Lobe contact is prevented by external timing gears located in the gearbox. A general seal selection guide is included, together with various operating parameters. The inner rotor has one teeth lesser than the outer rotor. These pumps basically rotating within body without contact each other three or two rotor consists of lobe. Selection of a positive displacement pd rotary pump is not always an easy choice. Pump shaft support bearings are located in the gearbox, and since the bearings are out of the pumped liquid, pressure is limited by bearing location and shaft deflection. Whenever the pump is in action, then the fluid pressure will increase from the inlet of the pump to its outlet. Both lobes rotate in synchronism without one touching the other. They are popular in these diverse industries because they offer superb sanitary qualities, high efficiency, reliability, corrosion resistance, and good cleaninplace. Finally, the meshing of the lobes forces liquid through the outlet port under p. Lobe pump overview lobe pumps are used in a variety of industries including, pulp and paper, chemical, food, beverage, pharmaceutical, and biotechnology. Working principle the positive displacement of the sru pump is provided by noncontacting, co ntra rotating trilobe or bilobe rotors within a fully swept pump chamber. Today we will study the complete overview of reciprocating pump.
Classification of pumps types of pumps and their working. Different types of lobes are offered depending upon the application. The vx series the versatile rotary lobe pump from vogelsang. As the lobes come out of mesh, they create expanding volume on the inlet side of the pump. Liquid flows into the cavity and is trapped by the lobes as they rotate. The manufacturer can tell you which certifications, if any, their rotary lobe pump meets.
The capacity of material being pumped can be changed by varying speed of the pump. Currently comprised of five models, more than 25 different sizes, a wide variety of drive variants, and a comprehensive range of features and options, the rotary lobe pumps in. Pump sealing this section covers the shaft sealing devices used on alfa laval centrifugal, liquid ring and rotary lobe pumps. Rotary lobe pumps work especially well with highly viscous liquids, delivering a continuous output of flow. This style of pump is designed for standard duty applications. A lobe pump, or rotary lobe pump, is a type of positive displacement pump. Steep 1 speed working from the flow axis at 50 lpm dotted a line horizontally across to intersect the dotted 3 bar, between the 2 bar and 4 bar flowspeed performance lines. The lobe pump is a positive displacement rotary pump.
Each with its distinct place in the market, this range of hygienic pumps can be used across the sanitary market from food to high end pharmaceuticals plus many. Standard lobe pumps in aisi 316 stainless steel are assembled on a cast iron gear box. User manual pomac plp lobe pump ceplp 1406 en12 7 3. Currently comprised of five models, more than 25 different sizes, a wide variety of drive variants, and a comprehensive range of features and options, the rotary lobe pumps in the vx series are unbeatable. Jul 24, 2018 welcome to our channel, sampurna engineering.
This pump is strong, efficient and fairly cheap to make. It has two meshed gears revolving about their respective axes. The lobes rotate, moving fluid trapped in the cavities between lobe tips. Types of gear pump internal, external,gerotor, lobe pump gear pumps gear pump is a robust and simple positive displacement pump.
The type number describes the setup of the pump and is composed as follows. Rotary lobe pumps are similar to the external gear pump. Lobe pumps rotate clockwise when observed from coupling side. Consider a case when everest twin lobe rotary air blower is selected for an application requiring a capacity of q m3hr at h mm of wg at which the power is specified as p kw. If the rotors are made of metal the desired undersize prevents complete sealing. Sep 08, 2017 as the lobes come out of mesh, they create expanding volume on the inlet side of the pump. The grabcad library offers millions of free cad designs, cad files, and 3d models. The lobes mesh, forcing fluid contained in the lobe cavities into the discharge nozzle of the pump. The working is very simple, described well and carefully tested. For larger sizes or high working pressures there are other. They are popular in these diverse industries because they offer superb sanitary qualities, high efficiency, reliability, corrosion resistance, and good cleaninplace and sterilizeinplace.
Lobestar pump model numbers correspond to the volume pumped per 100 revolutions. Pump sizing how to size an alfa laval pump from productfluid and. The rotary pump mechanisms consisting of a casing with closely fitted cams, lobes, or vanes, that provide a means for conveying a fluid. An internal lobe pump unit consists of an inner and outer rotor. Vane, gear, and lobe pumps are positive displacement rotary pumps. Installation and operation of the pump must always comply with health and safety. The roots type supercharger or roots blower is a positive displacement lobe pump. The pumping action of the rotary lobe pump principle is generated by the counter rotation of two pumping elements rotors within a chamber. The working of all these pumps are based on the same principle, i.
Operating principle borger rotary lobe pumps are selfpriming, valveless, positive displacement pumps. Pump identification each pump has a unique serial number and a type number. Rotary lobe pumps for example, 50 lpm, 1 cp against a differential pressure of 3 bar, using a zl220 lobe pump. In addition to shaft seals, other proprietary seals not detailed in this section, such as o rings and lip seals can be found on the pumphead and gearcase. They operate in the same fashion, except that the rotary lobe uses lobes instead of gears to move fluid through the pump. A centrifugal pump will cavitate in these cases, but a positive displacement pump will continue to build pressure until something. The modules listed in the overview are linked to the corresponding pages. This portable document format \ pdf \ file contains bookmarks, thumbnails, and hyperlinks to help you navigate through the document. Contents 2 sru1 universal pump parts list 3 sru1 universal pump exploded view drawing 4 sru2 universal pump parts list 5 sru2 universal pump exploded view drawing 6 sru3 universal pump parts list. Model maximum capacity maximum capacity per 100 revolutions maximum working.
Operating manual sru rotary lobe pump oliver m dean inc. We create lecture videos for the various subjects and software of mechanical engineering. Low speed operation reduces abrasive wear and better handles higher solids concentrations above 3%. Circumferential piston wright flow technologies proudly introduces to its circumferential piston range of pumps its new revolution pump in circumferential piston modality. Reciprocating pump is a positive displacement type pump. Due to fristam pumps commitment to continuous improvement, speci. See the illustration at right for an example of how a lobestar positive displacement rotary lobe pump operates. Pumps can be classified into three major groups according to the method they use to move the fluid. Moved to pump outlet the fluid between the rotor and the inner wall of the pump.
This direction is demonstrated with an arrow label placed on pump. Lobe pumps are similar to external gear pumps in operation in that fluid flows around the interior of the casing. Mar 01, 2000 lobe contact is prevented by external timing gears located in the gearbox. The new revolution along with the tra10 and tra20 offer a reliable positive displacement circumferential piston pumping principle that has been proven over many decades. By running for a very short period, pump rotation direction should be checked for following direction of the arrow. The b100 and b330 models can be manufactured in mixed versions, i. This manual contains information about the reception, installation, operation, assembly, disassembly and maintenance of the lobe pump tls. Tushacos rt and rtbp series uses a trochoidal inner rotor and an outer rotor formed by a circle with intersecting circular arcs. Pump inlet as the rotor rotates the volume increases on the line. For instance, the rm100 can pump 100 gpm per 100 revolutions or 1 gallon per rpm.
When the pump is running they displace a set volume of liquid. Lobe pumps contains two elastomercoated rotors that are driven by an integral gear box and synchronized by timing gears. Rotary lobes use the movement of two lobes in a pumping chamber to accomplish the pumping action. The lower lobe is located on the driven shaft, and is driven via a helical gear.
Rotary lobe pumps belong to the group of rotating positive displacement pumps. Operating principle rotary lobe pumps boerger america. Their popularity stems from a number of attractive properties like high efficiency, reliability, solids handling ability, and cip and sanitary qualities. Join the grabcad community today to gain access and download. They are popular in these diverse industries because they offer superb sanitary qualities, high efficiency, reliability, corrosion resistance, and. How lobe pumps work lobe pumps are similar to external gear pumps in operation in that fluid flows around the interior of the casing.
Large fluid cavities can pump liquids with large solids no crosscontamination of lubricating oil into product zone due to unique gear case design pumps are energy efficient and easily cleaned, maintained and repaired. Fluid enters from the suction nozzle of the pump and begins filling the lobe cavities. May 11, 2012 here is video of a roots blower with twolobed rotors. Unlike external gear pumps, however, the lobes do not make contact. During the installation procedure, all the electrical work must be carried out by duly authorised personnel.
The rotation of the rotors causes negative pressure on the suction side drawing the media in and transferring it along the housing walls to the pressure side. These types of pumps are most commonly used worldwide. What is the working principle of rotary lobe pumps, and in. Working of gear, vane or lobe pump though the construction, shape and design of gear, vane and globe pumps are a bit different, they fall under the same category of rotary pumps. Most pd pumps can be adapted to handle a wide range of applications, but some types are better suited than. Lobe pumps are similar to external gear pumps in operation in that fluid flows around the. The pumping action of the rotary lobe pump principle is generated by the counter rotation of two pumping elements rotors within a chamber rotor case. Pdf this study develops a new lobe pump rotor profile that significantly. For instance, the m100 can pump 100 gpm per 100 revolutions or 1 gallon per rpm. At the bottom of this article you will find the pdf downloadable link and continue your learning offline.
Alfa laval birch road, eastbourne, east sussex bn23 6pq tel no. When wet, rotary lobe pumps have selfpriming capabilities. A pump is a device that moves fluids liquids or gases, or sometimes slurries, by mechanical action. Rotary lobe pumps work by fluid flowing around interior of the casing, and these pumps can run dry or wet. The rotors are located on shafts, which in turn are mounted within an external gearbox and supported by bearings.
For paints, dyes, food and the like, rotary lobe pumps are ideal. An early example of a lobe pump is the roots blower, patented in 1860. Rotary lobe pumps best price rotary lobe pumps bph pumps. Over pressured lip seal when a rotary lobe pump or any positive displacement pump are operating against plugged discharge lines or closed valves, pressure builds in the line.
Types of gear pump internal, external,gerotor, lobe pump. Alfa laval sx rotary lobe pump premium multi lobe sx pump meets the highest standards in the food, beverage and dairy industries. Maintenance and service manual lobe pump b sivag pumpen. Dynamic pumps impart velocity and pressure to the fluid as it moves past or through the pump impeller and, subsequently, convert some of that velocity into. Omac can product lobe pumps for transferring all kinds of aggressive products.
Here is video of a roots blower with twolobed rotors. Spare parts sru rotary lobe pump harco enterprises. Alfa laval sru rotary lobe pumps are carefully engineered to provide reliable performance, troublefree operation and superior energy efficiency for demanding applications. As pressure is added, the output is reduced because of slip. The sx pump is a positive displacement rotary lobe pump. Originally developed for the biotech and pharmaceutical industry it is the best choice for maintaining the integrity of delicate products. They are compact, relatively inexpensive and have few moving parts.
Please reach out for more information on spx flows products and. It is an excellent choice for duties that require contaminationproof pumps to meet high standards of. It is similar to a gear pump except the lobes are designed to almost meet, rather than touch and turn each other. Text headings in each module are linked to and f\ rom the table of contents for that module. Pumps operate by some mechanism typically reciprocating or rotary, and consume energy to perform mechanical work moving the fluid. Elastomer rotors seal the pump off when the pump comes to a halt. Spare parts sru rotary lobe pump sp70772gb3 200002. The inner rotor is eccentric to the outer and is fitted to a shaft located by bearings in the pump covers. Generally pumps classification done on the basis of its mechanical configuration and their working principle. Alfa laval sx rotary lobe pump premium multilobe sx pump meets the highest standards in the food, beverage and dairy industries. Unit 571 new smyrna beach, fl 32128 386882ezce3923. Thanks to their compact design, high performance density and operational safety they are often used to continuously and gently convey and dose in proportion to speed difficult media.
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