Digital speed regulating valve for aligning hydraulic supports in fully mechanized mining face and control method thereof

A speed regulating valve, comprising:

• a valve core, provided with an internal channel and in communication with an inlet of the speed regulating valve, wherein a first speed regulating port is arranged on the valve core;
• and
• a valve base, in communication with an outlet of the speed regulating valve, wherein a second speed regulating port is arranged on the valve base;
• wherein the valve core and the valve base are rotatable relative to each other, and the second speed regulating port is on a trajectory of a rotation of the first speed regulating port;
• and when the valve core and the valve base rotate relative to each other, the first speed regulating port and the second speed regulating port are gradually aligned to communicate the inlet and the outlet of the speed regulating valve;
• and
• a fixed differential pressure reducing device is arranged between the inlet of the speed regulating valve and the valve core, the fixed differential pressure reducing device is provided with a sealing part, a first end of the sealing part is in communication with the inlet of the speed regulating valve, and a second end of the sealing part is in communication with the outlet of the speed regulating valve, to balance a pressure difference between the outlet and the inlet of the speed regulating valve.