A combined sealing method and device for a continuous low temperature combustion rotary engine

Abstract

The invention discloses a combined sealing method and device for a continuous low-temperature combustion rotary engine. The combined sealing method and device are characterized in that the device comprises a continuous low-temperature combustion rotary engine shell (1), a main shaft timing gear (2), an auxiliary shaft timing gear (3), a right auxiliary shaft oil seal (5), an end face sealing hex socket (6), an auxiliary wheel (8), an auxiliary shaft (9), an end face seal (10), a main shaft (12), a bearing seal (16), an end face outer leakage sealing ring (17), an end face inner leakage sealing ring (18), a main shaft auxiliary gear matching part (19), a main shaft gear (20), an end face inner seal (21), a left auxiliary shaft oil seal (22), an upper air inlet (23), a main shaft gear protrusion groove (24), a main shaft gear protrusion (25), an upper exhaust port (26), a lower air inlet (27), a lower exhaust port (28), an end face sealing installation hole (29), an end face sealing positioning pin (30), an end face inner leakage sealing groove (31), an end face outer leakage sealing groove (32) and an auxiliary wheel groove (33). By means of the scheme, the sealing problem in the air intake, combustion and expansion processes of the novel continuous combustion low-temperature rotary engine is solved, due to axial sealing and radial sealing and meanwhile by the adoption of a non-contact combined sealing technology, movable sealing of the whole system can be achieved, and the sealing requirement is met.

Description

technical field [0001] The patent of the present invention relates to a sealing method and device for a rotary engine, in particular to a combined sealing method and device for a continuous low-temperature combustion rotary engine. Background technique [0002] As the country's regulations on internal combustion engine emissions and fuel consumption become more and more stringent, existing power machinery such as traditional internal combustion engines and gas turbines have the following problems: (1) Efficiency issues. Under certain working conditions, the efficiency of traditional diesel engines is the highest. The thermal efficiency is only about 40%; the highest efficiency of the traditional gasoline engine is 35%, and the efficiency is lower in the idling condition, and the efficiency of the traditional engine is low in the transient condition such as rapid acceleration and deceleration; (2) the emission problem, due to the traditional diesel engine During operation, th...

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Problems solved by technology

[0002] As the country's regulations on internal combustion engine emissions and fuel consumption become more and more stringent, existing power machinery such as traditional internal combustion engines and gas turbines have the following problems: (1) Efficiency issues. Under certain working conditions, the efficiency of traditional diesel engines is the highest. The thermal efficiency is only about 40%; the highest efficiency of the traditional gasoline engine is 35%, and the efficiency is lower in the idling condition, and the efficiency of the traditional engine is low in the transient condition such as rapid acceleration and deceleration; (2) the emission problem, due to the traditional diesel engine During operation, the air is excessive, so in the case of oxygen-enriched high temperature, NOx emissions, at the same time due to diffusion combustion, fuel spray and air are mixed unevenly, local combustion deteriorates, fuel is directly cracked into low-carbon atoms, and combined fusion into particles Therefore, the emission of particles is high, especially when accelerating, the exhaust of the diesel engine emits black smoke; the traditional gasoline engine burns in the equivalence ratio, and when the load is high, it will increase the injection, so the emission of hydrocarbons and carbon monoxide is high, and because the cylinder The wall surface temperature of the internal combustion piston is low, easy to catch fire, and the quenching distance is long, resulting in high emissions; (3) Power density, traditional diesel engine and gasoline engine have low power density

[0003] However, there are axial and radial sealing problems in the continuous low-temperature combustion rotary engine: (1) The axial sealing problem is caused by the special circumstances of the combustion chamber structure of the rotary engine, mainly including the base circle of the driving wheel and the two auxiliary wheels Tangentially, through the cooperation of protrusions and grooves, independent volume cavities are formed; the two ends of the independent volume cavities, due to the limitation of precision work progress, cannot be matched very closely, and because the rotor of the continuous low-temperature combustion rotary engine is in real time High-speed operation, if the fit is tight, it will cause serious wear and tear, so it can only be a clearance fit, but through high machining accuracy, an extremely low clearance can be achieved, but there will still be end face gas leakage; (2) Radial sealing problems, The upper end surface of the independent volume chamber is closely matched with the casing of the continuous low-temperature combustion rotary engine by means of protrusions. Due to the limitation of the precision work progress, it is impossible to fit very closely. At the same time, because the rotor of the continuous low-temperature combustion rotary engine is running at high speed in real time, If the fit is tight, it will cause serious wear, so it can only be a clearance fit, but through high machining accuracy, an extremely low clearance can be achieved, but there will still be gas leakage on the top surface; gas leakage will cause air intake during the intake process Low density, low combustion chamber pressure, and low expansion pressure, so that the design goals of low emission, high efficiency, and high power cannot be achieved

[0004] In order to solve the above problems, it is necessary to redesign the seal of the continuous low-temperature combustion rotary engine, and the prior art lacks a method and device capable of sealing the axial and radial directions of the continuous low-temperature combustion rotary engine

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