8 results about "Hot air engine" patented technology

The present invention relates to a single-cylinder internally heated hot air engine, which comprises: a cylinder body assembly, comprising a hot end cylinder body and a cold end cylinder body, the hot end cylinder body and the cold end cylinder body being butt-combined to form a sealed single cylinder body and being provided with a heat insulation ring therebetween; a first heat exchanger, which is arranged inside the hot end cylinder body and is in fluid communication with an external heat source and is used for heating a working gas in the hot end cylinder body; a second heat exchanger, which is arranged in the cold end cylinder body and is in fluid communication with an external cold source and is used for cooling a working gas in the cold end cylinder body; a piston, which is installed in the cylinder body assembly, the piston being provided with an airflow channel and an air valve, the airflow channel being used for communicating the working gases in the hot end cylinder body and in the cold end cylinder body, and the air valve being used for controlling the on-off of the airflow channel; and a piston rod, one end thereof being fixed to the piston, and the other end thereof being connected to a transmission mechanism outside the cylinder body. The hot air engine of the present invention involves a simple cylinder structure, has high pressure tolerance, and achieves a higher thermal power.

The present invention relates to a hydraulic pump station oil tank applied to the field of hydraulic pumps. During the movement of the hydraulic oil inside the oil tank, impurities settle inside multiple settling chambers. When there are too many impurities inside the settling chambers, the left switch valve is opened and the right switch valve is closed, and liquid nitrogen is released into the refrigeration chamber through a liquid nitrogen bottle and a dual-purpose nozzle. At this time, the hydraulic oil together with the impurities inside the settling chamber is frozen. After the impurities are frozen, their density becomes smaller. Then the left switch valve is closed and the right switch valve is opened, and hot air is briefly discharged into the refrigeration chamber through a hot air engine and a dual-purpose nozzle to melt the frozen impurities near the wall surface of the settling chamber. At this time, the frozen impurities are separated from the settling chamber, and the frozen impurities are fished out to complete the purification of the hydraulic oil. Through the above settings, compared with removing impurities in the form of a filter screen, impurities can be removed without shutting down the machine, reducing the maintenance cost and improving the working efficiency of the equipment.

The invention relates to a preparation method of a special fuel for a coal-based heat engine. The method mainly comprises the following steps: 1) distilling a coal tar fraction under the pressure of 20KPa, and collecting a fraction with a boiling point of 240-340 DEG C under normal pressure to obtain the coal tar fraction; 2) carrying out selective hydrogenation ring opening on the coal tar fraction to obtain refined coal tar; 3) distilling the refined coal tar under the pressure of 20KPa, and collecting fractions with the boiling point of 240-340 DEG C under normal pressure to obtain refined coal tar fractions; 4) directly using the refined coal tar fraction as a special fuel for a thermomotor; or compounding the refined coal tar fraction with a special fuel for a petroleum-based hot-air engine to obtain the special fuel for the hot-air engine. The obtained fuel special for the hot-air engine is free of sulfur and nitrogen, high in cetane number, high in flash point and good in thermal oxidation stability, and is a high-performance fuel special for the hot-air engine.

A maximum delivery adiabatic reciprocal hot-air engine having a free interior space with a wider interior diameter than ends and an isolator-displacer having an aerodynamic exterior shape that mates with an interior shape of the hot and cold caps. The chamber and isolator-displacer are configured to isolate the hot or cold cap while exposing the volume of working fluid to the corresponding cold or hot cap. The chamber having a common space that is alternately heated or cooled by the respective hot or cold cap, The chamber is joined to a piston cylinder at the chamber's maximum interior diameter, with a volume of working fluid within the chamber communicating thermally with a piston through an opening at the common space wall. The volume of working fluid is adiabatically compressed and expanded to its intermediate temperature, thereby maximizing work and efficiency with the least amount of heat and the smallest dimensions.

A hot air engine for converting heat into motion, comprising a wall member, comprising a cylindrical wall surrounding a central axis and an end wall extending through the central axis; a displacer member comprising a cylindrical displacer part co-axial with the cylindrical wall and a displacer end part extending through the central axis, the displacer member is movable, relative to the wall member, back and forth along the central axis to move a working fluid between a first chamber and a second chamber of the engine through the regenerator passage defined by the cylindrical wall member and the cylindrical displacer member; and a heating system provided with a heating zone separated from the first chamber by the end wall, wherein the cylindrical displacer part and the displacer end part together surround the cylindrical wall and the end wall, wherein the end wall defines the heating zone within the wall member.

The present invention relates to a single-cylinder internally heated hot air engine, which comprises: a cylinder body assembly, comprising a hot end cylinder body and a cold end cylinder body, the hot end cylinder body and the cold end cylinder body being butt-combined to form a sealed single cylinder body and being provided with a heat insulation ring therebetween; a first heat exchanger, which is arranged inside the hot end cylinder body and is in fluid communication with an external heat source and is used for heating a working gas in the hot end cylinder body; a second heat exchanger, which is arranged in the cold end cylinder body and is in fluid communication with an external cold source and is used for cooling a working gas in the cold end cylinder body; a piston, which is installed in the cylinder body assembly, the piston being provided with an airflow channel and an air valve, the airflow channel being used for communicating the working gases in the hot end cylinder body and in the cold end cylinder body, and the air valve being used for controlling the on-off of the airflow channel; and a piston rod, one end thereof being fixed to the piston, and the other end thereof being connected to a transmission mechanism outside the cylinder body. The hot air engine of the present invention involves a simple cylinder structure, has high pressure tolerance, and achieves a higher thermal power.

A hot air engine for converting heat into motion, comprising a wall member, comprising a cylindrical wall surrounding a central axis and an end wall extending through the central axis; a displacer member comprising a cylindrical displacer part co-axial with the cylindrical wall and a displacer end part extending through the central axis, the displacer member is movable, relative to the wall member, back and forth along the central axis to move a working fluid between a first chamber and a second chamber of the engine through the regenerator passage defined by the cylindrical wall member and the cylindrical displacer member; and a heating system provided with a heating zone separated from the first chamber by the end wall, wherein the cylindrical displacer part and the displacer end part together surround the cylindrical wall and the end wall, wherein the end wall defines the heating zone within the wall member.