TH99290A - Rotary pump, especially for dishwashers or washing machines. - Google Patents

Abstract

In a DC60 rotary pump with a synchronous electric motor (2), the rotor (8) and the output shaft (9) of the electric motor (2) and the impeller (10) of the rotary pump are connected angularly to each other by a viscous coupling (13,20) which is defined by a viscous fluid inserted between two coaxial linkage assemblies (5,8;11,17), one of which has at least one directional flow assembly (15) to resist the flow of the viscous fluid in different directions of rotation of the impeller (10). At least one flow (15) for the flow resistance of different viscous fluids in two directions of rotation of the impeller (10).

Claims (10)

1. A rotary pump, especially for dishwashers and washing machines, consists of an impeller (10), a synchronous electric motor (2) to power the impeller (10), an electric motor (2) with a stator (3), a rotor (8) with an output shaft (9) mounted to rotate around its longitudinal axis (4), and a first linkage for connecting the rotor (8) and the output shaft (9) together in an angular fixed manner, and a second linkage for connecting the output shaft (9) and the impeller (10) together in an angular fixed manner. At least one linkage consists of a viscous coupling (13;20) which in kind consists of two linkage assemblies (5,8;11,17) that are connected in a rotating manner, and a viscous fluid for locking the linkage assemblies (5,8;11,17) together angularly when the linkage assemblies (5, 8; 11, 17) are rotated relative to each other. Rotary pumps are characterized by the viscous coupling (13;20) also containing at least one flow-directing assembly (15) to resist the flow of different viscous fluids in two directions of rotation around such axis (4). 2. A rotary pump as in claim 1, in which the viscous coupling (13;20) consists of the flow-directing assembly (15) as described above, spaced around the axis (4) as described above. 3. The rotating pump as in claim 2, in which the flow direction components (15) are spaced equally around the axis (4) as mentioned. 4. A rotary pump, as described in one of the preceding claims, in which the connecting elements (5,8;11,17) define between them a channel (14;19) filled with a viscous fluid, each element facing the flow direction (15) protruding into the channel (14;19) from one connecting element (5,8; 11,17). 5. A rotary pump as in claim 4, in which all flow-direction assemblies (15) protrude into channels (14;19) from the same connecting assemblies (5,8;11,17). 6. The pump rotates as in claim 4, in which the assembly turns the flow direction (15), some pieces protrude into channels (14;19) from one linking assembly (5;11) and some pieces from another linking assembly (8;17). 7. A rotating pump as in any of claims 4 through 6, where the first linkage (5;11) extends around the second linkage (8;17), each flow-direction (15) extending into a channel (14;19) from the first linkage (5;11). 8. A rotating pump as in any of the preceding claims, in which the flow direction is oriented (15), each assembly consists of teeth (16) that form an angle off-center relative to the axial plane (4). 9. A rotary pump as in any of the preceding claims, in which the rotor (8) and the power-out plate (9) are connected by an angular static connection and a second linkage is made up of a viscous coupling (20). 10. Any rotary pump as in any of the claims 1 through 8, in which the output shaft (9) and the impeller (10) are connected by an angular static connection and the first linkage consists of a viscous coupling (13).