A turbocharger with radial flow turbine nozzle ring adjustable guide vane structure

Abstract

The invention discloses a turbocharger having a runoff turbine nozzle ring adjustable guide vane structure. The turbocharger includes a turbine, a compressor impeller, an intermediate body and an adjustable guide vane structure; the compressor impeller is connected to the turbine through the intermediate body; the adjustable guide vane structure includes a supporting disc one, adjustable nozzle blades and a supporting disc two; the supporting disc one is a step-like circular ring, and is provided with second grooves and through holes which are in equidistance and annular distribution; the supporting disc two is provided with first grooves and circular grooves which are in uniform annular distribution; the circular grooves are corresponding to the through holes, and the number of the circular grooves is the same as that of the through holes; the adjustable nozzle blades are in uniform annular arrangement and installed between the supporting disc one and the supporting disc two; and a nozzle can be formed between the adjacent nozzle blades, and a series of nozzles forms a nozzle ring. The flow area of the nozzle ring can be adjusted by rotating a rotating shaft to drive the rotationof the nozzle blades, air-flow leakage caused by gaps between the two end faces of the nozzle blades can be reduced, and the working efficiency of turbines can be enhanced.

Description

Technical field [0001] The present invention relates to the field of auto parts, and relates to a turbocharger, and more particularly to a turbocharger with a radial turbine nozzle ring adjustable guide vane structure. Background technique [0002] Turbocharging introduces the exhaust gas with certain energy discharged from the engine into the turbine and expands to do work. The entire power of the exhaust turbine is used to drive the working impeller of the compressor that rotates coaxially with the turbine. The fresh air is compressed in the compressor and then sent to the cylinder. Exhaust gas turbocharging improves the output ratio of effective power due to the use of exhaust gas energy, in order to ensure that the engine has a higher boost pressure and higher torque at low speeds, and at the same time to ensure that the engine boost pressure at high speeds will not be excessive. High to prevent excessive engine thermal load and turbocharger overspeed. The turbocharger adopts...

AI Technical Summary

Problems solved by technology

Due to the pressure difference between the pressure surface of the nozzle vane and the suction surface, and the gap between the two end surfaces and their respective opposite walls, the gas leaks from the side with higher pressure to the side with lower pressure, which will cause a significant reduction in the efficiency of the turbine.

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