| 摘要 |
The invention relates to a suction unit for mobile work equipment and devices, said equipment including a platform (1) having a rolling means supporting a vessel (3), holding the suction unit (A), an opening (B) for positioning the pipe connected to the work tool, and an air intake (4) in the median portion of the vessel, said suction unit including three vertically adjacent, assembled components (6), (7) and (8) — top, intermediate and bottom — arranged for circulating air, the bottom bowl-shaped component (8) having bore-holes (8.2) for passing air from the bottom upward, the intermediate component (7) being supported by the bottom component (8) and having a central opening (7.1) for positioning the bottom ring-shaped portion (10.1) of a motor-turbine unit (10) mounted on and attached to a supporting plate (11) secured to the intermediate plate-shaped component (7), said ring shape having openings (10.2) for passing air, the top bell-shaped component (6) being positioned above the components (7) and (8) and having, in the top end wall thereof, openings (6.1) for passing air, said component (6) defining an inside space with the component (7) for receiving the top portion (10.3) of a motor-turbine unit (10), said suction unit (A) being characterised in that the components (6), (7) and (8) define a single circuit (CC) for circulating air, performing the dual function of air suction and of ventilating and cooling the motor-turbine unit; in that the components (7) and (8) are assembled with a sealed peripheral link (16); in that the intermediate plate of the component (7) defines a passage (15) with the circular supporting plate (11), supporting the motor-turbine unit; in that the suctioned air, drawn via the air intake (4) formed on the vessel, crosses the filtering system (9), passes into the bottom portion of the motor-turbine block consisting of the ring-shaped portion (10.1), and then passes into the passage openings (15) guiding the air into the inside space defined by the bell-shaped component (6) and the component (7), thus ensuring the ventilation of the motor-turbine unit; in that the air is discharged via the openings (17) formed in the top portion of the bell; and in that the motor-turbine unit is a high-frequency or brushless motor. |
