CN221973821U - Water pump and water heater - Google Patents

Abstract

The present application discloses a water pump and a water heater. The water pump includes a motor, a centrifugal impeller and convex ribs. The motor includes a stator and a rotor. The rotor is rotatably arranged in the stator. The rotor is provided with a rotating shaft portion. The centrifugal impeller is arranged on the rotating shaft portion and is suitable for rotating under the drive of the rotor. The convex ribs are arranged on the rotating shaft portion and are located between the centrifugal impeller and the rotor. By arranging the convex ribs on the rotating shaft portion, when the rotor rotates, the rotor not only drives the centrifugal impeller to rotate, but also drives the convex ribs to rotate. The rotation of the convex ribs drives the water flow to rotate around the rotating shaft portion, thereby forming a vortex between the centrifugal impeller and the rotor. The vortex causes the sediment in the water flow to be retained, thereby preventing a large amount of sediment from entering the gap between the rotor and the stator and causing the rotor to be stuck, thereby ensuring the normal rotation of the rotor.

Description

Water pumps and water heaters

Technical Field

The present application relates to the technical field of fluid pumping, and in particular to a water pump and a water heater.

Background Art

The motor of the water pump has a stator and a rotor. The rotor drives the centrifugal impeller to rotate to pump the water. In the process of pumping water, the rotor will contact the water. The mud and sand in the water will enter the gap between the rotor and the stator and cause the rotor to get stuck, hindering the normal rotation of the rotor.

Utility Model Content

The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present application proposes a water pump.

To achieve the above objectives, the present application discloses a water pump, which comprises:

A motor, the motor comprising a stator and a rotor, the rotor being rotatably disposed in the stator, and the rotor being provided with a rotating shaft;

a centrifugal impeller, the centrifugal impeller being disposed on the rotating shaft portion and being adapted to rotate under the drive of the rotor; and

The convex rib is arranged on the rotating shaft and is located between the centrifugal impeller and the rotor.

In some embodiments of the present application, the rib extends along the axial direction of the rotating shaft portion.

In some embodiments of the present application, the rib extends from the centrifugal impeller to the rotor.

In some embodiments of the present application, there are multiple convex ribs, and the multiple convex ribs are alternately arranged along the circumference of the rotating shaft portion.

In some embodiments of the present application, the plurality of ribs are evenly distributed along the circumference of the rotating shaft portion.

In some embodiments of the present application, the convex ribs are arranged in a centrally symmetrical manner about the rotating shaft portion.

In some embodiments of the present application, along the axial direction of the rotating shaft portion, the side of the convex rib away from the rotating shaft portion is in a straight line shape.

In some embodiments of the present application, the convex rib is provided with a concave cavity open away from the rotating shaft portion.

In some embodiments of the present application, a cavity wall of the concave cavity close to the centrifugal impeller is higher than a cavity wall of the concave cavity close to the rotor.

In some embodiments of the present application, the inclination of the cavity wall close to the centrifugal impeller is greater than the inclination of the cavity wall close to the rotor.

In some embodiments of the present application, an annular space surrounding the rotating shaft portion is provided between the centrifugal impeller and the rotor.

In some embodiments of the present application, the annular space is formed by the centrifugal impeller, the rotor and the rotating shaft.

In some embodiments of the present application, along the radial direction of the rotating shaft portion, the rib is at a preset distance from an edge of the rotor and an edge of the centrifugal impeller.

In some embodiments of the present application, the centrifugal impeller, the rotating shaft, the rotor and the ribs form an integrated structure.

The present application also discloses a water heater, which comprises the water pump mentioned above.

The technical solution of the present application is to arrange ribs on the rotating shaft. When the rotor rotates, the rotor not only drives the centrifugal impeller to rotate, but also drives the ribs to rotate. The rotation of the ribs drives the water flow to follow the rotation of the rotating shaft, so that the water flow between the centrifugal impeller and the rotor forms a vortex. The vortex causes the mud and sand in the water flow to be retained, preventing a large amount of mud and sand from entering the gap between the rotor and the stator and causing the rotor to be stuck, thereby ensuring the normal rotation of the rotor.

Other advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.

FIG1 is a schematic diagram of a water pump in some embodiments;

FIG2 is an exploded view of a water pump in some embodiments;

Fig. 3 is a cross-sectional view of a water pump in some embodiments;

FIG4 is a schematic diagram of a first centrifugal impeller, a second centrifugal impeller and a rotor in some embodiments;

FIG5 is a schematic diagram of a first centrifugal impeller, a second centrifugal impeller and a rotor in some embodiments (the viewing angle is different from that of FIG4 );

FIG6 is a cross-sectional view of a first centrifugal impeller, a second centrifugal impeller, and a rotor in some embodiments;

FIG7 is an exploded view of a first centrifugal impeller in some embodiments;

FIG8 is an exploded view of a second centrifugal impeller in some embodiments;

FIG9 is a schematic diagram of a second centrifugal impeller and a rotor in some embodiments;

FIG10 is a cross-sectional view of a second centrifugal impeller and a rotor in some embodiments;

FIG11 is a cross-sectional view of a second centrifugal impeller and a rotor in some embodiments (the structure is different from that of FIG10 );

FIG. 12 is a schematic diagram of a water heater in some embodiments.

Description of Figure Numbers:

Water pump 100, water heater 200, pump body 1000, first centrifugal impeller 1100, first front cover plate 1110, first inlet 1111, first blade 1120, first rear cover plate 1130, first outlet 1140, first bearing 1150, second centrifugal impeller/centrifugal impeller 1200, second front cover plate 1210, second inlet 1211, second blade 1220, second rear cover plate 1230 0, second outlet 1240, second bearing 1250, pump housing 1300, water inlet 1310, water outlet 1320, motor 2000, stator 2100, support shaft 2110, first cavity 2120, rotor 2200, bracket 2210, magnet 2220, shaft portion 3000, convex rib 3100, concave cavity 3110, cavity wall 3111, cavity wall 3112, annular space 3200.

The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

In a first aspect of the present application, a water pump 100 is provided. As shown in FIGS. 1 to 5 , the water pump 100 includes a motor 2000, a centrifugal impeller 1200 and a convex rib 3100. The motor 2000 includes a rotor 2200 and a stator 2100. The rotor 2200 is rotatably disposed in the stator 2100, and the rotor 2200 is provided with a rotating shaft portion 3000. The centrifugal impeller 1200 is disposed on the rotating shaft portion 3000, and the centrifugal impeller 1200 can be driven by the rotor 2200 and rotate along with the rotation of the rotor 2200. The convex rib 3100 is disposed on the rotating shaft portion 3000, and the convex rib 3100 is disposed between the rotor 2200 and the centrifugal impeller 1200.

By arranging the convex rib 3100 on the rotating shaft portion 3000, when the rotor 2200 rotates, the rotor 2200 not only drives the centrifugal impeller 1200 to rotate, but also drives the convex rib 3100 to rotate. The rotation of the convex rib 3100 drives the water flow to follow the rotation of the rotating shaft portion 3000, so that the water flow between the centrifugal impeller 1200 and the rotor 2200 forms a vortex. The vortex causes the mud and sand in the water flow to be retained (retained at the position where the vortex is located), thereby preventing a large amount of mud and sand from entering the gap between the rotor 2200 and the stator 2100 and causing the rotor 2200 to be stuck, thereby ensuring the normal rotation of the rotor 2200.

Specifically, the water pump 100 includes a pump body 1000 and a motor 2000, which are assembled together. The pump body 1000 includes a pump casing 1300 and a centrifugal impeller 1200, which is arranged in the pump casing 1300. The so-called centrifugal impeller 1200 is axially inlet and radially outlet. The pump casing 1300 is provided with a water inlet 1310 and a water outlet 1320. The pump casing 1300 is a main structural member for forming a cavity for pumping water flow. The pump casing 1300 can be made of plastic material or other materials. In order to meet different installation requirements, the pump casing 1300 can be an integral structure or a split structure, and can be a regular shape or an irregular shape. The motor 2000 includes a rotor 2200 and a stator 2100 (the fixed part of the motor 2000 is regarded as the stator 2200, and the rotatable part is regarded as the rotor 2100). The stator 2100 is assembled with the pump housing 1300. The assembly of the stator 2100 and the pump housing 1300 can be fixed to each other by screw fastening or other means. The rotor 2200 is rotatably arranged inside the stator 2100, and the shaft portion 3000 is arranged on the rotor 2200. As the rotor 2200 rotates, the rotor 2200 can drive the shaft portion 3000 to rotate synchronously (that is, the shaft portion 3000 and the rotor 2200 are relatively fixed). The centrifugal impeller 1200 is arranged on the shaft portion 3000, so the rotation of the rotor 2200 can drive the centrifugal impeller 1200 to rotate synchronously. Generally speaking, in order to support the rotation of the centrifugal impeller 1200, the rotating shaft portion 3000 and the rotor 2200, the water pump 100 also includes a support shaft 2110, one end of the support shaft 2110 is fixed on the stator 2100, and the other end extends into the pump casing 1300 and is fixed in the pump casing 1300, the rotor 2200, the rotating shaft portion 3000 and the centrifugal impeller 1200 can all be rotatably mounted on the support shaft 2110, when the rotor 2200 rotates, the rotor 2200 rotates around the support shaft 2110, and then drives the rotating shaft portion 3000 and the centrifugal impeller 1200 to rotate around the support shaft 2110, the support shaft 2110 supports the rotation of the rotor 2200, the rotating shaft portion 3000 and the centrifugal impeller 1200.

When the motor 2000 is running, the rotor 2200 rotates around the support shaft 2110 relative to the stator 2100, and the rotor 2200 synchronously drives the rotating shaft portion 3000 to rotate, and then the rotating shaft portion 3000 drives the centrifugal impeller 1200 to rotate. When the centrifugal impeller 1200 rotates, water flows into the interior of the pump housing 1300 from the water inlet 1310, and then enters the centrifugal impeller 1200. After being acted upon by the centrifugal impeller 1200, the water is thrown out of the centrifugal impeller 1200 and then discharged through the water outlet 1320, thereby pressurizing the water.

As mentioned above, the stator 2100 is assembled with the pump housing 1300, the rotor 2200 is arranged in the stator 2100 and the rotor 2200 needs to drive the centrifugal impeller 1200 to rotate, so the rotor 2200 will also be in a wading environment. When the water pump 100 draws water, the water flow fills the pump housing 1300 and then flows between the rotor 2200 and the stator 2100, so that the rotor 2200 is in a wading environment. Generally speaking, the matching clearance between the rotor 2200 and the stator 2100 is relatively small, and the water flow contains fine particles such as silt. When the water pump 100 draws water, the silt may enter between the rotor 2200 and the stator 2100, and the silt may cause the rotation of the rotor 2200 to be stuck, increase the resistance and wear of the rotation of the rotor 2200, and even cause the rotor 2200 to be stuck and not rotate.

For example, the stator 2100 is provided with a first cavity 2120 (the following description will also be based on this, the cavity wall of the first cavity 2120 isolates the interior of the stator 2100 to prevent water from entering the interior of the stator 2100), the first cavity 2120 is open to the pump housing 1300, the support shaft 2110 is inserted into the first cavity 2120 and fixed to the cavity bottom of the first cavity 2120, the rotor 2200 is sleeved on the support shaft 2110 and installed in the first cavity 2120, there is a gap between the rotor 2200 and the cavity wall of the first cavity 2120 (that is, a fitting gap is formed between the rotor 2200 and the stator 2100), the rotor 2200 can rotate around the support shaft 2110 in the first cavity 2120, and by providing an open first cavity 2120, it is convenient for the rotor 2200 to be installed in the first cavity 2120. It is also in this arrangement that when the water flow is pumped, the water entering the pump housing 1300 easily enters between the rotor 2200 and the stator 2100, so that the mud and sand in the water flow also enter between the rotor 2200 and the stator 2100 synchronously, causing the rotor 2200 to be stuck. Of course, the form of the stator 2100 is not limited to the above-mentioned record. As long as the rotor 2200 is in a wading environment, it is possible to be stuck under the action of mud and sand. Therefore, in order to solve this problem, the present application solves it by setting a convex rib 3100.

The convex rib 3100 is arranged on the rotating shaft portion 3000, that is, the convex rib 3100 is relatively fixed to the rotating shaft portion 3000. The so-called convex rib 3100 is a protrusion relative to the outer periphery of the rotating shaft portion 3000. In this way, when the rotor 2200 rotates, the rotor 2200 drives the rotating shaft portion 3000 to rotate, and the rotating shaft portion 3000 synchronously drives the convex rib 3100 to rotate, so that the convex rib 3100 causes disturbance to the water. Since the convex rib 3100 forms a circular motion in the process of following the rotation of the rotating shaft portion 3000, the convex rib 3100 The disturbance of water by 100 causes the water to form a vortex around the rotating shaft portion 3000. When the mud and sand flow to the position corresponding to the rotating shaft portion 3000, they are driven by the vortex and rotate around the rotating shaft portion 3000 at this position following the vortex. Since the convex rib 3100 is located between the centrifugal impeller 1200 and the rotor 2200, the mud and sand are retained between the centrifugal impeller 1200 and the rotor 2200, preventing the mud and sand from entering between the rotor 2200 and the stator 2100, thereby preventing the mud and sand from blocking the rotation of the rotor 2200.

As shown in combination with FIG. 4 and FIG. 5 , in some embodiments of the present application, the convex rib 3100 extends a certain length along the axial direction of the rotating shaft portion 3000 , thereby further ensuring the retention of mud and sand.

Specifically, as mentioned above, the rotor 2200 is installed in the stator 2100 and needs to drive the centrifugal impeller 1200 to rotate. Therefore, in order to avoid interference between the centrifugal impeller 1200 and the stator 2100, the shaft portion 3000 has a certain length along its axial direction to ensure that there is sufficient spacing between the centrifugal impeller 1200 and the stator 2100. For this reason, in order to ensure that the vortex formed between the centrifugal impeller 1200 and the rotor 2200 is sufficient to retain the mud and sand, in this embodiment, the rib 3100 is designed to extend a certain length along the axial direction of the shaft portion 3000, so that a sufficiently large vortex can be formed between the centrifugal impeller 1200 and the rotor 2200, and the vortex can occupy the space between the centrifugal impeller 1200 and the rotor 2200 as much as possible, thereby effectively retaining the mud and sand, further preventing the mud and sand from entering between the stator 2100 and the rotor 2200, and then preventing the rotation of the rotor 2200 from being stuck.

4 and 5 , in some embodiments of the present application, the convex rib 3100 extends from the centrifugal impeller 1200 to the rotor 2200 along the axial direction of the rotating shaft portion 3000. It can also be considered that the convex rib 3100 extends from the rotor 2200 to the centrifugal impeller 1200 along the axial direction of the rotating shaft portion 3000, that is, the convex rib 3100 contacts the centrifugal impeller 1200 and the rotor 2200 respectively. In this way, along the axial direction of the rotating shaft portion 3000, the convex rib 3100 can occupy the space between the centrifugal impeller 1200 and the rotor 2200 to a certain extent. Then, in the process of the convex rib 3100 rotating with the rotating shaft portion 3000, in the axial direction of the rotating shaft portion 3000, the convex rib 3100 can disturb the water flow in the space between the centrifugal impeller 1200 and the rotor 2200, thereby forming a larger range of vortices in the space between the centrifugal impeller 1200 and the rotor 2200, further improving the retention effect of sediment.

In addition, since the convex rib 3100 contacts the centrifugal impeller 1200 and the rotor 2200 respectively, the convex rib 3100 supports the centrifugal impeller 1200 and the rotor 2200, which can improve the relative stability between the centrifugal impeller 1200 and the rotor 2200, and is more conducive to overcoming the water flow resistance, so that the rotor 2200 drives the centrifugal impeller 1200 to rotate more steadily.

As shown in Figures 4, 5 and 9, in some embodiments of the present application, the number of convex ribs 3100 is designed to be multiple, and the multiple convex ribs 3100 are arranged along the outer periphery of the rotating shaft portion 3000, and the multiple convex ribs 3100 are arranged alternately. Through the arrangement of the multiple convex ribs 3100, the time for vortex formation is shortened, the effect of the vortex is enhanced, and the retention effect of sediment is further improved.

Specifically, there are multiple convex ribs 3100, and in this article, multiple means two or more. For example, as shown in Figures 4 and 5, there are two convex ribs 3100. It can be understood that, assuming that there is one convex rib 3100, there is no convex rib 3100 at other positions of the shaft portion 3000. Then, when the shaft portion 3000 just starts to rotate, the position without the convex rib 3100 may not have time to disturb the water, thereby reducing the formation of vortices at this position. For this reason, in the present embodiment, a plurality of convex ribs 3100 are designed, and the convex ribs 3100 are alternately arranged along the circumference of the rotating shaft portion 3000. Thus, by setting a plurality of convex ribs 3100, the distribution and occupation of the space between the centrifugal impeller 1200 and the rotor 2200 by the convex ribs 3100 are improved, and the existence of invalid positions (invalid positions mean spaces where no convex ribs 3100 exist), can be reduced. This can enhance the formation of vortices, especially when the rotating shaft portion 3000 just starts to rotate, because the speed of the rotor 2200 has not reached the predetermined speed at this time, or when the rotor 2200 gradually stops, the speed of the rotor 2200 gradually decreases. By setting a plurality of convex ribs 3100, it is more conducive to the formation of vortices when the rotor 2200 is at a low speed, thereby ensuring the retention of sediment.

Furthermore, the plurality of convex ribs 3100 are evenly distributed along the circumference of the rotating shaft portion 3000, that is, the spacing between any two adjacent convex ribs 3100 is equal. As mentioned above, the rotation of the convex ribs 3100 disturbs the water, so that a vortex around the rotating shaft portion 3000 is formed in the space between the centrifugal impeller 1200 and the rotor 2200. By evenly distributing the plurality of convex ribs 3100 in the circumference of the rotating shaft portion 3000, that is, there are a plurality of convex ribs 3100 in the direction around the rotating shaft portion 3000 to disturb the water, the vortex can be strengthened to flow around the rotating shaft portion 3000, and the retention effect of sediment can be further enhanced. Furthermore, since the plurality of ribs 3100 are evenly distributed in the circumferential direction of the rotating shaft portion 3000, eccentricity can be avoided, so that the rotation of the rotating shaft portion 3000 is more stable and abnormal vibration can be avoided. In particular, as mentioned above, the centrifugal impeller 1200, the rotating shaft portion 3000 and the rotor 2200 are all sleeved on the support shaft 2110, so that the rotation of the centrifugal impeller 1200, the rotating shaft portion 3000 and the rotor 2200 is also more stable, thereby avoiding abnormal wear.

As shown in Figures 4 and 5, in some embodiments of the present application, the ribs 3100 are arranged symmetrically about the shaft portion 3000 with the shaft portion 3000 as the center. Through such a design, the stability of the rotation of the shaft portion 3000 can also be improved when the ribs 3100 are unevenly distributed.

Specifically, the so-called convex ribs 3100 are centrally symmetrical about the rotating shaft portion 3000, that is, when any convex rib 3100 rotates 180° around the rotating shaft portion 3000, the convex rib 3100 will overlap with another convex rib 3100. In this way, the centripetal forces received by the two convex ribs 3100 when rotating with the rotating shaft portion 3000 are opposite and collinear, thereby canceling each other out, thereby making the rotation of the rotating shaft portion 3000 smoother.

Of course, the rotation stability of the rotating shaft portion 3000 can be improved by evenly distributing multiple convex ribs 3100 along the circumference of the rotating shaft portion 3000, or by symmetrically arranging the convex ribs 3100. For example, the convex ribs 3100 include two, and the two convex ribs 3100 are arranged at 180°, as shown in Figures 4 and 5. In this way, the centripetal forces on the two convex ribs 3100 are opposite and collinear, so as to offset each other, which is conducive to improving the rotation stability of the rotating shaft portion 3000. It can be understood that when the two convex ribs 3100 are arranged at 180°, the two convex ribs 3100 are also evenly distributed along the circumference of the rotating shaft portion 3000.

As shown in Figures 4 and 5, in some embodiments of the present application, the side of the rib 3100 away from the shaft portion 3000 is straight along the axial direction of the shaft portion 3000, which makes it easier to prepare the rib 3100, reduces manufacturing difficulty, and improves manufacturing efficiency.

Specifically, the side of the convex rib 3100 away from the rotating shaft 3000 is in a straight line shape without too much undulation, which can reduce the manufacturing difficulty of the convex rib 3100. For example, the convex rib 3100 is formed by integral injection molding of a mold, and the side of the convex rib 3100 away from the rotating shaft 3000 is in a straight line shape, and the mold design is also relatively simple, thereby facilitating the preparation of the convex rib 3100. In addition, the convex rib 3100 is arranged on the rotating shaft 3000, and the convex rib 3100 can be a separate component relative to the rotating shaft 3000 and connected to the rotating shaft 3000 by a connecting means, or the convex rib 3100 and the rotating shaft 3000 are an integrally formed component. Compared with the former, when the convex rib 3100 and the rotating shaft 3000 form an integrally formed component, the side of the convex rib 3100 away from the rotating shaft 3000 is in a straight line shape, which is more convenient for the integral injection molding preparation of the convex rib 3100 and the rotating shaft 3000, and reduces the manufacturing difficulty.

As shown in Figures 9 and 10, in some embodiments of the present application, unlike the previous embodiments, the convex rib 3100 in the present embodiment is formed with a concave cavity 3110, and the concave cavity 3110 is open away from the rotating shaft portion 3000, that is, the concave cavity 3110 is open away from the rotating shaft portion 3000 approximately along the radial direction of the rotating shaft portion 3000. The formation of the concave cavity 3110 is equivalent to forming a concave and convex undulating structure on the side of the convex rib 3100 away from the rotating shaft portion 3000. When the rotating shaft portion 3000 rotates, the disturbance to the water flow can be increased, thereby strengthening the disturbance effect on the sediment, so that the sediment fully follows the flow of the vortex and flows around the rotating shaft portion 3000 between the centrifugal impeller 1200 and the rotor 2200.

It can be understood that when mud and sand enter between the centrifugal impeller 1200 and the rotor 2200, the mud and sand are retained between the centrifugal impeller 1200 and the rotor 2200 under the action of the vortex. In order to discharge the retained mud and sand, in this embodiment, a concave cavity 3110 is provided on the side of the convex rib 3100 away from the rotating shaft portion 3000. Through the formation of the concave cavity 3110, when the rotating shaft portion 3000 rotates, the convex rib 3100 can increase the disturbance of the water flow, thereby forming a disturbance of the mud and sand. As mentioned above, the water flow discharged from the centrifugal impeller 1200 is finally discharged from the pump housing 1300 through the water outlet 1320. In this embodiment, the concave cavity 3110 is set to enhance the disturbance of the sediment, so that the sediment can more easily follow the vortex flow, and then conveniently follow the discharge of the water flow to leave the space between the centrifugal impeller 1200 and the rotor 2200, thereby preventing excessive accumulation of sediment between the centrifugal impeller 1200 and the rotor 2200.

As shown in FIG. 10 , in some embodiments of the present application, the cavity wall 3111 of the concave cavity 3110 close to the centrifugal impeller 1200 needs to be designed to be higher than the cavity wall 3112 close to the rotor 2200. In the process of the shaft portion 3000 driving the rib 3100 to rotate synchronously, the cavity wall 3111 of the concave cavity 3110 close to the centrifugal impeller 1200 is higher, while the cavity wall 3112 close to the rotor 2200 is relatively lower, so that a pressure difference can be formed on the water flow along the axial direction of the shaft portion 3000, so that an additional vortex can be formed in the concave cavity 3110, that is, the rib 3100 drives the water flow to flow around the shaft portion 3000 to form a large vortex, and a small vortex can also be formed in the concave cavity 3110, so that the sediment retention effect can be further enhanced to prevent the sediment from entering between the rotor 2200 and the stator 2100. In addition, the flow directions of the small vortex and the large vortex are different, so that the disturbance of the silt can be enhanced, the accumulation of the silt can be avoided, and the silt can be discharged along with the discharge of the water flow (through the water outlet 1320) during the retention process. In particular, after the water pump 100 is not used for a period of time, the silt remaining between the centrifugal impeller 1200 and the rotor 2200 will settle under the action of gravity. Through such a setting in this embodiment, when the water pump 100 is started, the settled silt can be disturbed, and then the silt can be discharged along with the water flow.

Further, in combination with what is shown in FIG. 11 , in some embodiments of the present application, the inclination of the cavity wall 3111 of the cavity 3110 close to the centrifugal impeller 1200 needs to be designed to be greater than the inclination of the cavity wall 3112 of the cavity 3110 close to the rotor 2200 .

In this embodiment, the so-called inclination, i.e., the minimum angle between the cavity wall 3111 of the cavity 3110 close to the centrifugal impeller 1200 and the axis of the rotating shaft portion 3000, is greater than the minimum angle between the cavity wall 3112 of the cavity 3110 close to the rotor 2200 and the axis of the rotating shaft portion 3000. It can be understood that, that is, the more the cavity wall of the cavity 3110 and the axis of the rotating shaft portion 3000 tend to be perpendicular, the greater the inclination. For example, the cavity wall 3111 of the cavity 3110 close to the centrifugal impeller 1200 and the axis of the rotating shaft portion 3000 are perpendicular to each other, while the cavity wall 3112 of the cavity 3110 close to the rotor 2200 and the axis of the rotating shaft portion 3000 are inclined, and the inclination of the cavity wall 3111 is greater than the inclination of the cavity wall 3112. By such arrangement, the pressure difference in the axial direction of the rotating shaft portion 3000 is strengthened, which is more conducive to the formation of a small vortex in the concave cavity 3110.

As shown in combination with Figures 5, 6 and 9, in some embodiments of the present application, an annular space 3200 is provided between the centrifugal impeller 1200 and the rotor 2200, and the annular space 3200 surrounds the rotating shaft portion 3000. It can be understood that when the water pump 100 is running, the water pump 100 needs to continuously pump water flow, and the water inside the water pump 100 is in a flowing state. In this embodiment, by providing an annular space 3200 between the centrifugal impeller 1200 and the rotor 2200, the annular space 3200 forms a protection for the vortex, that is, within the range defined by the annular space 3200, the vortex is more easily formed under the action of the ribs 3100, and is prevented from being destroyed as the water flows.

Furthermore, in some embodiments of the present application, the annular space 3200 is surrounded by the centrifugal impeller 1200, the rotating shaft portion 3000 and the rotor 2200, which can reduce the space occupied.

It can be understood that the annular space 3200 mentioned in the foregoing is arranged between the centrifugal impeller 1200 and the rotor 2200. It is sufficient to ensure that the annular space 3200 is spatially located between the centrifugal impeller 1200 and the rotor 2200. In the present embodiment, the annular space 3200 is directly formed by the centrifugal impeller 1200 and the rotor 2200 in cooperation with the rotating shaft portion 3000. This is beneficial to compressing the size of the water pump 100 in the axial direction, reducing the space occupied by the water pump 100, and thus facilitating the miniaturization of the water pump 100.

As shown in Figure 10, in some embodiments of the present application, the rib 3100 is at a preset distance from the edge of the centrifugal impeller 1200 along the radial direction of the shaft portion 3000, and the rib 3100 is at a preset distance from the edge of the rotor 2200 along the radial direction of the shaft portion 3000. Through such an arrangement, the vortex and sediment can flow fully in the annular space 3200, making it easier for the sediment to follow the water flow (through the water outlet 1320) and be discharged from the annular space 3200.

Specifically, by the convex rib 3100 being at a preset distance from the edge of the centrifugal impeller 1200 along the radial direction of the shaft portion 3000, and the convex rib 3100 being at a preset distance from the edge of the rotor 2200 along the radial direction of the shaft portion 3000, it is easier to form a coherent space in the direction around the shaft portion 3000, thereby facilitating the formation of a vortex, and the convex rib 3100 is arranged to form a certain division in the space between the centrifugal impeller 1200 and the rotor 2200. In this embodiment, the convex rib 3100 is at a certain distance from the edge of the rotor 2200 and the edge of the centrifugal impeller 1200. Driven by the vortex, mud and sand at different positions are easier to flow fully without being blocked by the convex ribs 3100, and the mud and sand are easier to flow fully and can be discharged from the pump casing 1300 along with the water flow, thereby minimizing the deposition of mud and sand in the annular space 3200.

In some embodiments of the present application, the centrifugal impeller 1200, the shaft portion 3000, the rib 3100 and the rotor 2200 form an integrated structure. It can be understood that the so-called integrated structure means that there is no obvious connection seam between the centrifugal impeller 1200, the shaft portion 3000, the rib 3100 and the rotor 2200. For example, the centrifugal impeller 1200, the shaft portion 3000, the rib 3100 and the rotor 2200 are connected by welding, welding and/or injection molding to form an integrated structure, which effectively strengthens the structural strength of the centrifugal impeller 1200, the shaft portion 3000, the rib 3100 and the rotor 2200 and prevents the components from loosening. It is also because of the integrated structure that the number of parts when assembling the water pump 100 can be reduced, thereby effectively improving the assembly efficiency.

Further, in this embodiment, in combination with Figures 4, 5 and 6, a first centrifugal impeller 1100 and a second centrifugal impeller 1200 are included. The second centrifugal impeller 1200 is the centrifugal impeller 1200 mentioned in the previous text, that is, the second centrifugal impeller 1200 is arranged on the rotating shaft portion 3000, and the first centrifugal impeller 1100 is transmission-connected with the second centrifugal impeller 1200. By designing the first centrifugal impeller 1100 and the second centrifugal impeller 1200, step-by-step pressurization of the water flow is achieved.

Specifically, the rotor 2200, the rotating shaft portion 3000, the rib 3100 and the second centrifugal impeller 1200 form an integrated structure and are sleeved on the support shaft 2110. The first centrifugal impeller 1100 is also sleeved on the support shaft 2110, and the first centrifugal impeller 1100 is transmission-connected to the second centrifugal impeller 1200. There are multiple ways to transmission-connect the first centrifugal impeller 1100 and the second centrifugal impeller 1200, such as plugging into each other. The first centrifugal impeller 1100 is closer to the water inlet 1310 than the second centrifugal impeller 1200, and the second centrifugal impeller 1200 is closer to the water outlet 1320 than the first centrifugal impeller 1100. When the water pump 100 is started, water flows into the interior of the pump casing 1300 from the water inlet 1310, and is discharged through the water outlet 1320 after being pressurized by the first centrifugal impeller 1100 and the second centrifugal impeller 1200 in turn, thereby effectively improving the head of the water flow.

As shown in FIG7 , the first centrifugal impeller 1100 includes a first front cover plate 1110, a first rear cover plate 1130 and a first blade 1120. A first inlet 1111 is provided at the center of the first front cover plate 1110, a first outlet 1140 is provided at the periphery of the first front cover plate 1110 and the periphery of the first rear cover plate 1130, and the first blade 1120 is provided between the first front cover plate 1110 and the first rear cover plate 1130. The first front cover plate 1110, the first rear cover plate 1130 and the first blade 1120 form an integrated structure. Generally speaking, in order to reduce the friction between the first centrifugal impeller 1100 and the support shaft 2110, the first centrifugal impeller 1100 is further provided with a first bearing 1150. The first bearing 1150 may be a graphite bearing. The first bearing 1150 and the first centrifugal impeller 1100 form an integrated structure. For example, the first bearing 1150 is placed in a mold, and the mold is injection molded to form a first rear cover plate 1130 and a first blade 1120. At this time, the first rear cover plate 1130 and the first blade 1120 are combined into one with the first bearing 1150, and the first front cover plate 1110 is injection molded separately, and then welded (ultrasonic welding) to the first blade 1120.

As shown in FIG8 , the second centrifugal impeller 1200 includes a second front cover plate 1210, a second rear cover plate 1230 and a second blade 1220. A second inlet 1211 is provided at the center of the second front cover plate 1210, a second outlet 1240 is provided around the second front cover plate 1210 and the second rear cover plate 1230, and the second blade 1220 is provided between the second front cover plate 1210 and the second rear cover plate 1230. Generally speaking, in order to reduce the friction between the second centrifugal impeller 1200 and the support shaft 2110, a second bearing 1250 is further provided. The second bearing 1250 may be a graphite bearing. The second bearing 1250 and the second centrifugal impeller 1200 form an integrated structure. As mentioned above, the second centrifugal impeller 1200, the shaft portion 3000, the rib 3100 and the rotor 2200 form an integrated structure. For example, the rotor 2200 includes a bracket 2210 and a magnet 2220. The shaft portion 3000 is arranged at one end of the bracket 2210, and the magnet 2220 is arranged on the bracket 2210 and surrounds the bracket 2210. The magnet 2220 and the second bearing 1250 are placed in a mold, and injection molding is performed in the mold to simultaneously form the bracket 2210, the shaft portion 3000, the rib 3100, the second rear cover plate 1230 and the second rear blade. The second front cover plate 1210 is manufactured separately and fixed to the second blade 1220 by welding (such as ultrasonic welding). In this way, the second centrifugal impeller 1200, the shaft portion 3000, the rib 3100, the rotor 2200 and the second bearing 1250 form an integrated structure, which effectively enhances the structural strength.

The present application also discloses a water heater 200. As shown in Figures 1, 2 and 12, the water heater 200 includes a water pump 100, which is arranged on the water path of the water heater 200. The water pump 100 includes a motor 2000, a centrifugal impeller 1200 and a convex rib 3100. The motor 2000 includes a rotor 2200 and a stator 2100. The rotor 2200 is rotatably arranged in the stator 2100, and the rotor 2200 is provided with a rotating shaft portion 3000. The centrifugal impeller 1200 is arranged on the rotating shaft portion 3000, and the centrifugal impeller 1200 can be driven by the rotor 2200 and rotate along with the rotation of the rotor 2200. The convex rib 3100 is arranged on the rotating shaft portion 3000, and the convex rib 3100 is arranged between the rotor 2200 and the centrifugal impeller 1200.

By providing the ribs 3100 on the rotating shaft 3000, when the rotor 2200 rotates, the rotor 2200 not only drives the centrifugal impeller 1200 to rotate, but also drives the ribs 3100 to rotate. The rotation of the ribs 3100 drives the water flow to rotate along with the rotating shaft 3000, so that the water flow between the centrifugal impeller 1200 and the rotor 2200 forms a vortex, and the vortex causes the sediment in the water flow to be retained (retained at the location where the vortex is located), preventing a large amount of sediment from entering the gap between the rotor 2200 and the stator 2100 and causing the rotor 2200 to be stuck, thereby ensuring the normal rotation of the rotor 2200. It can be understood that the water heater 200 includes the water pump 100 of the above embodiment, and the water pump 100 of the water heater 200 of this embodiment adopts the technical solution of the above embodiment, so it at least has the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made based on the concept of the present application and the contents of the present application description and drawings, or direct/indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims (15)

1. A water pump, comprising:

The motor comprises a stator and a rotor, wherein the rotor is rotatably arranged in the stator, and the rotor is provided with a rotating shaft part;

The centrifugal impeller is arranged on the rotating shaft part and is suitable for rotating under the drive of the rotor; and

And the convex ribs are arranged on the rotating shaft part and positioned between the centrifugal impeller and the rotor.

2. The water pump of claim 1, wherein the bead extends in an axial direction of the rotating shaft portion.

3. The water pump of claim 2, wherein the ribs extend from the centrifugal impeller to the rotor.

4. The water pump of claim 1, wherein the number of ribs is plural, and the plural ribs are arranged alternately in the circumferential direction of the rotating shaft portion.

5. The water pump of claim 4, wherein a plurality of the ribs are uniformly distributed along a circumferential direction of the rotating shaft portion.

6. The water pump of claim 4, wherein the ribs are centrally symmetrical about the shaft portion.

7. The water pump of claim 1, wherein a side of the bead facing away from the rotating shaft portion is linear in an axial direction of the rotating shaft portion.

8. The water pump of claim 1, wherein the bead is provided with a cavity open away from the shaft portion.

9. The water pump of claim 8, wherein the cavity is higher near a cavity wall of the centrifugal impeller than the cavity is near a cavity wall of the rotor.

10. The water pump of claim 9, wherein the inclination of the cavity near the cavity wall of the centrifugal impeller is greater than the inclination of the cavity near the cavity wall of the rotor.

11. The water pump of claim 1, wherein an annular space is provided between the centrifugal impeller and the rotor around the shaft portion.

12. The water pump of claim 11, wherein the annular space is defined by the centrifugal impeller, the rotor, and the shaft portion.

13. The water pump of claim 12, wherein the ribs are spaced a predetermined distance from the edge of the rotor and the edge of the centrifugal impeller in a radial direction of the rotating shaft portion.

14. The water pump of claim 1, wherein the centrifugal impeller, the rotating shaft portion, the rotor, and the ribs form an integral structure.

15. A water heater comprising a water pump as claimed in any one of claims 1 to 14.