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Hydraulic control system of extruder and control method implemented by hydraulic control system

A hydraulic control system and extrusion machine technology, applied in the direction of presses, manufacturing tools, mechanical equipment, etc., can solve the problems of difficult automatic and precise control, inconvenient maintenance, high operating costs, etc., to reduce heat generation, reduce energy consumption, fast response effect

Active Publication Date: 2015-04-08
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hydraulic control system of modern extruders mostly uses hydraulic oil as the medium, while the pump-accumulator drive with water as the medium is difficult to realize automatic and precise control, the life of the components is low, the operating cost is high, and the maintenance is inconvenient. use

Method used

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  • Hydraulic control system of extruder and control method implemented by hydraulic control system

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Embodiment Construction

[0016] Such as figure 1 As shown, the extruder hydraulic control system provided by this embodiment can be applied to a wide range of extrusion speed and high precision requirements, including a high-pressure gas tank 9, a piston accumulator 8, an accumulator isolation valve 7, a proportional Flow valve 6, accumulator oil supply inlet valve 5, high-frequency response proportional valve 4, main cylinder inlet valve 3, side cylinder inlet valve 2, fluid replenishment variable pump 1 and multiple parallel inlet variable pumps 16, 17, 18; the high-pressure gas tank 9 communicates with the air inlet of the piston accumulator 8 through a pipeline to provide air pressure compensation when supplying oil to the piston accumulator 8; the oil outlet of the piston accumulator 8 passes through the pipeline, and passes through the Accumulator oil supply inlet valve 5, proportional flow valve 6, and accumulator isolation valve 7 communicate with the main cylinder 11 of the extruder; the liqu...

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Abstract

The invention provides a hydraulic control system of an extruder and a control method implemented by the hydraulic control system. The hydraulic control system comprises high-pressure air tanks, piston energy accumulators, an energy accumulator isolating valve, a proportional flow valve, an energy accumulator oil supply liquid inlet valve, a high-frequency-response proportional valve, a master cylinder liquid inlet valve, a side cylinder liquid inlet valve, a liquid replenishing variable pump and a plurality of parallel liquid inlet variable pumps; the high-pressure air tanks are communicated with air inlets of the piston energy accumulators via pipelines; oil outlets of the piston energy accumulators are communicated with a master cylinder of the extruder by pipelines via the energy accumulator oil supply liquid inlet valve, the proportional flow valve and the energy accumulator isolating valve sequentially; the liquid replenishing variable pump is communicated with the oil outlets of the piston energy accumulators via check valves by pipelines; one channel of a main oil outlet of the parallel liquid inlet variable pumps is communicated with a large cavity with the master cylinder of the extruder and side cylinders of the extruder via the high-frequency-response proportional valve, the master cylinder liquid inlet valve and the side cylinder liquid inlet valve respectively; and another channel of the main oil outlet of the parallel liquid inlet variable pumps is respectively communicated with the master cylinder of the extruder and the side cylinders of the extruder via another master cylinder liquid inlet valve and other side cylinder liquid inlet valves. The hydraulic control system has the advantages of large extrusion speed variation range, capability of meeting high precision requirements, and the like.

Description

technical field [0001] The invention relates to a hydraulic control system, especially the application of pump-accumulator combined transmission in the hydraulic control system of an extruder, that is, the hydraulic control system of an extruder and its control method. Background technique [0002] The hydraulic control system of modern extruders mostly uses hydraulic oil as the medium, while the pump-accumulator drive with water as the medium is difficult to realize automatic and precise control, the life of the components is low, the operating cost is high, and the maintenance is inconvenient. use. Contents of the invention [0003] The purpose of the present invention is to provide an extruder hydraulic control system and its control method which can be applied to a wide range of extruding speed and require high precision. [0004] To achieve the above purpose, the present invention provides an extruder hydraulic control system, which is characterized in that it includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B15/16F15B11/04F15B1/02
Inventor 董晓娟权晓惠张立波荆云海
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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