Efficient mute miniature water pump

Abstract

The utility model relates to an efficient mute miniature water pump which comprises a metal shell, a front sealing cover and a rear sealing cover. The front sealing cover and the rear sealing cover seal the front end and the rear end of the metal shell. The water outlet cover is arranged on the front sealing cover, the rotating shaft is coaxially arranged in the metal shell, the magnetic steel is coaxially arranged on the rotating shaft, the magnetic steel sleeve is arranged on the outer side of the magnetic steel in a sleeving mode, and the stator excitation winding is coaxially arranged on the inner wall of the metal shell and used for driving the magnetic steel to rotate. A supporting sleeve is coaxially arranged on the outer side of the magnetic steel sleeve, and the outer side wall of the supporting sleeve is tightly attached to the inner side wall of the stator exciting winding. The rear end of the rotating shaft is rotationally connected with the rear sealing cover, and the front end penetrates through the front sealing cover; an impeller coaxially fixed with the rotating shaft is arranged in the water outlet cover; a water outlet and a water inlet are respectively formed in the front end surface and the side wall of the water outlet cover; the stator excitation winding is directly fixed on the inner wall of the metal shell and is matched with the magnetic steel to drive the rotating shaft to rotate, so that the arrangement of a winding slot body is avoided, and the vibration and noise caused by a tooth slot effect are further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a high-efficiency and silent micro water pump. Background Art

[0002] At present, the motors of existing micro water pumps have the following problems: 1. The motors commonly used in micro water pumps are iron-core brushed motors, which have a short service life, high noise, and low efficiency; 2. Some use brushless motors to achieve, but this kind of motor only solves the service life problem. However, since this kind of motor belongs to a slotted motor, it still has high noise, low efficiency, and low power density during operation. Due to the structure of the winding slots, the volume cannot be further reduced, and it cannot be applied in narrow spaces. Therefore, it is necessary to improve the existing micro water pumps. Content of the Utility Model

[0003] The purpose of the utility model is to provide a high-efficiency and silent micro water pump for the deficiencies of the existing technology, which can well solve the above problems.

[0004] To achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:

[0005] Provide a high-efficiency and silent micro water pump, including a cylindrical metal shell, and a front seal cover and a rear seal cover for sealing the front and rear ends of the metal shell; it also includes a water outlet cover provided on the front seal cover, a rotating shaft coaxially provided in the metal shell, a magnetic steel provided on the rotating shaft coaxially, a magnetic steel sleeve sleeved outside the magnetic steel, and a stator excitation winding provided coaxially in a cylindrical shape on the inner wall of the metal shell and used to drive the magnetic steel to rotate; a support sleeve is coaxially provided outside the magnetic steel sleeve, and the outer side wall of the support sleeve is closely attached to the inner side wall of the stator excitation winding; the rear end of the rotating shaft is rotatably connected to the rear seal cover, and the front end penetrates through the front seal cover; an impeller coaxially fixed to the rotating shaft is provided in the water outlet cover; a water outlet and a water inlet are respectively provided on the front end face and the side wall of the water outlet cover.

[0006] In the high-efficiency and silent micro water pump of the utility model, sealing members for sealing the magnetic steel are provided at both ends of the magnetic steel sleeve.

[0007] In the high-efficiency and silent micro water pump of the utility model, gaskets corresponding to the sealing members are provided on the front seal cover and the rear seal cover, and the gaskets are coaxially arranged with the rotating shaft.

[0008] In the high-efficiency and silent micro water pump of the utility model, bearings are coaxially provided at both ends of the rotating shaft, and the two bearings are respectively provided on the front seal cover and the rear seal cover.

[0009] For the high-efficiency silent micro water pump of the present utility model, positioning grooves are respectively provided on the front seal cover and the rear seal cover corresponding to the two bearings. The depth of the positioning groove is the same as the axial length of the bearing. The outer diameter of the gasket is the same as the outer diameter of the bearing. Both the bearing and the seal are in sliding contact with both sides of the corresponding gasket.

[0010] For the high-efficiency silent micro water pump of the present utility model, the axial length of the stator excitation winding is greater than the axial length of the magnet. The axial length of the magnet sleeve is greater than the axial length of the stator excitation winding.

[0011] For the high-efficiency silent micro water pump of the present utility model, an insulating liquid is provided inside the metal shell.

[0012] For the high-efficiency silent micro water pump of the present utility model, annular positioning steps are respectively formed on the outer side walls of the front seal cover and the rear seal cover corresponding to the metal shell by recessing. A sealing ring is provided between the annular positioning step and the inner wall of the metal shell. A sealing groove adapted to the sealing ring is provided on the annular positioning step.

[0013] For the high-efficiency silent micro water pump of the present utility model, an annular boss for positioning the water outlet cover is coaxially provided on the front end face of the front seal cover.

[0014] For the high-efficiency silent micro water pump of the present utility model, a water inlet pipe and a water outlet pipe are respectively provided on the water outlet cover corresponding to the water inlet and the water outlet. The water inlet pipe is eccentrically arranged on the water outlet cover.

[0015] The beneficial effects of the present utility model are as follows: By directly fixing the tubular hollow cup-shaped stator excitation winding on the inner wall of the metal shell to cooperate with the magnet to drive the rotation of the rotating shaft, the setting of the winding core is avoided, which not only reduces the jitter and noise caused by the cogging effect, but also greatly reduces the overall volume, and is more suitable for occasions with small volume requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will further illustrate the present utility model in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0017] Figure 1 is the overall view of the high-efficiency silent micro water pump of the present utility model.

[0018] Figure 2 is Figure 1 the exploded view of.

[0019] Figure 3 It is the front view of the high-efficiency silent micro water pump of the present utility model.

[0020] Figure 4 It is Figure 3 the A-A sectional view of

[0021] Figure 5 It is Figure 3 the B-B sectional view of Specific embodiments

[0022] Terms such as "first", "second", "third", and "fourth" in the description and claims of the present invention and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0023] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0024] "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0025] Moreover, terms indicating directions such as "upper, lower, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the posture position of the device or equipment described in this solution during normal use.

[0026] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] The high-efficiency silent micro water pump of the preferred embodiment of the utility model is as follows Figures 1-5 As shown, this water pump includes a cylindrical metal shell 10, and a front seal cover 20 and a rear seal cover 30 that seal the front and rear ends of the metal shell 10; this water pump also includes a water outlet cover 40 covering the front seal cover 20, a rotating shaft 50 coaxially arranged inside the metal shell 10, a magnetic steel 60 arranged coaxially on the rotating shaft 50, a magnetic steel sleeve 70 sleeved outside the magnetic steel 60, and a stator excitation winding 80 in a cylindrical shape and coaxially arranged on the inner wall of the metal shell 10 and used to drive the magnetic steel 60 to rotate; a support sleeve 90 is coaxially arranged outside the magnetic steel sleeve 70, and the outer side wall of the support sleeve 90 is closely attached to the inner side wall of the stator excitation winding 80 and fixes the stator excitation winding 80 on the inner wall of the metal shell 10; among them, the stator excitation winding 80, the magnetic steel 60 and the magnetic steel sleeve 70 are all in a cylindrical shape, so that the stator excitation winding 80 forms a hollow cup winding structure; the rear end of the rotating shaft 50 is rotatably connected to the rear seal cover 30, and the front end penetrates through the front seal cover 20; an impeller 100 coaxially fixed to the rotating shaft 50 is arranged inside the water outlet cover 40; a water outlet 110 and a water inlet 120 are respectively arranged on the front end face and the side wall of the water outlet cover 40; this water pump directly fixes the stator excitation winding 80 on the inner wall of the metal shell 10 to cooperate with the magnetic steel 60 to drive the rotating shaft 50 to rotate, avoiding the setting of the winding slot body, not only reducing the reduction of jitter and noise caused by the cogging effect, but also greatly reducing the overall volume, and being more suitable for occasions with requirements for small volume.

[0028] In this embodiment, sealing members 130 for sealing the magnetic steel 60 are arranged at both ends of the magnetic steel sleeve 70 to seal the magnetic steel 60 inside the magnetic steel sleeve 70 and prevent the magnetic steel 60 from rusting.

[0029] In this embodiment, gaskets 140 are arranged on the front seal cover 20 and the rear seal cover 30 corresponding to the sealing members 130, and the gaskets 140 are coaxially arranged with the rotating shaft 50 to play a role in isolating the sealing members 130 from the front seal cover 20 and the rear seal cover 30 and reducing wear; further, bearings 150 are coaxially arranged at both ends of the rotating shaft 50, and the two bearings 150 are respectively arranged on the front seal cover 20 and the rear seal cover 30. Specifically, positioning grooves 151 corresponding to the two bearings 150 are arranged on the front seal cover 20 and the rear seal cover 30 respectively, the depth of the positioning grooves 151 is the same as the axial length of the bearings 150, the outer diameter of the gaskets 140 is the same as the outer diameter of the bearings 150, and the bearings 150 and the sealing members 130 are both slidably attached to both sides of the corresponding gaskets 140 to avoid direct contact between the sealing members 130 and the bearings 150 and cause wear, ensuring the service life of the water pump. Among them, the sealing member 130 is epoxy sealant.

[0030] In this embodiment, the axial length of the stator excitation winding 80 is greater than the axial length of the permanent magnet 60, and the axial length of the permanent magnet sleeve 70 is greater than the axial length of the stator excitation winding 80. As a result, annular cavities 101 are formed at both ends of the stator excitation winding 80. Further, when insulating liquid is provided in the metal housing 10, the annular cavities 101 can be filled with the insulating liquid to evenly distribute the heat flow generated by the stator excitation winding 80 and prevent local overheating.

[0031] In this embodiment, annular positioning steps 170 are correspondingly formed by recessing on the outer side walls of the front seal cover 20 and the rear seal cover 30 with respect to the metal housing 10. A sealing ring 210 is provided between the annular positioning steps 170 and the inner wall of the metal housing 10. A sealing groove 160 adapted to the sealing ring is provided on the annular positioning steps 170 to ensure the sealing performance and prevent liquid leakage and water ingress.

[0032] In this embodiment, an annular boss 180 for positioning the water outlet cover 40 is coaxially provided on the front end face of the front seal cover 20 to fix the water outlet cover 40 and ensure the stability of the connection and convenient assembly and positioning.

[0033] In this embodiment, a water inlet pipe 190 and a water outlet pipe 200 are respectively provided on the water outlet cover 40 corresponding to the water inlet 120 and the water outlet 110. The water inlet pipe 190 is eccentrically provided on the water outlet cover 40 to facilitate the connection of the water pipe.

[0034] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A high-efficiency silent micro water pump, characterized in that: It includes a cylindrical metal shell, and a front sealing cover and a rear sealing cover that seal the front and rear ends of the metal shell; it also includes a water outlet cover arranged on the front sealing cover, a rotating shaft coaxially arranged in the metal shell, a magnet coaxially arranged on the rotating shaft, and a magnetic steel sleeve sleeved on the outside of the magnetic steel, as well as a stator excitation winding that is cylindrical and coaxially arranged on the inner wall of the metal shell and is used to drive the magnetic steel to rotate; a support sleeve is coaxially arranged on the outer side of the magnetic steel sleeve, and the outer side wall of the support sleeve is tightly attached to the inner side wall of the stator excitation winding; the rear end of the rotating shaft is rotatably connected to the rear sealing cover, and the front end passes through the front sealing cover; an impeller coaxially fixed with the rotating shaft is arranged in the water outlet cover; a water outlet and a water inlet are respectively arranged on the front end surface and side wall of the water outlet cover.

2. The high-efficiency silent micro water pump according to claim 1 is characterized in that: Both ends of the magnetic steel sleeve are provided with sealing members for sealing the magnetic steel.

3. The high-efficiency silent micro water pump according to claim 2 is characterized in that: Gaskets are provided on the front sealing cover and the rear sealing cover corresponding to the sealing member, and the gaskets are coaxially arranged with the rotating shaft.

4. The high-efficiency silent micro water pump according to claim 3 is characterized in that: Bearings are coaxially arranged at both ends of the rotating shaft, and the two bearings are respectively arranged on the front sealing cover and the rear sealing cover.

5. The high-efficiency silent micro water pump according to claim 4 is characterized in that: The front sealing cover and the rear sealing cover are respectively provided with positioning grooves corresponding to the two bearings, the depth of the positioning grooves is the same as the axial length of the bearings, the outer diameter of the gasket is the same as the outer diameter of the bearings, and the bearings and the seals are slidably fitted with the two sides of the corresponding gaskets.

6. The high-efficiency silent micro water pump according to claim 1 is characterized in that: The axial length of the stator excitation winding is greater than the axial length of the magnetic steel, and the axial length of the magnetic steel sleeve is greater than the axial length of the stator excitation winding.

7. The high-efficiency silent micro water pump according to claim 6, characterized in that: Insulating liquid is arranged in the metal shell.

8. The high-efficiency silent micro water pump according to claim 1, characterized in that: The outer side walls of the front sealing cover and the rear sealing cover are both formed with annular positioning steps corresponding to the depressions of the metal shell, a sealing ring is provided between the annular positioning step and the inner wall of the metal shell, and a sealing groove adapted to the sealing ring is provided on the annular positioning step.

9. The high-efficiency silent micro water pump according to claim 1, characterized in that: An annular boss for positioning the water outlet cover is coaxially provided on the front end surface of the front sealing cover.

10. The high-efficiency silent micro water pump according to claim 1, characterized in that: The water outlet cover is provided with a water inlet pipe and a water outlet pipe corresponding to the water inlet and the water outlet, respectively, and the water inlet pipe is eccentrically arranged on the water outlet cover.

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