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Symmetric digital hydraulic cylinder

A digital hydraulic, symmetrical technology, applied in the field of servo systems, can solve the problems of bearing reliability and life, accuracy decline, accelerated seal failure, etc., to achieve the effect of convenient installation and testing, reduce life impact, and eliminate pressure jumps

Active Publication Date: 2020-04-21
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This phenomenon will accelerate the failure of the seal, damage the internal connecting parts, bearings and other parts, and affect the reliability and life. In particular, the ball screw will increase the wear and tear in the vibration and shock environment, resulting in a decrease in accuracy or even failure.

Method used

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] The embodiment of the present invention discloses a symmetrical digital hydraulic cylinder, including: a driving mechanism, a slide valve, a feedback mechanism, a double-outlet piston rod, a hydraulic pipeline, and a cylinder barrel. The slide valve includes: a valve body 5 and a valve core 4, The valve core 4 is arranged inside the valve body 5 and one end protrudes from the valve body 5 to connect with the output end of the drive mechanism; the feedbac...

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Abstract

The invention discloses a symmetric digital hydraulic cylinder. The symmetric digital hydraulic cylinder comprises a driving mechanism, a slide valve, a feedback mechanism, a double-outlet-rod pistonrod, a hydraulic pipeline and a cylinder barrel. According to the symmetric digital hydraulic cylinder, a symmetric valve is used for controlling a double-outlet-rod symmetric hydraulic cylinder, so that characteristics of a piston rod are consistent during bidirectional movement, the pressure jump during reversing is eliminated, and the influence of vibration and impact on the positioning precision and the life of a digital hydraulic cylinder system is reduced.

Description

technical field [0001] The invention relates to the technical field of servo systems, in particular to a symmetrical digital hydraulic cylinder. Background technique [0002] Digital hydraulic cylinder, also known as stepping hydraulic cylinder, refers to the combination of stepper or servo motor, hydraulic slide valve, and mechanical feedback of piston rod position inside the hydraulic cylinder, and the hydraulic oil source is connected. All functions are directly controlled by the digital hydraulic cylinder. It is a high-tech product that completes the position or speed control of the piston rod by the digital pulse signal sent by the controller or computer or programmable logic controller. [0003] However, in actual engineering, in order to save space, asymmetric digital hydraulic cylinders are usually used. For asymmetric digital hydraulic cylinders, when the piston rod is extended, the pressure oil communicates with the rodless chamber through the throttle window, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/14F15B15/20F15B15/22F15B13/02
CPCF15B13/021F15B15/1404F15B15/1423F15B15/1428F15B15/1452F15B15/1457F15B15/149F15B15/202F15B15/224
Inventor 裴忠才刘红麟唐志勇裴培
Owner BEIHANG UNIV
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