Air seal device based on supercharger speed and applicable to turbocharger performance test bench and method of using same

Abstract

The invention relates to an air seal device based on the supercharger speed and applicable to a turbocharger performance test bench and a method of using the same, and relates to the technical field of turbochargers. The air seal device includes an air compressor, an air compressor bleed valve, a combustion system and a bellows connected to an air inlet end of a turbine of a turbocharger. The air compressor, the air compressor bleed valve, the combustion system and the bellows are connected in series. A first electric butterfly valve, a first check valve, an air tank and a second electric butterfly valve are connected in sequence on a branch between the air compressor and the air compressor bleed valve. An output end of the second electric butterfly valve is connected with an annular air chamber in the air compressor of the turbocharger through a vacuum tube. An air outlet tube of the air compressor is connected with an air compressor self-circulation loop, on which an intercooler and a second check valve are connected in sequence. An output end of the second check valve is connected onto an air inlet tube of the air compressor. An air filter is arranged at an input end of the air inlet tube of the air compressor. The air compressor bleed valve is arranged at an output end of the air outlet tube of the air compressor. The gas seal device has a compact structure and achieves the purpose of sealing so that the lubrication effect of a lubrication system is greatly enhanced, and is also easy to use.

Description

technical field [0001] The invention relates to an air seal device based on the speed of a turbocharger applied to a performance test bench of a turbocharger and a use method thereof, and relates to the technical field of turbochargers. Background technique [0002] Since the wind source system of the turbocharged test bench adopts a high-power air compressor, often due to the needs of the bench test, the adjusted flow rate of the air compressor will fluctuate greatly, and the bench test is complicated to start and stop. This puts higher demands on the lubrication system and sealing system of the turbocharger. However, the oil pressure output by the lubrication system of the test bench is often set to a constant value, and the two ends of the turbocharger are separated from the lubrication system by the piston ring, and the air pressure of the piston ring close to the compressor will fluctuate greatly, which is easy to cause Large leakage of lubricating oil. At the same ti...

AI Technical Summary

Problems solved by technology

[0002] Since the air source system of the turbocharged test bench adopts a high-power air compressor, often due to the needs of the bench test, the adjusted flow rate of the air compressor will fluctuate greatly, and the bench test is complicated to start and stop. This puts higher requirements on the lubrication system and sealing system of the turbocharger

However, the oil pressure output by the lubrication system of the test bench is often set to a constant value, and the two ends of the turbocharger are separated from the lubrication system by the piston ring, and the air pressure of the piston ring close to the compressor will fluctuate greatly, which is easy to cause Large leakage of lubricating oil

At the same time, complex start-stop conditions will also cause fatigue failure to the seal ring in the supercharger

If the sealing ring fails, when the external air pressure is lower than the oil pressure of the lubricating oil, the lubricating oil will leak outward, resulting in waste of oil; when the external pressure is greater than the oil pressure of the lubricating oil, air will enter the engine lubrication system through the sealing ring

When the oil pressure and flow are insufficient, the following problems will occur: insufficient lubricating oil for the supply journal and thrust bearing, insufficient lubricating oil for keeping the rotor journal and bearing journal floating; The oil has not been supplied to the bearings, which will cause the destruction of the entire supercharger

Images