Our internal gear pumps are characterised by extremely low noise levels, low pulsation and a very large speed range. They typically consist of a northern heavy duty gear pump, electric motor, shaft coupling, and coupling guard, mounted on a unit base. The useful viscosity range of an internal gear pump is from 1cps to over 1,000,000cp. An internal gear pump works on a similar principle except the two linking gears sizes are different with one revolving within the other. 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.
It may be calculated from the physical dimensions of the gears, or it. These pumps can handle small suspended particulate in abrasive applications, but. Pdf a variable flow internal gear pump is a fixed displacement unit where timing can be varied with respect to the gearing to reduce the net outgoing. Features include a small footprint, plus drives that are stackable. Figure 1 shows a crosssectional view taken through the gears of a typical gear pump. Get info of suppliers, manufacturers, exporters, traders of internal gear pump for buying in india. Internal gear pump eips2 type eips2 with constant displacement volume technical data. Parker hannifin corporation gear pump division kings mountain, north carolina usa 2 failure or improper selection or improper use of the products andor systems described herein or related items can cause death. A drive using gear wheels, belts or chains without an adapter bearing is possible only to a limited extent and always requires approval from hydac. The qx pumps are the 5th generation of bucher internal gear pumps, which have proven. Indeed, why test anything else when you can just take the pump to local hydraulics dealers and get their professional opinion after about a year of working in a shop i knew for sure how to evaluate a gear pump just by looking at its parts. This is an animation video on the working of an internal gear. We frequently build and assemble pump unit assemblies, or skids as they are sometimes called.
They function through the use of two or more internal gears that create vacuum pressure, propelling the fluid media. Precise by design, they deliver accurate and repeatable performance, a smooth flow and a pressure up to 18 bar 260 psi. The usual story is the machine has lost pressure and, of course, the gear pump is the primary suspect. The gears themselves are lubricated by the fluid, which is of a lubricating nature. For example, in a pump design, the number of gear teeth in the inner and outer gears is 10 and 11, respectively.
The rotating gears develop a liquid seal with the pump casing and create suction at the pump inlet. The design of the internal gear pumps, series qxeh, is completely focused on high customer benefits. Section 4 reports the simulation results and campares them with those in 7. Hydraulic gear pump and motor failure analysis and repair. Market gear pump 0 group motor reference lab e bfback inlet and front out. The internal gear pumps are available in various sizes and pressure levels from 3. The pump is so named because it has two gears that are sidebyside or externalto each other.
Internal gear pumps iph ipc ipvs ipvp ipva ipne ipme 2 internal gear pumps operating instructions. The pumps are ideal for use with variable speed drives. Developed to match the sumitomo internal gear pump, sauer bibus produces and manufactures customised applicationspecific complete solutions to meet. We serve customers just like you at facilities, manufacturing sites, and distribution centers throughout the americas, europe, africa, the middleeast and asia pacic. The casing of the pump is as important as the gear. Abstract the paper comprises research results of the gear pump typical failures and their connection with. The fluidotech ig series positive displacement gear pump has been designed to handle viscous fluids with impurities in suspension and temperatures up to 200 c 392 f whilst delivering a smooth flow. This is a common kind of pump that is mostly used in the applications of hydraulicfluid power. Hseries 3series 2series 4series max series centry series. External gear pump series g azpg22 fixed pumps v 22. Defects classification pawel pietkiewicz chair of mechanics and machine design university of warmia and mazury in olsztyn k e y w o r d s. But, one day, your internal gear pump stops performing its daytoday function and all heck breaks loose.
I mean because of the close clearance between the casing and the teeth of the gears, pressure is developed and we get the pressurized fluid at the end. Flange and cover in aluminium or on request, cast iron. Internal gear pump pgh fixed displacement series 2x re 10223 edition. Internal gear pumps can be used up to a continuous pressure of 315 bar 4550 psi depending on the frame size. These need to be regularly checked for wear as they are what maintain the balance of the gears. In a standard pump, this characteristic is repeated each time a gear tooth meshes. The internal gear pump is exceptionally versatile and also capable of handling thick fluids. Both gear pumps has been tested with 3dprinted nanoparts layer thickness 0. Fluid shall be carried between gear teeth and shall be displaced when the gear teeth mesh. Leading technology, global capacity you may know colfax best by our strong legacy brands that include imo, imo ab and allweiler.
Group 3 gear pumps technical information bibus hidrotos. Internal gear pump fluidotech ig series positive displacement internal gear pumps are designed to work in harsh environments, with unfiltered, abrasive fluids and in a wide temperature and viscosity range. Gear pump working, construction, maintenance marinersgalaxy. Both designs has been testet long time ago for a project with waterspraying nozzles. Comparing 4 types of pd pumps the printed version of this article appeared as, selecting positive displacement pumps. Gear pump division kings mountain, north carolina usa 5 catalog hy090500us. A wide variety of internal gear pumps options are available to you, there are 480 suppliers who sells internal gear pumps on, mainly located in asia. Find here online price details of companies selling internal gear pump. Avoiding damage to hydraulic motors from temperature shock. All too often, blame is placed on the pump because its the pump itself thats noisy and vibrating. Gear pump components pump unit assembly northern pump is a full service gear pump manufacturer. Gear pumps use the actions of rotating cogs or gears to transfer fluids. Relative speeds of the gears in these designs are low. External gear pumps can come in single or double two sets of gears pump configurations with spur shown, helical, and herringbone gears.
Ptopower take off gear pump gauges, valves and accessories. While they are often used on thin liquids such as solvents and fuel oil, they excel at efficiently pumping thick liquids such as asphalt, chocolate, and adhesives. The qx pumps are the 5th generation of bucher internal gear pumps, which have proven themselves in thirty years of service around the world. Pgf hydraulic pumps are leakgapcompensated internal gear pumps with a fixed displacement.
Beinlich zpi internal gear pumps the zpi series pump from beinlich are primarily for lownoise hydraulic drives, as a coolant pump for machine tools and an overdrive pump on hydraulic presses. To return to this page, please click on the red text in the top corner of each page. The straightforward and rugged construction guarantees long service life without the need for extensive maintenance. The gear pump was invented around 1600 by johannes kepler gear pumps are also widely used in chemical installations to pump high viscosity fluids. Some manufacturers produce gear pumps with higher working pressures and speeds but these types of pumps tend to be noisy and special precautions may have to be made. An internal gear pump uses internal and external gears figure 2, below. Modeling and simulation of gear pumps based on modelica. The theoretical flow ripple of an external gear pump.
While they are often used on thin liquids such as solvents and fuel oil, they excel at efficiently pumping thick. This fine clearance is the main object of concern in this pump. The inner gear would turn 11 revolutions, while the outer would turn 10. Liquid enters the suction port between the rotor large exterior gear and idler small interior gear teeth. They are one of the most common types of pumps for hydraulic fluid power applications. Get an overview of the inner workings of an internal gear pump, and where they work best to determine if theyre a good fit for your application. External gear pump overview external gear pumps are a popular pumping principle and are often used as lubrication pumps in machine tools, in fluid power transfer units, and as oil pumps in engines. Internal gear pump with detail explaination and animation in this video, you will learn about an internal gear pump working process. Igp pumps are also available in multiple versions which can be combined to make multiflow groups. Internal gear pumps are made to close tolerances and are damaged when pumping large solids. Useful information on internal gear pumps what is an internal gear pump. The rotor is a larger gear and also an inner gear, and it has the teeth projecting inside. E n g i n e e r i n g gear pump basics the external gear pump is a positive displacement pd type of pump generally used for the transfer and metering of liquids. The johnson pump brand represents more than 50 years of experience in developing and manufacturing gear pumps and is one of the leading suppliers in the market.
This page will introduce you to gear pumps, applications that use gear pumps, and the use of powder metal for producing pump gears. This nomenclature differentiates it from an internalgear pump, which has one gear. But before you trash it, understand the root cause of the failure so you can be sure the next pump doesnt meet the same demise. A flow of oil is produced by the pump due to this rotation. The arrows indicate the direction of the pump and liquid. These instructions contain important notes about operating the pump safely and correctly. This pump principle features a compact design with particularly high energy density. Jul 18, 20 external gear pumps work external gear pumps are similar in pumping action to internal gear pumps in that two gears come into and out of mesh to produce flow. Rated size ng 005 006 008 011 0 016 019 022 025 spec. External gear pump overview michael smith engineers.
We have medium pressure and highpressure pumps in our product portfolio. They are mainly used in the plastic and sheetmetal processing sectors, presses as well as conveying and lifting equipment. A gear pump is a type of pump that uses a network of gears to draw fluids by displacing them. One rotor of internally cut gear teeth will mesh with one externally cut gear.
Issue 5 section 1 standard gear pumps to view a gear pump, please click on the name below or use the bookmarks in your pdf software. The internal design is seen as being reliable, easy to operate and maintain due to only two moving parts being present. Results show that the internal gear pump taken for analysis has a lowpressure pulsation at a high working pressure and a relatively high. What is an internal gear pump and why do you need it. Gear pumps galtech group 2 start pumps 12 tooth gears and consequent decrease in noise levels.
A variable flow internal gear pump is a fixed displacement unit where timing can be varied with respect to the gearing to reduce the net outgoing flow from the delivery volume. Internal gear pump pgh fixed displacement series 2x. External gear pump see th e p r o j ect reso u r ce p a g e o n th. Figure1 control volumes defined in the fluid dynamic model. Their main interest is not the pump itself, but smooth, highquality, uninterrupted production at a lower total cost. Internal gear pumps are primarily used in nonmobile hydraulics e. Gear pumps are compact, high pressure pumps which provide a steady and pulseless fluid. The pump is used in chemical installation that is used to. The pumps are ideal for use with variable speed drives over a very wide speed range and for operation in reverse mode.
Volumetric displacements from 1 to 207 ccrev, up to 120bar operating pressure and supporting viscosities of 10 1,000 mpas. Internal gear pumps have one or two fewer teeth in the inner gear than the outer one. Gear pumps are positive displacement rotary pumps that transport liquids using rotating gears. A gear pump is a type of positive displacement pd pump. Highpressure internal gear pumps machines that run rarely seen, but hard at work in countless machines, voith turbo internal gear pumps reliably provide high pressures. External gear pumps work external gear pumps are similar in pumping action to internal gear pumps in that two gears come into and out of mesh to produce flow. They work with just one gear stage, and thanks to their. Some internal gear pumps have an additional, crescentshaped seal shown above, right. A gear pump uses the meshing of gears to pump fluid by displacement. The term positive displacement for gear pumps describes the fixed amount of fluid they move for each revolution. A minor external gear is mounted, and this is mainly designed for linking by the rotor so that the teeth of the gear. Internal gear pump fluidotech ig series positive displacement internal gear pumps are designed to work in harsh environments, with unfiltered, abrasive fluids and in. Tandem and multiple pumps are available worldwide in more than variants. Displacement d the displacement of a rotary gear pump is the volume displaced during one complete.