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Energy-saving and consumption-reducing hydraulic system with multistage pressure control for large hydraulic machine

A hydraulic system and hydraulic press technology, applied in the field of pressure multi-level control hydraulic system, can solve the problems of reduced pressure regulation accuracy, increased energy consumption, and reduced overall machine efficiency, avoiding energy consumption, reducing leakage, and improving pressure regulation accuracy. Effect

Inactive Publication Date: 2011-08-31
HEFEI METALFORMING MACHINE TOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This adjustment method is used in equipment with relatively large main tonnage and relatively fast working speed, because the adjustment of the system pressure does not reduce the power consumption of the oil pump and the motor, so it will produce a large energy waste when the system pressure is reduced.
The efficiency of the whole machine decreases, and the energy consumption increases; and the pressure adjustment range is too large, which will greatly reduce the pressure adjustment accuracy

Method used

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  • Energy-saving and consumption-reducing hydraulic system with multistage pressure control for large hydraulic machine

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Embodiment Construction

[0015] Referring to the attached drawings, the pressure multi-stage control hydraulic system for energy-saving consumption of large hydraulic presses, in the large hydraulic press system, the principle of group control of oil cylinders can be used on equipment with three cylinders and above. The main oil cylinder is a plunger cylinder, and the rest For the piston cylinder, there are two 500-ton oil cylinders 10, two 1,000-ton oil cylinders 11, and 2,000-ton oil cylinders 12. Three kinds of plug-ins are designed in the system, namely No. 1 plug-in 1, No. 2 plug-in 2, No. 3 plug-in 3, Each plug-in is controlled by electromagnets 3Y7.1, 3Y7.2, 3Y7.3 to switch off and on, so as to achieve independent control of the oil circuit in the upper chamber of the main cylinder and the side cylinder, and combine them into different main tonnages to meet different requirements. According to the process requirements, the attached drawings can be matched into five main tonnages of 1000T, 2000T,...

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Abstract

The invention discloses an energy-saving and consumption-reducing hydraulic system with multistage pressure control for a large hydraulic machine, which comprises a main cylinder, a plurality of groups of side cylinders and a plurality of oil pump motor sets, wherein inserts are connected to individual upper cavity oil paths or merged upper cavity oil paths at the oil inlets of the main cylinder and the side cylinders; and the inlet ends of the inserts are connected with oil supply pipelines of the oil pump motor sets. The energy-saving and consumption-reducing hydraulic system with multistage pressure control for a large hydraulic machine is applied to main tonnage multi-section regulation combination of the large hydraulic machine, and can be divided into multiple sections to enable different pressure-regulating ranges so as to improve pressure-regulating precision. Due to the adoption of the energy-saving and consumption-reducing hydraulic system with multistage pressure control for a large hydraulic machine, system leakage factors are reduced and energy consumption of a motor during idling is avoided. Full-power work of the motor is fully utilized so that maximum working efficiency is reached.

Description

[0001] technical field [0002] The invention relates to a pressure multi-stage control hydraulic system for energy saving and consumption of a large hydraulic press, more specifically, it is applied to a main tonnage pressure multi-stage control hydraulic system of a large hydraulic press. [0003] Background technique [0004] It is currently known that the main tonnage change of a large hydraulic machine is generally by adjusting the system pressure to change the output pressure of the working cylinder, that is to say, no matter how the main tonnage changes, all oil pump motor units in the system must participate in work. This adjustment method is used in equipment with relatively large main tonnage and relatively fast working speed, because adjusting the system pressure does not reduce the power consumption of the oil pump and motor, so it will generate a large energy waste when the system pressure is reduced. The efficiency of the whole machine decreases, and the energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B30B15/16F15B11/16
Inventor 张海杰袁隆秀
Owner HEFEI METALFORMING MACHINE TOOL
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