PROPORTIONAL ELECTROHYDRAULIC DISTRIBUTOR OF INDIRECT ACTION Russian patent published in 2022 - IPC E21D23/16 F15B13/02 F16K31/40 

FIELD: mining industry.

SUBSTANCE: invention relates to an electrohydraulic control system for the actuators of tunneling combines. The proportional electrohydraulic distributor of indirect action contains a pilot proportional distributor and a power spool-type four-line three-position hydraulic distributor. The pilot proportional distributor is rigidly screwed through a throttle plate with adjustable throttles with a power spool-type four-line three-position hydraulic distributor. The pilot proportional distributor consists of a hydraulic housing with a sleeve pressed into it, a rotary spool clamped on one side with a stop cap and on the other side through a connecting return clutch. The return clutch consists of a lever spring-loaded on both sides by return springs. The return clutch ensures the return of the rotary spool to the initial zero position. Also, the output clutch consists of the output shaft of a hybrid stepper motor, also designed to rotate the rotary spool, and an electronic device mounted on a hybrid stepper motor and controlling a stepper motor. The stepper motor consists of a control board and a sensor for the angle of rotation of the spool. The drain channel of the pilot proportional distributor is connected to the main drain channel of the power distributor, and its address channels are connected to the control channels of the power distributor.

EFFECT: expansion of the arsenal of proportional electrohydraulic distributors of indirect action in explosion-proof mine design, while reducing power consumption while maintaining overall connection and weight characteristics.

1 cl, 3 dwg