Zero-leakage ORC turbine regulating valve

The utility model relates to the technical field of valves, in particular to a zero-leakage ORC turbine regulating valve which comprises a regulating valve body, a regulating valve seat, an oil cylinder, a piston, a valve rod, a valve head assembly, a sealing assembly and a negative pressure assembly. Gas flows out of the valve body through the adjusting valve body and the adjusting valve seat, a small part of the gas flows into an annular cavity of the negative pressure assembly to generate a negative pressure area, the negative pressure assembly is sucked, and therefore leaked gas of the valve rod is sucked away, the sealing performance of the valve rod can be improved through the sealing assembly, the adjusting valve adopts a direct-acting adjusting mode, a power source adopts a hydraulic mode, the electro-hydraulic conversion response speed is high, and the service life of the valve rod is prolonged. The control system is simple in structure and high in precision, the rotating speed adjusting fluctuation