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Hydraulic system of stepless speed regulation hydropress

A technology of stepless speed regulation and hydraulic system, applied in the field of hydraulic system of hydraulic presses, can solve the problems of low control accuracy and poor anti-eccentric load capacity, so as to solve the problem of low control accuracy, improve synchronization accuracy, and improve anti-eccentric load capacity. Effect

Active Publication Date: 2014-08-13
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a stepless speed regulation hydraulic machine hydraulic system, which solves the problems of low control precision and poor anti-eccentric load capacity existing in the existing deviation correction synchronous control system

Method used

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  • Hydraulic system of stepless speed regulation hydropress
  • Hydraulic system of stepless speed regulation hydropress
  • Hydraulic system of stepless speed regulation hydropress

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Embodiment Construction

[0030] figure 1 The oil ports of the hydraulic valves are marked in accordance with GB-T17490-1998.

[0031] like figure 1 As shown, the present invention includes a first hydraulic cylinder N1, a second hydraulic cylinder N2, a slider O, a first flow pump W1, a second flow pump W2, a third flow pump W3, a first servo valve I1, a second servo valve I2, the third servo valve I3, and the fourth servo valve I4, the first flow pump W1, the second flow pump W2, and the third flow pump W3 are respectively driven by the first motor M1, the second motor M2, and the third motor M3 ;

[0032] like figure 2 As shown, the structure of the first hydraulic cylinder N1 and the second hydraulic cylinder N2 is exactly the same, and each is composed of a cylinder body 1A, a piston 1B, and a fixed plunger 1C, and the cylinder body 1A, the piston 1B, and the fixed plunger 1C are respectively A cylindrical rotating body with a cylindrical inner cavity, the central axis of the three is coaxial...

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Abstract

The invention provides a hydraulic system of a stepless speed regulation hydropress, belongs to the hydraulic system of a hydropress, and solves the problems that an existing deviation-rectifying synchronous control system is not high in control precision and has a bad capability of resisting unbalance loading. The hydraulic system comprises a first hydraulic cylinder, a second hydraulic cylinder, a sliding block, a first flow pump, a second flow pump, a third flow pump, a first servo valve, a second servo valve, a third servo valve and a fourth servo valve, wherein the first flow pump, the second flow pump and the third flow pump are respectively driven by a first motor, a second motor and a third motor. By applying the hydraulic system, the stepless speed regulation can be available within a certain scope, and the problem that a stepless speed regulation technology of a traditional hydropress is narrow in adaptive aspect is solved; according to different speeds, a different quantity of flow pumps are used; the direct return of large-flow high pressure liquid to an oil tank is avoided, so that the energy can be effectively saved; when one small flow pump and the servo valve connected with the small flow pump are adopted for synchronous regulation, the precision of synchronization between the first hydraulic cylinder and the second hydraulic cylinder is effectively improved, and the unbalance loading resistance capability of equipment is improved.

Description

technical field [0001] The invention belongs to the hydraulic system of a hydraulic machine, in particular to a hydraulic system of a hydraulic machine with stepless speed regulation. Background technique [0002] A hydraulic press is a pressure device widely used in industrial manufacturing, which has a large force output. At present, the hydraulic press mainly adopts the method of adjustable speed in stages, that is, it can only work at a limited number of speeds, and when the tonnage of the press is large or the table is wide, multi-cylinder synchronous drive is often used. For multi-cylinder synchronous drive systems, the key is multi-cylinder synchronous control, especially for multi-station presses, because the pressure at each station is different, that is, the liquid flow of each cylinder is different due to eccentric load, so synchronous control is difficult . Currently widely used synchronous control includes rigid synchronous, shunt synchronous and rectifying sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/22F15B11/17F15B11/04
Inventor 金俊松王新云邓磊夏巨谌
Owner HUAZHONG UNIV OF SCI & TECH
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