Gas-liquid auxiliary supporter for a dry granulator

摘要

The present invention provides a gas-liquid auxiliary supporter for dry granulator including a hydraulic cylinder housing, a lower air piston, a plunger, an upper cover and an upper air piston, wherein the hydraulic cylinder housing is arranged with a hydraulic oil inlet, the lower air piston is arranged with an oil channel for hydraulic oil to flow through, an opening at one end of the oil channel connects to the hydraulic oil inlet on the hydraulic cylinder housing, while an opening at the other end of the oil channel is arranged on the lower end face of the lower air piston, the plunger is arranged in the opening arranged at the lower end face of the lower air piston, the upper cover is fixedly connected to the upper end face of the hydraulic cylinder housing, the upper air piston is disposed in the upper cover with sliding fit, a containing chamber is defined by the lower end face of the upper air piston, the upper end face of the lower air piston and the hydraulic cylinder housing. By adopting such structure, the gas-liquid auxiliary supporter can provide support when the dry granulator runs, and the supporting force can be withdrawn when dry granulator stops, and the supporting force provided can be kept at a constant value to ensure the dry granulator works stably.

主权项

1. A gas-liquid auxiliary supporter for dry granulators, characterized in that the gas-liquid auxiliary supporter comprises a hydraulic cylinder housing, a lower air piston, a plunger, an upper cover, and an upper air piston; wherein the hydraulic cylinder housing has a hydraulic oil inlet, and the lower air piston has an oil channel for hydraulic oil to flow through; a first opening at one end of the oil channel is connected to the hydraulic oil inlet, while a second opening at the other end of the oil channel is arranged on a lower end face of the lower air piston and the plunger is disposed inside the second opening; the upper cover is fixed to an upper end face of the hydraulic cylinder housing; the upper air piston is fitted into the upper cover with sliding fit; a containing chamber is defined by a lower end face of the upper air piston, an upper end face of the lower air piston and the hydraulic oil cylinder housing, wherein the upper air piston has an outer circumferential surface with a step, and a shoulder mating the step surface is arranged on an inner circumferential surface of the upper cover; a cushioning air chamber between the upper air piston and the upper cover is defined by the shoulder of the upper cover, the step surface of the upper air piston, the inner circumferential surface of the upper cover and the outer circumferential surface of the upper air piston.