High pressure diaphragm compressor overflow structure and overflow method for hydrogen refueling station and high pressure diaphragm compressor for hydrogen refueling station

Abstract

The invention belongs to the field of diaphragm compressors, and particularly relates to a high pressure diaphragm compressor overflow structure and overflow method for a hydrogen refueling station and a high pressure diaphragm compressor for the hydrogen refueling station. The oil overflow structure comprises a main overflow valve structure, a high pressure protection structure and an unloading structure, wherein the unloading structure is used for discharging air mixed in an oil cylinder at the initial operation stage of the compressor; and the overflow pressure of the high pressure protection structure is set to be about 1.3 to 1.5 times the discharge pressure and is higher than the oil overflow pressure of the main overflow valve. When the pressure of hydraulic oil is higher than a setpressure of the main overflow valve, the overflow valve works, and the high pressure protection structure does not work. When the hydraulic oil in the oil cylinder cannot be discharged in time, the oil pressure rises and is higher than the set pressure of the high pressure protection structure, the overflow valve and the high pressure protection structure work simultaneously, and excess hydraulicoil is discharged in time. The problem that the overflow valve cannot discharge the hydraulic oil in time under the high pressure condition, and consequently the service life of a diaphragm and a cylinder head is affected, and the power consumption of the compressor is increased are solved.

Description

technical field [0001] The invention belongs to the field of diaphragm compressors, and in particular relates to an overflow structure and overflow method of a high-pressure diaphragm compressor for a hydrogenation station and a high-pressure diaphragm compressor for a hydrogenation station. Background technique [0002] With the increasing tension of global energy sources, the development of green energy has become an inevitable trend in the world. In the future, clean and renewable energy will definitely be favored. In the process of energy development, hydrogen energy is regarded as the main energy source for future development, and hydrogen fuel cells Technology has always been considered as the ultimate solution to the future human energy crisis by utilizing hydrogen energy. During the use and storage of hydrogen, if you want to continuously develop and use hydrogen technology, you must increase the pressure of hydrogen during use as much as possible. High-pressure diap...

AI Technical Summary

Problems solved by technology

For ordinary hydraulic oil relief valves, if the hydraulic oil is to be quickly discharged from the oil chamber, its flow area needs to be increased. However, under high pressure, the flow area of ​​the relief valve is limited because the large flow area The flow area means that the thrust of the rod and spring inside the relief valve is also greatly increased, which may cause the relief valve to be pushed open by the hydraulic oil before the gas side reaches the exhaust pressure. Increasing the pre-compression or stiffness of the spring will adversely affect the stability of the spring and the relief valve itself. At this time, limited by the limited flow area, the hydraulic oil pressure in the cylinder will be driven by the piston. Continue to rise, affecting the normal operation of the compressor

Images