Internal feedback digital servo hydraulic cylinder

A digital servo and hydraulic cylinder technology, applied in the field of digital hydraulics, can solve problems such as high installation accuracy requirements, low-speed crawling, and difficult processing and manufacturing, and achieve the effects of high control accuracy, good stability, and simple structure

Active Publication Date: 2013-06-12
来宾市计量测试研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulties in processing and manufacturing of the internal mechanical feedback mechanism, high installation accuracy requirements, prone to failure and troublesome maintenance, etc., especially after the stroke of the oil cylinder increases, the above

Method used

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  • Internal feedback digital servo hydraulic cylinder
  • Internal feedback digital servo hydraulic cylinder
  • Internal feedback digital servo hydraulic cylinder

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing, technical scheme of the present invention is described further:

[0010] Such as figure 1 , figure 2 , image 3 shown

[0011] The internal feedback digital servo hydraulic cylinder consists of an oil circuit manifold 1, a vertical support plate 34 of the oil circuit manifold, a horizontal support plate 33 of the oil circuit manifold, a first motor 2, a second motor 18, a slide valve, a hydraulic cylinder, and hysteresis The telescopic displacement sensor 30, the first pipe joint 23, the first hollow screw 22, the second pipe joint 9, and the second hollow screw 10 are composed. The first motor 2 and the second motor 18 can be servo motors or stepping motors.

[0012] The hydraulic cylinder consists of a cylinder body 21, a piston 27, a piston rod 25, a piston rod nut 28, a cylinder head 24, and a cylinder bottom 31. A cylinder bottom 31 is provided at the right end of the cylinder body 21, and the cylinder bottom 31 ...

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PUM

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Abstract

The invention relates to an internal feedback digital servo hydraulic cylinder, which belongs to the field of digital hydraulic technology and aims to solve the problems of inaccurate control and difficulty in gain adjustment of an electrohydraulic servo system. The internal feedback digital servo hydraulic cylinder comprises motors, a slide valve, a hydraulic cylinder, a magnetostrictive displacement sensor, an oil path integrated block, a supporting plate and the like. A valve core of the slide valve is driven and controlled by a first motor; a feedback turnbuckle of the slide valve is driven and controlled by a second motor; a hydraulic cylinder displacement signal is fed back to a driver corresponding to the second motor by the magnetostrictive displacement sensor; the second motor is controlled to operate by the driver; and closed-loop digital control over the hydraulic cylinder displacement is realized by controlling relative motion of the feedback turnbuckle and the valve core. The internal feedback digital servo hydraulic cylinder has the advantages of simple structure, high control accuracy, small vibration and high stability, and is suitable for working places with long-stroke and large-thrust hydraulic cylinder.

Description

technical field [0001] The invention relates to an internal feedback digital servo hydraulic cylinder, which belongs to the technical field of digital hydraulics. Background technique [0002] The traditional electro-hydraulic servo control system and electro-hydraulic proportional control system are used to precisely control the displacement, speed, force and other physical quantities of the hydraulic system, but they cannot realize direct digital control, and need to use a digital / analog-analog / digital conversion device. Moreover, the electro-hydraulic servo system has high requirements on the cleanliness of the hydraulic oil, which limits its application range to a certain extent. Pulse hydraulic cylinders, digital cylinders, etc. are directly driven and controlled hydraulic valves by stepping motors or servo motors, and are equipped with hydraulic cylinders with mechanical feedback composed of internal ball screw structures, which can realize direct digital signal (pulse...

Claims

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Application Information

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IPC IPC(8): F15B15/08F15B15/20
Inventor 肖志权王军
Owner 来宾市计量测试研究所
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