Method for establishing mathematical model of gas dissolution theory of hobbing shear hydraulic system

A mathematical model and hydraulic system technology, applied in fluid pressure actuation system testing, special data processing applications, fluid pressure actuation devices, etc., can solve problems such as low space utilization and uncompact structure of rolling shear hydraulic system, etc. Achieve compact structure, improve space utilization and increase service life

Active Publication Date: 2020-08-07
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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Problems solved by technology

[0003] Aiming at the above-mentioned technical problems of uncompact structure and low space utilization rate of the rolling shear hydraulic system, the present invention provides a method for establishing a theoretical mathematical model of gas dissolution of the rolling shear hydraulic system with strong stability, high space utilization rate and long service life

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  • Method for establishing mathematical model of gas dissolution theory of hobbing shear hydraulic system
  • Method for establishing mathematical model of gas dissolution theory of hobbing shear hydraulic system
  • Method for establishing mathematical model of gas dissolution theory of hobbing shear hydraulic system

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Embodiment Construction

[0046] 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.

[0047] A method for establishing a theoretical mathematical model of gas dissolution in a rolling shear hydraulic system, such as figure 1 As shown, the following steps are included: Firstly, the bulk modulus expression is established

[0048]

[0049] According to the hydraulic system pressure p and hydraulic cylinder specifications required in the design task book, calculate the finite volume V of the hydraulic cylinder when it is pressurized y and hydra...

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Abstract

The invention belongs to the technical field of hydraulic system stability, and particularly relates to a method for establishing a mathematical model of a gas dissolution theory of a hobbing shear hydraulic system, which comprises the following steps of: performing calculating to obtain a volume elastic modulus E of hydraulic oil; obtaining the effective volume elastic modulus E of the hydraulicoil; a pressure rise rate and flow expression; obtaining the mathematical model of the pressure rise rate; obtaining the relationship between the variation of the gas and the solubility; obtaining therelational expression of the gas variation; and obtaining the mathematical model s of the gas dissolving distance. According to the method, the mathematical model of the initial gas content and the gas movement distance after valve port cavitation is established; the optimal distance of gradual dissolution of the gas cavitated through the valve port in hydraulic oil is analyzed through the mathematical model, the optimal duct distance from the valve port to the hydraulic cylinder is designed according to the distance, a theoretical basis is provided for solving the problems of cavitation andseal ring damage in the hydraulic cylinder, and the stability of a hydraulic system is improved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic system stability, and in particular relates to a method for establishing a theoretical mathematical model of gas dissolution in a rolling shear hydraulic system. Background technique [0002] Hydraulic systems have been widely used in mining machinery, metallurgical machinery, aerospace, high-speed trains, heavy industry and construction machinery, and have become an indispensable part. With the continuous development of science and technology, there are higher requirements for the stability, vibration, and control precision of the hydraulic system. For the rolling shear hydraulic system, the method of directly installing the servo valve on the oil cylinder is insufficient. There is no theoretical support for the distance between the valve and the hydraulic cylinder. The distance is too small to allow the gas after cavitation to enter the hydraulic cylinder. Cavitation in the hydraulic cylinder...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20F15B19/00
CPCG06F30/20F15B19/007
Inventor 韩贺永秦丽霞王晶李永祥张维龙刘轩
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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