German VOLKMANN pump VOLKMANN model VOLKMANN price

The most basic form of the VOLKMANN 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, fills this space, moves along the housing as the teeth rotate, and is finally discharged when the two teeth mesh.

VOLKMANN pump motor characteristics

1) Compact structure, small size, and light weight: composed of an aluminum alloy front cover, intermediate body, and rear cover, alloy steel gears, and aluminum alloy pressure plates and other components. Two DU bearings are press-fitted into the front and rear covers respectively. DU material is the 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 direction without front bearing, double rotation direction without front bearing, single rotation direction with front bearing, and double rotation direction with front bearing. Gear motors equipped with front bearings can withstand both radial and axial forces. 3) High speed and high pressure: rotational speed ranges from 3000 to 4000 rpm, with a theoretical torque of 17N.m (N·m) to 64N.m, capable of reaching 20-25MPa. 4) Connection methods suitable for imported machinery and engineering equipment: compliant with SAE and national standard GB for mounting flanges, shaft extensions, and inlet/outlet port connections. Widely applicable in hydraulic systems for automobiles, tractors, engineering machinery, agricultural machinery, and other mechanical equipment.

VOLKMANN pump operating principle

During operation, the cam on the fuel injection pump camshaft and the plunger spring force the plunger to perform reciprocating up-and-down motion, thereby completing the fuel pumping task. The fuel pumping process can be divided into the following three stages. Conclusion: Based on the above discussion, the following conclusions are drawn: (1) The total stroke L of the plunger's reciprocating motion is constant and determined by the cam lift. (2) The fuel delivery volume per plunger cycle depends on the delivery stroke; the delivery stroke is not controlled by the camshaft and is variable. (3) The start of fuel delivery does not change with variations in the delivery stroke. (4) Rotating the plunger changes the end of fuel delivery timing, thereby altering the fuel delivery volume. 3. Domestic series plunger-type fuel injection pumps: Domestic series plunger pumps mainly include the A, B, P, Z, and No. I, II, III series. Standardization is based on different fuel delivery requirements according to the single-cylinder power range of diesel engines. Using plunger stroke, pump cylinder center distance, and structural type as the basis, various plunger diameters are paired to create several fuel injection pumps with different delivery volumes per working cycle, meeting the needs of various diesel engines. The operating principles and structural types of domestic series fuel injection pumps are basically similar. Taking the A type pump as an example, the construction and operating principle of the plunger-type fuel injection pump are introduced. The plunger pump consists of four main parts: the pumping element, fuel quantity adjustment mechanism, drive mechanism, and pump body. It features microprocessor intelligent control, LCD display, and communication capability with computers, offering stable working pressure, low pulsation, and convenient operation. It is widely used in biochemistry, pharmaceuticals, chemical industry, environmental protection, and other industries, meeting the requirements for continuous constant-pressure and constant-flow liquid transfer in these sectors.

VOLKMANN pump maintenance and overhaul

(1) Inspect the plunger for scratches and corrosion; replace with new parts if necessary. (2) Check the fit of the plunger assembly. Insert the plunger end into the plunger barrel and tilt it approximately 60°. If the plunger slides down slowly under its own weight, the fit is good. (3) Check the sealing of the plunger assembly. Hold the plunger barrel, block the plunger top and side oil inlet with two fingers, and pull out the plunger with the other hand. A significant suction force should be felt, and the plunger should immediately retract to its original position upon release, indicating good sealing of the plunger assembly; otherwise, replace the plunger assembly. (4) Inspect the decompression band of the delivery valve assembly for wear, steps, or scratches; replace if necessary. (5) Check the fit of the delivery valve assembly. Block the lower hole of the delivery valve with one finger and gently press the delivery valve downward with another finger. When the finger is removed from the top of the delivery valve, it should automatically spring back to its original position, indicating good sealing of the delivery valve assembly; otherwise, replace the delivery valve assembly. (6) Inspect the tappet body. The standard clearance between the fuel injection pump body and the tappet body is 0 to 0.03mm. If it exceeds 0.2mm, replace the parts. (7) Check the clearance between the plunger flange and the groove of the control sleeve, which should be 0.02 to 0.08mm. If it exceeds 0.12mm, the control sleeve must be replaced.

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