German Buehler pump Buehler model Buehler price

Buehler pumps operate by using impeller rotation to induce centrifugal motion in water. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, start the motor to drive the pump shaft, causing the impeller and water to rotate at high speed. The water undergoes centrifugal motion, is thrown toward the outer edge of the impeller, and flows into the discharge pipe of the water pump through the flow channel of the volute casing.

Buehler pump structural composition

The basic structure of a centrifugal pump consists of six parts: the impeller, pump body, pump shaft, bearings, sealing ring, and packing gland. 1) The impeller is the core component of the centrifugal pump; it has high rotational speed and high output. The blades on the impeller play a major role, and the impeller must undergo static balance testing before assembly. The inner and outer surfaces of the impeller are required to be smooth to reduce friction losses from water flow. 2) The pump body, also known as the pump casing, is the main body of the water pump. It provides support and fixation and connects to the bracket where the bearings are installed. 3) The function of the pump shaft is to connect to the motor via a coupling and transmit the motor's torque to the impeller, making it the primary component for transmitting mechanical energy. 4) Sliding bearings use transparent oil as a lubricant, filled to the oil level line. Too much oil will seep out along the pump shaft, while too little will cause the bearing to overheat and fail, leading to accidents! During pump operation, the maximum bearing temperature is 85 degrees, with normal operation around 60 degrees. 5) The sealing ring is also known as the leakage reduction ring. 6) The packing gland mainly consists of packing, a water seal ring, a packing sleeve, a packing gland cover, and a water seal pipe. The primary function of the packing gland is to seal the gap between the pump casing and the pump shaft, preventing water inside the pump from leaking out and air from entering the pump. This maintains the vacuum inside the water pump. When heat is generated by friction between the pump shaft and the packing, water from the water seal pipe flows into the water seal ring to cool the packing, ensuring normal pump operation. Therefore, inspection of the packing gland is particularly important during routine checks of pump operation. The packing should be replaced after approximately 600 hours of operation.

Buehler pump maintenance

1) Compact structure, small size, and light weight: Composed of an aluminum alloy front cover, intermediate body, and rear cover, along with gears made of alloy steel and pressure plates made of aluminum alloy. Two DU bearings are press-fitted inside the front and rear covers. 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. It reduces bearing load and automatically adjusts the axial clearance of the gear pump, thereby effectively improving the performance indicators and operational reliability of the gear pump. 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: Rotational speed ranges from 3000 to 4000 rpm, with theoretical torque from 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 installation flanges, shaft extensions, and inlet/outlet port connections. Widely applicable in hydraulic systems for automobiles, tractors, engineering machinery, agricultural machinery, and other mechanical equipment.

Buehler pump working principle

Submersible pumps come in several types, including oil-immersed, water-immersed, and dry-type motor windings. Always read the manual before use to avoid errors. If unused for a long period, the impeller must be rotated manually before operation to prevent seizing and burning out due to prolonged inactivity. Before starting the pump, the suction pipe and pump interior must be filled with liquid. After starting, the impeller rotates at high speed, causing the liquid to rotate with the blades. Under centrifugal force, the liquid is thrown outward from the impeller. As the ejected liquid enters the diffusion chamber of the pump casing, its velocity gradually decreases while pressure increases, before exiting through the pump outlet and discharge pipe. Meanwhile, a vacuum low-pressure zone devoid of air and liquid forms at the center of the blades because the liquid is thrown outward. Liquid from the sump flows into the pump through the suction pipe under the influence of atmospheric pressure on the sump surface. In this way, liquid is continuously drawn up from the sump and discharged through the outlet pipe.

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