German HORN TECALEMIT pump HORN TECALEMIT model HORN TECALEMIT price

HORN TECALEMIT pump is a typical positive displacement hydraulic machine, driven by a prime mover, converting input mechanical energy into pressure energy of the liquid, and then inputting it into the system in the form of pressure and flow. It is the power source of the hydraulic system. Since it can transport liquids under high pressure, it is widely used in various industries in industrial production and daily life, such as water conservancy, construction, and energy. In addition, it is also widely used in shipbuilding, oil extraction, and loaders.

HORN TECALEMIT pump structural form

Plunger pumps are divided into two representative structural forms: axial plunger pumps and radial plunger pumps; since radial plunger pumps are a new type of high-efficiency pump with high technical content, with the continuous acceleration of localization, radial plunger pumps will inevitably become an important part of the application field of plunger pumps; a radial plunger pump is a plunger pump in which the reciprocating motion direction of the piston or plunger is perpendicular to the drive shaft. Radial plunger pump working principle: Drive torque is transmitted from the drive shaft through a cross coupling to the star-shaped hydraulic cylinder rotor, and the stator is not subject to other lateral forces. The rotor is mounted on the distribution shaft. The radially arranged plungers located in the rotor press tightly against the eccentric stroke stator through hydrostatically balanced slippers. The plunger is connected to the slipper via a ball joint and locked with a retaining ring. Two retaining rings hold the slippers on the stroke stator. When the pump rotates, it presses against the inner surface of the stator relying on centrifugal force and hydraulic pressure. When the rotor rotates, due to the eccentricity of the stator, the plunger will perform reciprocating motion, and its stroke is 2 times the stator eccentricity. The eccentricity of the stator can be adjusted by two plungers positioned radially opposite each other on the pump body. Oil inlet and outlet pass through flow channels on the pump body and distribution shaft, and are controlled by the suction port on the distribution shaft. The hydraulic pressure generated inside the pump body is absorbed by the hydrostatically balanced surface. The hydrostatic balance of the friction pair adopts an over-balance pressure compensation method, forming open-loop control. The bearings supporting the drive shaft only serve a supporting role and are not subject to other external forces. In hydraulic systems: Axial plunger pumps operate by utilizing volume changes produced by the reciprocating motion of plungers parallel to the transmission shaft within plunger bores. Since the plungers and plunger bores of plunger pumps are circular parts, very high precision fits can be achieved during machining.

HORN TECALEMIT pump mechanical principle

The total stroke L of the plunger's reciprocating motion in a plunger pump is constant and determined by the cam lift. The fuel delivery volume per cycle depends on the delivery stroke, which is variable and not controlled by the camshaft. The start of fuel delivery does not change with variations in the delivery stroke. Rotating the plunger changes the end of fuel delivery, thereby altering the fuel delivery volume. During operation, the cam on the injection pump camshaft and the plunger spring force the plunger to move up and down, completing the pumping task. The pumping process can be divided into the following two stages: 1) Intake process: After the cam lobe rotates past, the plunger moves downward under spring force, creating a vacuum in the upper space of the plunger (called the pumping chamber). When the upper end face of the plunger opens the inlet port on the plunger sleeve, diesel fuel filling the oil passage in the upper body of the fuel pump enters the pumping chamber through the port. The intake ends when the plunger reaches bottom dead center. 2) Return process: The plunger moves upward to deliver fuel. When the helical groove (cut-off edge) on the plunger aligns with the return port on the sleeve, the low-pressure oil circuit in the pumping chamber communicates with the central hole, radial holes, and helical groove at the plunger head. Oil pressure drops sharply, and the delivery valve closes rapidly under spring force, stopping fuel delivery. The plunger continues to move upward; after the cam lobe rotates past, the plunger moves downward again under spring force, starting the next cycle. This description uses a single plunger as an example. A plunger pump has two check valves oriented in opposite directions. When the plunger moves in one direction, negative pressure occurs in the cylinder, opening one check valve and drawing liquid into the cylinder. When the plunger moves in the other direction, it compresses the liquid, opening the other check valve and discharging the liquid from the cylinder. This continuous operation results in continuous fuel delivery.

HORN TECALEMIT pump maintenance

(1) Inspect the plunger for scratches and corrosion; replace with a new part if necessary. (2) Check the fit of the plunger assembly. Insert the plunger tip into the plunger sleeve 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 sleeve, block the top and side inlet ports of the plunger with two fingers, and pull out the plunger with the other hand. Significant suction felt and immediate return of the plunger to its original position upon release indicate good sealing; 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, gently press the delivery valve downward with another finger, and release. If it automatically springs back to its original position, the sealing is good; otherwise, replace the delivery valve assembly. (6) Inspect the tappet body. The standard clearance between the 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.

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