German trumpf pump trumpf model trumpf price

trumpf pumps are pumps in which the vanes in the rotor slots contact the pump casing (stator ring) to press the sucked liquid from the inlet side to the outlet side. There are two types: One) Specifically refers to vane pumps among positive displacement pumps. Two) Refers to the three types of dynamic pumps (centrifugal pumps, mixed-flow pumps, axial-flow pumps) or other special pumps. Such pump products are generally not called vane pumps. However, in specialized literature, vane pumps almost entirely refer to centrifugal pumps, mixed-flow pumps, axial-flow pumps, etc. Depending on whether the theoretical displacement per revolution is a fixed value or a variable value, they can be divided into variable displacement vane pumps and fixed displacement vane pumps.

trumpf pump working principle

Its operating principle is similar to that of a single-acting vane pump. The only difference is that the stator surface consists of eight parts: two long-radius arcs, two short-radius arcs, and four transition curves, and the stator and rotor are concentric. With the rotor rotating clockwise as shown, the volume of the sealed working chamber gradually increases at the upper left and lower right corners, forming the suction zone, and gradually decreases at the lower left and upper right corners, forming the pressure zone; an oil-sealing zone separates the suction and pressure zones. For each revolution of the rotor, each sealed working chamber completes two suction and two pressure actions, hence it is called a double-acting vane pump. The two suction zones and two pressure zones of the pump are radially symmetric, and the hydraulic pressure acting on the rotor is radially balanced, so it is also called a balanced vane pump. The instantaneous flow rate of a double-acting vane pump is pulsating; when the number of vanes is a multiple of 4, the pulsation rate is small. Therefore, the number of vanes for double-acting vane pumps is generally chosen as 12 or 16.

trumpf pump usage precautions

In addition to preventing dry running, overload, air ingestion, and excessive suction vacuum, the management points for vane pumps also include: 1) If the pump rotation direction changes, the suction and discharge directions also change. Vane pumps have a specified rotation direction and reverse rotation is not allowed. Because the rotor vane slots are inclined, the vanes have chamfers, the bottom of the vanes communicates with the discharge chamber, and the throttle grooves and suction/discharge ports on the valve plate are designed for a specific rotation direction. Reversible vane pumps must be specially designed. 2) Vane pump assembly: The valve plate and stator must be correctly positioned with locating pins. The vanes, rotor, and valve plate must not be installed backwards. The suction zone part of the stator inner surface wears most easily; if necessary, it can be flipped for installation so that the original suction zone becomes the discharge zone for continued use. 3) Disassembly and assembly: Keep working surfaces clean, and ensure the oil is well filtered during operation. 4) If the clearance between the vanes and the vane slots is too large, leakage will increase; if it is too small, the vanes cannot extend and retract freely, leading to malfunction. 5) The axial clearance of the vane pump has a significant impact on ηv. 1) Small pumps - 0.015～0.03mm2) Medium-sized pumps - 0.02～0.045mm6. Oil temperature and viscosity should generally not exceed 55℃, and viscosity should be between 17 and 37mm2/s. If the viscosity is too high, oil suction is difficult; if the viscosity is too low, leakage is severe. As pump products, vane pumps more often refer to sliding vane pumps. Vane pumps almost entirely refer to sliding vane pumps.

trumpf pump common problems

1) Insufficient flow. Causes and remedies for insufficient flow in vane pumps. Loose screws at the top cover increase axial clearance and reduce volumetric efficiency. Tighten the screws appropriately to ensure uniform and proper clearance (clearance is 0.04～0.07 mm). If individual vanes do not slide smoothly, clean them. If they remain stiff after cleaning, adjust them individually in their slots. Wear on the stator inner surface prevents good contact between the vanes and the stator; wear usually occurs in the suction chamber. Severe wear on the valve plate face requires replacement. If the vanes and rotor are installed backwards, align the vane inclination direction with the rotor rotation direction. Large system leakage requires checking each component for leaks and checking if the pressure gauge is blocked by dirt. 2) Oil not being sucked up. Causes and remedies for vane pumps failing to suck up oil. If the oil level is too low, check and fill to the specified mark. If the oil viscosity is too high, causing vanes to slide poorly in the rotor slots, generally use 20# hydraulic oil or 22# turbine oil. Poor contact between the valve plate face and the housing plane causes communication between high and low-pressure chambers; repair the valve plate face. Sand holes in the pump body cause communication between high and low-pressure chambers; replace the pump. If the motor rotation is reversed, correct it. 3) Excessive pump noise. A clogged oil filter causes poor suction; clean it. Air leakage at the suction end can be checked by applying butter to the suction pipe joints one by one; if noise decreases, tighten the joint. Directly observe if bubbles appear at the return oil port. Wear on the pump end seal can be checked by applying butter to the shaft oil seal; if noise decreases, replace the oil seal. Pump cover screws may loosen due to vibration; apply butter to the screw connections, and if noise decreases, tighten the screws. Misalignment between the pump and motor shafts requires realignment. If the sides of the rotor vane slots are not perpendicular to its end faces, replace the rotor. If the valve plate relief triangular groove is too short, modify it appropriately with a file so that when the previous vane passes the relief groove, the next vane has already left the suction chamber. If the seal at the spline shaft end is too tight (causing overheating), adjust or replace it appropriately. If the pump speed is too high, operate at the specified speed. If the oil pump suction volume is insufficient, check the oil level. If the hydraulic oil is severely contaminated, remove the oil filter, check for damage or excessive solid adsorption, and replace the oil filter and hydraulic oil. For pressure oscillation, check the wear condition of the main pressure valve core.

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