German denios pump denios model denios price

denios pumps are rotary pumps that transport liquids or increase their pressure by relying on the change and movement of the working volume formed between the pump cylinder and the meshing gears. Two enclosed spaces are formed by two gears, the pump body, and the front and rear covers. When the gears rotate, the volume of the space on the disengaging side increases from small to large, creating a vacuum that draws in the liquid. The volume of the space on the meshing side decreases from large to small, squeezing the liquid into the pipeline. The suction chamber and the discharge chamber are separated by the meshing line of the two gears. The pressure at the discharge port of the gear pump depends entirely on the magnitude of the resistance at the pump outlet.

denios pump structural features

1) Simple structure, low price; 2) Low operational requirements, wide application; 3) The end covers and the various tooth slots of the gears form many fixed sealed working chambers, so it can only be used as a fixed displacement pump. The gears adopt the new technology of double-arc sine curve tooth profile arc, which was at an advanced international level in the nineties. Compared with involute gears, its most prominent advantage is that there is no relative sliding on the tooth profile surface during the gear meshing process, so there is no wear on the tooth surface, smooth operation, no fluid trapping phenomenon, low noise, long service life, and high efficiency. This pump breaks free from the constraints of traditional design, bringing gear pump design, production, and use into a new field. The pump is equipped with a differential pressure safety valve as overload protection. The full return pressure of the safety valve is 1.5 times the rated discharge pressure of the pump. It can also be adjusted according to actual needs within the allowable discharge pressure range. However, this safety valve cannot be used as a pressure reducing valve for long-term work; a pressure reducing valve can be installed separately if needed. The shaft end seal of this pump is designed in two forms: one is mechanical seal, and the other is packing seal, which can be determined according to specific usage conditions and user requirements.

denios pump drive unit

The gear pump is driven by an independent motor, which can effectively block upstream pressure pulsations and flow fluctuations. The pressure pulsation at the gear pump outlet can be controlled within 1%. Adopting a gear pump on an extrusion production line can increase the flow output speed and reduce the shear and residence time of materials in the extruder. External meshing gear pumps are the most widely used type of gear pump; generally, when referring to gear pumps, it usually means external meshing gear pumps. Its structure is shown in Figure 5-14, mainly consisting of a driving gear, a driven gear, a pump body, a pump cover, and a safety valve. The sealed space formed by the pump body, pump cover, and gears is the working chamber of the gear pump. The shafts of the two gears are respectively installed in the bearing holes on the two pump covers. The driving gear shaft extends out of the pump body and is rotated by the motor. External meshing gear pumps have a simple structure, light weight, low cost, reliable operation, and wide application range. When the gear pump is working, the driving gear rotates with the motor and drives the driven gear to rotate. When the meshing teeth on the suction chamber side gradually separate, the volume of the suction chamber increases, the pressure decreases, and the liquid in the suction pipe is drawn into the pump. The sucked liquid is pushed by the gears in the tooth slots along two paths to the discharge chamber. After the liquid enters the discharge chamber, due to the continuous meshing of the teeth of the two gears, the liquid is squeezed and enters the discharge pipe from the discharge chamber. As the driving gear and the driven gear rotate continuously, the pump can continuously suck in and discharge liquid. A safety valve is installed on the pump body. When the discharge pressure exceeds the specified pressure, the conveyed liquid can automatically push open the safety valve, allowing the high-pressure liquid to return to the suction pipe. Internal meshing gear pumps consist of a pair of mutually meshing internal gears, a crescent-shaped piece between them, a pump shell, etc. The function of the crescent-shaped piece is to separate the suction chamber from the discharge chamber. When the driving gear rotates, a partial vacuum is formed where the gears disengage, and the liquid is sucked into the pump, filling the spaces between the teeth in the suction chamber. Then, it enters the discharge chamber along the inner and outer sides of the crescent-shaped piece via two paths. Where the teeth enter meshing, the liquid existing between the teeth is squeezed and sent into the discharge pipe. In addition to having self-priming capability and flow rate independent of discharge pressure, gear pumps have no suction or discharge valves on the pump shell, featuring simple structure, uniform flow, and reliable operation. However, they have low efficiency, high noise and vibration, and are prone to wear. They are mainly used to transport various oils that are non-corrosive, free of solid particles, and have lubricating properties, with temperatures generally not exceeding 70 ℃, such as lubricating oil and edible vegetable oil. The general flow range is 0.045～30ms/h, the pressure range is 0.7—20MPa, and the operating speed is 1200—4000r/min.

denios pump mechanical maintenance

For piston pumps using a boost pump for oil supply, after 3000h of use, operators need to check the piston pump 1-2 times daily to ensure the hydraulic pump operates with normal sound. If a decrease in hydraulic cylinder speed or stalling is observed, the boost pump should be disassembled for inspection to check for scratches on the impeller edges and whether the clearance of the internal gear pump is too large. For self-priming piston pumps, the oil level in the hydraulic tank must not be lower than the lower limit of the oil gauge; sufficient hydraulic oil must be maintained. The higher the cleanliness of the hydraulic oil, the longer the service life of the hydraulic pump. The most important component of a piston pump is the bearing. If the bearing develops clearance, it cannot guarantee the normal clearance of the three pairs of friction pairs inside the hydraulic pump, and it will also disrupt the thickness of the static hydrostatic support oil film of each friction pair, reducing the service life of the piston pump bearings. According to data provided by hydraulic pump manufacturers, the average service life of bearings is 10000h. Exceeding this value requires replacement with new ones. Removed bearings cannot be tested for clearance without professional detection instruments; only visual inspection is possible. If scratches or discoloration are found on the roller surface, they must be replaced. When replacing bearings, note the English letters and model number of the original bearing. Piston pump bearings mostly use high-load capacity bearings. Purchase products from the original manufacturer with original specifications. If changing to another brand, consult personnel experienced with bearings to check tables for equivalents, aiming to maintain the bearing's precision grade and load capacity. The service life of a piston pump is related to routine maintenance, the quantity and quality of hydraulic oil, and oil cleanliness. Avoiding wear on the piston pump friction pairs caused by particles in the oil is also an effective way to extend the piston pump's life. During maintenance, try to use original manufacturer-produced parts when replacing components. These parts may sometimes be more expensive than other counterfeit parts, but their quality and stability are better. Buying cheap counterfeit parts may seem to save costs in the short term, but it brings hidden dangers and may cause greater harm to the use of the piston pump. There are two forms of distribution plates: flat distribution and spherical distribution. For friction pairs with spherical distribution, if the scratches on the cylinder body distribution surface are relatively shallow, they can be repaired by grinding. If the grooves on the cylinder body distribution surface are deep, surface engineering technology should first be used to fill the grooves before grinding. Blind grinding should be avoided to prevent the copper layer from becoming too thin or leaking oil exposing the steel base. Piston pumps can also use frequency converters to save energy. Engineers from Shanghai Zhengyi point out that in actual production processes, piston pumps usually regulate their working status by pressure or flow. When the actual pressure is greater than the required pressure, it is regulated by a relief valve to keep the working pressure stable, allowing the relief valve to release the excess. The motor always runs at full speed with repeated actions, and power consumption remains unchanged. When using overflow to regulate pressure and flow, some surplus flows back to the original system, resulting in useless power in the piston pump and low work efficiency. If a Chuangjie energy-saving frequency converter is used, the relief valve can be set to close, and the working pressure is automatically adjusted by the energy-saving frequency converter itself to maintain stable working pressure and automatically track the equipment pressure. This achieves automated control, thereby saving energy consumption. The greatest advantage of this regulation method is that it can reduce the operating energy consumption of the piston pump, with power saving effects reaching 30% or more.

Weidou Intelligent Technology specializes in selling German denios piston pumps, denios gear pumps, denios diaphragm pumps, denios centrifugal pumps, denios piston pumps, denios vacuum pumps, denios screw pumps, denios submersible pumps, denios peristaltic pumps, denios lubrication pumps, denios vane pumps, denios metering pumps, denios hand pumps, denios drum pumps, denios cam pumps, denios booster pumps, denios liquid pumps, denios air pumps. Original imports from Germany. Welcome customers to inquire and order.