Monitoring device for rotating speed of hobbing cutter

Abstract

The invention relates to a monitoring device for the rotating speed of a hobbing cutter, wherein the monitoring device for the rotating speed of the hobbing cutter comprises an excitation module, a detection module and a processing module, wherein the excitation module is arranged on a cutter hub of the hobbing cutter; the detection module is embedded in a cutter holder of the hobbing cutter and is arranged in a way of being opposite to the cutter hub provided with the excitation module; the processing module is in communication connection with the detection module; the excitation module sendsexcitation signals to the detection module when rotating along with the hobbing cutter; the detection module receives the excitation signals, generates pulse signals according to the excitation signals, then determines the rotating speed of the hobbing cutter according to the pulse signals and sends the rotating speed of the hobbing cutter to the processing module; and the processing module analyzes and processes the rotating speed of the hobbing cutter. According to the embodiment, the detection module can be arranged in the cuter holder of the hobbing cutter in an embedded way, so that thedamage in the tunnel excavation process is avoided; and the monitoring reliability on the rotating speed of the hobbing cutter is improved.

Description

technical field [0001] The invention belongs to the technical field of detection equipment, and in particular relates to a detection device for the rotational speed of a hob. Background technique [0002] Shield machines and tunnel boring machines are two types of machines that excavate tunnels based on the full-face excavation method. The common excavation tools are hobs installed in the tool box on the cutter head. [0003] During tunnel excavation, hobs are used to excavate the rock and soil directly in front of the tunnel face. When the hob is in normal working condition, the hob can rotate with the rotation of the cutter head, and cut into the rock mass and soil during the rotation process to realize tunnel excavation. If the hob does not rotate with the rotation of the cutterhead, the hob will be eccentrically worn. At this time, the hob needs to be replaced in time, otherwise it may cause increased wear or damage to the cutterhead or adjacent hobs. Therefore, , It i...

AI Technical Summary

Problems solved by technology

However, the eddy current sensors currently used have a small measuring range, generally only about 20mm. When installed, they must be close to the hob and protrude from the knife box to monitor the speed of the hob. It is easy to be damaged during tunnel excavation.

Moreover, the eddy current sensor currently used has a large power consumption, which easily leads to a short service time, and the reliability of monitoring the hob rotation speed is low

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