VALVE MANIFOLDS are successfully used in TBM

GRH designs and manufactures Hydraulic Valves for Tunnel boring machine, including propelling valve manifolds, Proportional Valve, pressure adjustment valve manifolds, directional valve manifolds, etc.

To meet the requirement of the earth surface level variation during tunnel boring, electro-hydraulic proportional push system with flow-pressure control, theoretical analysis and simulation of this push system are carried out. The use of GRH valves can improve the stationary control accuracy of the electrohydraulic proportional velocity regulating valve significantly.

On tunnel boring (TBM) machines, there are multiple hydraulic systems that control numerous functions. These hydraulic systems must operate with precise control and be reliable during operation deep underground.

Reliable solutions for Tunnel Boring Machines Cutterhead drive, propelling, steering and support functions. There are many operations and functions that need to work smoothly and reliably on a tunnel boring machine for efficient and safe operations. All of these actions have to use the right valve manifolds.

An electro-hydraulic control system for the thrust speed control in TBM was introduced by GRH and its dynamics model was established. An internal intelligent controller was then designed based on the regulation principles for improving effects in thrust speed control. GRH valves for TBM provides a possible new way for thrust hydraulic system of TBM, and also extend the applications for internal intelligent control. Meanwhile GRH also provide you with lubrication pump , Gear Pumps, as well as Flow Dividers for TBM.