Water jet and corrosive liquid lower cutter ring wear test device and test method

Abstract

The invention discloses a water jet and corrosive liquid lower cutter ring wear test device and a test method. In the testing device, a telescopic oil cylinder is connected to a three-dimensional rack, a cross beam, a connecting plate, a three-way force sensor and a tool rest are sequentially connected below the telescopic oil cylinder, a bearing, a cutter shaft and a reduced-size cutter ring areconnected in the tool rest, a vertical nozzle guide rail is connected below the tool rest, a transverse nozzle guide rail, a nozzle support and a nozzle are sequentially connected on the vertical nozzle guide rail, the cross beam is symmetrically provided with two sets of tool rests, the reduced-size cutter rings, the nozzles and other parts about the telescopic oil cylinder, an extremely hard rock sample is placed in a stock bin box, the bottom of the stock bin box is connected with a hydraulic motor through a bolt, and an infrared thermometer is fixedly connected to the outer ring of a supporting base. The test method can be matched with the test device to complete the whole cutting wear test process of the cutter ring under the conditions of water jet and corrosive liquid, and can provide basis for predicting the wear life of the cutter ring of a hob and designing the wear resistance of the cutter ring of the hob under the conditions of water jet and corrosive liquid.

Description

technical field [0001] The invention relates to the technical field of rock tunnel boring machine hob cutting wear test, in particular to a test device and a test method for the rotary cutting wear test of a hob cutter ring under water jet assistance and corrosive liquid conditions. Background technique [0002] Rock tunnel boring machine (abbreviated as TBM) is widely used in tunnel excavation due to its advantages of high construction efficiency and strong operation safety. TBM mainly relies on the hob on the cutterhead to cut and break rocks, and the rock-breaking performance of the hob directly determines the reliability and stability of the TBM's excavation. The hob mainly includes key components such as the cutter ring, cutter hub, and cutter shaft. The hob contacts the rock through the cutter ring. Due to the strong abrasiveness of the rock, it will cause severe wear to the hob cutter ring during the cutting process, and serious It restricts the service life of the h...

AI Technical Summary

Problems solved by technology

The invention patent applied by Central South University (Application No.: 201310032227.X) is named: A test device for rock-breaking characteristics of hard rock hobs. The test device involved can carry out hob wear tests, but the device uses active rotating hob knives The sliding friction and wear of the hob is realized by the method of the hob ring, which is different from the passive rotation friction and wear of the real hob cutter ring, and the test device cannot carry out the cutting wear test of the hob cutter ring under the conditions of water jet assistance and corrosive liquid; The invention patent (Application No.: 201710905705.1) applied by China Railway Tunnel Bureau Group Co., Ltd. is named: hob wear test platform and supporting measurement and evaluation method. The wear test device involved also uses the method of actively rotating the hob to realize the hob Friction and wear, and the simulation is the linear cutting wear of the hob, which has a large distortion with the real rotary cutting wear of the hob. At the same time, the test device cannot carry out the cutting wear test of the hob under the conditions of water jet assistance and corrosive liquid; Changsha The invention patent (application number: 201811158653.7) applied by the college is named: a shield tool material wear test bench, and a hob material wear test device has been developed. The cutting wear test of the cutter ring, and when the hob cutter ring rubs against extremely hard rock, due to the excessive cutting load of the hob cutter ring, it is easy to cause the test device to roll over and become unstable

At the same time, the disassembly and installation process of the hob and its accessories under this device is complicated, and the installation position of the hob cannot be adjusted. The ability to study the friction and wear characteristics of the hob cutter ring is limited.

[0005] In summary, the existing hob wear test device can complete the friction and wear test of the hob ring under normal conditions, but the existing hob wear test device basically cannot complete the hob knife under the water jet assisted and corrosive liquid conditions. Ring cutting wear test

At the same time, considering that when the hob is cutting extremely hard rock, the cutting load of the hob is greater at the same cutting wear depth, which may easily cause the rock silo and even the entire test device to be unstable. Therefore, the stability of the wear test device is required to be higher.

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