Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

34results about How to "Simple protocol" patented technology

Selection method for earth pressure balance shield muck improvement parameters of viscous formation adopting foam as additive

ActiveCN104453923AIncrease slumpOptimal water contentTunnelsInformaticsFoaming agentEngineering
The invention relates to a selection method for earth pressure balance shield muck improvement parameters of viscous formation adopting foam as an additive and belongs to the technical field of earth pressure balance shield construction. According to the method, the function relation of liquid-plastic limit and the foam injection ratio, the function relation of the slumps and the foam injection ratio and the function relation of the slumps and the water content are obtained through fitting of curve mathematical relationships. In order to facilitate establishment of effective earth pressure balance in the shield tunneling process, based on the requirement that the viscosity index is 0.4-0.75, the relation of the water content and the foam injection ratio is established, and a relation curve is drawn. On coordinate axes of the relation curve, the optimum foam injection ratio range is determined through the optimum slump range, and then the optimum water content range of muck is determined according to the relation of the water content and the foam injection ratio. In the process of field application, the influences of soil warehouse pressure on the volume of the foam, the bulk factor of the muck and the moisture of undisturbed soil are taken into account, and finally the use amount of foaming agents and the water injection ratio needed for muck improvement of each ring duct piece footage of the earth pressure balance shield are obtained. Experiments needed by the method are simple in operation, low in experiment cost and can be effectively applied to field construction.
Owner:CENT SOUTH UNIV

Six-component high-precision micro rolling torque measuring device and measuring method

The invention discloses a six-component high-precision micro rolling moment measuring device, which relates to the technical field of aerospace wind tunnel force measurement tests, can simultaneouslymeasure six aerodynamic components with extremely different loads acting on a test model, and adopts the specific scheme that the six-component high-precision micro rolling moment measuring device comprises a main balance element, a bearing, a model connecting sleeve, a balance supporting rod, an air inlet pipe and an air outlet pipe, wherein the main balance element comprises a supporting rod endand a main balance element model end which are located at two ends respectively, the supporting rod end is connected with the balance supporting rod, the main balance element model end is connected with a stator of the bearing, and a rotor of the bearing is connected with the model connecting sleeve; a rolling resistance element is annularly arranged at the periphery of the main balance element,the rolling resistance element comprises a fixed end and a rolling resistance element model end, and the fixed end is connected with the main balance element model end. The six-component high-precision micro rolling moment measuring device provided by the invention can avoid repeated tests in the same test state, improves test data precision, reduces the test train number, and reduces the test cost.
Owner:INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products