged in the radial roller path in a clamping mode so as to facilitate the assembly and disassembly of the radial component 7; in order to realize the processing and the loading of the radial slide block 7.1, the radial slide block 7.1 is arranged in a sectional mode; in order to realize the fastening connection between two adjacent radial sliding blocks 1.1, a second anti-loosening gasket is also arranged in the second counter bore; in order to facilitate that lubricating oil can enter between the radial sliding blocks 7.1 and the inner wall of the first outer ring 1 and between the radial sliding blocks 7.1 and the outer wall of the inner ring 3, gaps of 0.2mm-0.4mm are arranged between the inner wall of the first outer ring 1 and the radial sliding blocks 7.1 and between the radial sliding blocks 7.1 and the outer wall of the inner ring 3, so that a good lubricating effect is ensured, and vibration of the main bearing of the shaft boring machine cannot be increased in the operation process due to the arrangement of the gaps.

Optionally, a plurality of first oil grooves preferably adopt the mode setting of mutual interval, and a plurality of second oil grooves preferably adopt the mode setting of mutual interval, and a plurality of first oil grooves and a plurality of second oil grooves all preferably set up to interior circular arc structure.

The invention also provides an assembly method of the main bearing of the shaft boring machine, which comprises the following steps:

cleaning all parts of a main bearing of the shaft boring machine to ensure that the surface has no oil stain, rust and impurity;

placing the small end face of the first outer ring (namely the end face used for being connected with the second outer ring, and the small end face of the first outer ring is provided with a hoisting hole) on a platform or a plurality of supports upwards to ensure stable and reliable placement;

thirdly, placing a main push retainer on the first outer ring main push roller path;

step four, stably placing the main push roller in a pocket hole of a main push retainer; before the main pushing roller is placed, a rubber pad is placed on the main pushing roller path to prevent the roller from sliding off to damage parts; after the main pushing roller is placed, the rubber pad is pulled out, and meanwhile, the effective installation of the main pushing roller is guaranteed;

step five, placing the inner ring on a main pushing roller (the inner ring main pushing raceway is in contact with the main pushing roller), wherein the step is preferably as follows: an adjustable lifting appliance (a chain block) is used for lifting the inner ring so as to ensure that the inner ring falls horizontally and stably and avoid damaging parts;

step six, the radial sliding block is sequentially placed in a containing cavity formed by the first outer ring radial raceway and the inner ring radial raceway, and the preference is given here: the radial sliding block is firstly placed on one side with the larger cavity, and when the width of the cavity is gradually reduced and the radial sliding block cannot be installed, the radial position of the inner ring is moved to continue placing; after the radial sliding blocks are placed, adjusting the relative positions of the radial sliding blocks, and connecting the plurality of radial sliding blocks into a radial component integral structure by using screws;

step seven, placing the small end face of the second outer ring (namely the end face used for being connected with the first outer ring, and the small end face of the second outer ring is provided with a hoisting hole) on a platform or a plurality of supports upwards to ensure stable and reliable placement;

placing the auxiliary pushing sliding block on the second outer ring radial raceway, and fixing the auxiliary pushing sliding block on the second outer ring radial raceway through a screw;

step nine, turning over the second outer ring with the large end face upward; hoisting a second outer ring to be matched with the first outer ring, wherein taper pin holes are formed in the first outer ring and the second outer ring and are positioned through taper pins; and installing a connecting bolt to complete the installation of the main bearing of the shaft boring machine.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A main bearing of a shaft boring machine is characterized by comprising a first outer ring (1), a second outer ring (2), an inner ring (3), a main pushing assembly (5), an auxiliary pushing assembly (6) and a radial assembly (7);

the first outer ring (1) is sleeved on the inner ring (3), and a main push raceway for mounting a main push component (5) and a radial raceway for mounting a radial component (7) are formed between the inner wall of the first outer ring (1) and the outer wall of the inner ring (3);

the second outer ring (2) is sleeved on the inner ring (3), and an auxiliary pushing raceway for mounting an auxiliary pushing assembly (6) is formed between the inner wall of the second outer ring (2) and the outer wall of the inner ring (3);

the main pushing assembly (5) comprises a plurality of main pushing rollers (5.1) and a main pushing retainer (5.2) used for installing the main pushing rollers (5.1), and the main pushing retainer (5.2) is arranged in a sectional mode;

the auxiliary pushing assembly (6) comprises an auxiliary pushing sliding block (6.1) which is arranged in a sectional mode;

the radial assembly (7) comprises a radial sliding block (7.1) which is arranged in a sectional mode.

2. Shaft boring machine main bearing according to claim 1, characterized in that a plurality of cavities for mounting the main thrust rollers (5.1) are provided on the main thrust cage (5.2), two adjacent cavities are arranged at a distance from each other, and at least one row of main thrust rollers (5.1) is provided in a single cavity.

3. Shaft boring machine main bearing according to claim 1 or 2, characterized in that a plurality of axial oil holes (8) and radial oil holes (9) are provided in the first outer ring (1) in communication with each other, the axial oil holes (8) connecting the radial oil holes (9) and the oil delivery means.

4. Shaft boring machine main bearing according to claim 3, characterized in that the auxiliary push slider (6.1) and the radial slider (7.1) are both made of wear-resistant material.

5. The main bearing of the shaft boring machine according to claim 4, characterized in that a plurality of first counter bores (6.2) for mounting first counter bolts are arranged on the auxiliary push sliding block (6.1), and threaded holes for matching with the first counter bolts are arranged on the inner wall surface of the second outer ring (2) for contacting with the auxiliary push sliding block (6.1);

the radial sliding blocks (7.1) are all arranged to be of a Z-shaped structure, second counter bores and threaded holes used for installing the same group of second countersunk head bolts are respectively formed in the connecting parts of the two adjacent radial sliding blocks (7.1), and the two adjacent radial sliding blocks (7.1) are connected with each other through the second countersunk head bolts to form a radial assembly (7).

6. Shaft boring machine main bearing according to claim 4 or 5, characterized in that a first oil groove is provided on the end face of the auxiliary push slider (6.1) for contacting the inner wall of the second outer ring (2) and on the end face of the auxiliary push slider (6.1) for contacting the outer wall of the inner ring (3), the first oil groove communicating with the radial oil hole (9);

and a second oil groove is formed in the end face, in which the radial sliding block (7.1) is used for being in contact with the inner wall of the first outer ring (1), and the end face, in which the radial sliding block (7.1) is used for being in contact with the outer wall of the inner ring (3), and is communicated with the radial oil hole (9).

7. The shaft boring machine main bearing according to claim 6, characterized in that gaps of 0.3mm to 0.5mm are provided between the inner wall of the second outer ring (2) and the auxiliary push slider (6.1) and between the auxiliary push slider (6.1) and the outer wall of the inner ring (3);

gaps of 0.2mm-0.4mm are also arranged between the inner wall of the first outer ring (1) and the radial sliding block (7.1) and between the radial sliding block (7.1) and the outer wall of the inner ring (3).

8. A shaft boring machine main bearing according to claim 7, wherein the first oil groove is provided in plural at intervals from each other, and the second oil groove is provided in plural at intervals from each other.

9. A shaft boring machine main bearing according to claim 8, wherein the plurality of first oil grooves and the plurality of second oil grooves are each provided in an inner circular arc configuration.

10. A method of assembling a shaft boring machine main bearing for mounting the shaft boring machine main bearing according to claim 9, comprising the steps of:

step four, installing an auxiliary pushing assembly;