Bingham fluid valve-element-free overflow device and method

Abstract

The invention discloses a Bingham fluid valve-element-free overflow device and method. The device comprises a cushion cylinder, cylindrical pins, steel pipes, a liquid collecting cylinder, a base and bolts. The cushion cylinder is composed of a cylindrical cushion cylinder cover and a cylindrical cushion cylinder body in a welded mode. Six sets of liquid outlets are formed in one side of the cushion cylinder body, and one ends of the steel pipes are connected with internal threads of the liquid outlets through external threads. Pin holes are formed in the circumferential surface of the cylinder of the cushion cylinder body, and the cylindrical pins are installed in the pin holes in a matched mode. Hexagon nuts are arranged at the outer ends of the cylindrical pins. Through holes are formed in the inner ends of the cylindrical pins. The liquid collecting cylinder is composed of a cylindrical liquid collecting cylinder body and a cylindrical liquid collecting cylinder cover in a welded mode. The side face of the liquid collecting cylinder body is provided with round unthreaded holes which are right opposite to the liquid outlets. The other ends of the steel pipes are directly overlapped into the round unthreaded holes. When the through holes in the cylindrical pins are collinear to the liquid outlets, liquid in the cushion cylinder can enter the steel pipes, and the on-way resistance of Bingham fluid in the steel pipes serves as the overflow pressure of the device.

Description

technical field [0001] The invention relates to the technical field of Bingham fluid, relates to a Bingham fluid overflow device, in particular to a Bingham fluid spoolless overflow device and method suitable for overload protection of complex Bingham fluid hydraulic systems. Background technique [0002] The circular pipe flow of the fluid is in the form of shear flow. During the flow process, the shear stress changes with the change of the shear rate. For Bingham fluid, the constitutive equation between shear stress and shear rate conforms to the Bingham model: [0003] [0004] where: τ y is the yield stress of the Bingham fluid. When the shear force suffered by the fluid is less than its yield stress, the fluid exhibits solid non-flow properties; and when the stress it bears is greater than its structural strength, the Bingham fluid begins to flow, showing fluid characteristics . There are many fluids that meet this regularity in nature, such as concrete slurry, to...

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Problems solved by technology

[0007] 2) Hydraulic components, especially valve components, are mostly slender holes or gaps inside, and there may be a certain back pressure at the position of the valve core, resulting in excessive resistance along the way when Bingham fluid passes through the hydraulic components, resulting in large A certain degree of energy loss, even causing hydraulic components to block and fail

[0008] Therefore, for Bingham fluid, the existing hydraulic components suitable for Newtonian fluid are not suitable for the use of Bingham fluid, especially the influence of complex flow channels inside hydraulic components on the flow of Bingham fluid, and the development of simple structure and reliable performance Hydraulic components are particularly urgent, but the devices and methods in this area are relatively lacking

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