3results about How to "Reduce leakage flow" patented technology

This invention belongs to the field of radial turbines, specifically relating to a leakage prevention structure and a radial turbine. One leakage prevention structure includes a first inlet pipe, a first outlet pipe, and a second outlet pipe; the outlet of the first inlet pipe is connected to the inlet of the first outlet pipe and the inlet of the second outlet pipe, respectively; the leakage prevention structure is installed at the tip of the moving blade, allowing pressure-side fluid to enter the first inlet pipe, fluid ejected from the first outlet pipe to act within the gap, and fluid ejected from the second outlet pipe to act on the suction side. The leakage prevention structure of this invention can introduce pressure-side fluid into the gap and suction side, thereby reducing blade load; on the other hand, the fluid flowing into the gap significantly increases the leakage flow resistance, reducing the leakage flow rate; the fluid flowing into the suction side impacts the leakage vortex, weakening the leakage vortex intensity and further reducing the leakage flow rate; thus, it has the effect of weakening the leakage vortex intensity, reducing losses, and improving turbine efficiency.

A rotating machine is provided with: a rotating unit; a stationary part surrounding the rotating part; and a sealing device for reducing a leakage flow of a fluid passing through a gap between the rotating part and the stationary part, the sealing device comprising: a sealing member provided in the gap between the rotating part and the stationary part; and a first urging member that urges the seal member toward the outside in the radial direction of the rotating machine, the inner peripheral surface of the stationary portion being formed with: a first groove that extends in the circumferential direction of the rotating machine; and a second groove which is located upstream of the first groove in the axial direction of the rotating machine and extends in the circumferential direction, in which a first support part capable of supporting the seal member is formed on the side surface of the first groove, and a second support part capable of supporting the seal member is formed on the side surface of the second groove.

This invention provides a turbine blade and a gas turbine. The turbine blade includes a blade body. The blade body includes a suction surface, a pressure surface, a suction side rib, and a pressure side rib; the suction side rib is disposed on the suction surface at the tip of the turbine blade, and the pressure side rib is disposed on the pressure surface at the tip of the turbine blade, forming a tip groove; the turbine blade also includes an outer blade tip surface disposed at the tip of the turbine blade; the bottom edge of the suction side rib and the tip edge of the suction surface are connected through the outer blade tip surface, and the bottom edge of the pressure side rib and the tip edge of the pressure surface are connected through the outer blade tip surface; the suction side rib is inclined from the outer blade tip surface to the suction surface, forming a first angle with the outer blade tip surface, and a suction side groove is formed between the outer surface of the suction side rib and the tip surface; the pressure side rib is inclined from the outer blade tip surface to the pressure surface, forming a second angle with the outer blade tip surface, and a pressure side groove is formed between the outer surface of the pressure side rib and the tip surface. The above-described turbine blade can reduce tip leakage flow.