A joint bearing used for the main drive component of a shield machine and its checking method

Abstract

The invention relates to the technical field of bearings, in particular to a joint bearing for a main drive assembly of a shield machine and a checking method thereof. The joint bearing comprises: an inner ring having an outer spherical surface; a first outer ring arranged outside the inner ring, The first outer ring has a first inner spherical surface matched with the outer spherical surface; the second outer ring is fixedly connected with the first outer ring and arranged outside the inner ring, and the second outer ring has a second inner spherical surface matched with the outer spherical surface The center of the outer sphere, the center of the first inner sphere, and the center of the second inner sphere are not concentric, and there are contact points between the outer sphere and the first inner sphere and the second inner sphere. The beneficial effect is that: since the center of the outer sphere, the center of the first inner sphere, and the center of the second inner sphere are not concentric, there are contact points between the outer sphere and the first inner sphere and the second inner sphere, Compared with the prior art, the inner ring changes from one point of force to two points of force, and the force is dispersed, so it can bear a larger radial load and has a better bearing capacity.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a joint bearing for a main drive assembly of a shield machine and a checking method thereof. Background technique [0002] With the acceleration of the construction of subways, tunnels, and urban comprehensive pipe corridors, the domestic demand for shield machines is also increasing. In order to facilitate the replacement of the hob and the adjustment of the direction of excavation, many domestic manufacturers are developing new large joint bearings for main drive components. [0003] For example, the emergency repair device for shield machine spherical hinge seal with swing function disclosed by the Chinese utility model patent whose authorized announcement number is CN208486881U includes a spherical hinge seal, an inner spherical hinge (i.e. an inner ring), an outer spherical hinge (including the first Outer ring and second outer ring), front shield center ring (shield body)...

AI Technical Summary

Problems solved by technology

[0004] Due to the large size of the joint bearing, the special structure, and the complex stress situation, the large joint bearing bears a large radial force when the shield machine is working. However, for the joint bearing of the above emergency repair device, the inner ring It is concentric with the first outer ring and the second outer ring, and there is only one contact point between the inner ring and the first outer ring and the second outer ring. This type of spherical plain bearing can withstand relatively small radial loads, and the scope of application Relatively limited

In addition, since the spherical plain bearings used in the main drive components of the shield machine are different from conventional spherical plain bearings, the calibration cannot be carried out according to the existing national standard calculation methods. At present, there is no calibration method directly applicable to this type of bearings in China.

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