Hob Composite Abrasion Tester

Abstract

The invention discloses a hob composite abrasion tester, which comprises a loading frame, a horizontal measurement and control loading measurement and control subsystem, a vertical loading measurement and control subsystem, a mechanism for rock sample and model hob abrasion, and a model hob measurement Mechanism and subsystem integration and realization of automatic control system. The hob compound abrasion tester disclosed by the invention has a simple structure and can perform three experiments including a hob rock breaking abrasion test, a hob cuttings abrasion test and a hob cuttings and rock breaking compound abrasion test. Through the composite abrasion experiment of rock cuttings and rock breaking of hobs, it is possible to explore the impact of different tool thrusts and rolling speeds (reflected to the shield cutterhead as thrust and torque parameters) on tool wear, guide shield tunneling construction, and predict tool replacement positions and quantity, and finally achieve the purpose of reducing the construction cost of shield tunneling and predicting the construction period.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to an experimental device for predicting hob mode during shield tunneling construction. Background technique [0002] During shield construction, hob wear is mainly divided into two types: normal wear and abnormal wear. Normal wear means that the wear degree of the hob cutter ring is basically the same. When the wear height of the cutter ring exceeds the specified value, the hob is considered to be invalid. Replacement, this failure mode is the main form of hob wear, accounting for 80% to 90% of the total; abnormal wear includes: knife ring eccentric wear, knife ring fracture, chipping, knife ring looseness, seal failure, bearing wear, etc. . [0003] The normal wear of the hob can be divided into direct wear and secondary wear. The direct wear refers to the wear caused when the hob breaks the rock mass. It belongs to high-stress wear and is mainly determined by the streng...

AI Technical Summary

Problems solved by technology

[0004] Although there are many studies on tool wear in shield tunneling, such as the relatively mature and representative CAI value experiment, which mainly measures the rock abrasiveness index, it cannot directly predict the hob wear in different formations, but also The research on the primary wear and secondary wear of tools cannot be carried out effectively

Images