PROPORTIONAL VALVE OF MANAGEMENT OF HYDROMECHANICAL TRANSFER FREQUENCIES Russian patent published in 2017 - IPC F15B13/44 F16H61/06 

FIELD: machine engineering.

SUBSTANCE: valve includes coaxially arranged first stage, made in the form of a pressure regulator, and a second stage in the form of a regulator-distributor of the main flow of the working fluid. The valve contains two additional throttles: a choke of the pressure control chamber formed in the valve body and an inter-chamber choke installed between the pressure regulating chamber and the control chamber of the regulating valve. The ball valve is installed in the valve chamber of the valve body with a radial clearance characteristic of the precision pair. The pusher of the proportional electromagnet is installed in the hole of the electromagnet body with a radial clearance characteristic of the precision pair; the end face of the supporting head contacting the armature of the electromagnet is spherical, longitudinal grooves are provided on the cylindrical surface of the shaft to communicate the cavity of the armature of the electromagnet with the port of draining the working fluid.

EFFECT: improving the quality and stability of the pressure control characteristics in the control of hydro-mechanical transmission clutches and reducing the flow of working fluid to the drain through the pressure regulator during the control process.

4 cl, 5 dwg