German LUBRICUS pump, LUBRICUS model, LUBRICUS price

The most basic form of the LUBRICUS 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 diameters and sides of the gears fit tightly against the housing. Material from the extruder enters between the two gears at the suction inlet, filling this space. It moves along the housing as the teeth rotate and is finally discharged when the two gears mesh.

LUBRICUS pump working principle

The concept of a gear pump is 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 diameters and sides of the gears fit tightly against the housing. Material from the extruder enters between the two gears at the suction inlet, filling this space. It moves along the housing as the teeth rotate and is finally discharged when the two gears 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, the incompressibility of the liquid prevents the liquid and the tooth from occupying the same space simultaneously, mechanically forcing the liquid 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 continuously, the pump discharges fluid without interruption. The pump flow rate is directly related to the pump speed. In practice, there is minimal fluid loss within the pump, as some fluid is used to lubricate the bearings and gear sides. Since a gap-free fit in the pump body is impossible, the fluid cannot be discharged from the outlet at 100%, making some fluid loss inevitable. Consequently, the pump's operating efficiency cannot reach 100%. However, the pump can still operate effectively, achieving efficiencies of 93% to 98% for most extruded materials. This pump is not significantly affected by changes in fluid viscosity or density during the process. If a damper, such as a filter screen or restrictor, is placed 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 until the mechanical limit of the weakest component in the system is reached (a torque limiter is usually installed). The pump speed is actually limited, primarily depending on the process fluid. If oil is being conveyed, the pump can rotate at high speeds; however, if the fluid is a high-viscosity polymer melt, this limitation increases significantly. 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 deliver 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 cost.

LUBRICUS pump usage precautions

Gear pumps are suitable for various industries and handle a wide range of media. These gear pumps offer advantages such as robust construction, easy installation, simple disassembly, straightforward maintenance, uniform and continuous flow, minimal wear, and long service life. 1) During gear pump operation, frequent greasing is required. Since lubricating grease evaporates relatively easily, attention must be paid to replenishment and replacement. Additionally, keep the bearing area clean. 2) When using or after using the electric oil extraction pump, store it in a dry, non-corrosive, and clean environment. 3) Regularly inspect and maintain the gear pump during use. Check the electric oil drum, including the power cord, internal wiring, plug, and switch, to ensure they function properly. Inspect bearing components for any damage. 4) Preserve every component of the gear pump. During disassembly and inspection, keep all parts clean and stored properly.

LUBRICUS pump maintenance

When using a gear pump, wear of the gear pump is unavoidable, therefore many problems will arise, so it is necessary to learn the most common maintenance techniques for gear pumps. This enables accurate diagnosis when problems occur. Routine maintenance techniques are as follows: 1) Maintenance of the working surface: If the wear on the pump cover working surface is relatively small, you can manually use a lapping method to remove the wear marks, that is, place a small amount of valve grinding compound on a surface plate or thick glass plate, then place the pump cover on top and lap it, until the wear marks are ground away, and the working surface is flat. If the wear depth on the working surface of the pump cover exceeds zero point one millimeter, turning followed by lapping must be used for repair. 2) Maintenance of the drive shaft bushing bore: The repair method for wear of the drive shaft bushing bore on the pump cover is the same as that for wear of the drive shaft bushing bore in the housing. Repair of the pump housing bore: After the pump housing bore is worn, the bore lining method is always used for repair, which involves boring out the inner bore and fitting a cast iron or steel bushing. After inserting the bushing, bore the inner cavity to the required dimensions, and grind off the portion of the bushing protruding from the end face, so that it is flush with the mating surface of the pump housing. 3) Maintenance of the valve seat: Pressure relief valves come in two types: ball valve and plunger valve. After the ball valve seat is worn, place a steel ball on the valve seat, then gently tap the steel ball with a metal rod, until the ball valve seats tightly against the valve seat. If the valve seat is severely worn, ream to remove the wear marks, and then use the above method to achieve a tight seal. After the plunger-type valve seat wears out, a small amount of valve grinding compound can be added for lapping, lapping until a tight seal is achieved. The above describes some of the most basic maintenance procedures for components of gear pumps. During application, other different problems may also be encountered. These different problems must be carefully analyzed to identify their root causes.

Weidou Intelligent Technology specializes in selling German LUBRICUS lubrication pumps, LUBRICUS gear pumps, LUBRICUS diaphragm pumps, LUBRICUS centrifugal pumps, LUBRICUS piston pumps, LUBRICUS vacuum pumps, LUBRICUS screw pumps, LUBRICUS submersible pumps, LUBRICUS peristaltic pumps, LUBRICUS lubrication pumps, LUBRICUS vane pumps, LUBRICUS metering pumps, LUBRICUS hand pumps, LUBRICUS barrel pumps, LUBRICUS cam pumps, LUBRICUS booster pumps, LUBRICUS liquid pumps, and LUBRICUS air pumps. All products are original imports from Germany. Customers are welcome to inquire and place orders.