Water pump rotor structure, water pump and water heater

Abstract

The utility model discloses a water pump rotor structure, a water pump and a water heater, the water pump rotor structure comprises a rotor and a centrifugal impeller, the rotor is suitable for being installed in a stator, the centrifugal impeller is arranged on the rotor, and the centrifugal impeller and the rotor form an integrated structure. The number of parts can be effectively reduced, the assembly efficiency is improved, the integrated structure of the centrifugal impeller and the rotor can be achieved through related equipment in the production process, manual assembly is not needed, and therefore errors are effectively reduced, and due to integration of the centrifugal impeller and the rotor, the structural strength and stability can be effectively improved; the water pump rotor structure is especially suitable for high-speed rotation working conditions and avoids abnormal vibration of a water pump.

Description

Technical Field

[0001] The present application relates to the technical field of fluid pumping, and in particular to a water pump rotor structure, a water pump and a water heater. Background Art

[0002] The motor of the water pump drives the centrifugal impeller to rotate, thereby achieving the suction of the water flow. In the related technology, when assembling the water pump, it is necessary to put the various components together to form a rotor, and then assemble and connect the rotor and the centrifugal impeller. The manual assembly of multiple components is inefficient, there are large assembly errors, and the strength and stability are also poor. Utility Model Content

[0003] 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 rotor structure.

[0004] To achieve the above objectives, the present application discloses a water pump rotor structure, which includes:

[0005] a rotor adapted to be mounted within the stator; and

[0006] The centrifugal impeller is arranged on the rotor and forms an integral structure with the rotor.

[0007] In some embodiments of the present application, the rotor includes a bracket, a magnet and a sleeve, and the centrifugal impeller includes a front cover plate, a rear cover plate and blades;

[0008] The bracket, the rear cover plate and the blades are integrally formed by injection molding and combined with the magnet and the shaft sleeve by injection molding, and the front cover plate and the blades are welded.

[0009] In some embodiments of the present application, the magnet surrounds the bracket, and a concave-convex structure is formed at the junction of the magnet and the bracket.

[0010] In some embodiments of the present application, the magnet surrounds the bracket, the bracket has a first stop portion, and the magnet abuts against the first stop portion along the axial direction of the rotor.

[0011] In some embodiments of the present application, the magnet surrounds the bracket;

[0012] The circumferential surface of the magnet constitutes at least a part of the circumferential surface of the rotor, and / or the end surface of the magnet constitutes at least a part of the end surface of the rotor.

[0013] In some embodiments of the present application, the sleeve is disposed in the rotor, the bracket has a second stop portion, and one end of the sleeve close to the centrifugal impeller abuts against the second stop portion along the axial direction of the rotor.

[0014] In some embodiments of the present application, along the axial direction of the rotor, the length of the integrated structure formed by the centrifugal impeller and the rotor is L 11 , the length of the sleeve is L 12 , meet 0.3L 11 ≤L 12 ≤0.7L 11 .

[0015] In some embodiments of the present application, the distance between the end surface of the centrifugal impeller facing away from the rotor and the shaft sleeve is not less than 0.2L 11 And no more than 0.4L 11 The distance between the end face of the rotor away from the centrifugal impeller and the shaft sleeve is not less than 0.2L 11 And no more than 0.4L 11 .

[0016] The present application also discloses a water pump, which includes a stator and the water pump rotor structure. The stator is provided with a support shaft, and the water pump rotor structure is rotatably sleeved on the support shaft.

[0017] In some embodiments of the present application, the stator has a support column, the support shaft is inserted into the support column, and the water pump further includes a gasket sleeved on the support shaft, the gasket abuts against the support column and stops the shaft sleeve.

[0018] The present application also discloses a water heater, which comprises the water pump mentioned above.

[0019] The technical solution of the present application can effectively reduce the number of parts and improve assembly efficiency when assembling a water pump by designing the centrifugal impeller and the rotor into an integrated structure. The integrated structure of the centrifugal impeller and the rotor can be realized by related equipment during the production process, and does not require manual assembly, thereby effectively reducing errors. In addition, the integration of the centrifugal impeller and the rotor can effectively improve the structural strength and stability, and is particularly suitable for high-speed rotation conditions of the water pump rotor structure, avoiding abnormal vibration of the water pump.

[0020] 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

[0021] 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.

[0022] Figure 1 A schematic diagram of a water pump in some embodiments;

[0023] Figure 2 An exploded view of a water pump in some embodiments;

[0024] Figure 3 A cross-sectional view of a water pump in some embodiments;

[0025] Figure 4 It is a cross-sectional view of a local structure of a water pump in some embodiments;

[0026] Figure 5 It is a schematic diagram of the partial structure of a water pump in some embodiments;

[0027] Figure 6 Schematic diagram of the structure of a water pump rotor in some embodiments;

[0028] Figure 7 It is an exploded view of the water pump rotor structure in some embodiments;

[0029] Figure 8 A cross-sectional view of a water pump rotor structure in some embodiments;

[0030] Fig. 9 Schematic diagram of a water heater in some embodiments.

[0031] Description of Figure Numbers:

[0032] Water pump 100, water heater 200, pump body 1000, first centrifugal impeller 1100, centrifugal impeller / second centrifugal impeller 1200, front cover plate 1210, inlet 1211, blades 1220, rear cover plate 1230, outlet 1240, pump casing 1300, water inlet 1310, water outlet 1320, motor 2000, rotor 2100, bracket 2110, first stopper 2111, second stopper 2112, magnet 2120, circumferential surface 2121, end surface 2122, bushing 2130, stator 2200, support column 2210, support shaft 3100, gasket 3200.

[0033] 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

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The first aspect of the present application provides a water pump rotor structure, which is applied to a water pump 100 and is combined with Figure 6 As shown, the water pump rotor structure includes a rotor 2100 and a centrifugal impeller 1200. The rotor 2100 is used to be installed in the stator 2200 and rotates under the action of the stator 2200. The centrifugal impeller 1200 is arranged on the rotor 2100, and the centrifugal impeller 1200 and the rotor 2100 form an integrated structure. The rotor 2100 can drive the centrifugal impeller 1200 to rotate, thereby realizing the suction of the water flow.

[0039] By designing the centrifugal impeller 1200 and the rotor 2100 as an integrated structure, the number of parts can be effectively reduced and the assembly efficiency can be improved when assembling the water pump 100. The integrated structure of the centrifugal impeller 1200 and the rotor 2100 can be realized by related equipment during the production process, and no manual assembly is required, thereby effectively reducing errors. In addition, the integration of the centrifugal impeller 1200 and the rotor 2100 can effectively improve the structural strength and stability, and is particularly suitable for high-speed rotation conditions of the water pump rotor structure, thereby avoiding abnormal vibration of the water pump 100.

[0040] Specifically, combined Figure 1 , Figure 2 and Figure 3 As shown, the water pump 100 includes a pump body 1000 and a motor 2000, and the pump body 1000 and the motor 2000 are assembled together. The pump body 1000 includes a pump housing 1300 and a centrifugal impeller 1200. The pump housing 1300 is used to form a cavity for pumping water flow, and the pump housing 1300 is provided with a water inlet 1310 and a water outlet 1320. The pump housing 1300 can be made of plastic material or other materials. In order to meet different installation requirements, the pump housing 1300 can be an integrally formed structure or a split connection structure, and can be a regular shape or an irregular shape. The centrifugal impeller 1200 is arranged inside the pump housing 1300. The centrifugal impeller 1200 takes in water axially and discharges water radially. When the centrifugal impeller 1200 rotates, it can drive the water flow from the water inlet 1310 into the inside of the pump housing 1300, and discharge the water from the pump housing 1300 from the water outlet 1320.

[0041] The motor 2000 includes a rotor 2100 and a stator 2200 (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 2200 is assembled with the pump housing 1300. The assembly of the stator 2200 and the pump housing 1300 can be fixed to each other by screw fastening or other methods. The rotor 2100 is rotatably arranged inside the stator 2200, that is, the stator 2200 surrounds the rotor 2100. When the stator 2200 is powered on, it can drive the rotor 2100 to rotate. As the rotor 2100 rotates, the rotor 2100 can drive the centrifugal impeller 1200 to rotate synchronously.

[0042] In the related art, the rotor 2100 needs to be connected to the centrifugal impeller 1200 by driving, that is, the rotor 2100 and the centrifugal impeller 1200 are manufactured separately, and the rotor 2100 and the centrifugal impeller 1200 are respectively provided with structures connected to each other. When assembling the water pump 100, the operator assembles the rotor 2100 and the centrifugal impeller 1200 together. In addition, the rotor 2100 includes a plurality of parts, which are also assembled together by the operator. In this way, by assembling the plurality of parts together, a relatively large assembly error will be generated, which affects the structural strength and the stability of rotation, and is not conducive to improving the assembly efficiency of the water pump 100. To this end, the present application solves the problem by designing the centrifugal impeller 1200 and the rotor 2100 as an integrated structure.

[0043] It can be understood that the so-called integrated structure is that the centrifugal impeller 1200 and the rotor 2100 are combined into one in the process of production using production equipment, and there is no obvious connection seam between the various components. For example, the centrifugal impeller 1200 and the rotor 2100 are combined into one by welding, welding and / or injection molding. The integrated centrifugal impeller 1200 and the rotor 2100 do not need to be manually assembled later. When using production equipment for manufacturing, the accuracy of the production equipment can be controlled. Compared with the later manual assembly, it is more conducive to improving the assembly accuracy of the entire water pump rotor structure. The various components are not easy to be loose, which can effectively improve the structural strength and stability of the water pump rotor structure. When the water pump rotor structure rotates at a high speed, it is not easy to have abnormal noise and cause abnormal operation of the water pump 100. It is precisely because the centrifugal impeller 1200 and the rotor 2100 are combined into a whole that the number of components can be effectively reduced. When assembling the water pump 100, the production efficiency of the water pump 100 can be effectively improved.

[0044] Combination Figure 6 and Figure 7 As shown, the specific structure of the centrifugal impeller 1200 and the rotor 2100 is as follows: the centrifugal impeller 1200 includes a front cover plate 1210, blades 1220 and a rear cover plate 1230; the rotor 2100 includes a bracket 2110, a sleeve 2130 and a magnet 2120; the blades 1220, the rear cover plate 1230 and the bracket 2110 are integrally formed by injection molding, and are simultaneously combined with the sleeve 2130 and the magnet 2120 by injection molding; and the front cover plate 1210 is welded to the blades 1220, so that the front cover plate 1210, the blades 1220, the rear cover plate 1230, the bracket 2110, the sleeve 2130 and the magnet 2120 constitute an integral injection molding structure.

[0045] Specifically, an inlet 1211 is arranged at the center position of the front cover plate 1210, the front cover plate 1210 and the rear cover plate 1230 are arranged in an overlapping manner and at a certain distance from each other, an outlet 1240 is formed between the periphery of the front cover plate 1210 and the periphery of the rear cover plate 1230, and the blades 1220 are arranged between the front cover plate 1210 and the rear cover plate 1230. When the centrifugal impeller 1200 rotates, water enters the interior of the pump casing 1300 from the water inlet 1310, and then enters the interior of the centrifugal impeller 1200 through the inlet 1211, and is radially thrown out from the outlet 1240 under the action of the blades 1220, and then discharged from the pump casing 1300 through the water outlet 1320.

[0046] The bracket 2110 is a supporting base that supports various components. The magnet 2120 is sleeved on the bracket 2110, so that it rotates under the action of the stator 2200. The sleeve 2130 is arranged in the bracket 2110 to reduce the rotation resistance of the entire water pump rotor structure. It can be understood that in order to achieve the rotation support of the water pump rotor structure, the water pump 100 is provided with a support shaft 3100, one end of the support shaft 3100 is fixed to the stator 2200, and the other end is fixed to the pump housing 1300. The water pump rotor structure needs to be sleeved on the support shaft 3100. By setting the sleeve 2130, the sleeve 2130 and the support shaft 3100 are in contact, and the other parts of the water pump rotor structure do not contact the support shaft 3100. The sleeve 2130 reduces the rotation resistance and wear of the water pump rotor structure. Generally speaking, the material of the sleeve 2130 is graphite, and the material of the support shaft 3100 is ceramic.

[0047] The preparation method of the water pump rotor structure is as follows: the shaft sleeve 2130 and the magnet 2120 are placed in a mold, and then injection molding is performed on the mold. During the injection molding process, the bracket 2110, the rear cover plate 1230 and the blade 1220 are formed, and the injection molding material is synchronously combined with the shaft sleeve 2130 and the magnet 2120. Since the blade 1220 is located between the front cover plate 1210 and the rear cover plate 1230, the front cover plate 1210 is prepared by injection molding separately, and then fixed to the blade 1220 by welding (such as ultrasonic welding). In this way, the water pump rotor structure is prepared. It can be seen that the accuracy of the entire water pump rotor structure can be effectively improved by controlling the accuracy of the injection molding process. Compared with the later manual assembly, it is convenient and more reliable. The stability and structural strength of the water pump rotor structure formed in this way will be greatly improved.

[0048] In some embodiments of the present application, the magnet 2120 is designed to surround the bracket 2110, and a concave-convex structure is formed at the junction of the magnet 2120 and the bracket 2110, thereby enhancing the bonding strength between the magnet 2120 and the bracket 2110.

[0049] Specifically, the so-called concave-convex structure means that the surface where the magnet 2120 contacts the bracket 2110 is provided with a concave structure, the surface where the bracket 2110 contacts the magnet 2120 is provided with a convex structure, and the convex structure is embedded in the concave structure; it can also be that the surface where the magnet 2120 contacts the bracket 2110 is provided with a convex structure, the surface where the bracket 2110 contacts the magnet 2120 is provided with a concave structure, and the convex structure is embedded in the concave structure; it can also be that the surface where the magnet 2120 contacts the bracket 2110 is provided with a concave structure and a convex structure, the surface where the bracket 2110 contacts the magnet 2120 is provided with a convex structure and a concave structure, and the corresponding convex structure is embedded in the corresponding concave structure. Since the magnet 2120 surrounds the bracket 2110, when the water pump rotor structure rotates at a high speed, the magnet 2120 is subjected to a greater force. By designing the concave-convex structure, the bonding strength between the magnet 2120 and the bracket 2110 can be increased, and the magnet 2120 is not easy to loosen.

[0050] Of course, the magnet 2120 and the bracket 2110 can also improve the bonding strength by the following scheme: Figure 7 and Figure 8 As shown, in some embodiments of the present application, the magnet 2120 is designed to surround the bracket 2110, and the bracket 2110 is provided with a first stop portion 2111, and along the axial direction of the rotor 2100, the magnet 2120 abuts against the first stop portion 2111, which can also improve the structural strength of the magnet 2120 and the bracket 2110.

[0051] Specifically, the first stop portion 2111 extends along the radial direction of the rotor 2100 (the first stop portion 2111 is formed when the bracket 2110 is injection molded). Since the magnet 2120 needs to surround the bracket 2110, the magnet 2120 is in contact with the first stop portion 2111 at the same time under the premise that the magnet 2120 surrounds the bracket 2110. In this way, the magnet 2120 is limited in the axial direction of the rotor 2100. The magnet 2120 generates a force perpendicular to the first stop portion 2111 on the first stop portion 2111 along the axial direction of the rotor 2100. The first stop portion 2111 has a better stopping and limiting effect. It is through the setting of the first stop portion 2111 that the inner wall and end face of the magnet 2120 are respectively in contact and combined with the bracket 2110, effectively increasing the contact area, thereby ensuring the combining force. Of course, by forming a concave-convex structure at the junction of the magnet 2120 and the bracket 2110 and simultaneously providing the first stopper 2111 , the combination firmness between the bracket 2110 and the magnet 2120 can be further improved.

[0052] Combination Figure 6 , Figure 7 and Figure 8As shown, in some embodiments of the application, the magnet 2120 is designed to surround the bracket 2110, and the circumferential surface 2121 of the magnet 2120 is designed to constitute at least a part of the circumferential surface of the rotor 2100, which can effectively improve the structural strength of the bracket 2110.

[0053] Specifically, the water pump rotor structure needs to be sleeved on the support shaft 3100 through the sleeve 2130, that is, the sleeve 2130 and the support shaft 3100 can be rotatably contacted, and the bracket 2110 needs to simultaneously realize the combination of the sleeve 2130 and the magnet 2120. For this reason, in this embodiment, the circumferential surface 2121 of the magnet 2120 is designed to constitute at least a part of the circumferential surface of the rotor 2100. Then, along the radial direction of the rotor 2100, the part of the bracket 2110 used to combine the magnet 2120 and the sleeve 2130 can be completely located between the magnet 2120 and the sleeve 2130, thereby ensuring that the part of the bracket 2110 has a larger thickness, thereby effectively realizing the combination of the magnet 2120 and the sleeve 2130 and ensuring a certain structural strength.

[0054] Furthermore, in some embodiments of the present application, the end face 2122 of the magnet 2120 is designed to constitute at least a portion of the end face of the rotor 2100. It can be understood that along the axial direction of the rotor 2100, the rotor 2100 has a certain size. Under the premise that the bracket 2110 has a first stop portion 2111, if the bracket 2110 still wraps the end face 2122 of the magnet 2120 in the axial direction, then the part of the bracket 2110 that wraps the end face 2122 of the magnet 2120 needs to be designed to be thinner, otherwise the size of the rotor 2100 along the axial direction of the rotor 2100 needs to be increased, which is not conducive to miniaturization.

[0055] Combination Figure 8 As shown, in some embodiments of the present application, the sleeve 2130 is disposed in the rotor 2100, and the bracket 2110 has a second stop portion 2112, and one end of the sleeve 2130 close to the centrifugal impeller 1200 is designed to abut against the second stop portion 2112 along the axial direction of the rotor 2100, thereby improving the bonding strength between the sleeve 2130 and the bracket 2110.

[0056] Specifically, the second stopper 2112 is formed inside the bracket 2110 and surrounds the rotation axis of the bracket 2110 to form a step structure (the second stopper 2112 is formed when the bracket 2110 is injection molded). When the sleeve 2130 is arranged inside the bracket 2110, it can abut against the second stopper 2112 in the axial direction of the rotor 2100, thereby increasing the contact area between the bracket 2110 and the sleeve 2130, effectively improving the bonding strength between the bracket 2110 and the sleeve 2130, and the bracket 2110 and the sleeve 2130 are not easily separated along the axial direction of the rotor 2100. For example, during injection molding, the sleeve 2130 is placed in the mold, and the mold has a structure for forming the second stopper 2112 accordingly. When the bracket 2110 is injection molded, the second stopper 2112 can abut against the sleeve 2130.

[0057] Continue to combine Figure 8 As shown, in some embodiments of the present application, the length of the integrated structure formed by the centrifugal impeller 1200 and the rotor 2100 along the axial direction of the rotor 2100 is L 11 , and the length of the sleeve 2130 along the axial direction of the rotor 2100 is L 12 , meet 0.3L 11 ≤L 12 ≤0.7L 11 .

[0058] Specifically, since the rotor 2100 needs to cooperate with the stator 2200, the rotor 2100 drives the centrifugal impeller 1200 to rotate, and the centrifugal impeller 1200 cannot interfere with the stator 2200. Therefore, the integrated structure formed by the centrifugal impeller 1200 and the rotor 2100 has a certain length L. 11 (i.e., the maximum length along the axial direction of the rotor 2100), since the integral structure formed by the centrifugal impeller 1200 and the rotor 2100 needs to be rotatably sleeved to the support shaft 3100 through the same sleeve 2130, the number of sleeves 2130 can be reduced, and the length L of the sleeve 2130 can be reduced by 12 Designed to be L 11 The contact between the sleeve 2130 and the support shaft 3100 is reduced in the axial direction of the rotor 2100 (i.e., the axial direction of the support shaft 3100), thereby reducing the error of the sleeve 2130 due to manufacturing accuracy problems (the longer the sleeve 2130 is, the greater the error is), thereby avoiding abnormal wear between the sleeve 2130 and the support shaft 3100 and causing rotation jamming. In particular, in this embodiment, by satisfying 0.3L 11 ≤L 12 ≤0.7L 11, which can not only reduce errors, but also enable the sleeve 2130 to effectively support the rotation of the entire water pump rotor structure. On the basis of ensuring that the sleeve 2130 can achieve its supporting and lubricating functions, it can effectively reduce errors and friction losses (the longer the sleeve 2130 is, the larger the contact area between the sleeve 2130 and the support shaft 3100 is, and the more friction losses are caused).

[0059] Further, continue to combine Figure 8 As shown, in some embodiments of the present application, the distance between the end surface of the centrifugal impeller 1200 facing away from the rotor 2100 and the shaft sleeve 2130 is L 13 , meet 0.2L 11 ≤L 13 ≤0.4L 11 The distance between the end surface of the rotor 2100 facing away from the centrifugal impeller 1200 and the sleeve 2130 is L 14 , meet 0.2L 11 ≤L 14 ≤0.4L 11 By such an arrangement, the shaft sleeve 2130 is centered as much as possible relative to the entire water pump rotor structure, thereby further improving the rotation support for the entire water pump rotor structure, and the rotation of the water pump rotor structure is more stable.

[0060] Specifically, the centrifugal impeller 1200 and the rotor 2100 are rotatably mounted on the support shaft 3100 through the same sleeve 2130, thereby reducing the number of sleeves 2130 and simplifying assembly. As mentioned above, the sleeve 2130 cannot be too long or too short. Therefore, in this embodiment, by satisfying 0.2L 11 ≤L 13 ≤0.4L 11 and 0.2L 11 ≤L 14 ≤0.4L 11 , so that the sleeve 2130 has a reasonable length, the sleeve 2130 is set in the center as much as possible, so that the center of gravity of the water pump rotor structure is as close to the sleeve 2130 as possible in space, thereby avoiding uneven weight distribution of the water pump rotor structure, which is beneficial to further reduce wear and improve rotation stability.

[0061] The second aspect of the present application discloses a water pump 100, which includes a stator 2200 and the water pump rotor structure of the above-mentioned embodiment. The water pump rotor structure includes a rotor 2100 and a centrifugal impeller 1200. The rotor 2100 is used to be installed in the stator 2200 and rotates under the action of the stator 2200. The centrifugal impeller 1200 is arranged on the rotor 2100, and the centrifugal impeller 1200 and the rotor 2100 form an integrated structure. The rotor 2100 can drive the centrifugal impeller 1200 to rotate, thereby realizing the suction of the water flow.

[0062] By designing the centrifugal impeller 1200 and the rotor 2100 as an integrated structure, the number of parts can be effectively reduced and the assembly efficiency can be improved when assembling the water pump 100. The integrated structure of the centrifugal impeller 1200 and the rotor 2100 can be realized by related equipment during the production process, and no manual assembly is required, thereby effectively reducing errors. In addition, the integration of the centrifugal impeller 1200 and the rotor 2100 can effectively improve the structural strength and stability, and is particularly suitable for high-speed rotation conditions of the water pump rotor structure, thereby avoiding abnormal vibration of the water pump 100.

[0063] Specifically, the stator 2200 is provided with a support shaft 3100, the other end of the support shaft 3100 extends into the pump housing 1300 of the water pump 100 and is fixed by the pump housing 1300, and the water pump rotor structure is rotatably sleeved on the support shaft 3100. Figure 2 and Figure 3 As shown, Figure 2 and Figure 3 The water pump 100 includes a first centrifugal impeller 1100 and a second centrifugal impeller 1200. The second centrifugal impeller 1200 is the centrifugal impeller 1200 mentioned above. The first centrifugal impeller 1100 can be rotatably sleeved on the support shaft 3100 and is transmission-connected with the second centrifugal impeller 1200, so as to realize step-by-step pressurization of the water flow. There are many 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, the 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 greatly improving the head of the water flow.

[0064] Furthermore, combined with Figure 4 and Figure 5As shown, the stator 2200 includes a support column 2210, and the support shaft 3100 is fixed by being inserted into the support column 2210. The water pump 100 also includes a gasket 3200, which is sleeved on the support shaft 3100, one side of the gasket 3200 abuts against the support column 2210, and the other side of the gasket 3200 stops the shaft sleeve 2130. As mentioned above, the second stop portion 2112 of the bracket 2110 abuts against one end of the sleeve 2130 close to the centrifugal impeller 1200, so that the other end of the sleeve 2130 can be exposed. When the water pump rotor structure is sleeved on the support shaft 3100, the sleeve 2130 and the gasket 3200 can be abutted together. When the water pump rotor structure rotates, the sleeve 2130 and the gasket 3200 cooperate to achieve limiting and reduce friction resistance. For example, the material of the sleeve 2130 is graphite, and the material of the gasket 3200 is ceramic.

[0065] The third aspect of the present application discloses a water heater 200, Figure 1 and Fig. 9 As shown, the water heater 200 includes the water pump 100 described above, and the water pump 100 is arranged on the water path of the water heater 200. It can be understood that the water heater 200 in this embodiment adopts the water pump 100 of the above embodiment, and the water pump 100 adopts the technical solution of the above embodiment, so it has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0066] 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

1. A water pump rotor structure, characterized in that: include: A rotor adapted to be mounted within the stator; as well as A centrifugal impeller is disposed on the rotor and forms an integral structure with the rotor; The rotor comprises a bracket, a magnet and a sleeve, and the centrifugal impeller comprises a front cover plate, a rear cover plate and blades; The bracket, the rear cover plate and the blades are integrally formed by injection molding and combined with the magnet and the shaft sleeve by injection molding, and the front cover plate and the blades are welded.

2. The water pump rotor structure according to claim 1, characterized in that: The magnet surrounds the bracket, and a concave-convex structure is formed at the junction of the magnet and the bracket.

3. The water pump rotor structure according to claim 1, characterized in that: The magnet surrounds the bracket, the bracket has a first stopper, and the magnet abuts against the first stopper along the axial direction of the rotor.

4. The water pump rotor structure according to claim 1, characterized in that: The magnet surrounds the bracket; The circumferential surface of the magnet constitutes at least a part of the circumferential surface of the rotor, and / or the end surface of the magnet constitutes at least a part of the end surface of the rotor.

5. The water pump rotor structure according to claim 1, characterized in that: The shaft sleeve is arranged in the rotor, the bracket has a second stopper, and one end of the shaft sleeve close to the centrifugal impeller abuts against the second stopper along the axial direction of the rotor.

6. The water pump rotor structure according to claim 1, characterized in that: Along the axial direction of the rotor, the length of the integrated structure formed by the centrifugal impeller and the rotor is L 11 , the length of the sleeve is L 12 , meet 0.3L 11 ≤L 12 ≤0.7L 11 .

7. The water pump rotor structure according to claim 6, characterized in that: The distance between the end surface of the centrifugal impeller away from the rotor and the shaft sleeve is not less than 0.2L 11 And no more than 0.4L 11 The distance between the end face of the rotor away from the centrifugal impeller and the shaft sleeve is not less than 0.2L 11 And no more than 0.4L 11 .

8. A water pump, characterized in that: The water pump comprises a stator and a water pump rotor structure according to any one of claims 1 to 7, wherein the stator is provided with a support shaft, and the water pump rotor structure is rotatably sleeved on the support shaft.

9. The water pump according to claim 8, characterized in that The stator has a support column, the support shaft is inserted into the support column, and the water pump also includes a gasket sleeved on the support shaft, the gasket abuts against the support column and stops the shaft sleeve.

10. A water heater, characterized in that: Including the water pump described in claim 8 or 9.

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