Hydraulic control system of powdered coal forming machine

Abstract

The invention relates to a control method of a hydraulic control system of a powdered coal forming machine, and the system mainly consists of an electric motor, a variable vane pump, a variable displacement piston pump, a forming oil cylinder, a die oil cylinder and a feeding oil cylinder, wherein the forming oil cylinder, the die oil cylinder and the feeding oil cylinder are respectively connected with an oil inlet pipeline and an oil return pipeline; the electric motor is used for simultaneously controlling the variable vane pump and the variable displacement piston pump which are connected in parallel; the variable vane pump is connected with the oil inlet pipeline through a check valve; and the variable displacement piston pump is connected with the oil inlet pipeline through an overflow valve. By reversing and regulation and control of each valve, not only is the continuous performance of the whole working flow high, but also high pressure is ensured to be realized under the condition of low power consumption in the forming process. All the oil cylinders actuate sequentially so as to realize the continuity of charging, forming, discharging and carrying away so as to greatly improve the production efficiency of the machine type.

Description

[0001] technical field [0002] The invention relates to a hydraulic control system, in particular to a hydraulic control system of a pulverized coal forming machine. Background technique [0003] At present, the pulverized coal forming machines sold on the market mainly include the following: 1. Extrusion-type coal honeycomb machine, the publication number is CN1063074, which has a simple structure and small volume; 2. Small continuous extrusion mobile coal honeycomb machine, its public No. CN86217812, this mechanical product is relatively material-saving, low-noise and easy to use; 3. Pulverized coal hydraulic automatic forming machine, its publication number is CN2182332, which is characterized by the hydraulic control element to control the sequential action of the oil cylinder, the pulverized coal Extrusion. The main disadvantages of the above models are that the hydraulic control system cannot achieve the continuity of the overall movement, the continuous production p...

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Problems solved by technology

The main disadvantage of the above models is that the hydraulic control system cannot achieve the continuity of the overall movement, the production continuity is poor, and the degree of automation is low; secondly, the adjustment between the pressure and the working speed is not perfect, the pulverized coal is poorly formed, and the energy consumption is large. , so that this type of equipment cannot be promoted and used

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