Self-lubricating vortex expansion power generation set

Abstract

The invention discloses a self-lubricating vortex expansion power generation set. The self-lubricating vortex expansion power generation set comprises a vortex expansion machine arranged in a closed shell and a power generator. The vortex expansion machine is close to an air suction port of the closed shell. The power generator is close to an exhaust port. The vortex expansion machine comprises a static vortex disc and a movable vortex disc which are engaged with each other to form an expansion cavity. The power generator comprises a power generator stator and a power generator rotor. One end of a rotary shaft of the power generator rotor is connected with the movable vortex disc. An axial lubricating oil channel which is through in the axial direction and a radial lubricating oil channel communicated with the axial lubricating oil channel are formed in the rotary shaft. The position of the radial lubricating oil channel corresponds to the installation position of a bearing on the rotary shaft. An inverted-V-shaped oil supplying piece which is driven by the rotary shaft and used for supplying oil to the axial lubricating oil channel is arranged in the other end of the rotary shaft. According to the self-lubricating vortex expansion power generation set, the structure of a lubricating system is simple, all machine parts relatively moving can be well lubricated, working medium expansion efficiency is high, the power generation efficiency of the set is high, and the sealing performance of the set is good; leakage of working media is avoided, and operating is reliable.

Description

technical field [0001] The invention relates to the fields of generators and thermoelectric conversion, in particular to a self-lubricating vortex expansion generator set, which is applied to an organic Rankine cycle system to realize the conversion of heat energy into electric energy. Background technique [0002] In recent years, the use of organic refrigerant Rankine cycle (ORC) has been rapidly developed in low-temperature heat sources for work and power generation equipment. Electric energy is a high-grade energy form, and it is undoubtedly very attractive to convert low-grade heat energy into electric energy. Volumetric expanders are often used in small and medium-sized ORC generator sets. Among them, scroll expanders are widely used because of their advantages such as fewer parts, simple and compact structure, small volume, high volumetric efficiency, small air flow pulsation, and less leakage. [0003] But for a long time, the scroll expander has insufficient lubrica...

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Problems solved by technology

[0003] But for a long time, the scroll expander has insufficient lubrication of mechanical parts or too complicated lubricating oil system

For example, Chinese patent 201110363398.1 discloses a vortex expansion generator and a Rankine cycle thermoelectric conversion system. The lubrication method adopted is: the lubricating oil pipeline passes through the side wall of the casing, and one end located in the casing is connected to the oil inlet hole of the bracket One end located outside the housing is connected to the external high-pressure and low-temperature lubricating oil input device, wherein the high-pressure and low-temperature lubricating oil input device includes a condenser, a high-pressure pump and a filter connected in sequence through pipelines. The entire lubrication system has a complex structure, and the top of the shaft The mating surface with the movable scroll is difficult to be lubricated, and the lubricating effect is poor

As another example, Chinese patent 201310021129.6 discloses a highly efficient and reliable vortex expansion generator. The lubrication method adopted is: the working medium is mixed with lubricating oil, and the lubricating oil completely enters from the inlet of the expander with the working medium, and the The working medium is splashed around by the rotating collision of the balance weight synchronously rotating with the crankshaft and the action of centrifugal force, so that the lubricating oil in the working medium is sprayed on the parts around the balance weight. The lubricating oil has very good miscibility and is difficult to separate. Most of the lubricating fluid entering the lubricating parts is working fluid, so the lubricating effect is poor, and the lubricating oil containing high-pressure working fluid will increase the back pressure of the working fluid after expansion, affecting the expansion efficiency; At the same time, it is difficult to ensure that the lubricating oil can reach the parts or parts that need to be lubricated by using the balance weight to splash and spray the lubricating oil, and the lubricating effect is difficult to guarantee

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