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Load port flow pulse independent control digital hydraulic servo system and control method

A pulse digital, hydraulic servo technology, applied in fluid pressure actuation system testing, fluid pressure actuation system components, servo motors, etc.

Active Publication Date: 2021-07-16
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it also has the functions of status monitoring and automatic fault diagnosis.

Method used

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  • Load port flow pulse independent control digital hydraulic servo system and control method
  • Load port flow pulse independent control digital hydraulic servo system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, in this embodiment, a digital hydraulic servo system based on a high-frequency stepless speed regulation intelligent digital valve independently controls the load port flow pulse, including a high frequency response stepless speed regulation intelligent digital valve 7, a hydraulic cylinder 14, and an electrical control system. Device 19 and control valve; the specific structure is:

[0030] The main pressure pipeline P0 is connected to the oil port P of the solenoid valve 12 through the filter 11; the oil port B of the solenoid valve 12 is connected to the oil port P of the high-frequency stepless speed regulation intelligent digital valve 7; the main oil return line T0 is respectively connected to the oil port T of the solenoid valve 12 and the oil port T of the high-frequency stepless speed regulation intelligent digital valve 7 through the oil port B of the fifth one-way valve 405 through the oil port A; the main pressure pipeline P0 passe...

Embodiment 2

[0054] Such as figure 2 As shown, it is another embodiment of the present invention. The first embodiment is the intelligent control technology and automatic fault diagnosis method of the load port flow pulse independent control of the high pollution resistance digital hydraulic servo system with high frequency response speed stepless adjustment, The high-frequency response speed stepless adjustment function of the hydraulic cylinder 14 is realized. figure 2 The second embodiment is an independent control of flow pulse at the load port with high frequency response and low speed operation, high pollution resistance digital hydraulic servo system intelligent control technology and automatic fault diagnosis method, because there is no large flow control of proportional flow valve, it is especially suitable for In the case of low-speed control of the hydraulic cylinder 14, the low-speed intelligent control and fault automatic diagnosis functions of the hydraulic cylinder 14 are ...

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Abstract

The invention discloses a load port flow pulse independent control digital hydraulic servo system and a control method, which are used for accurately controlling the position of a hydraulic cylinder. The high-precision control function of the hydraulic cylinder is achieved by adopting a logic array of a flow pulse control intelligent digital valve, load oil way liquid resistance decoupling control of the hydraulic cylinder is achieved through load parameter identification control of an electrical controller, all working points can achieve the optimal control performance and the energy-saving effect, and the problems that a traditional servo valve is high in failure rate and serious in oil liquid heating under the severe service working condition are solved. In addition, the digital control technology of the flow pulse control intelligent digital valve is directly connected with a computer, electrical control is simple, and the technical problems that a traditional servo electrical control system is poor in anti-interference capacity and difficult to maintain are solved; and moreover, based on the fusion technology of the flow pulse control intelligent digital valve and multiple sensors, the intelligent control function of online state monitoring and automatic fault diagnosis of the whole life cycle of the hydraulic system is achieved.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a digital hydraulic servo system and control method for independent control of flow pulse at a load port. Background technique [0002] On-line thermal width adjustment technology is to change the width of the slab by controlling the position of the narrow side of the mold, such as the Chinese patent authorization announcement number: CN105757065B structure of a mold taper online maintenance hydraulic control system, which can be set according to the process of the mold Taper, the current position (real-time position) of the hydraulic cylinder is detected by a displacement sensor, and compared with the theoretical value by means of a comparator. When the actual value deviates from the theoretical value, the comparator controls the servo valve, and the servo valve controls the hydraulic cylinder to realize the on-line position control function of the crystallizer taper r...

Claims

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Application Information

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IPC IPC(8): F15B11/08F15B13/04F15B15/28F15B21/041F15B19/00F15B21/08
CPCF15B11/08F15B13/0401F15B15/2815F15B21/041F15B19/005F15B21/08F15B2211/8636F15B2215/30
Inventor 丘铭军张永锋宁博解通护雷丛卉王亚强赵春丽
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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