Ultra-low temperature and ultra-high pressure liquid hydrogen pump

Abstract

The invention relates to the field of pump bodies, and discloses an ultra-low temperature and ultra-high pressure liquid hydrogen pump, which comprises a pump body (1), which is provided with a liquid inlet valve (2) and a liquid outlet valve (3), and the pump body (1) A piston rod (4) for controlling liquid discharge is also arranged inside, a sealing structure (5) is arranged on the piston rod (4), and a temperature regulating plate (101) is also arranged on the pump body (1). The sealing structure (5) in the present invention is connected in a certain order by a plurality of small parts and sleeved on the piston rod (4), and nitrogen gas is filled into the inside through the air filling hole (5b1) of the sealing bushing (5a1), It is sealed by nitrogen gas at high pressure and normal temperature, which has good sealing effect and is resistant to low temperature and high pressure; the liquid inlet valve (2) automatically controls the entry of liquid hydrogen through pressure, and the liquid outlet valve (3) is automatically controlled through the pressure of the liquid body, and The elastic force of the pressure spring (5c) cooperates with the conical head (1c1) for sealing, which ensures the high pressure and prevents the valve from being opened by the low pressure liquid.

Description

technical field [0001] The invention relates to the field of pump bodies, in particular to an ultra-low temperature and ultra-high pressure liquid hydrogen pump. Background technique [0002] In the existing sealing structure of the pump body, its working environment must be considered in the design. The valves used in the environment with high pressure and low temperature have high requirements on the sealing structure of the piston rod, the most important of which is to have the ability to resist pressure and maintain a stable sealing effect. In the prior art, Most of the seals on the valve piston rod are Y-shaped rubber rings and "O"-shaped sealing rings. Among these seals, the "O"-shaped Made of rubber material, its compression resistance is obviously insufficient. For high pressure, especially above 70MPa, on the one hand, the "O" type sealing ring is easy to squeeze out, deform and cause leakage. In addition, the poor sealing effect of the liquid hydrogen pump will ca...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor sealing effect and poor adaptability in the prior art, the present invention provides an ultra-low temperature and ultra-high pressure liquid hydrogen pump

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