Micro-free piston power unit with self-pressurized type uniflow scavenging structure

Abstract

The invention discloses a micro-free piston power unit with a self-pressurized type uniflow scavenging structure. The micro-free piston power unit comprises a gas cylinder, a stator winding and a rectifier, the stator winding is wound around the outer surface of the gas cylinder, and the rectifier is connected with the stator winding; the gas cylinder is internally provided with two cavities and an exhaust chamber, the exhaust chamber is formed between the two cavities, partition plates are arranged between the two ends of the exhaust chamber and the two cavities, and the exhaust chamber is provided with an exhaust opening; the two cavities are symmetrically distributed through the center axis of the exhaust opening, a gas inlet is formed in the upper end of each cavity, and a self-pressurized gas inlet channel is formed in the inner bottom of each cavity; and two magnetic pistons are located in the two cavities correspondingly, thus the cavities are internally divided into scavengingchambers and combustion chambers, a piston connecting rod penetrates through the partition plates to connect the two magnetic pistons, and the piston connecting rod is provided with an axial groove structure. According to the self-pressurized type uniflow scavenging structure, the structure design is simple, the gas inlet pressure is increased through the self operation process, meanwhile, the position of a waste gas outlet is changed to form the uniflow scavenging mode, and the scavenging effect of the micro power unit is improved advantageously.

Description

technical field [0001] The invention belongs to the micro power system related to the field of internal combustion engine and the field of power generation, in particular to a micro free piston power device equipped with a self-pressurized direct current scavenging structure. Background technique [0002] In the field of energy and power, improving energy utilization has always been one of the important topics. Researchers from various countries are developing new energy conversion devices. Among them, the power device formed by the combination of a free piston internal combustion engine and a linear generator, compared with traditional engines, Because it does not require a crank-link mechanism, it has the advantages of simple structure, high energy density, and wide fuel applicability. It has become one of the typical new energy conversion devices. When the device is running, the free piston compresses the homogeneous gas. After the combustion gas is compressed and ignited,...

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Problems solved by technology

However, the research on the micro-free piston power device is still in the early stage of discussion, and its device also has some shortcomings: the structure distribution is relatively compact, and the scavenging time of the two-stroke is shorter than that of the four-stroke, and the scavenging system has not been effectively improved, which is prone to short scavenging Road overflow, poor ventilation quality, and more residual exhaust gas, resulting in reduced output power

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