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Numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control

An electromagnetic directional valve, digital variable technology, applied in fluid pressure actuation devices, fluid pressure actuation system components, servo motor components, etc., can solve problems such as poor control accuracy, large valve flow pulsation, and zero dead zone. , to achieve the effect of improving reliability, avoiding flow fluctuations and eliminating dead zones

Inactive Publication Date: 2015-11-11
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages are: the characteristics of the valve lead to zero dead zone and saturation zone, and the large flow pulsation of the valve leads to poor control accuracy

Method used

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  • Numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control
  • Numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control
  • Numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The present invention is a digital variable pump based on the binary flow control of multi-channel electromagnetic reversing valves. The structure of the pump body is as follows: figure 1 As shown, it includes multi-channel electromagnetic reversing valve 1, quantitative pump 2, motor 3, check valve 4, flow sensor 5, pressure sensor 6, power supply, power amplifier circuit, encoding circuit, single-chip microcomputer, A / D converter, D / A converter and signal processing circuit. Wherein, the flow sensor 5, the pressure sensor 6, the power supply, the power amplifier circuit, the encoding circuit, the single-chip microcomputer system, the A / D converter, the D / A converter, and the signal processing circuit constitute the control part. The main body of the digital variable pump is a quantitative pump 2, and the variable mechanism of the variable pump incl...

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Abstract

The invention discloses a numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control. The main body of the pump is a metering pump; the flow regulation of surplus flow overflow is realized by the on-off of n submodules of a designed multichannel solenoid directional valve; a flow sensor and a pressure sensor are mounted in a main oil circuit; output ends of the flow sensor and the pressure sensor are connected with a signal processing circuit; processed signals are transmitted to a single chip microcomputer by an A / D converter; a bypass overflow quantity is obtained through computation, and is compared with a maximum overflow quantity; a specific value is subjected to conversion into an integer between 0 and 2n-1 by the single chip microcomputer; the integer is transmitted into a code circuit to be converted into n-bit binary coding and used as a control signal of the multichannel solenoid directional valve; and a power amplification circuit enables the corresponding submodules to act, and the pressure or flow of the main oil circuit is regulated. According to the numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control, the pressure and flow of the main oil circuit are regulated by regulating the bypass overflow quantity through the on-off of different modules; and the numerical variable pump based on multichannel solenoid directional valve binary system flow regulation and control has the advantages that the pressure and flow fluctuation is low; the environment adaptability is strong; the dynamic property is good and the like.

Description

Technical field: [0001] The invention belongs to the application field of hydraulic system flow and pressure control, and in particular relates to a digital variable pump based on binary flow control of multi-channel electromagnetic reversing valves. Background technique: [0002] As the power source of the hydraulic system, the performance of the hydraulic pump directly affects the performance and efficiency of the hydraulic system. In order to improve the energy utilization efficiency and performance of the hydraulic system, most hydraulic systems currently use variable displacement pumps as the power source of the hydraulic system. At present, the hydraulic pump variable flow technology is mainly divided into two methods: variable speed and variable displacement. The hydraulic system composed of variable speed control method is still in the theoretical research stage due to reasons such as low stiffness, large vibration, poor response speed, and difficult tracking perform...

Claims

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Application Information

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IPC IPC(8): F15B21/02F15B13/02
CPCF15B13/02F15B21/02
Inventor 李小虎柳松玮张燕飞吕义发朱雷
Owner XI AN JIAOTONG UNIV
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