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How Does and Oil-Free Screw Vacuum Pump Work?
An oil-free screw is a type of vacuum pump that uses a pair of intermeshing screws, or rotors, to compress and evacuate gases. Unlike other types of vacuum pumps, oil-free screws do not use oil for lubrication or sealing. Instead, the rotors are designed and manufactured to operate without the need for oil, resulting in a clean and efficient vacuum pump that can handle high water vapor loads.To get more news about SEEPEX Pump Parts, you can visit hw-screwpump.com official website.
The operation of an oil-free screw vacuum pump begins when the rotors are driven by an electric motor. As the rotors rotate, they create pockets of gas within the pump housing. These pockets of gas are then compressed and evacuated as the rotors continue to rotate.
One of the key features of an oil-free screw vacuum pump is the design of the rotors. The rotors are typically made of a high-strength, low-friction materials such as cast iron or anodized aluminum. This allows the rotors to operate without the need for lubrication, reducing friction and wear.
Additionally, the rotors are perfectly matched to each other, with a precise clearance between the rotors and the pump housing. This precise clearance allows the rotors to operate smoothly and efficiently, reducing energy losses and increasing the pump's efficiency.
Another important feature of oil-free screw vacuum pumps is the use of a dynamic seal. Because there is no oil used for lubrication or sealing, an oil-free screw vacuum pump must use an alternative method to seal the rotors and prevent the escape of gases. This is typically achieved using a dynamic seal, which is a flexible seal that moves with the rotors and maintains a tight seal around the rotors. The addition of purge gas at the sealing points can provide additional protection in harsh applications.
In conclusion, an oil-free screw is a type of vacuum pump that uses a pair of intermeshing screws, or rotors, to compress and evacuate gases. The rotors are made of a low-friction material and are perfectly matched, allowing them to operate without the need for oil. An oil-free screw vacuum pump is a clean and efficient alternative to other types of vacuum pumps that use oil for lubrication or sealing.
Rotors for eccentric screw pumps
Eccentric screw pumps belong to the positive displacement pump family and are used where the technical tasks exceed the possibilities of pumps of conventional design. In the field of conveying technology, they are used for pumping abrasive, highly viscous and corrosive media. This has contributed to a significant expansion of the range of available conveying systems. Eccentric screw pumps consist of a rotating component, the rotor, and the stationary stator located around it. The rotor rotates eccentrically, as its axis of rotation does not correspond to the axis of symmetry of the stator. The construction of both components form chambers through which the respective medium is conveyed by rotation in the pump via the suction to the discharge side. Rotors consist mainly of steel and have a special spiral geometry as the rotating centre in the stator. Different materials are used in the J?GER Group in the manufacturing process of rotors for eccentric screw pumps. To get more news about Screw pump rotor, you can visit hw-screwpump.com official website.
We manufacture single?, double- and multi-start rotors for all pumping tasks – adapted to the respective media and requirements. Together with our customers we develop innovative rotor geometries with special heads and create calculations and designs based on the latest 3D software.
In addition to our standard sizes, we also produce larger components up to a length of 8 metres for you. For rotors, we offer extensive coating techniques such as hard chrome plating and carbide coatings (e.g. tungsten carbide, chrome carbide) in order to guarantee maximum service life and minimize wear even with the most difficult pumping media in ever new areas of application.
New developments for the conveying technology, the creation of prototypes as well as all processing steps of the later series production can be carried out completely independently of external suppliers in our own company. Thus we offer the greatest possible security, also for your innovations!
Artemis rotors are often used in pumps at elevated temperatures. In order to ensure that the conveying system runs efficiently and smoothly, we adjust the rotor dimensions according to the expansion that occurs. As a specialist in components for conveyor technology, our rotors are used in the food industry, the chemical industry, the construction industry and in the extraction of crude oil, among others.
To ensure our high quality standards, we use the latest 3D coordinate measuring technology. Under the premise of precision at the highest level, the production facilities and machinery of the J?GER Group are certified according to DIN EN ISO 9001:2000.
In our development and production processes, we pay attention to the perfect coordination of stator and rotor geometries to ensure optimum efficiency. We achieve this by using the latest 3D technology as well as simulations of the later operating behaviour of the rotor.
WHIRLING INTERNATIONAL’S WL SERIES SCREW PUMPS
Are you looking for your next workhorse pump? Whirling International has you covered with their heavy-duty WL Pump Series. Ideal for most challenging applications, the WL Series Pumps like to get dirty with Polymer feed, Adhesives, Abrasives Slurry, Fracking and Drilling, and Wastewater Treatment Processes. To get more news about SEEPEX Pump Parts, you can visit hw-screwpump.com official website.
These progressive cavity single eccentric screw pumps are modular in design, providing the luxury of 1-3 stages depending on assembly. This feature allows users to obtain pressure levels of 75psi, 150psi, or 255psi, depending on the stator and rotor length per individual pump.
The rotor-stator assembly forms internal sealed cavities every 180 degrees filled with the desired pumped materials. During the rotor rotation, the opposite cavities fill as the others empty in a smooth equal proportion. The Continuous operation of the equipment generates fluid displacement from the suction to the discharge. This action provides constant flow free of pulsations or positive displacement.
Progressive cavity pumps VISCOPOWERProgressive cavity pumps VISCOPOWER
FLUX VISCOPOWER progressive cavity pumps are suitable for pumping thin to high-viscosity fluids. The displacement pumps work with low turbulence at a constant pressure and provide for a gentle and pulsation-free operation. The VISCOPOWER progressive cavity pumps can be designed for industrial applications as well as for the pharmaceutical, food and cosmetic (Hygienic) sectors. All progressive cavity pumps VISCOPOWER are mobile and stationary, consist of only a few components and are easy and quick to dismantle.To get more news about screw pump stator, you can visit hw-screwpump.com official website.
There is a choice of versions for immersing in the material and for installing outside the container; versions with explosion protection, 3A certification and FLUX FOOD pumps (Directive (EC) 1935/2004 and FDA CFR 21 compliant). For connection of the motor there is a choice between bearing flange and gear. For pumping especially high-viscosity media there are drum emptying systems VISCOFLUX with progressive cavity pumps available.
FLUX progressive cavity pumps VISCOPOWER can also be used for the following applications:
As drum pumps, container pumps and barell pumps with electric commutator motor or compressed air motor for pumping thin-bodied to viscous and highly viscous media up to 100,000 mPas.
As horizontal pumps in TR version for horizontal use for containers that are not accessible from above.
In combination with our various drum emptying systems VISCOFLUX for pumping highly viscous media from lidded drums.
What are the special features of the VISCOPOWER progressive cavity pumps from FLUX?
The VISCOPOWER progressive cavity pumps have been developed with a special focus on easy, intuitive and fast disassembly and cleaning of the surfaces in contact with the media. Thanks to the sophisticated design, the progressive cavity pump can be disassembled quickly and effortlessly. Seals and transitions are designed in such a way that dead spaces have either been completely eliminated or at least minimised. These features make it particularly suitable for use in the food, cosmetics or pharmaceutical industries.
A wide range of applications
A large selection of pre-configured variants is already available for the most common applications and areas of use. For specific needs, media or special applications, the pump can be customised from various modular components to meet your requirements.
Flexibly positioned for the future
Your requirements, areas of application or media could change in the future? No problem for the VISCOPOWER series! Standardised interfaces and a modular system make it possible to replace components such as screws, stators, motors and seals to make the pump fit for changing pumping requirements. to make the pump fit for changing pumping tasks.
The screw pump: Function, areas of application and special features
"Screw pump" is short for eccentric screw pump. After the inventor, it is also known as the Moineau pump , or from English as the PCP pump (progressive or progressing cavity pump). It is one of the rotating positive displacement pumps. The pumped medium is transported from the upper tank through the hose to the spray lance.To get more news about SEEPEX Pump Parts, you can visit hw-screwpump.com official website.
The eccentric screw pump has two main components: on the one hand the rotor, a rotating screw, and on the other hand the stator, a cylinder in which the rotor is located.
The stator has a similar internal geometry to the rotor ,both are helical. When the rotor rotates in the stator, defined empty spaces (conveying chambers) with circumferential sealing result, thus creating a negative pressure. This in turn ensures that the eccentric screw pump is self-priming. Due to the constant movement of the rotor (in contrast to changes in direction of reciprocating pistons and thus corresponding dead centres), material conveying is low in pulsation. At the injection lance, the medium is then divided with the aid of compressed air and can be applied evenly.
Valves for limiting the delivery spaces do not exist in this pump, which means less wear. The rotor moves eccentrically, which means that the axis of rotation of the rotor does not correspond to the axis of symmetry of the complete pump. This is also where the name of the eccentric wrom pump comes from. The eccentric screw pump should not be confused with the Archimedes screw, which is also called a screw pump and is used today especially in the conveyance of solids such as bulk materials. This is a huge helix that simply pushes the conveying elements (often solids) upwards in a trough. There is no stator in which negative pressure is generated, so that this type of material conveying does not belong to the pumps, but is a constant pressure hoist. It was originally used as a water lifting device in ancient times to pump water.
Due to the rotor-stator principle, the WAGNER screw pumps are very easy to operate and infinitely variable and are also suitable for beginners in the field of machine processing. We also make a point of ensuring that our machines are as trouble-free and easy to use as possible for your users - accordingly, WAGNER mortar spraying equipment can be dismantled and reassembledin just a few steps, even on theconstruction site itself. All the wetted parts are made from stainless steel.In addition, our PlastCoat and PlastMax units have a long service life.They are very robust and particularly low-wear and low-maintenance, and the uncomplicated operation avoids sources of error and thus potential for damage. Our WAGNER screw pump also works much more quietly than the standard piston pump!
The screw pump combines many advantageous features of other pump solutions: Like the centrifugal pump, for example, it has no pressure or suction valves, and like a piston pump, the eccentric screw pump also has excellent pumping speed. The flow rate is constant and speed-dependent.Like a gear or screw pump, it handles pumped material with high viscosity, grain size,fibres and inhomogeneous or abrasive materials.
Spraying particularly heavy materials such as plaster or filler is hard work. The biggest advantage of a screw pump is the possibility of achieving a high working speed and yet a high-quality surface result with little physical effort due to the machine processing . The quality of your work does not decrease, on the contrary, and in addition you can plaster, fill, coat or reinforce surfaces much faster. The more surface area involved, the more obvious the time and material savings.
DOES YOUR PROGRESSIVE CAVITY PUMP NOT START?
These positive displacement screw pumps are great for moving thick paste-like fluids at an even speed and pressure but are often problematic with abrasive and aggressive waste-streams.To get more news about Screw pump rotor, you can visit hw-screwpump.com official website.
Whatever your application, if you have an issue with a faulty progressive cavity pump try this checklist for possible solutions.
Here's our trouble-shooter for a variety of progressive cavity pump (screw-pump) issues:
Check the power supply matches the pump motor voltage and amps.
Check that the fuses haven't blown.
Has the pump been idle for some time? The rotor and stator may have ‘bonded', if it doesn't turn then check for dried debris and lubricate with an appropriate oil or glycerin.
Has the cable or its connections been damaged? If so, have the damaged section replaced.
Check that the motor windings haven't burnt out.
Have the pumped fluid's properties changed? Tight tolerances on progressive cavity pumps mean that if the media's viscosity or temperature do not match the pump's specification it can lead to thermal expansion. This could burn the rotor and stator where they rub or even jam it, stopping all movement and putting strain on the motor.
Examine the rotor to make sure it's not blocked or jammed. If it is, then withdraw it from the pump, clean down and if there is no damage evident, reassemble.
Try reducing the pump's rotation speed before switching it on, also check the delta start settings if it is an older 3-phase motor, or invertor settings on a newer 3-phase. Generally, the larger the motor, the longer the time delay between start up and full power is needed. If the pump starts okay on a low speed, wait until it has discharged steadily for a time before increasing speed step-by-step to normal operation.
IS THE PUMP GIVING TOO LITTLE OUTPUT?
Check the feed intake is supplied and that the pump's inlet is fully submerged. Stop the pump and isolate the power while you check for blockages at either end.
Check the motor is rotating in the correct direction. If not, the wiring needs correcting before it is started up again.
Has performance reduced over time? Check the wear parts and replace them if worn out. Progressive cavity pumps rely on tight tolerances and abrasive slurries can soon wear down the stator walling and rotor edges.
Examine the discharge pipework and replace it if leaking or cracked.
Another reason why the pump may be giving too little output is if the final discharge head is too high; where this is the case, you may need to use a larger pump or an alternative type.
Check that the rotation speed is correct. Reduced speed for the same power draw could indicate something jamming inside the pump, or the fluid's viscosity is too high for the pump configuration.
Seven Reasons for Using a Progressing Cavity Pump
Applications where a low NPSH is required, are very challenging for pump manufacturers. It is often necessary to take structural precautions to increase NPSHa values and thus ensure the safe operation of the pumps.To get more news about screw pump stator, you can visit hw-screwpump.com official website.
Especially in the oil and gas industry, liquids close to vapor pressure have to be conveyed regularly. Therefore, applications with low NPSHa are daily business. This requirement makes the design of pumping systems more complex. Often, either plant-side adjustments or NPSH optimized costly design adjustments have to be made to the pump system. By choosing the right pump technology however some complicating factors can be eliminated from the beginning. Often, progressing cavity pumps are only used for highly viscous or solid-laden media. However, they offer numerous advantages especially for applications with low NPSHa.
1 Very low NPSHr
Compared to other pump technologies progressing cavity pumps you can handle a very low NPSHa without expensive constructional adjustments. In the standard design, the values for horizontal pumps are well below 1.5 meters. With NPSHr optimized pump selections, values of well below 0.5m are possible.
2 Cost-effective and space-saving
Some pump types can only cope with a low NPSH in special versions or with special designs, resulting in high acquisition costs for you as a customer. The progressing cavity pump is often a more cost-effective alternative, as it already covers a wide range of NPSH critical applications in standard design. In addition, you can often use the progressing cavity pump in a horizontal design even with low NPSHa values. This saves additional costs for you compared to other pump types that are already designed submerged in these cases. Easy access for repair and maintenance work is guaranteed. Especially for larger installations, you no longer need to use cranes to lift submerged equipment. On-site adjustments to increase the NPSHa, such as installing pumping technology in shafts or the elevated installation of containers, are completely eliminated for you as a customer.
3 Handling changing viscosity and solids
You can handle media containing solids several centimeters in diameter with progressing cavity pumps. This is a decisive advantage for you in applications where solids are expected because other types of pumps often clog. Furthermore, you can cover a wide viscosity range with our progressing cavity pumps without losing efficiency.