CN217926415U

CN217926415U - Impeller subassembly and contain its circulating pump

Info

Publication number: CN217926415U
Application number: CN202222123084.0U
Authority: CN
Inventors: 陈旭辉; 张海波
Original assignee: Changzhou Leili Motor Science & Technology Co ltd
Current assignee: Changzhou Leili Motor Science & Technology Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-11-29
Anticipated expiration: 2032-08-12

Abstract

The utility model discloses an impeller subassembly and contain its circulating pump, including axial butt joint cooperation and form impeller cavity's impeller lid and impeller seat between the two, be located the blade of impeller cavity, with the water inlet and the delivery port of impeller cavity intercommunication and with the shaft hole that the impeller cavity is not communicated, the shaft hole is connected with the motor shaft of circulating pump; the impeller cover is also provided with a limiting disc which is positioned in the impeller cavity and extends along the axial direction, and one end of the impeller seat, which faces the impeller cavity, is provided with a limiting groove which is circumferentially matched with the limiting disc and the end face of which is abutted against the limiting disc. The utility model discloses a spacing dish on the impeller lid and the cooperation of the spacing groove on the impeller seat realize the center pin location and the axial distance location of impeller lid and impeller seat, because of the atress is uneven when avoiding welding, lead to the skew of impeller seat and impeller lid center, guarantee concentricity between them.

Description

Impeller subassembly and contain its circulating pump

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to an impeller subassembly and contain its circulating pump, refer in particular to the circulating pump that is used for dish washer.

Background

A circulating pump for dish washer is by motor body, the water pump case, the impeller, heating member and control module constitute, motor body uses PMSM, after the circular telegram, power end input electricity is applyed in motor stator coil and is produced the rotatory specific magnetic field of power supply machine after the control panel conversion, rotary motion is done with certain rotational speed to the drive rotor, thereby the rotor motor axle can drive the impeller and be synchronous revolution and guarantee that the impeller is effectual drainage in the water pump case, the interior heating body of water pump case can carry out liquid heating according to the dish washer procedure simultaneously.

Impeller welded structure is more in the circulating pump on the existing market, and the blade is integrative with the impeller seat and is made, and the welding of blade and the impeller lid on the impeller seat has two kinds of modes: the method is characterized in that a welding hole on an impeller cover is a blind hole, an impeller seat is provided with a slot, a welding head penetrates through the impeller seat to weld the blade with the impeller cover, and at the moment, a welding weld mark is positioned at one end, facing the blade, of the impeller cover, namely in a water flow passing area (shown in figure 1); the second mode is that the welding hole on the impeller cover is a through hole, the welding weld mark of the impeller cover and the impeller seat is on the outer surface of the impeller cover (such as an impeller structure in the patent No. CN 215486789U), the stress surface is on the impeller cover when the two modes are welded, because the impeller cover has a certain radian and the positioning hole is positioned in a single point, the stress of parts is uneven when the parts are welded, and the phenomenon of decentration exists after the impeller seat and the impeller cover are welded.

In addition, the two welding modes do not have axial positioning of the impeller seat and the impeller cover, a welding head is pressed down during welding, the distance between the impeller seat and the impeller cover is difficult to guarantee, and the distance influences the flow and the power consumption of the circulating pump. And to the first kind of welding mode, because the welding weld mark is at the inner surface, hardly catch the welding defective products, there is the phenomenon of leaking to weld, to the second kind of welding mode, because the mark connects the weld mark at the outermost end of circulating pump, consequently there are phenomenons such as colliding with, fish tail, breach.

In summary, how to design an impeller assembly which has uniform welding stress, ensures the concentricity of an impeller seat and an impeller cover and improves the flow of a circulating pump is a problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

Part atress is uneven when solving the impeller subassembly welding among the prior art, has the technical problem of impeller seat and impeller lid welding back decentraction phenomenon, the utility model provides an above-mentioned problem is solved to impeller subassembly and circulating pump that contains it.

The utility model provides a technical scheme that its technical problem adopted is: an impeller assembly comprises an impeller cover and an impeller seat which are axially butted and matched and form an impeller cavity between the impeller cover and the impeller seat, blades positioned in the impeller cavity, a water inlet and a water outlet which are communicated with the impeller cavity and a shaft hole which is not communicated with the impeller cavity, wherein the shaft hole is connected with a motor shaft of a circulating pump; the impeller cover is also provided with a limiting disc which is positioned in the impeller cavity and extends along the axial direction, and one end of the impeller seat facing the impeller cavity is provided with a limiting groove which is circumferentially matched with the limiting disc and the end surface of the limiting groove is abutted against the limiting disc.

Furthermore, at least two tool positioning holes which correspond to one another are formed in the limiting disc and the limiting groove.

Furthermore, the shaft hole extends towards the direction of the impeller seat, the blades and the impeller cover are integrally formed, welding ribs extending axially are arranged on the blades, and welding holes for the welding ribs to penetrate through are formed in the surface of the impeller seat.

Furthermore, welding weld marks are formed on the surface of the impeller seat, back to the blades, and the area of each welding weld mark is larger than the cross section of each welding hole.

Furthermore, the number of the blades is 5-8, and each blade is provided with a welding rib.

Furthermore, the water inlet and the shaft hole extend from the impeller cover to two ends along the axial direction.

Further, the periphery of the impeller cavity is opened to form a water outlet.

Furthermore, the limiting disc is located in the center of the blade.

Further, the impeller cover comprises a cover body and a guide post connected to one end of the cover body through a reinforcing rib, the blades are connected with the cover body, the limiting disc is connected with the guide post, the shaft hole is located in the center of the guide post, and the guide post penetrates through the impeller seat and is connected with the motor shaft.

The utility model discloses still provide a circulating pump, including above the impeller subassembly.

The utility model has the advantages that:

(1) Impeller subassembly and contain its circulating pump, through the cooperation of spacing dish on the impeller lid and the spacing groove on the impeller wheel seat, realize the center pin location and the axial distance location of impeller wheel lid and impeller wheel seat, because of the atress is uneven when avoiding welding, lead to impeller wheel seat and impeller wheel lid center skew, guarantee concentricity between them.

(2) Impeller subassembly and contain its circulating pump, blade and impeller wheel lid integrated into one piece, blade and impeller wheel seat welded fastening, the welding weld mark face is located the surface of impeller wheel seat to towards the motor shaft direction, can not influence the circulating pump flow, can not appear colliding with yet, phenomenons such as fish tail, breach.

Drawings

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

FIG. 1 is a perspective view of an embodiment of an impeller assembly according to the present invention;

FIG. 2 is a perspective view of the impeller cover of the present invention;

FIG. 3 is a front view of the impeller cover of the present invention;

FIG. 4 is a perspective view of the impeller seat of the present invention;

fig. 5 is an axial cross-sectional view of the impeller assembly of the present invention;

fig. 6 is an exploded view of the circulation pump of the present invention.

In the figure, the impeller comprises an impeller cover 1, an impeller cover 101, a limiting disc 102, a welding rib 103, blades 104, a cover body 105, a reinforcing rib 106, a guide post 2, an impeller seat 201, a limiting groove 202, a welding hole 3, an impeller cavity 4, an impeller assembly 5, a water inlet 6, a shaft hole 7, a motor shaft 8, a tooling positioning hole 9, a welding weld mark 10, a flow guide 11, a bearing assembly 12, an insulating cover 13, a rotor injection molding body 14, a stator core 15, a coil framework 16 and a motor shell.

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 accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-5, an impeller assembly comprises an impeller cover 1 and an impeller seat 2 which are axially in butt joint and matched with each other to form an impeller cavity 3 therebetween, a blade 103 located in the impeller cavity 3, a water inlet 5 and a water outlet which are communicated with the impeller cavity 3, and a shaft hole 6 which is not communicated with the impeller cavity 3, wherein the shaft hole 6 is connected with a motor shaft 7 of a circulating pump; the impeller cover 1 is further provided with a limiting disc 101 which is positioned in the impeller cavity 3 and extends along the axial direction, and one end of the impeller seat 2 facing the impeller cavity 3 is provided with a limiting groove 201 which is circumferentially matched with the limiting disc 101 and the end surface of which is abutted.

The circumferential matching of the limiting disc 101 and the limiting groove 201 means that the circumferential outer sides of the limiting disc 101 and the limiting groove 201 are mutually attached, so that the impeller cover 1 and the impeller seat 2 can be preliminarily positioned, the positioning mode is simple, and the center deviation of the impeller cover 1 and the impeller seat 2 caused by uneven stress in the welding process can be avoided. The end faces of the limiting disc 101 and the limiting groove 201 are abutted to realize axial positioning of the limiting disc 101 and the limiting groove 201, the distance between the limiting disc 101 and the limiting groove 201 is ensured, and flow and power loss of the circulating pump are avoided.

Preferably, the limiting disc 101 and the limiting groove 201 are provided with at least two tool positioning holes 8 in one-to-one correspondence, the welding tool penetrates through the tool positioning holes 8 in the limiting disc 101 and the limiting groove 201 simultaneously, circumferential fixing of the limiting disc 101 and the limiting groove 201 is achieved, the end faces of the limiting disc 101 and the limiting groove 201 can be circular with the center of the impeller assembly 4 as the center of a circle, and poor welding caused by improper placement of parts can be avoided through the limiting groove 201 and the tool positioning holes 8.

The inlet 5 of the impeller assembly 4 is located generally centrally and axially in the impeller assembly 4 and the outlet is located generally on the circumferential surface of the impeller chamber 3, i.e. the outer circumference of the impeller chamber 3 is open.

The utility model provides a blade 103 can be located impeller cover 1, then blade 103 and impeller seat 2 separately make, and blade 103 also can be located impeller seat 2, then blade 103 and impeller cover 1 separately make, through the welding mode with the part welded fastening of blade 103 with it separation.

This embodiment is preferred with blade 103 and impeller lid 1 integrated into one piece, then blade 103 need with impeller seat 2 welded fastening, for avoiding the problem that two kinds of welding methods exist separately in the background art, the utility model discloses extend shaft hole 6 towards impeller seat 2 direction, impeller seat 2 is close to the baffle 10 of circulating pump promptly, has axially extending's welding muscle 102 on the blade 103, respectively sets up a welding muscle 102 on the preferred every blade 103. Welding holes 202 for allowing the welding ribs 102 to penetrate through are formed in the surface of the impeller seat 2, the welding holes 202 are through holes, after the welding ribs 102 penetrate through the welding holes 202, welding is performed on the outer surface (the surface facing the flow guide body 10) of the impeller seat 2, and ultrasonic welding is preferably adopted, so that welding weld marks 9 (shown in fig. 5) are formed on the outer surface of the impeller seat 2, whether poor welding exists or not can be directly seen from the appearance, and compared with a first welding mode in the background art, the welding method is more efficient. And impeller subassembly 4 assembles in the circulating pump after, and welding weld mark 9 is inside to not in impeller cavity 3, can not influence the flow, the outward appearance is also better. Preferably, the area of the welding weld mark 9 on the surface of the impeller seat 2 is larger than the cross-sectional area of the welding hole 202, so that the impeller cover 1 and the impeller seat 2 are connected more firmly.

As shown in fig. 5, according to a specific embodiment of the impeller assembly 4 of the present invention, the impeller seat 2 is a disc-shaped structure, the impeller cover 1 includes a cover body 104 and a guide post 106 connected to one end of the cover body 104 through a reinforcing rib 105, the vane 103 is connected to the cover body 104, the limiting plate 101 is connected to the guide post 106, the shaft hole 6 is located at the center of the guide post 106, the guide post 106 passes through the impeller seat 2 to be connected to the motor shaft 7, the water inlet 5 and the shaft hole 6 are located at two ends of the impeller cover 1, and the cover body 104 extends to two ends along the axial direction. In order to ensure the connection strength, the number of the blades 103 is preferably 5 to 8, the impeller assembly 4 of the present embodiment is provided with five blades 103, and the number of the welding ribs 102 is also five (as shown in fig. 2).

The utility model discloses still provide a circulating pump, including above impeller subassembly 4. As shown in fig. 6, for the explosion diagram of the concrete embodiment of circulating pump, the circulating pump includes impeller subassembly 4, baffle 10, bearing assembly 11, motor shaft 7, rotor injection molding 13, stator core 14, coil skeleton 15, motor casing 16 and insulating boot 12, stator module is constituteed to stator core 14 and coil skeleton 15, motor shaft 7 and rotor injection molding 13 constitute the rotor subassembly, 11 covers of bearing assembly are established at motor shaft 7 both ends, and rotate with motor casing 16 and be connected, baffle 10 is located the output of motor shaft 7, motor shaft 7 and impeller subassembly 4's 6 fixed connection in shaft hole. After the power is switched on, power input is converted by an external controller and then applied to the stator core 14 of the stator assembly to generate a specific magnetic field for the motor to rotate, the rotor assembly is driven to rotate at a certain rotating speed, the motor shaft 7 drives the impeller assembly 4 to rotate synchronously, and the guide body 10 guides liquid discharged from the impeller cavity 3 to flow towards the outlet of the circulating pump, so that the liquid entering the pump is ensured to be normally discharged.

In the description of the present invention, it should be understood that the terms "center", "inner", "outer", "axial", "circumferential", and the like refer to the orientation or positional relationship shown in the drawings, which are only for convenience of description and simplification of the description, and do not indicate or imply that the device or element 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 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

1. An impeller assembly, characterized by: the impeller comprises an impeller cover (1) and an impeller seat (2) which are axially butted and matched and form an impeller cavity (3) between the impeller cover and the impeller seat, blades (103) positioned in the impeller cavity (3), a water inlet (5) and a water outlet which are communicated with the impeller cavity (3), and a shaft hole (6) which is not communicated with the impeller cavity (3), wherein the shaft hole (6) is connected with a motor shaft (7) of a circulating pump;

the impeller cover (1) is further provided with a limiting disc (101) which is positioned in the impeller cavity (3) and extends along the axial direction, and one end of the impeller seat (2) facing the impeller cavity (3) is provided with a limiting groove (201) which is circumferentially matched with the limiting disc (101) and the end face of which is abutted.

2. The impeller assembly (4) of claim 1, wherein: the axial hole (6) extends towards the direction of the impeller seat (2), the blade (103) and the impeller cover (1) are integrally formed, the blade (103) is provided with an axially extending welding rib (102), and the surface of the impeller seat (2) is provided with a welding hole (202) for the welding rib (102) to penetrate through.

3. The impeller assembly (4) according to claim 1 or 2, characterized in that: the limiting disc (101) and the limiting groove (201) are provided with at least two tool positioning holes (8) in one-to-one correspondence.

4. The impeller assembly (4) of claim 2, wherein: welding weld marks (9) are formed on the surface, back to the blades (103), of the impeller seat (2), and the area of each welding weld mark (9) is larger than the sectional area of each welding hole (202).

5. The impeller assembly (4) according to claim 4, characterized in that: the number of the blades (103) is 5-8, and each blade (103) is provided with a welding rib (102).

6. The impeller assembly (4) according to claim 1 or 2, characterized in that: the water inlet (5) and the shaft hole (6) extend from the impeller cover (1) to two ends along the axial direction.

7. The impeller assembly (4) according to claim 1 or 2, characterized in that: the periphery of the impeller cavity (3) is opened to form a water outlet.

8. The impeller assembly (4) according to claim 1 or 2, characterized in that: the limiting disc (101) is located in the center of the blade (103).

9. The impeller assembly (4) according to claim 6, characterized in that: the impeller cover (1) comprises a cover body (104) and a guide column (106) connected to one end of the cover body (104) through a reinforcing rib (105), the blades (103) are connected with the cover body (104), the limiting disc (101) is connected with the guide column (106), the shaft hole (6) is located in the center of the guide column (106), and the guide column (106) penetrates through the impeller seat (2) and is connected with the motor shaft (7).

10. A circulation pump, characterized by: comprising an impeller assembly (4) according to any of claims 1-9.