German Elmo Rietschle pump Elmo Rietschle model Elmo Rietschle price

The most basic form of the Elmo Rietschle pump consists of two gears of identical size meshing and rotating within a closely fitted housing. The interior of this housing resembles the shape of the number "8", with the two gears installed inside; the outer diameter and sides of the gears fit tightly against the housing. Material from the extruder enters between the two gears at the suction inlet, fills this space, moves along the housing as the teeth rotate, and is finally discharged when the two teeth mesh.

Elmo Rietschle pump motor features

1) Compact structure, small size, and light weight: Composed of front cover, intermediate body, and rear cover made of aluminum alloy, gears made of alloy steel, and pressure plates made of aluminum alloy. Two DU bearings are press-fitted into the front and rear covers respectively. DU material is an ideal bearing material for gear pumps, significantly extending the service life of the gear pump. 2) Reliable operation: The pressure plate is the main component for radial and axial pressure compensation, reducing bearing load and automatically adjusting the axial clearance of the gear pump, thereby effectively improving the performance indicators and operational reliability of the gear pump. The GM5 and GPC4 series gear motors offer four structural configurations: single rotation without front bearing, double rotation without front bearing, single rotation with front bearing, and double rotation with front bearing. Gear motors with front bearings can withstand both radial and axial forces. 3) High speed and high pressure: High speed 3000~4000 rpm, theoretical torque 17N.m (N·m) to 64N.m, reaching up to 20-25MPa. 4) Connection methods suitable for imported machinery and engineering equipment: Complies with SAE and national standard GB for mounting flanges, shaft extensions, oil inlet, and oil outlet connection styles. Widely applicable to hydraulic systems in automobiles, tractors, engineering machinery, agricultural machinery, and other mechanical equipment.

Elmo Rietschle pump working principle

The concept of a gear pump is very simple. Its most basic form consists of two gears of identical size meshing and rotating within a closely fitted housing. The interior of this housing resembles the shape of the number "8", with the two gears installed inside; the outer diameter and sides of the gears fit tightly against the housing. Material from the extruder enters between the two gears at the suction inlet, fills this space, moves along the housing as the teeth rotate, and is finally discharged when the two teeth mesh. A gear pump is also known as a positive displacement device. Like a piston in a cylinder, when one tooth enters the fluid space of another tooth, the liquid and the tooth cannot occupy the same space simultaneously because the liquid is incompressible; thus, the liquid is mechanically squeezed out. Due to the continuous meshing of the teeth, this phenomenon occurs continuously, providing a continuous discharge volume at the pump outlet. The discharged volume per revolution is constant. As the drive shaft rotates uninterrupted, the pump discharges fluid uninterrupted. The pump flow rate is directly related to the pump speed. In practice, there is a small amount of fluid loss within the pump, as this fluid is used to lubricate the bearings and the sides of the gears. Since the pump body cannot have a gap-free fit, it is impossible for the fluid to be discharged from the outlet 100%, so a small amount of fluid loss is inevitable, preventing the pump's operating efficiency from reaching 100%. However, the pump can still operate well, achieving an efficiency of 93% to 98% for most extruded materials. This pump is not significantly affected by fluids whose viscosity or density changes during the process. If there is a damper, such as a filter screen or restrictor on the discharge side, the pump will push the fluid through them. If this damper changes during operation—i.e., if the filter becomes dirty or clogged, or if the back pressure of the restrictor increases—the pump will maintain a constant flow rate until the mechanical limit of the weakest component in the system is reached (usually equipped with a torque limiter). There is actually a limit to the speed of a pump, which mainly depends on the process fluid. If pumping oil, the pump can rotate at high speeds, but this limit increases significantly when the fluid is a high-viscosity polymer melt. It is crucial to fill the space between the two teeth on the suction side with high-viscosity fluid; if this space is not fully filled, the pump cannot discharge an accurate flow rate. Therefore, the PV value (pressure × flow velocity) is another limiting factor and a process variable. Due to these limitations, gear pump manufacturers offer a range of products with different specifications and displacements (volume discharged per revolution). These pumps are matched to specific application processes to optimize system capacity and price.

Elmo Rietschle pump selection

The function of a vacuum pump is to remove gas molecules from the vacuum chamber, reduce the gas pressure within the chamber, and achieve the required vacuum level. Broadly speaking, the range from atmospheric pressure to ultra-high vacuum is vast, and no single vacuum system can cover this entire range to date. Therefore, to meet the process indicators, work efficiency, and equipment service life requirements of different products, different vacuum system configurations must be selected for different vacuum ranges. To achieve optimal configuration, the following points should be considered when selecting a vacuum system: First, check and determine the vacuum level required for each process. Since each process has its applicable vacuum range, it must be carefully studied and determined. Based on the determined process vacuum requirement, check the ultimate vacuum of the vacuum pump system, as the system's ultimate vacuum determines its optimal operating vacuum. Generally, the system's ultimate vacuum is 20% lower than the system's operating vacuum, and 50% lower than the ultimate vacuum of the forepump. Check and determine the type of gas to be pumped and the pumping capacity required for the process. If the pumped gas reacts with the liquid inside the pump, the pump system will be contaminated. Simultaneously, consider and determine the appropriate exhaust time and the volume of gas generated during the pumping process. Check and determine the time required to reach the required vacuum level, as well as the flow resistance and leakage of the vacuum piping. Consider the pumping speed needed to maintain the vacuum under certain process conditions after the required vacuum level is achieved.

Weidou Intelligent Technology specializes in selling German Elmo Rietschle vacuum pumps, Elmo Rietschle gear pumps, Elmo Rietschle diaphragm pumps, Elmo Rietschle centrifugal pumps, Elmo Rietschle piston pumps, Elmo Rietschle vacuum pumps, Elmo Rietschle screw pumps, Elmo Rietschle submersible pumps, Elmo Rietschle peristaltic pumps, Elmo Rietschle lubrication pumps, Elmo Rietschle vane pumps, Elmo Rietschle metering pumps, Elmo Rietschle hand pumps, Elmo Rietschle drum pumps, Elmo Rietschle lobe pumps, Elmo Rietschle booster pumps, Elmo Rietschle liquid pumps, Elmo Rietschle air pumps. Original imports from Germany. Welcome inquiries and orders from users.