機(jī)械設(shè)計(jì)外文翻譯--氣動(dòng)馬達(dá)及工具-機(jī)械設(shè)計(jì)-在線瀏覽
2024-07-23 23:41本頁面
【正文】 置的前卸式裝載機(jī)使用得最為廣泛。多斗裝載機(jī)適于磚廠、混泥土預(yù)制品廠及裝卸量大的火車站，也同樣適用于裝載松散5 物料。 用多斗裝載機(jī)為側(cè)邊卸料的平板車卸料，其效率很高。在筑路中，用于將砂子和礫石裝入烘干筒和攪拌機(jī)里。當(dāng)給料器旋轉(zhuǎn)時(shí)，物料被送入各個(gè)鏟斗內(nèi)，使得裝料比較容易。多斗裝載機(jī)的提升機(jī)把物料卸在傳送帶上，再由傳送帶將物料運(yùn)送到設(shè)備中。 Pneumatic Motors and Tools Compressde air can be used for a wide variety of operations,such as:to drive air motors and air hammers,to operate air cylinders,to atomize liquids,to convery materials,to displace and agitate liquids,to serve as a cushion,to create a vacuum,to accelerate bustion,and to serve as a coolant and lubricant. An electric motor is a device in which electrical energy is converted into mechanical fluid motor is a device for converting fulid energy into mechanical this chapter,the main features of pneumatic motors and pneumatic tools are discussed. GENERAL TYPES OF AIR MOTORS Air motors may be divided into tow general type: (1) the rotary type and (2) the reciprocating type. The bination of a piston and cylinder is an example of the reciprocating type of example of the rotary motor are the vanetype and geartype motors. A rotary vanetype motor is rotating member,with its sliding vanes,it is trapped between the vane(which ride on the inside of the housing)and pushes to the the pressed air drives a rotating member. A geartype motor is pair of meshed gears rotate inside 6 a housing,As the gears rotate,the air is trapped between the gear teeth and housing,and pushes from the inlet to the the pressed air drives the gears. CHARACTERISTICS OF AIR MOTORS An air motor operates safely in an explosive atmosphere,and has a low installation cost,a rapid acceleration,and a high starting is pact,and its cariable speed can be changed. A typical curve for torque versus speed(rpm)for a rotarytype air motor is speed can be caried,in small steps,from zero a maximum by varying the air flow to the air flow rate to the motor can be varied by means of a valve in the inlet pressedair pressure at the air motor inlet can be contolled with an adjustable pressure regulator in the air inlet line。the motor can withstand repeated stalling and reversing without damage or air motor can accelerate(or speed up)rapidly,because the pressed air energy can be released at a high rate. Air motors are available mercially in sizes ranging from 1/10 7 horsepower to 50 horsepower,and in speed ranging from 20 rmp to 75,000 rmp. GENERAL FEATURES OF PNEUMATIC TOOLS Pneumatic tools represent a large number of airoperated machines that are usually transported to a work area,rather than transporting the work to the tool(as in machining some metals by machine tools).In many instances,the tool is either held entirely by the hands or guided and controlled by tool may be a manufacturing plant,the an outdoor construction job,the pressor may be a manufacturing plant,the pressor may be from the pressor system is fed by means of distribution piping through a filter,a pressure regulator,and a from the lubricator may be fed through a flexible hose to the pneumatic tools are usually supplied with pressed air at about 90 pounds per square inch, are three hroad classifications of pneumatic tools(1)rotary,(2)piston,and(3)percussion. In a typical rotary pneumatic tool,the air enters the tool handle,passes through a manually operated control valve,passes through the end plates,and enters a chamber of a vanetype air air pushes the rotor form the inlet to the the outlet,the air is discharged into the typical rotary air motor possesses three to five blades,rotates at speeds of 4000 t
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