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TBM hybrid main bearing structure

A main bearing and axial technology, which is applied in the direction of rolling contact bearings, rotating bearings, bearings, etc., can solve the problems that the life of the main bearing cannot meet the requirements of use, and achieve the effect of large bearing capacity, stable operation and long life

Active Publication Date: 2020-03-27
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a TBM hybrid main bearing structure, which solves the problem that the life of the existing conventional main bearing cannot meet the service requirements

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as Figures 1 to 4 As shown, a TBM hybrid main bearing structure includes a stator 1 and a rotor. Between the stator 1 and the rotor, there are fluid lubricating parts and rolling elements in the axial direction, radial direction or axial and radial directions, and the position of sliding fit can be selected according to the needs, so as to resist different axial forces or radial forces. A gap is formed between the fluid lubricating part and the rotor, and the fluid lubricating part can form a lubricating film layer in the gap to realize the sliding fit between the stator and the rotor. Fluid lubricating parts and rolling elements are arranged alternately to ensure uniform sliding force. The fluid lubricating parts are oil cushions or air cushions, which play the main role of bearing pressure. The rolling elements are rollers or balls, which play the role of auxiliary pressure bearing. In the working state, oil is supplied to the oil cushion or air is supplied t...

Embodiment 2

[0029] Such as Figures 1 to 5 As shown, a TBM hybrid main bearing structure includes a stator 1 and a rotor, and the stator 1 includes a main thrust surface in the axial direction, an auxiliary thrust surface and a radial surface in the radial direction. The rotor includes a rotor I8 and a rotor II9, and the rotor I8 and the rotor II9 are detachably connected. Two rows of thrust bearings and one row of radial bearings are arranged between the stator and the rotor. Both the stator 1 and the rotor are ring-shaped, the stator is connected to the frame through bolts, and the rotor is connected to the cutter head through bolts, so as to be installed on the tunnel boring machine.

[0030] The main thrust bearing is arranged on the stator 1 by the main thrust oil pad 2 and the main thrust roller 3 in a circular crossing. The two share the track surface on the rotor I8. A gap S1 is formed between the main thrust oil pad 2 and the rotor I8 to facilitate the formation of a pressure oi...

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Abstract

The invention provides a TBM hybrid main bearing structure. The TBM hybrid main bearing structure comprises a stator, a fluid lubricating part and a rolling body are arranged between the stator and arotor, and a clearance is formed between the fluid lubricating part and the rotor. The TBM hybrid main bearing structure has the advantages that a fluid hydrostatic bearing and a rolling body bearingare arranged in a staggered manner, the hydrostatic bearing is adopted as a main bearing bearing, and a roller bearing is complementarily adopted for providing auxiliary supporting. The TBM hybrid main bearing structure has the advantages of being stable in operation, long in service life and high in bearing capacity. The requirements of super-long tunnels and extra-hard rock geologies for the service life and heavy bearing capacity of TBM main bearings can be met.

Description

technical field [0001] The invention relates to a bearing, in particular to a TBM hybrid main bearing structure. Background technique [0002] The main bearing is the core component of a full-face tunnel boring machine (TBM), supporting the cutterhead and providing torque and thrust for the cutterhead's excavation operations. The conventional TBM main bearing adopts a three-row roller bearing (main thruster, auxiliary thruster and radial) structure. The outer ring of the bearing is the stator, which is connected with the head frame, and the inner ring is the rotor and the cutter head. Through the rigid friction of the rollers, Transmits the thrust and torque of the cutter head. [0003] The load capacity and life of conventional TBM main bearings are limited by the quality and size of the rollers. The longer the excavation mileage and the higher the rock strength, the larger the size of the rollers needs to be designed to meet the load and life requirements. For ultra-long...

Claims

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Application Information

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IPC IPC(8): F16C32/06F16C19/56F16C33/66
CPCF16C19/56F16C32/0603F16C32/0629F16C33/6651F16C33/6674
Inventor 谭顺辉杨添任田彦朝贺飞
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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