Method for determining the thickness of the connecting plate of the cutterhead of the full-face rock boring machine

Abstract

The invention discloses a determining method of the thickness of a cutter head connecting plate of a full-section rock tunneling machine, which belongs to the field of tunneling machine parts. The determining method comprises the following steps: firstly establishing a coordinate system in the middle surface of a cutter head; then deriving and obtaining the deflection z of the cutter head according to elastic mechanics theory; determining the thickness of the cutter head connecting plate of the full-section rock tunneling machine according to the deflection z of the cutter head. By adopting the cutter head connecting plate designed by the method disclosed by the invention, the problems of non-uniform deformation of the cutter head and large vibration during a construction process of the full-section rock tunneling machine can be solved, the vibration amplitude of the cutter head is reduced by about one third, and the number of disc cutter tipping and cutter ring breaking is reduced from 11.3 percent of the cutter consumption number to 5.1 percent; the utilization rate of the full-section rock tunneling machine is increased by about 2.4 percent; the result shows that the purposes ofshortening the duration of a project and reducing the cost of construction projects can be realized by reducing the number of abnormal damage such as disc cutter tipping and cutter ring breaking on the cutter head and increasing the utilization rate of equipment.

Description

technical field [0001] The invention belongs to the field of excavating machine components, and in particular relates to a method for determining the thickness of a cutter head connecting plate of a full-section rock excavating machine. Background technique [0002] The full-face rock boring machine cutter head system is one of the key core components that transmits thrust and torque to the disc-shaped hob installed on it to realize rock-breaking excavation operations, and also undertakes the function of facilitating the replacement of failed disc-shaped hobs . The cutter head of the early full-face rock boring machine was connected with its large bearing through the cutter head adapter seat. In order to realize the replacement of the failed disc hob, a manhole was usually set on the cutter head, and technicians entered the front of the cutter head through the manhole to replace the failed one. Disc hob. Practice has found that changing the disc hob is time-consuming and l...

AI Technical Summary

Problems solved by technology

However, in actual use, it was found that due to the large deformation of the cutterhead connecting plate, during the construction of the full-face rock tunneling machine, the cutterhead vibrated greatly, the disc-shaped hob chipped, and the cutter ring fractured seriously. According to incomplete statistics of a certain project, the cutterhead Vibration caused disc hob chipping, the number of cutter ring breakage accounted for 11.3% of the cutter consumption, and the utilization rate of full-face rock tunneling machines was reduced by nearly 6%.

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