Horomill hydraulic circuit with fast and smooth pressure-adding function

Abstract

The invention provides a horomill hydraulic circuit with fast and smooth pressure-adding function. The hydraulic circuit comprises a high-pressure oil pump, an electromagnetic overflow valve, hydraulic control check valves, a pressure transmitter II, an accumulator II and a difunctional hydraulic oil cylinder, wherein the high-pressure oil pump is connected with the two hydraulic control check valves through the electromagnetic overflow and a electromagnetic change-over valve; the fluid control check valve I and the hydraulic control check valve II are separately connected with the rod cavity and rodless cavity of the difunctional hydraulic oil cylinder; and a pressure-adding mechanism composed of a check valve, a pressure transmitter I, a two position two-way electromagnetic change-over valve and a accumulator I is arranged between the electromagnetic overflow valve and the electromagnetic change-over valve, the two position two-way electromagnetic change-over valve is also connected with the accumulator II and the rod cavity of the difunctional hydraulic oil cylinder, and the pressure-adding mechanism is used to supply the pressure for the rod cavity of the difunctional hydraulic oil cylinder and the accumulator II. The hydraulic circuit of the invention has reasonable design, simple structure and good fast and smooth pressure-adding function so as to ensure the smooth working pressure of the hydraulic circuit and increase the grinding efficiency and operational reliability of the horomill.

Description

technical field [0001] The invention relates to a hydraulic circuit, in particular to a horizontal roller mill hydraulic circuit with fast and stable pressure replenishment function. Background technique [0002] The existing horizontal roller mill hydraulic circuit is usually composed of a high-pressure oil pump, an electromagnetic overflow valve, an electromagnetic reversing valve, a hydraulic control check valve, a pressure transmitter, an accumulator, and a double-acting hydraulic cylinder. The ends of the two piston rods are respectively connected with the two ends of the pressure rollers of the horizontal roller mill. When the horizontal roller mill is working, the high-pressure oil pump starts to pressurize the rod cavity and accumulator of the double-acting hydraulic cylinder. When the system pressure reaches the set working pressure, the high-pressure oil pump stops working, and the horizontal roller mill enters the working state; During the working process of the ...

AI Technical Summary

Problems solved by technology

However, because the existing hydraulic circuit uses a high-pressure oil pump to supplement the pressure of the rod chamber and accumulator of the double-acting hydraulic cylinder, the high-pressure oil pump frequently starts to supplement pressure when the hydraulic circuit is under high pressure, which makes the high-pressure oil pump itself damaged. At the same time, the speed of the high-pressure oil pump is relatively slow, which directly affects the grinding efficiency of the horizontal roller mill.

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