Temporary flushing gas source system for supplying gas to high-pressure gas bearing and design method thereof

Abstract

The invention discloses a temporary flushing gas source system for supplying gas to a high-pressure gas bearing and a design method thereof. The system comprises a high-pressure gas generating section, a gas flow stabilizing section, a pressure regulating section and a gas flow output section, and the high-pressure gas generating section, the gas flow stabilizing section, the pressure regulating section and the gas flow output section are connected in sequence. The problem that an existing temporary flushing gas source system cannot be applied to a high-pressure gas bearing experiment table due to excessive gas supply flow is solved. The system has the characteristics of economy, reliability, good output airflow pressure stability, adjustable set pressure, convenience in operation and thelike. By using a pressure regulating method based on a two-stage series self-operated pressure regulating valve, the difficulty that a single-stage annular gap pressure regulating valve commonly usedat present cannot be applied to a high-pressure gas bearing temporary flushing gas source system due to overlarge size is overcome, and the defect of low pressure stabilizing precision caused by quickchange of the position of the valve port due to continuous pressure drop in the air storage tank when only a one-stage self-operated pressure regulating valve is adopted for pressure regulation is also overcome.

Description

technical field [0001] The invention relates to an experimental gas source for a high-pressure gas bearing, in particular to a temporary flushing gas source system and a design method for supplying gas to a high-pressure gas bearing. Background technique [0002] At this stage, the air supply pressure of commonly used low-supply pressure gas bearings is about 0.8 MPa, which is the same as the air source pressure of ordinary pneumatic transmission systems; the working gap of low-supply pressure gas bearings is about 20 μm, and the gas mass flow rate consumed during work very small, about 10 -4 kg / s level, so its air supply source can be used in common with that of ordinary pneumatic transmission systems. The air supply pressure of high-pressure gas bearings can exceed 5MPa, and the working gap is greater than 100μm. The mass flow rate of gas consumed during work is 2 to 3 orders of magnitude larger than that of low-pressure gas bearings. The air source pressure of ordinary p...

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Problems solved by technology

The air supply pressure of high-pressure gas bearings can exceed 5MPa, and the working gap is greater than 100μm. The mass flow rate of gas consumed during work is 2 to 3 orders of magnitude larger than that of low-pressure gas bearings. The air source pressure of ordinary pneumatic transmission systems is low, and the capacity Small, cannot be used as an experimental gas source for high-pressure gas bearings

[0003] At present, the temporary flushing wind tunnel or temporary flushing air source used in aircraft model experiments adopts a specially designed annular gap pressure regulating valve with excellent pressure regulating performance as the pressure regulating device of the system, but this annular gap pressure regulating valve The valve series products are large in size, and the smallest one is above Φ300mm, which cannot be applied in 10 -1 In the gas source of the high-pressure gas bearing experiment at the kg / s flow level

[0004] It can be seen that the existing temporary gas source system is not suitable for the experimental gas source of high-pressure gas bearings, and it is urgent to design a temporary gas source system that can be used in high-pressure gas bearing experiments and has higher precision of pressure stabilization

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