The invention discloses a
mechanical pressure automatic
regulator of an
underwater booster pump spacer
fluid system. The
mechanical pressure automatic
regulator comprises a supply valve and a release valve. The supply valve is provided with a first transportation cavity and a first
pilot cavity, a supply valve element control spacer
fluid supply outlet is arranged in the first transportation cavity, a first
pilot piston is arranged in the first
pilot cavity and connected with the supply valve element through a first valve rod, the first valve rod is sleeved with a first corrugated
pipe to form a first working medium cavity, and a first spring is arranged in the first transportation cavity. The release valve is provided with a second transportation cavity and a second pilot cavity, a release valve element control spacer fluid release outlet is formed in the second transportation cavity, a second pilot
piston is arranged in the second pilot cavity and connected with the release valve element through a second valve rod, the second valve rod is sleeved with a second corrugated
pipe to form a second working medium cavity, and a second spring is arranged in the second transportation cavity. On the basis of a
pressure difference dominated adjusting mode, supply and
discharge of the spacer fluid are automatically adjusted by sensing the
pressure difference between the spacer fluid and the working medium, and the
pressure balance of the
system is maintained.