▎ 摘　　要

NOVELTY - The pump i.e. double-sided graphene-trough pump (1200), has an inlet/outlet formed with a trough-shaped cavity. Upstream valve gates (1204a, 1204b) are located by the inlet/outlet. A valve protrusion is formed by the upstream valve gates. A pump gate is located within the cavity. An electrically conductive membrane covers the cavity and comprises multiple layers of graphene (1002). The pump gate comprises multiple electrically conductive traces (1203a, 1203b). Distance between the valve protrusion and the membrane is less than distance between the valve gate and the membrane. USE - Membrane pump i.e. double-sided graphene-trough pump such as drug delivery and miniature heart pump, tiny ink pump and silent fan, for use in a graphene-drum pump system in medical applications and consumer electronics applications. ADVANTAGE - The pump is small in size, and has high power density and high operating efficiency, and realizes quiet operation and precise fluid flow. The valve includes a non-conductive element located between the electrically conductive membrane and the gate, and a sensor and a stabilizer system operable for preventing the electrically conductive membrane from coming in contact with the gate. The pump can form a gap between the upstream valve graphene drum and a channel opening to conduit when the upstream valve is closed so as to prevent fluid molecules from passing through the upstream valve when the gap is small and avoid wear when the gap is large. The pump includes a higher pumping rate per unit area due to double flow and reduces pressure changes within the cavity so as to reduce back flow and increase pumping speed for using restoration force and electrostatic force to rapidly move the graphene, thus protecting the graphene from external environment. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a double-sided graphene-trough pump. Graphene (1002) Double-sided graphene-trough pump (1200) Metal gates (1201, 1202) Electrically conductive traces (1203a, 1203b) Valve gate (1204a, 1204b)