ATOS PFE-41045/1DU vane pump (Italy) 20 available now.

Brand

ATOS/Italian Atos

ATOS Vane Pump Working Principle:

When the ATOS vane pump rotor rotates, the vanes, under the action of centrifugal force and pressurized oil, have their tips pressed tightly against the inner surface of the stator. Thus, the working volume formed by the two vanes, the rotor, and the inner surface of the stator first increases in oil intake and then decreases in oil discharge. Two oil intake and discharge cycles are completed in one rotation of the vane.

I. Working Principle of a Single-Acting Vane Pump

The ATOS vane pump consists of a rotor 1, a stator 2, vanes 3, a distribution plate, and end covers. The inner surface of the stator has cylindrical holes. There is an eccentricity between the rotor and the stator. The vanes can slide flexibly within the rotor slots. Under the centrifugal force of the rotor rotation and the pressurized oil flowing into the vane roots, the vane tips are pressed tightly against the inner surface of the stator. Thus, sealed working chambers are formed between two adjacent vanes, the distribution plate, the stator, and the rotor. When the rotor rotates counterclockwise, the vanes on the right side of the diagram extend outwards, gradually increasing the volume of the sealed working chamber and creating a vacuum. Oil is then drawn in through the suction port 6 and the window on the distribution plate 5. On the left side of the diagram, the vanes retract inwards, gradually decreasing the volume of the sealed chamber. The oil in the sealed chamber is forced out through another window on the distribution plate and the pressure port 1, and output to the system. This type of pump performs one suction and one pressure cycle per rotor revolution, hence it is called a single-acting pump. The rotor is subjected to radial hydraulic imbalance force, therefore it is also called an unbalanced pump, and its bearing load is relatively large. Changing the eccentricity between the stator and rotor changes the pump's displacement; therefore, these pumps are all variable displacement pumps.

II. Working Principle of a Double-Acting Vane Pump

The working principle of the ATOS vane pump is similar to that of a single-acting vane pump, the only difference being that the stator surface consists of eight parts: two long-radius circular arcs, two short-radius circular arcs, and four transition curves. Furthermore, the stator and rotor are concentric. When the rotor rotates clockwise as shown in the diagram, the volume of the sealed working chamber gradually increases at the upper left and lower right corners (the suction zone) and gradually decreases at the lower left and upper right corners (the pressure zone). A sealing zone separates the suction and pressure zones. With this type of pump, each sealed working chamber completes two suction and two pressure actions per rotor revolution, hence the name double-acting vane pump. The two suction and two pressure zones are radially symmetrical, and the hydraulic pressure acting on the rotor is radially balanced, therefore it is also called a balanced vane pump.

The instantaneous flow rate of a double-acting vane pump is pulsating; the pulsation rate is small when the number of vanes is a multiple of 4. Therefore, the number of vanes in a double-acting vane pump is generally 12 or 16.

Key management points for ATOS vane pumps:

In addition to preventing dry running, overload, air intake, and excessive vacuum, the following should also be noted when managing ATOS vane pumps:

1. When the pump's rotation direction changes, its suction and discharge directions also change. Vane pumps have a prescribed rotation direction and cannot be reversed. This is because the rotor vane slots are inclined, the vanes have chamfered edges, the vane bottoms communicate with the discharge chamber, and the throttling grooves and suction/discharge ports on the distribution plate are designed according to the predetermined rotation direction. Reversible vane pumps must be specially designed.

2. Vane Pump Assembly: The distribution plate and stator are correctly positioned using locating pins. The vanes, rotor, and distribution plate must not be installed backwards. The suction area on the inner surface of the stator is most prone to wear; if necessary, it can be flipped over to convert the original suction area into the discharge area for continued use.

3. Disassembly and Assembly: Ensure the working surfaces are clean. The oil should be well filtered during operation.

4. Excessive clearance in the vane slots will increase leakage; insufficient clearance will prevent the vanes from freely extending and retracting, leading to malfunction.

5. Axial clearance of the vane pump has a significant impact on ηv.

1) Small pumps: 0.015～0.03mm

2) Medium pumps: 0.02～0.045mm

6. The temperature and viscosity of the oil should generally not exceed 55℃, and the viscosity should be between 17 and 37 mm²/s. Too high a viscosity will make oil absorption difficult; too low a viscosity will result in significant leakage.

ATOS Vane Pump Stock List:

PFE-32036/3DT

PFE-41037/1DU 20

PFE-41045/1DT

PFE-41045/1DU 20

PFE-41045/1DW 20

PFE-41056/1DT

PFE-41056/1DU 20

PFE-41056/1DV 20

PFE-41056/1DW 20

PFE-41070/1DT

PFE-41070/1DV 20

PFE-41070/2DT 20

PFE-41070/2DV 20

PFE-41085/1DT 20

PFE-41085/1DW 20

PFE-42045/3DW 20

PFE-42056/3DU

20

PFE-42070/3DT

20

PFE-42070/3DU

Our company mainly deals in European and American brands and can purchase brands from any European country. For example, our advantageous German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, ROSS

British brands: Norgren

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi