CN209743233U - semi-closed impeller and have its drain pump - Google Patents

Abstract

the utility model discloses a semi-enclosed impeller and a drainage pump with the same, which comprises a shaft sleeve and an impeller body, wherein the shaft sleeve comprises a sleeve and a seat plate which are coaxially arranged and the end surfaces of which are connected, and a plurality of hot melting columns are arranged at the edge of one end of the seat plate close to the sleeve; the impeller body comprises a cover plate and a plurality of main blades positioned at one end of the cover plate; the main blades radially extend from the center to the edge of the cover plate and are uniformly arranged around the center of the cover plate in the circumferential direction; a groove suitable for placing the shaft sleeve is formed in the center of the other end of the cover plate, and hot-melting welding holes corresponding to the hot-melting columns one to one are formed in the groove; the hot melting column is inserted into the hot melting welding hole, and the impeller body and the shaft sleeve are fixedly connected with the hot melting welding hole through the hot melting column in a hot melting welding mode. Semi-enclosed impeller and drain pump, bearing assembly location installation is accurate, grease leakage phenomenon can not appear, and the lift of drain pump is higher, work efficiency improves.

Description

Semi-closed impeller and have its drain pump

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a semi-enclosed impeller and have its drain pump.

Background

At present, for example, in household electrical appliances such as washing machines and dishwashers, a rotor assembly with a semi-enclosed impeller is assembled with a motor casing in a manner that the impeller presses a lower bearing seat, the lower bearing seat is one of components of a bearing assembly, as shown in fig. 1, the rotor assembly comprises a rotor shaft, a rotor sleeved on the rotor shaft and the bearing assembly, and the bearing assembly comprises a lower bearing, a sealing ring and a lower bearing seat which are sequentially sleeved on the rotor shaft. Because bearing assembly is connected with rotor chamber interference fit, do not have the cooperation structure between impeller and the step, therefore lead to the step assembly skew easily when roof pressure step, the sealing washer distortion, because the impeller size is great, can't see whether the bearing assembly is installed in place, if install not in place, will lead to motor casing rotor intracavity grease to leak, increase the energy consumption, reduce the work efficiency of pump, consequently need design one kind can accurately install the bearing assembly in place, avoid the drain pump structure of rotor intracavity grease leakage.

SUMMERY OF THE UTILITY MODEL

the to-be-solved technical problem of the utility model is: appear the step assembly when rotor subassembly of drain pump among the prior art and motor casing assembly crooked easily, the sealing washer distortion leads to the technical problem that grease leaked in the motor casing rotor cavity, the utility model provides a semi-enclosed impeller and have its drain pump and solve above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a semi-enclosed impeller comprises a shaft sleeve, wherein the shaft sleeve comprises a sleeve and a seat plate which are coaxially arranged and are connected in end face, shaft holes are formed in the centers of the sleeve and the seat plate, and a plurality of hot melting columns are arranged at the edge of one end, close to the seat plate, of the sleeve; the impeller comprises an impeller body, a blade and a blade support, wherein the impeller body comprises a cover plate and a plurality of main blades positioned at one end of the cover plate; the main blades radially extend from the center to the edge of the cover plate and are uniformly arranged around the center of the cover plate in the circumferential direction; a groove suitable for placing the shaft sleeve is formed in the center of the other end of the cover plate, and hot-melting welding holes corresponding to the hot-melting columns one to one are formed in the groove; the impeller comprises a shaft sleeve, a groove, a hot-melt column, an impeller body and a hot-melt welding hole, wherein one end of the shaft sleeve is provided with a sleeve, the groove is oppositely arranged, the hot-melt column is inserted into the hot-melt welding hole, and the impeller body and the shaft sleeve are fixedly connected through the hot-melt column and the hot-melt welding hole in a hot-.

Furthermore, a plurality of positioning lugs are circumferentially arranged at one end, close to the seat plate, of the sleeve, and the positioning lugs are attached to the outer side wall of the sleeve; notches which are in one-to-one correspondence with the positioning lugs are arranged in the grooves.

Preferably, the number of the hot-melt welding holes is 3-6, and the hot-melt welding holes are uniformly distributed on the same circumference.

Further, a plurality of pressure relief holes are uniformly arranged in the circumferential direction on the cover plate, the distance from the pressure relief holes to the circle center of the impeller body is D, the diameter of the cover plate is B, and then

Preferably, the number of the pressure relief holes is 4-10.

Furthermore, one end of the cover plate, far away from the main blade, is provided with an annular bulge and a plurality of auxiliary blades which are uniformly arranged in the circumferential direction, and the auxiliary blades are positioned between the outer edge of the cover plate and the annular bulge.

Preferably, at least one end of the secondary blade is connected to the annular protrusion or the outer edge of the cover plate.

Preferably, the number of the auxiliary blades is 4-12.

Preferably, the length E of the auxiliary blade is 1-5 mm, and the width F of the auxiliary blade is 1-3 mm.

The utility model also provides a drain pump, including the motor casing, fix the stator in the motor casing, the motor casing is equipped with the rotor chamber, is equipped with the rotor that has the rotor shaft in the rotor chamber, is located rotor one end the cover be equipped with on the rotor shaft with rotor chamber interference fit's bearing assembly is close to bearing assembly the rotor shaft end fixing have more than semi-enclosed impeller, the roof pressure the axle sleeve is impressed rotor and bearing assembly the rotor intracavity, then sheathe impeller body in the axle sleeve again.

The utility model has the advantages that:

(1) Semi-enclosed impeller contain split type axle sleeve and impeller body, through the less axle sleeve of size with bearing assembly top pressure in advance at the rotor cavity, guarantee that step and sealing washer installation target in place, adopt hot melt mode fixed connection with impeller body and axle sleeve again, fixed effectual, and the hot melt can not exert an influence to the epaxial all the other part position relations of rotor when fixed.

(2) Semi-enclosed impeller on the axle sleeve on be equipped with the location lug, when impeller body installs on the rotor shaft, the location lug can make axle sleeve and impeller body tentatively laminate the location, produces axial clearance or circumference and rocks when avoiding the hot melt to fix between impeller body and the axle sleeve.

(3) Semi-enclosed impeller still be provided with the auxiliary vane, make impeller body both ends all form the vortex disturbance through setting up the auxiliary vane to can improve the axial force size that impeller body received, avoid the phenomenon of rotor axis drunkenness, and improve the pumping lift.

(4) Drain pump, bearing assembly location installation is accurate, grease leakage phenomenon can not appear, and the lift of drain pump is higher, work efficiency improves.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is an exploded schematic view of a prior art rotor assembly;

FIG. 2 is an exploded schematic view of an embodiment of the present invention showing a drain pump with a semi-enclosed impeller;

Fig. 3 is a perspective view of a shaft sleeve of an embodiment of the semi-enclosed impeller of the present invention;

FIG. 4 is a front view of the shaft sleeve of an embodiment of the semi-enclosed impeller of the present invention;

Fig. 5 is a front perspective view of an impeller body of an embodiment of a semi-enclosed impeller in accordance with the present invention;

Fig. 6 is a front view (viewed from the front) of an impeller body of an embodiment of a semi-enclosed impeller according to the present invention;

Fig. 7 is a back perspective view of an impeller body of embodiment 4 of the semi-enclosed impeller according to the present invention;

Fig. 8 is a back perspective view of the impeller body of embodiment 5 of the semi-enclosed impeller according to the present invention;

Fig. 9 is a back perspective view of the impeller body of embodiment 6 of the semi-enclosed impeller of the present invention;

Fig. 10 is a front view (from the back) of the impeller body of the semi-enclosed impeller embodiment of the present invention.

In the figure, 1, a shaft sleeve, 11, a sleeve, 12, a seat plate, 13, a shaft hole, 14, a hot melting column, 15, a positioning lug, 16, a clamping groove, 2, an impeller body, 21, a cover plate, 22, a main blade, 23, an auxiliary blade, 24, a groove, 241, a hot melting welding hole, 242, a notch, 243, a protrusion clamping block, 25, a pressure relief hole, 26, an annular protrusion, 3, a motor shell, 31, a rotor cavity, 4, a stator, 5, a rotor assembly, 6, a rotor, 7, a rotor shaft, 8, a bearing assembly, 81, a lower bearing, 82, a sealing ring, 83, a lower bearing seat, 9, an insulating cover, 10 and a magnetic ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

as shown in fig. 3-10, a semi-enclosed impeller includes a shaft sleeve 1, the shaft sleeve 1 includes a sleeve 11 and a seat plate 12 which are coaxially arranged and connected with each other at end faces, a shaft hole 13 is provided at the center of the sleeve 11 and the seat plate 12, the shaft hole 13 is used for sleeving a rotor shaft 7, the seat plate 12 is attached to the end of a bearing assembly 8, the bearing assembly 8 is pressed, the sleeve 11 can increase the contact area between the shaft sleeve 1 and the rotor shaft 7, the shaking of the sleeve 11 is reduced, the sleeve 11 can extend the axial dimension of the shaft sleeve 1 to facilitate the pressing operation, and a plurality of hot melting columns 14 are arranged at the edge of one end of the seat plate 12; the impeller comprises an impeller body 2, wherein the impeller body 2 comprises a cover plate 21 and a plurality of main blades 22 positioned at one end of the cover plate 21; the end of the main blade 22 is the inlet end of the drainage pump, and the main blade 22 extends radially from the center to the edge of the cover plate 21 and is uniformly arranged around the center of the cover plate 21 in the circumferential direction; a groove 24 suitable for placing the shaft sleeve 1 is formed in the center of the other end of the cover plate 21, and hot-melt welding holes 241 corresponding to the hot-melt columns 14 one by one are formed in the groove 24; one end of the shaft sleeve 1 provided with the sleeve 11 is arranged opposite to the groove 24, the hot melting column 14 is inserted into the hot melting welding hole 241, and the impeller body 2 and the shaft sleeve 1 are fixedly connected with the hot melting welding hole 241 through the hot melting column 14 in a hot melting welding mode.

A drainage pump is shown in figure 2 and comprises a motor shell 3 and a stator 4 fixed in the motor shell 3, wherein a rotor cavity 31 is formed in the motor shell 3, a rotor 6 with a rotor shaft 7 is arranged in the rotor cavity 31, a bearing assembly 8 in interference fit with the rotor cavity 31 is sleeved on the rotor shaft 7 located at one end of the rotor 6, a semi-closed impeller is fixed at the end part of the rotor shaft 7 close to the bearing assembly 8, the rotor 6 and the bearing assembly 8 are pressed into the rotor cavity 31 by a jacking shaft sleeve 1, and then an impeller body 2 is sleeved on the shaft sleeve 1.

During the assembly, fix the tip at rotor shaft 7 with axle sleeve 1 earlier, can connect shaft hole 13 and rotor shaft 7 key-type or threaded connection of axle sleeve 1, also can be with axle sleeve 1 and rotor shaft 7 welded fastening, then roof pressure axle sleeve 1 impresses rotor 6 and bearing assembly 8 in rotor cavity 31, bearing assembly 8 is connected with rotor cavity 31 interference fit, then overlap impeller body 2 on axle sleeve 1, weld with axle sleeve 1 through the mode of hot melt welding, the bearing frame skew that the roof pressure impeller brought with assembly rotor 6 after having avoided fixing the impeller on rotor shaft 7 earlier, the problem of sealing washer distortion.

Embodiment 1, as shown in fig. 3 to 6, a semi-enclosed impeller comprises a shaft sleeve 1, the shaft sleeve 1 comprises a sleeve 11 and a seat plate 12 which are coaxially arranged and have end surfaces connected, a shaft hole 13 is arranged in the center of the sleeve 11 and the seat plate 12, four hot-melting posts 14 are arranged at the edge of one end of the seat plate 12 close to the sleeve 11, and the hot-melting posts 14 are uniformly arranged around the circumference of the central shaft of the seat plate 12; the impeller comprises an impeller body 2, wherein the impeller body 2 comprises a cover plate 21 and four main blades 22 positioned at one end of the cover plate 21; the end of the main blade 22 is the inlet end of the drainage pump, and the main blade 22 extends radially from the center to the edge of the cover plate 21 and is uniformly arranged around the center of the cover plate 21 in the circumferential direction; a groove 24 suitable for placing the shaft sleeve 1 is formed in the center of the other end of the cover plate 21, and hot-melt welding holes 241 corresponding to the hot-melt columns 14 one by one are formed in the groove 24; one end of the shaft sleeve 1 provided with the sleeve 11 is arranged opposite to the groove 24, the hot melting column 14 is inserted into the hot melting welding hole 241, and the impeller body 2 and the shaft sleeve 1 are fixedly connected with the hot melting welding hole 241 through the hot melting column 14 in a hot melting welding mode. Shaft sleeve 1 and impeller body 2 all adopt the plastics material to make, and hot melt only need when fixed with hot melt post 14 heating melt can, can not produce structural vibration, also can not be because of the phenomenon that 11 undersize of sleeve produce the alignment location difficulty.

the utility model provides a drain pump, includes motor casing 3, fixes stator 4 in motor casing 3, and 3 outsides of motor casing set up insulating boot 9, and motor casing 3 is equipped with rotor chamber 31, and stator 4 is located rotor chamber 31 outsidely, is equipped with rotor 6 that has rotor shaft 7 in the rotor chamber 31, is located rotor 6 one end the cover is equipped with bearing assembly 8 with 31 interference fit in rotor chamber on the rotor shaft 7, and 7 end fixing of rotor shaft that are close to bearing assembly 8 have above semi-enclosed impeller, top pressure axle sleeve 1 impresses rotor 6 and bearing assembly 8 in the rotor chamber 31, then fixes impeller body 2 cover hot melt on axle sleeve 1 again.

In order to satisfy that the peeling strength between the shaft sleeve 1 and the impeller is enough, 3-6 hot melting columns 14 are required to be arranged. The preferred diameter dimensions of the heat stake posts 14 are: 0.5-3 mm. Considering the problem of mold forming, the aperture of the hot-melt welding hole 241 on the impeller body 2 is not too small and needs to be more than 0.5 mm. Considering the weldability, the hot melting column 14 is not too large and needs to be less than 3 mm.

Embodiment 2, in embodiment 1, when the impeller body 2 is sleeved on the shaft sleeve 1, only the hot-melt column 14 and the hot-melt welding hole 241 are matched for preliminary positioning, but since the diameter of the hot-melt welding hole 241 is often slightly larger than that of the hot-melt column 14, when the impeller body 2 is sleeved on the shaft sleeve 1, circumferential shaking or axial movement is easily generated, and the impeller body 2 needs to be pressed to ensure tight connection between the impeller body 2 and the shaft sleeve 1, as shown in fig. 3, 4, and 7-10, in this embodiment, on the basis of embodiment 1, a plurality of positioning protrusions 15 are circumferentially arranged at one end of the seat plate 12 close to the sleeve 11, and the positioning protrusions 15 are arranged in a manner of being attached to the outer side wall of the sleeve 11; be equipped with in the recess 24 with the notch 242 of positioning lug 15 one-to-one, positioning lug 15 is the notch cuttype structure, and positioning lug 15's top has the special-shaped apex angle, and simultaneously, form protruding fixture block 243 between the adjacent notch 242 on impeller body 2, on sleeve 11 between the adjacent positioning lug 15 form with draw-in groove 16 that protruding fixture block 243 corresponds, when impeller body 2 overlaps on axle sleeve 1, protruding fixture block 243 inserts in draw-in groove 16, in positioning lug 15 inserts notch 242, in the special-shaped apex angle at positioning lug 15 top inserted notch 242 completely, made impeller body 2 closely laminate with axle sleeve 1, realized preliminary location.

Embodiment 3, on the basis of embodiment 1 or embodiment 2, as shown in fig. 5 to 10, a plurality of pressure relief holes 25 are uniformly arranged in the circumferential direction of the cover plate 21, the distance from the pressure relief hole 25 to the center of the impeller body 2 is D, and the diameter of the cover plate 21 is B, so that the pressure difference between the two ends of the impeller cover plate 21 is reduced by the pressure relief holes 25, and forward movement of the semi-closed impeller is avoided. The number of the pressure relief holes 25 is usually 4 to 10.

The preferred diameter dimensions of the pressure relief hole 25 are: 0.5 mm-2 mm. Considering the problem of mold forming, the aperture of the pressure relief hole 25 should not be too small, and needs to be more than 0.5 mm.

In embodiment 4, due to the structural difference between the two ends of the impeller body 2, the difference between the liquid flowing conditions at the two ends of the impeller body 2 is large, so that a pressure difference is formed between the two ends of the impeller body 2, and therefore, the impeller body 2 is subjected to an axial force, the disturbance of the liquid flow at the end of the impeller body 2 provided with the main blades 22 is large, and the pressure is small, so that the impeller body 2 is subjected to an axial force towards the inlet of the drain pump (i.e., the end of the main blade 22), when a certain axial displacement is generated between the impeller and the rotor shaft 7, the rotor 6 is caused to move in a transition manner, so that the magnetic ring 10 and the bearing assembly 8 rub against each other, and generate. As shown in fig. 7, in this embodiment, on the basis of embodiment 1, embodiment 2, or embodiment 3, an annular protrusion 26 and eight circumferentially and uniformly arranged secondary blades 23 are provided at one end of the cover plate 21 away from the primary blade 22, the secondary blades 23 are located between the outer edge of the cover plate 21 and the annular protrusion 26, two ends of the secondary blades 23 are respectively connected with the outer edge of the cover plate 21 and the annular protrusion 26, and the annular protrusion 26 covers the outside of the bearing assembly 8, so as to increase the isolation effect between the inside of the motor and the outside liquid flow. The auxiliary blades 23 can reduce the pressure difference between the two ends of the cover plate 21, and reduce the axial force applied to the impeller body 2.

Embodiment 5 differs from embodiment 4 in that, as shown in fig. 8, the sub-blade 23 is connected at one end to the outer edge of the shroud 21 and at the other end to the annular projection 26.

Embodiment 6 differs from embodiment 4 in that, as shown in fig. 9, the secondary blade 23 is connected at one end to the annular projection 26 and at the other end to the outer edge of the cover plate 21.

Table 1 shows the test data of the drainage pump structures of examples 4 to 6, wherein the length E of the auxiliary blade 23 is 1 to 5mm and the width F is 1 to 3 mm.

TABLE 1

it can be seen from table 1 that different positions of the auxiliary blades 23 have certain influence on the stress of the impeller and the pump efficiency, wherein the axial pressure of the impeller structure corresponding to embodiment 5 is 7.6N, which does not cause excessive movement of the rotor 6, friction between the magnetic ring and the bearing, noise generation, and the like.

To sum up, drain pump, bearing assembly 8 location installation is accurate, grease leakage phenomenon can not appear, and the lift of drain pump is higher, work efficiency improves.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

in light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A semi-enclosed impeller, comprising:

The heat-insulation seat plate comprises a shaft sleeve (1), wherein the shaft sleeve (1) comprises a sleeve (11) and a seat plate (12) which are coaxially arranged and are connected in an end face mode, the centers of the sleeve (11) and the seat plate (12) are provided with shaft holes (13), and the edge of one end, close to the seat plate (12), of the sleeve (11) is provided with a plurality of hot melting columns (14);

An impeller body (2), the impeller body (2) comprising a shroud (21) and a plurality of main blades (22) located at one end of the shroud (21); the main blades (22) radially extend from the center to the edge of the cover plate (21) and are uniformly arranged around the center of the cover plate (21) in the circumferential direction; a groove (24) suitable for placing the shaft sleeve (1) is formed in the center of the other end of the cover plate (21), and hot-melt welding holes (241) corresponding to the hot-melt columns (14) one by one are formed in the groove (24);

One end of the shaft sleeve (1) provided with the sleeve (11) is opposite to the groove (24), the hot melting column (14) is inserted into the hot melting welding hole (241), and the impeller body (2) and the shaft sleeve (1) are fixedly connected with the hot melting welding hole (241) through the hot melting column (14) in a hot melting welding mode.

2. the semi-enclosed impeller of claim 1, wherein: a plurality of positioning lugs (15) are circumferentially arranged at one end of the seat plate (12) close to the sleeve (11), and the positioning lugs (15) are arranged in a manner of being attached to the outer side wall of the sleeve (11); notches (242) which correspond to the positioning lugs (15) one to one are arranged in the groove (24).

3. The semi-enclosed impeller of claim 1, wherein: the number of the hot-melt welding holes (241) is 3-6, and the hot-melt welding holes are uniformly distributed on the same circumference.

4. the semi-enclosed impeller of claim 1, wherein: a plurality of pressure relief holes (25) are uniformly arranged in the circumferential direction on the cover plate (21), the distance from the pressure relief holes (25) to the circle center of the impeller body (2) is D, and the diameter of the cover plate (21) is B, so that

5. The semi-enclosed impeller of claim 4, wherein: the number of the pressure relief holes (25) is 4-10.

6. The semi-enclosed impeller of claim 1, wherein: one end, far away from the main blade (22), of the cover plate (21) is provided with an annular bulge (26) and a plurality of auxiliary blades (23) which are uniformly arranged in the circumferential direction, and the auxiliary blades (23) are located between the outer edge of the cover plate (21) and the annular bulge (26).

7. The semi-enclosed impeller of claim 6, wherein: at least one end of the auxiliary blade (23) is connected with the annular bulge (26) or the outer edge of the cover plate (21).

8. the semi-enclosed impeller of claim 7, wherein: the number of the auxiliary blades (23) is 4-12.

9. The semi-enclosed impeller of claim 8, wherein: the length E of the auxiliary blade (23) is 1-5 mm, and the width F of the auxiliary blade is 1-3 mm.

10. a drain pump, characterized by: the semi-closed impeller is characterized by comprising a motor shell (3) and a stator (4) fixed in the motor shell (3), wherein a rotor cavity (31) is formed in the motor shell (3), a rotor (6) with a rotor shaft (7) is arranged in the rotor cavity (31), a bearing assembly (8) in interference fit with the rotor cavity (31) is sleeved on the rotor shaft (7) located at one end of the rotor (6), the semi-closed impeller according to any one of claims 1 to 9 is fixed at the end part of the rotor shaft (7) close to the bearing assembly (8), the semi-closed impeller is pressed into the rotor cavity (31) by pressing the shaft sleeve (1) to press the rotor (6) and the bearing assembly (8), and then the impeller body (2) is sleeved on the shaft sleeve (1).