A high-efficiency expansion device for inert mixed gas bearing

Abstract

The invention discloses an inert mixed gas bearing high-efficiency expansion device, which comprises: an air intake and exhaust system, a rotor system, a bearing support system, a thrust bearing and a radial bearing; The two gaskets are connected to the bearing support system, the rotor system is installed in the air intake and exhaust system and the bearing support system, and the front thrust bearing, the rear thrust bearing, the front radial bearing and the rear radial bearing are installed between the rotor system and the bearing support system. Bearing; the rotor system rotates in the intake and exhaust system and the bearing support system, the radial force is transmitted to the bearing support system through the front radial bearing and the rear radial bearing, and the axial force is transmitted to the bearing support system through the front thrust bearing and the rear thrust bearing. Bearing support system. The invention can reduce the pressure of a certain flow of inert mixed gas to 1 / 1.5-1 / 2.5 of the initial pressure, the rotation speed is 50000r / min-100000r / min, and the energy conversion efficiency is 88%.

Description

technical field [0001] The invention belongs to the technical field of turbines, and relates to an inert mixed gas bearing high-efficiency expansion device. Background technique [0002] The expansion device is a type of device that converts the thermal energy of the gas into kinetic energy and mechanical energy, thereby obtaining low-temperature gas or outputting shaft work. The general expansion device consists of a guide device, a rotor system, a bearing support system and a lubrication system. The guide device converts the high temperature and high pressure low-speed gas into high-speed gas, and provides a suitable inlet airflow angle for the rotor. The high-speed gas blows the rotor to rotate and output shaft work to obtain relatively low-temperature gas to complete the energy conversion. The bearing support system provides radial support for the rotor and bears the axial force of the rotor. The lubrication system provides lubrication for the bearing, takes away the h...

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Problems solved by technology

[0004] When the general expansion device directly uses the inert mixed gas, there is a certain flow separation in the guide device, the aerodynamic profile of the rotor blade and the air flow channel, resulting in energy loss, so the energy conversion efficiency is low

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