Discharge pump

Technical Field

The invention relates to a drainage pump, in particular relates to a household washing a spare drain pump.

Background Art

With the improvement of people's living standard, washing machine, dishwasher and other household washing apparatus (washing machine, dishwasher) has gradually into the thousands of households. The drain pump (  pump drain) a washing machine, dish washing machine in one of the elements of the utmost importance. The drain pump can be divided into three stages: start-up phase, full drainage stage, air and water mixing stage. The air and water mixing stage, as most of the water has basically been discharged, only a small amount of water is mixed with the air in the mixed fluid, therefore, the drain pump, at this stage, a large noise is generated. With continuous to the requirements of environmental protection, has been noise of the drain pump is reduced since the problem of people expect to solve.

The invention aims at providing a drainage pump of the noise can be effectively reduced.

Content of the invention

In order to solve the above technical problem, the present invention provides a drainage pump, comprising a pump section and drive portion, the states the pump department the pump comprises a volute and an impeller, said drive part includes a rotor and a stator, the surrounding shell includes an inlet, outlet and inlet and the exporting country is communicated with the chamber, said rotor including a rotating shaft, the impeller is fixedly mounted to one end of the rotating shaft and located in the cavity chamber of the turbine, because the eddy shell of the joint between the outlet of the chamber is provided with a turning part, so that the scroll outlet is lower than the center of the center of the whorl shell cavity room.

Preferably, shell states the whorlwhorl shell cavity room outlet is lower than the top surface of the center.

Preferably, said inlet is deviated from the central line of the center line of the impeller.

Preferably, the impeller is arranged in the center of the chamber, the joint of the inlet and the chamber is provided with a turning part, so that the inlet is deviated from the center line of the center line of the impeller.

Preferably, the impeller is arranged in the center of the chamber, because the eddy shell the inlet and the opening of the chamber is directly connected, the opening of the cavity deviates from the center line of the chamber, so that the inlet is deviated from the center line of the center line of the impeller.

Preferably, the rotor also comprises a cylindrical magnet, the magnet is fixed in the rotating shaft, the stator includes a mounting mechanism, the mounting mechanism includes a mounting plate fixed to the housing and one side of the mounting plate of the hollow cylinder, the magnet is contained in the cylinder, said stator also includes is mounted to stator chip on the external side of the cylinder, on the chip of the stator is wound with a winding, can be energized with a rotor magnet interaction.

Preferably, the two ends of the rotating shaft through the bearing are respectively mounted to the mounting plate and away from the cylinder end of the mounting plate.

Preferably, close to the bearing of the mounting plates by the sealing ring and the mounting frame is mounted to the mounting plate, the seal ring can prevent the water in the pump to enter the drive part along the rotating shaft.

Preferably, the impeller includes a hub and a plurality of from the outer surface of the hub blades extending radially, the rotating shaft is connected with the wheel hub through a shaft coupling, the shaft coupling comprises fixed to the rotating shaft at one end of the sleeve, is located in the outer wall of the sleeve of a ball bearing between the inner wall of the wheel hub, the outer wall of the sleeve is provided with a drive tooth, driven tooth is arranged on the inner wall of the impeller, the ball can be driven by the driving gear so as to drive the impeller along with from the rotating shaft, the sleeve away from the outer wall of the inner wall of a hub installed with ball bearing place between an elastic ring.

Preferably, states the whorl shell turning part is also provided with a guide device, the guide device comprises a ship, the ship substantially parallel to the inclined plane of the turning section, the flow-guiding device is provided with a water outlet, the guide device is also provided with a locating hole of the locating block on the volute chamber will be thus states the whorl shell the diversion device is located in the turning part.

The example embodiment of the present invention has the advantages that: the outlet and the chamber is provided with turning part, so that the outlet is lower than the center of the center of the whorl shell cavity room , preferably, the outlet is lower than the top surface of the center of the whorl shell cavity room. In this way, the air and water mixing stage, the water at the outlet of the air in the chamber can be sealed in the chamber and prevented from flowing out through the outlet thereof, the air and water so as to reduce the noise of the mixing stage of; the center line of the scroll inlet is deviated from the center line of the impeller, can further improve the effect of the turbulent flow of the fluid, reducing the noise of the drainage pump; the outer wall of the bushing away from the between the inner wall of a hub ball bearing place installed with an elastic ring, the rotation of the impeller can be prevented, thereby reducing vibration, reducing noise.

Description of drawings

Figure 1 of the present invention shown with a three-dimensional of the drain pump of the embodiment of a structure diagram;

Fig. 2 shown a of this invention a cross-sectional view of the drain pump of the embodiment;

Figure 3 is shown an embodiment of the invention the drainage a structure diagram of a three-dimensional turbine housing;

Figure 4 a of the invention shown of the drain pump of the embodiment of the scroll under the using state viewed in the direction from the inlet to a structure diagram of the plane;

Figure 5 is shown an embodiment of the invention the drainage whorl shell in another angle of the stereo a structure diagram;

Figure 6 is shown an embodiment of the invention the drainage a structure diagram of a three-dimensional of the guiding device;

Figure 7 is shown an embodiment of the invention the drainage of the other flow guide device of a structure diagram of a three-dimensional angle;

Figure 8 shown an embodiment of the present invention of a structure diagram of a three-dimensional of the impeller pump;

Figure 9 is shown another embodiment of the present invention a structure diagram of a three-dimensional of the drain pump;

Fig. 10 is shown another embodiment of the present invention discharge pump in another angle of the stereo a structure diagram.

Mode of execution

In order to of the present invention the wanted solve the technical problems, the technical proposal and beneficial effect is more clear, the following binding with photos and embodiment, the further detailed description of the invention. It should be understood, the specific embodiment described in order to explain the invention only, is not used to limit the invention.

As shown in Figure 1 and Figure 2 shows, an embodiment of the invention the drain pump 10 includes a pump section 20 and drive portion 50. The states the pump department 20 the pump comprises a volute 30 and set of the impeller housing 40.

Please also refer to Figure 3 and Figure 4, states the whorl shell 30 includes an inlet 32, outlet 34, and the inlet 32 and outlet 34 communicated with the chamber 36, the inlet 32 and the outlet 34 are respectively positioned in the two mutually perpendicular in the plane of, the inlet 32 is located in the chamber 36 in a plane parallel to the axial line, the outlet 34 is located in the chamber 36 in a plane perpendicular to the axis. The impeller 40 containing yu Woke 30 chamber 36 the inner, impeller 40 the central axis X2 with the chamber 36 of the central axis line, in other words: the impeller 40 is located in chamber 36 at the central position.

The outlet 34 and the chamber 36 is provided with a turning section, and the connection 38, turning part 38 with whorl shell cavity room the two ends of the 36 and outlet 34 are respectively provided with a turning position of the joint of the. Please refer to Figure 4, Figure 4 to the position shown in position under normal use state. Turning part 38 is arranged, the outlet 34 at the center of the horizontal plane of the lower than A whorl shell cavity room 36 at the center of the horizontal plane of the B, preferably, the outlet 34 of the top surface of lower than C whorl shell cavity room 36 at the center of the plane of the the B. In this way, the air and water mixing stage, the outlet 34 may be the storage chamber 36 of the air sealed in the chamber 36 and prevent its through the outlet port 34 to flow out, the air and water so as to reduce the noise of the mixing stage. Preferably, the inlet 32 and the chamber 36 can be provided also at the joint of a turning part 39, so that the inlet 32 the centerline X1 deviate from the chamber 36 the central line, in other words the inlet 32 the centerline X1 deviate from the impeller 40 the central line X2, so that it is possible to improve the effect of turbulent flow of the fluid, reducing the drain pump 10 the noise.

Please refer to Figure 2 and Figure 5 to fig. 7, because the eddy shell 30 a turning part 39 is also provided with an a flow guiding device 95, the diversion device 95 comprises saving 96, the saving 96 and the turning part 39 substantially parallel to the inclined surface of the, so that the turning part 39 center and the inlet 32 the central line X1 and the center line of the impeller X2 connection to be exactly positioned in the crosspoint, so as to maintain the continuity of the fluid center. The diversion device 95 is provided with a water drain port (drain   hole) 97, is used for discharging the accumulated water. The diversion device 95 is also provided with a positioning hole 98, with the volute 30 the positioning block 37 of the guiding device to 95 states the whorl shell positioning for 30 a turning part 39 the inner.

Please refer to fig. 2, the drive unit 50 comprises a rotor and a stator.

The rotor comprises a rotating shaft 62 in the fixed sleeve and a rotating shaft 62 of the cylindrical magnet 64.

The stator includes a mounting mechanism, the mounting mechanism comprises a hollow cylinder 72 is used for accommodating the rotating shaft 62 and the magnet 64 in its interior, and is located in cylinder 72 on one end of the mounting plate 74, the mounting plate 74 is provided with a mounting hole, for passing through the screws and locking to the housing 30, so that the pump section 20 with a drive section 50 are fixed together. The rotating shaft 62 through the bearing the two ends of the 56 are respectively mounted to the mounting plate 74 and the cylinder 72 far away from the mounting plate 74 of the end. The rotating shaft 62 through the one end of the mounting plate 74, through the coupling 80 and the impeller 40 is connected, the coupling 80 for the detailed structure of the reference the Company's U.S. patents discloses section 2008/0080987 of, the content of the Patent disclosed the introduction of the in this Patent application. The coupling 80 comprises a fixed mounting to the rotating shaft 62 at the end of the sleeve 82, positioned in the sleeve 82 and the impeller 40 hub 42 between the inner wall of the ball 84, the sleeve 82 is provided with a radially extending drive teeth, the hub 42 is provided with a radially extending driven tooth the inner wall, is the driving gear and the driven the toothing located in the same plane, the radial clearance between the two. The rotating shaft 62 is rotated, the drive tooth through the ball 84 drive from the gear motion so as to drive the impeller 40 rotation. The hub 42 far away from the blade 44 of the inner side of the tail end is provided with a ring-shaped groove, the end cover of a week sideband flange 85 is fixed to the hub 42 of the end, said end cover 85 into the flange of the annular groove, thus can prevent the coupling 80 from hub 42 slide in. Optionally, states the end cover 85 and the sleeve 82 biasing spring can be arranged between the. The sleeve 82 and the outer wall of the hub 42 between the inner wall away from the ball 84 is provided with an elastic ring 86, for preventing the impeller 40 during the rotation of the swing, so as to reduce vibration. Close to the mounting plate 74 of the bearing at 56 through the sealing ring 88 and the mounting frame 90 is mounted to the mounting plate 74, the seal ring 88 preventably pump section 20 along the rotating shaft in the water 62 to enter the drive part 50 the inner.

The stator also includes a plurality of is mounted on the mounting mechanism of the hollow cylinder 72 the stator chip and the outer side of the 76, the chip 76 is wound with winding, the winding is energized with a rotor magnet 64 interact to drive the rotor to rotate, winding the outer seal with a sealing frame 78, sealing frame 78 by the buckle structure is fixed to the mounting plate 74.

Please refer to Figure 8, the impeller 40 includes a bottom plate 41, hub 42 and a plurality of the hub 42 along the radially extending outer surface of the blade 44. Preferably, the hub 42 is a conical, smooth outer surface of the same slope. The blade 44 is four, a mutual 90 degree angle interval.

Figure 9 and Figure 10 is shown in another embodiment of the present invention a structure diagram of a three-dimensional of the drain pump, said another embodiment of the structure of the drain pump of the aforesaid embodiment in addition to the structure of the drain pump of the scroll 30 substantially the same as the entrance.

Please refer to Figure 9 and Figure 10, alternatively, states the whorl shell 30 inlet 32 can also be with the chamber 36 directly connected, that is, inlet 32 directly combined with a chamber 36 opening, the inlet 32 and the chamber 36 of the coaxial opening, the chamber 36 of the openings from the chamber 36 the center, therefore, the inlet 32 is deviated from the center line of chamber 36 of the center line, thus that the inlet 32 is located in the center is deviated from the chamber 36 the central location of the impeller 40 the center, this kind of design, may also improve the turbulent flow effect of the fluid, reducing the drain pump 10 noise, in particular gas and the mixture of the water phase of the noise.

Drainage pump of this invention can be used for washing machine, various household dishwasher washing apparatus (washing machine.dishwasher).

For this invention the stated above the better practical example , is not used to limit the invention, where in the present invention within the spirit and principle of the any modifications made by the, equivalent replacement and improved, and the like, shall be included in the scope of protection of this invention.