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Oil cylinder constant-pressure pre-tightening device and method for main bearing of heading machine

A technology of constant pressure preload and main bearing, applied in the field of roadheader bearings, can solve the problem of unstable working state of the rotating mechanism, and achieve the effects of easy installation and disassembly, simplified structure and high loading accuracy

Pending Publication Date: 2022-05-13
CHINA RAILWAY CONSTR HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the rigidity of the spring is much smaller than that of the bearing, the position of the preload device will change with the change of its rotational speed and external load during the use of the bearing, and the magnitude of the preload will also change, which will cause the rotation mechanism to Unstable working condition

Method used

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  • Oil cylinder constant-pressure pre-tightening device and method for main bearing of heading machine
  • Oil cylinder constant-pressure pre-tightening device and method for main bearing of heading machine
  • Oil cylinder constant-pressure pre-tightening device and method for main bearing of heading machine

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Embodiment

[0026] see Figure 1 ~ Figure 3 , an oil cylinder constant pressure preloading device used on the main bearing of a roadheader, including a floating ring 7 and an oil cylinder 8 .

[0027] The main bearing of the roadheader is in the form of a classic three-row roller bearing, including an inner ring 3 and an outer ring. The outer ring is divided into a first outer ring 1 and a second outer ring 2 in the axial direction, and the second outer ring 2 Compared with the first outer ring 1, which is arranged closer to the working surface (such as the cutter head), the auxiliary thrust roller 5 is arranged between the second outer ring 2 and the inner ring 3, and between the first outer ring 1 and the inner ring 3 The main push roller 4 is set, and the rolling axes of the auxiliary push roller 5 and the main push roller 4 are perpendicular to the central axis of the entire bearing, and a radial roller 6 is also arranged between the outer ring and the inner ring 3, and the radial rol...

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Abstract

The invention discloses an oil cylinder constant-pressure pre-tightening device and method for a main bearing of a heading machine. The device comprises a floating ring, an oil cylinder, a controller, a proportional electromagnetic valve and an oil cylinder monitoring system. The floating ring is arranged between the second outer ring and the inner ring of the main bearing and located between the auxiliary pushing roller and the raceway face of the second outer ring, a groove used for installing the oil cylinder is formed in the raceway face of the second outer ring, the oil cylinder is used for providing axial pre-tightening force for the floating ring, the oil cylinder comprises a rod cavity and a rodless cavity which are communicated with an oil way, and the rod cavity and the rodless cavity are communicated with the oil way. The proportional electromagnetic valve is arranged on an oil way, the oil cylinder monitoring system comprises a signal processing module and pressure sensors arranged in a rod cavity and a rodless cavity, data signals fed back by the pressure sensors are transmitted to the controller after being processed by the signal processing module, and the opening amount of the proportional electromagnetic valve is regulated and controlled by the controller. An active pre-tightening mode is adopted, adjustment can be carried out based on real-time data, and it is ensured that the output pre-tightening force is appropriate and stable.

Description

technical field [0001] The invention relates to the technical field of roadheader bearings, in particular to an oil cylinder constant-pressure preloading device and method for main bearings of roadheaders. Background technique [0002] The main bearing of a full-face roadheader refers to a low-speed, heavy-duty bearing used on its cutter head drive system, usually in the form of a three-row roller bearing. The service life and reliability of the main bearing of the roadheader directly affect the construction safety of the roadheader, and it is also an important factor restricting the service life of the roadheader. During the excavation process, due to the movable gap between the rolling elements and the inner and outer rings, the main bearing is in a state of vibration for a long time due to the formation reaction force and overturning moment, which may easily lead to fatigue damage or wear failure of the rollers and raceway surfaces. The damaged main bearing needs to be e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P19/00B23P19/027B23P21/00
CPCB23P21/00B23P19/027B23P19/00
Inventor 彭正阳刘华林喜魏玎门天龙潘成福
Owner CHINA RAILWAY CONSTR HEAVY IND
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