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1、英文原文Hydraulic fluid control valve and method20th century drive and control technologies gradually mature age. With the rapid development of modern science and technology, it not only acts as a transmission mode, and can be used as a control, as the connection of modern microelectronics and power con
2、trol of a bridge between the object and become indispensable to modern control engineering important technical means. Energy conversion, power transmission and motion control in the 21st century is still an important part of the global economy, fluid transmission and control technology still is one
3、of the most important and active role in.Hydraulic fluid control valve within the fluid flow through the implementation of components to achieve the control action is based on stream flow in the valve function of the kinematic and dynamic rules-based, so it should be in-depth study of fluid flow val
4、ve position and fluid and valve dynamics of solid links between the components, to improve valve performance. In recent years, as computer technology and the development of computational fluid dynamics theory, application CFD method, the hydraulic valve flow field within the simulation and visualiza
5、tion analysis, a new hydraulic technology, the research focus, research the structure of the valve Parametric design and optimization of flow meter has no practical significance. When the flow of hydraulic valve flows through the valve chamber and valve port, due to changes in flow rate, there will
6、be fluid dynamic action on the spool. Hydraulic control valve control valve capacity must be able to overcome the numerous obstacles, which includes the inertial force, friction and spring force and fluid force, among which the largest proportion of fluid power. Fluid power control valves will not o
7、nly affect the power, but also may lead to self-excited vibration of the valve and affect the system stability and reliability, it is the design, analysis, hydraulic control valves and hydraulic system, an important factor. Using a variety of flow field calculation method, the valve on flow field nu
8、merical calculations to accurately calculate the fluid power valve hydraulic power in recent years a hot research topic, which can be used to improve flow through the valve structure, for valve The fluid dynamics provide the theoretical basis of compensation.Throttle valve is mainly used for oil dri
9、lling, oil field testing, cementing and other high-pressure pipe by adjusting the throttle valve stem to change the orifice size to meet pipeline pressure and flow regulation purposes. Therefore, its performance will affect the oil throttle operation when the safety and efficiency. Research on high
10、pressure throttle valve failure analysis, pointed out the various failure modes of one-way throttle valve, and with the CAD / CAE technologies, in particular, computational fluid dynamics technology, on the throttle Numerical simulation of the flow field into the current throttle important means to
11、optimize the design.At present, the hydraulic system and component design, analysis method is based on a semi-empirical method, multi-simplified by some theoretical formula has been difficult to explain and deal with certain practical problems, the development of the throttle and in-depth research,
12、there are many problem. In theory, many factors inside and outside of none of them consider many factors in the continued influence of hydraulic control components, researchers are constantly plagued the theory of hydraulic control components analysis and research. For example, the pressure on the t
13、hrottle the flow of temperature on the flow of the throttle, the throttle orifice of the plug, throttle valve throttle hole phenomenon and the throttle valve fistula oil phenomena and improvement of the internal structure of the throttle problem.Therefore, the advanced science and technology issues
14、of these technologies were studied and overcome. With the rapid development of computer science and technology, the researchers gradually developed a series of fluid analysis software, application CFD method, using Fluent CFD software and the ANSYS finite element analysis software, the structure of
15、the one-way throttle valve for the stress and pressure flow simulation of all aspects of the operation of hydraulic components in fact carried out a precise calculation and analysis, to master a number of hydraulic components of the running simulation and optimization of design and construction and
16、improvement of information. Therefore, various more advanced, more energy efficient and more optimal hydraulic control components industry one after another, to the modern industrial development provides better power.With the high-pressure, high-speed, high-volume and high-efficiency hydraulic system development, energy conservation, low noise and environmental protection research also increasing throttle, not only on the throttle for all aspects of technical improvements, but al
