有没有关与液压的英文文章

valanie

1.2.2.2        Selection and application of air motors
(1)Air motors’ selection: The selection of air motors is mainly base on its loaded conditions. In variable load occasions, the speed range and the torque needed to meet working conditions are principally considered. Working speed is also an important factor for constant load occasions. Other factors must be considered except for the above performance-related factors, such as working pressure, gas consumption installation type, etc.
(2)Air motors’ application: Air motors find more and more applications as the developing of the productivity. They can be used in all walks of life, particularly applicable for the occasions which require safety-needed, stepless speed changing, frequent direction changing for startup, resistant exploding, and load startup and that easy to be overloaded. They are equally suitable the harsh environment with moisture, high temperature, vibration or that inconvenient to operate directly, such as mine, car manufacturing.
(3)Air motors’ lubricating: The working medium of air cannot provide lubrication itself, so additional lubricants are needed in air motors. Proper used and nice lubricating will extend air motors’ use life, with the second repair time of 2500 - 3000h or longer. The common way to lubricate is to set an oil mist lubricator before the control valve in the air motor and supply oil in time; the lubricant will enter the system with the compressed air to accomplish lubricating purposed.

valanie

1.3                Pneumatic control elements
An important item in a compressed air layout is a regulating valve which ensures the desired pressure, flow rate and direction in the system. The first important function of these valves is for safety; the second function is to provide for a part of the system to operate at a lower pressure than the main supply. There are various types of regulating valves; generally they can be divided into three main categories defined by the functions they perform: pressure control, flow control and directional control
The pneumatic fixed value switching regulating valves are similar to hydraulic regulating valves; there are also pneumatic proportional regulating valves and pneumatic servo-control valves. The recently-developed valve terminal has the advantages of concise construction, easy to install and maintain, high degree of modularization, and can achieve centralized control in medium or small pneumatic systems.

valanie

1.4                Pneumatic attachments
1.4.1        Mufflers
Unlike hydraulic circuits, there are no return pipelines in pneumatic circuits. The compressed air exhausts to the atmospheric directly after having been used. The air will sharply expend due to high pressure difference and produce serious exhausting noise. Usually a muffler is set at the discharge port to reduce the velocity and power of the jet noise by means of damp or increasing exhausting area.
Three types of muffler are available: absorptive mufflers, expansive mufflers, expansive and absorptive mufflers. This is an absorptive muffler structure. The muffler body is made of multi-hole absorptive material, sintered by copper or polystyrene bean. Today absorptive mufflers are also most wildly used.
1.4.2        Pipeline connectors
Pipeline connectors incorporate tubes and pipe fittings. There are rigid tubes and hose tubes. Pipe couplings include bite type tube fittings, flared type tube fittings, corpling of borsing and quick release fittings.

valanie

气压传动部分的 文章希望你能用得到

qml

希望楼上的兄弟