Spherical ball expander

Abstract

The invention provides a spherical ball expander. The spherical ball expander comprises a sphere, a spherical shell and two balls, wherein the sphere and the spherical shell are concentric; a whole sphere bulge ring and two inward concave arc sphere grooves are arranged on the outer surface of the sphere, and the whole sphere bulge ring is formed by alternately connecting two T-shaped sphere bulgerings and two rectangular sphere bulge rings; an inward concave T-shaped spherical shell concave ring and an inward concave annular spherical shell groove are arranged on the inner surface of the spherical shell; an air inlet channel and an air outlet channel which communicate the outside with the annular spherical shell groove are formed in the spherical shell; the T-shaped spherical shell concave ring is embedded with the whole sphere bulge ring; the air inlet channel is stopped from communicating the outside with the annular spherical shell groove when the T-shaped sphere bulge rings passthe air inlet channel; the air inlet channel is enabled to communicate the outside with the annular spherical shell groove when the rectangular sphere bulge rings pass the air inlet channel. Accordingto the spherical ball expander, the function of an air inlet valve is realized by the sphere bulge rings, arrangement of the air inlet valve is omitted, manufacture cost is reduced, and the sphericalball expander further has the advantages of fewer machine parts, small clearance volume, compact structure and good motion balance.

Description

technical field [0001] The invention belongs to the technical field of energy, power and refrigeration, and in particular relates to a spherical ball expander. Background technique [0002] Organic Rankine cycle uses low-boiling point organic working fluid to convert medium and low temperature waste heat such as industrial waste heat, geothermal heat, solar energy and biomass energy into high-grade electric energy, and has great application potential in the utilization of medium and low temperature waste heat. The expander is a key component of the ORC and has a significant impact on its system performance. In addition, the expander can also be used as an important equipment of the refrigeration cycle in the field of refrigeration technology. Structurally, the expander can be divided into two categories: one is the centripetal turbine type, axial flow turbine type equal-speed expander; the other is the scroll type, piston type, screw type, rotary vane type, etc. type expan...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing expanders are high in cost, large in size, and due to imperfect structural design, the efficiency is low when applied to medium and low temperature heat sources

At present, there is still a lack of high-efficiency expanders suitable for organic Rankine cycle systems in China. The research in this area is still at the theoretical and experimental stage, and large-scale commercial production has not been carried out.

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