The books includes all the necessary information selection and application of the all ranges of centrifugal, rotary, positive displacement pumps and boiler feed water pumps. In order to meet the special needs of transporting various gases, there are now many different types of vacuum pumps on the market. A pair of gears with many teeth external to the gear and called an external gear pump in gear pumps or a few lobes in lobe pumps is demonstrated in fig. These types of pumps are most commonly used worldwide. Airoperated and mechanical as the name suggested, airoperated diaphragm pumps aka aod pumps or aodd pumps are powered solely by air making them suitable for dangerous and tough environments. Review different pump types commonly used understand the difference between centrifugal pumps and positive displacement pumps.
The water enters through the suction pipe and it is trapped between cams or teeth of gears and casing. Types of rotary pumps include camandpiston, internalgear, lobular, screw, and vane pumps. As the rotor orbits, the vanes trap fluid between the rotor and the casing, drawing the fluid through the pump. Rotary pump family tree positive displacement pd pumps are divided into two broad classifications, reciprocating and rotary figure 1. Pumping rates can vary from a few gallons to a millionday 392012 4.
For more experienced users, it will provide a timely update on the recent trends and developments, including actual field operation. Rotary and reciprocating pump types yes yen graphitech. Centrifugal pumps the centrifugal pump produces a head and a flow by increasing the velocity of the liquid through the machine with the help of a rotating vane impeller. Classification of the rotary pumps is generally based on the types of rotating element. Centrifugal and rotary pumps fundamentals with applications by lev nelik. Vacuum pumps common types and applications vacuum pump. Pumps operate by some mechanism typically reciprocating or rotary, and consume. Generally, these are classified into three types which are discussed in detail below.
A stationary component comprised of a casing, casing cover, and bearings. Pumping element designs include gears, lobes, rotary pistons, vanes, and screws. A classification system for the seal configurations covered by iso 21049. There are different vacuum pumps are available, and the common function of these pumps are nothing but removing air, vapor, or gases from a closed device. Mechanical engineering types and performance of pumps and compressors essam e.
Hyster challenger h40j, h50j, h60js service manual pdf. In the previous article we learned about the various characteristics, main parts and special features of the rotary pumps. A rotary vane pump is a positivedisplacement pump that consists of vanes mounted to a rotor that rotates inside of a cavity. Pump guidebooks are available in hardcopy or secure pdf format. Rotary pump standard secure pdf hydraulic institute. We will also learn how is the working of screw pump different from that of other types of pumps. Gary dyson is head of product development aftermarket, with union pumpcompany,inbattlecreek,michigan. Rotary pumps are used in the chemical and petroleumrefining industries. All types of rotary pumps continue to force liquid into the system regardless of the opposition to the transfer. Classification of rotary pumps pump fluid dynamics scribd. The operation at higher speeds causes erosion and excessive wear which result in increased clearances with a subsequent decrease in pumping capacity.
Pump school currently focuses on rotary pumping principles. General components of centrifugal pumps a centrifugal pump has two main components. Rotary vane pump a hydraulic pump that uses a series of flat protrusions that rotate to trap and move liquid through a hydraulic system. Figure 12 reciprocating positive displacement pump operation. Rotary pump in rotary pumps, the chamber moves from inlet to discharge and back to the inlet. Select from a number of titles covering a multitude of various topics such as optimizing pumping systems, mechanical seals, wastewater treatment plant pumps, reliability of pumping equipment, variable frequency drives, power plant pumps, and pump life cycle costs. The standard addresses seven basic types of rotary pumps.
Gear pumps are the simplest type, consisting of two gears laid out sidebyside with their teeth enmeshed. For more detailed information about the rotary pumping principles, see the specific pumping principles under pump schools pumping principles page. Rotary pumps basic considerations in their applications in application of rotary pumps there are certan factors whigh must be considered in order to insure a successful installation. Diaphragm pumps require inlet valves and outlet valves 6 to achieve gas. The space between the head cover and the diaphragm forms the suction chamber 5. Positive displacement rotary pumps can be grouped into three main types. Centrifugal pumps develop pressure by increasing the velocity of the liquid liquid is literally flung out of the cutwater. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. A free powerpoint ppt presentation displayed as a flash slide show on id. Yet there is not one pump ideally suited for every application. Rotary pumps nomenclature, definitions, application, and operation ansihi 3. Selection of a positive displacement pd rotary pump is not always an easy choice. Rotary pump article about rotary pump by the free dictionary. Ppt types of vacuum pump powerpoint presentation free.
There are two cams or gears which fit with each other. A rotary vane vacuum pump is an oilsealed rotary displacement pump. The following information is taken from hydraulic institutes, pump types and nomenclature, 1994. Atlas copco working principle of the new gvs a rotary vane vacuum pump duration. By definition, pd pumps displace a known quantity of liquid with each revolution of the. Centrifugal pumps are the most common type of pumps found in doe facilities. Rotary pumps selecting between the two types of pumps behave very differently regarding pressure head and types and performance of pumps and compressors 3 types of pumps pumps positive displacement kinetic reciprocating piston rotary vane gear screw blow case centrifugal regenerative turbine special effect.
Liquid ring vacuum pumps are used for medium to heavy steam load conditions. They can be classified according to their basic operating principle as dynamic or displacement pumps. The pumping system consists of a housing 1, an eccentrically installed rotor 2, vanes that move radially under spring force 3 and the inlet andoutlet 4. Vacuum pumps are used in a variety of process equipment and to pump air, water vapor, organic and inorganic solvents and acids. A partial vacuum is created at the suction side which draws the liquid into the casing and higher pressure is developed at the discharge side that forces the liquid out. By definition, positivedisplacement pd pumps displace a known quantity of liquid with each revolution of the pumping elements.
Gear pumps a simple type of rotary pump where the liquid is pushed between two gears. In rotary pumps the liquid is displaced by rotation of one or more multiple rotors within a housing that is stationary. Understand the difference between centrifugal pumps and positive displacement pumps. A pump is a device that moves fluids liquids or gases, or sometimes slurries, by mechanical action, typically converted from electrical energy into hydraulic energy. Most pd pumps can be adapted to handle a wide range of applications, but some types are better suited than others for a given set of circumstances.
Dynamic pumps can be subclassified as centrifugal and special effect pumps. Rotary pumps are designed to operate at relatively low speeds to maintain these clearances. They are one of the most common types of pumps for hydraulic. Rotary pumps are selfpriming and deliver a constant, smooth flow, regardless of pressure variations. Pumps can be classified into three major groups according to the method they use to move the fluid. In this article we will learn about the working of various types of rotary pumps, i. Overview of types of rotary positive displacement pumps. Mechanical pumps in mechanical pumps, the gas present in a vacuum system is transferred from a low pressure to a. Khalil encyclopedia of life support systems eolss 1. Pumps pumps are machines that are used to move liquids from one place to another through pipelines.
Providing innovative producttransfer solutions for a variety of markets and applications. Gear pumps are found in home heating systems in which the burners are fired by oil. Gear pumps are the simplest type of rotary pumps, consisting of two gears laid out side. Displacement pumps can be subclassified as rotary or reciprocating pumps. Rotary positive displacement pump can be classified into two main types. This section of pump books has been produced to train pump users technicians and engineers at all levels, these handbooks will provide a great reference tool. There are many different types of vacuum pumps on the market today that meet special needs in pumping various gases. Classification of rotary pumps free download as word doc. A rotating component comprised of an impeller and a shaft ii. Internal gear pumps use a gear within a gear design. In some cases these vanes can be variable length andor tensioned to maintain contact with the walls as the pump rotates types the simplest vane pump is a circular rotor rotating inside of a larger circular cavity. Centrifugal and rotary pumps fundamentals with applications. Pumps make possible many everyday tasks that we often take for granted. This is done by trapping liquid between the pumping elements and a stationary casing.
They are also used for chemical transfer, dewatering underground coal mines, food manufacturing or where the liquid being pumped has a high solids. Wide variety of types and styles of pd pumps all operate on the principle of filling, trapping, transporting, and forcing out. The general components, both stationary and rotary, are depicted in figure b. Due to this reason, additional protection to these pumps is required or else the pump will continue to build pressure and finally lead to rupture or damage to the pump. Rotary vane pumps similar to scroll compressors, these pump have a cylindrical rotor encased in a similar shaped housing. A wide variety of rotary pumps are available like gear pumps, lobe pumps, screw pumps, cam pumps, vane pumps. In this type of pump, the reciprocating motion is substituted by the rotary motion. Positive displacement pumps allow liquid to flow into an open cavity trap the liquid in the pump transport liquid from the suction to discharge port mechanically force liquid out of the pump.
Vacuum pumps are used in a variety of process plants to pump air, water vapor, organic and inorganic solvents and acids. Rotary pumps use a variety of means to generate flow. Indeed without pumps our world would be a much different place than we know it today. Gear pumps a simple type of rotary pump where the liquid is. For new engineers, mechanics, operators, and plant management, this book will provide a clear and simple understanding of pump types, as defined by the hydraulic institute hi.
A rotary pump is a type of pump that is capable of pumping more liquid than reciprocating pumps with the same weight. The most common types of rotary pump in the ussr are doublecam pumps, which deliver 6160 m 3 hr at a delivery pressure of up to 0. Piston and progressing cavity pumps have rotary forms. Pumps that experience such erosion eventually show signs of enlarged clearances, which allow liquid to slip through and detract from the efficiency of the pump. Centrifugal pumps enjoy widespread application partly due to their ability to operate over a wide range of flow rates and pump heads. These are fundamentally the same regardless of the fluids to be handled or the pumping conditions. Dynamic pumps are classified into different types but some of them are discussed below like centrifugal, vertical centrifugal, horizontal centrifugal, submersible, and fire hydrant systems. Rotary pump types and nomenclature, definitions, illustrated pump diagrams, pump classifications and preferred units for applications, design and application considerations such as temperature, viscosity, inlet pressure and other parameters, slurry effects, rotary pump noise, installation guide, operations and maintenance with table on solving pump malfunctions. Vane pumps are efficient at high speeds of operation. The pump requires a relief valve for protecting the piping system and the pump because of its positive displacement.
134 459 1509 963 3 49 355 1633 1393 986 366 116 1334 1527 1246 364 382 291 329 771 138 432 1446 444 1458 1600 138 1386 1143 615 1421 1498 356 987 441 330 1242