Low noise permanent magnet canned pump axial field oriented silicon steel end cap housing stator
Patent Information
- Application Number
- CN202521435052.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-09
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-07-09
AI Technical Summary
[0003]但传统永磁屏蔽水泵有如下主要缺点：1.成本较高：由于结构和材料的要求，屏蔽泵的成本通常高于传统泵，特别是当需要处理高温或高压介质时
[0013]本实用新型的低噪音永磁屏蔽泵轴向磁场取向硅钢端盖式机壳定子，其有益效果，具体体现在：取向硅钢导磁方向与定子齿铁心方向夹角为20度时，相当于定子斜槽，可有效地削弱齿谐波磁动势，而对基波磁动势的影响相对较小，可大大降低电磁噪声和振动。另外，在20°的斜槽角度范围内，由于改善了磁通在定子铁芯中的分布，减少了磁滞和涡流损耗，可大大降低铁损，永磁屏蔽电机的整体效率可提高0.5% - 1%。
Smart Images
Figure CN224790404U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of shielded pump technology, specifically, it relates to a low-noise permanent magnet shielded pump with an axial magnetic field oriented silicon steel end cap type stator. Background Technology
[0002] Traditional permanent magnet shielded water pumps, also known as shielded pumps, are seal-free pumps that combine the functions of a motor and a pump. They transmit power through magnetic coupling, achieving a shaft seal-free design and thus avoiding leakage problems that may be caused by traditional mechanical seals.
[0003] However, traditional permanent magnet canned water pumps have the following main disadvantages: 1. Higher cost: Due to structural and material requirements, canned pumps are generally more expensive than traditional pumps, especially when handling high-temperature or high-pressure media. 2. Difficult maintenance: Once a canned pump malfunctions, professional disassembly and repair are usually required due to its complex internal structure, making self-repair very difficult for users. 3. Bearing lubrication issues: Bearings rely on the medium for lubrication; excessive impurities or incompatible properties in the medium can affect bearing life. 4. Power limitation: In high-power applications, the limitations of magnetic coupling can restrict power output.
[0004] Traditional axial flux motors possess a range of unique advantages and disadvantages, primarily reflected in their structural design, performance, and application scenarios. However, traditional axial flux motors suffer from the following drawbacks: Cost: The manufacturing cost of axial flux motors is generally higher than that of traditional radial flux motors, mainly due to the need for specific materials and manufacturing processes. For example, using a yokeless topology and specific stator-rotor designs increases costs. Utility Model Content
[0005] To address the aforementioned problems in the prior art, this utility model provides a low-noise permanent magnet shielded pump axial magnetic field oriented silicon steel end cap type stator.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: As one aspect of this utility model, a low-noise permanent magnet shielded pump axial magnetic field oriented silicon steel end-cap type stator is proposed, comprising: a front-end cap type annular housing, in which a first wound stator core is installed; a front stator mounting groove is formed on the right end face of the front-end cap type annular housing, and the first wound stator core is installed in the front stator mounting groove; a front disc stator shielding cover plate is installed on the groove end face of the front stator mounting groove; each of the first wound stator cores includes 12 front disc tooth cores and 1 front disc yoke core, the front disc tooth cores are installed on the front disc yoke core, and each front disc tooth core is wound with a front disc stator winding coil; the front disc stator winding coil is first installed on the front disc tooth core, and then the front disc tooth core is welded and fixed to the front disc yoke core to form the first wound stator core.
[0007] Furthermore, the front cover-type annular housing has through holes for the front disc type stator leads of the first wound stator core to pass through.
[0008] Furthermore, the first front disc stator lead with a wound stator core passes through the front disc stator shield cover.
[0009] Furthermore, the space between the first winding stator core, the front stator mounting groove, and the front disc stator shielding cover is filled with thermally conductive sealant to form an integrated waterproof disc stator.
[0010] Furthermore, the front disc yoke core is provided with welding holes. After the front disc tooth core is installed on the front disc yoke core, the welding holes are fully welded to connect the front disc tooth core and the front disc yoke core.
[0011] Furthermore, a front cover mounting hole is provided in the middle of the front cover annular housing, and a front silicon carbide bearing is installed in the front cover mounting hole.
[0012] Furthermore, a front retaining ring is installed in the front cover mounting hole, and the front retaining ring limits the installation of the front silicon carbide bearing in the front cover mounting hole.
[0013] This invention relates to a low-noise permanent magnet shielded pump with an axial magnetic field stator made of silicon steel end caps. The beneficial effects are specifically reflected in the following: when the magnetic direction of the silicon steel is at a 20-degree angle to the direction of the stator tooth core, it is equivalent to a stator skewed slot, which effectively weakens the tooth harmonic magnetomotive force while having a relatively small impact on the fundamental magnetomotive force, thus significantly reducing electromagnetic noise and vibration. Furthermore, within the 20° skewed slot angle range, the improved distribution of magnetic flux in the stator core reduces hysteresis and eddy current losses, significantly reducing iron losses and improving the overall efficiency of the permanent magnet shielded motor by 0.5% - 1%. Attached Figure Description
[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.
[0015] Figure 1 This is a structural cross-sectional view of the axial magnetic field oriented silicon steel end cap type stator of the low-noise permanent magnet shielded pump of this utility model. Figure 2 This is a right view of the structure of the axial magnetic field oriented silicon steel end cap type stator of the low-noise permanent magnet shielded pump of this utility model. Figure 3 This is a left view of the structure of the axial magnetic field oriented silicon steel end cap type stator of the low-noise permanent magnet shielded pump of this utility model. Figure 4 This is a schematic diagram of another perforation structure for the front disc type stator lead of this utility model; Figure 5 This is a schematic diagram of the magnetic conduction direction of the silicon steel in the front disc tooth core of this utility model. Figure 6 This is a schematic diagram of the insulating layer structure of this utility model; Figure 7 This is a cross-sectional view of the front disc toothed iron core of this utility model; Figure 8 This is a right view of the structure of the front disc toothed iron core of this utility model; Figure 9 This is a left view of the front disc tooth core structure of this utility model. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0017] One embodiment of this application provides a low-noise permanent magnet shielded pump stator with an axial magnetic field orientation silicon steel end cap type housing, such as... Figures 1-3 and Figures 5-9As shown, it includes: a front cover-type annular housing 212, in which a first wound stator core 213 is installed; a front stator mounting groove is formed on the right end face of the front cover-type annular housing 212; the first wound stator core 213 is installed in the front stator mounting groove; a front disc stator shielding cover plate 214 is installed on the groove end face of the front stator mounting groove; and the front disc stator lead wire 215 of the first wound stator core 213 passes through the front disc stator shielding cover plate 214. It should be noted that the front disc stator shielding cover plate 214 has through holes for the front disc stator lead wire 215 to pass through; the front disc stator lead wire 215 is made of heat-shrinkable Teflon material to achieve waterproof shielding performance. As an example, thermally conductive sealant 8 is filled between the first wound stator core 213, the front stator mounting groove and the front disc stator shielding cover 214 to form an integrated waterproof disc stator. Each of the first wound stator cores 213 includes 12 front disc toothed cores 2131 and 1 front disc yoke core 2132. The front disc toothed cores 2131 are mounted on the front disc yoke core 2132, and each of the front disc toothed cores 2131 is wound with a front disc stator winding coil 2133. For ease of assembly, the front disc stator winding coil 2133 is first mounted on the front disc toothed core 2131, and then the front disc toothed core 2131 is welded and fixed to the front disc yoke core. A first wound stator core 213 is formed on the core 2132; the front disc yoke core 2132 has welding holes, and after the front disc toothed core 2131 is installed on the front disc yoke core 2132, the welding holes are fully welded, making the connection between the front disc toothed core 2131 and the front disc yoke core 2132 more reliable; it should be noted that the structures of the front disc toothed core 2131, the front disc yoke core 2132 and the front disc stator winding coil 2133 are all existing known technologies, and will not be described in detail here; The front cover type annular housing 212 has a front cover mounting hole 218 in the middle, and a front silicon carbide bearing 216 is installed in the front cover mounting hole 218; a front retaining ring 217 is installed in the front cover mounting hole 218, and the front retaining ring 217 limits the installation of the front silicon carbide bearing 216 in the front cover mounting hole 218.
[0018] In one embodiment, such as Figure 4 As shown, the front cover-type annular housing 212 has a through hole for the front disc type stator lead 215 of the first wound stator core 213 to pass through.
[0019] The above design, equivalent to stator skew, effectively weakens the tooth harmonic magnetomotive force while having a relatively small impact on the fundamental magnetomotive force, significantly reducing electromagnetic noise and vibration. Furthermore, within a 20° skew angle range, the improved magnetic flux distribution in the stator core reduces hysteresis and eddy current losses, greatly reducing iron losses and improving the overall efficiency of the permanent magnet shielded motor by 0.5% - 1%. Traditional skew increases the straight length of the coil, increasing resistance, copper losses, and reducing efficiency. In this embodiment, the magnetic field direction forms an angle with the magnetic conduction direction of the oriented silicon steel core, and the core teeth are not skewed. Therefore, the diameter of the winding does not increase, the winding resistance remains unchanged, ensuring that the motor's copper losses do not increase and maintaining high efficiency.
[0020] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.
Claims
1. A low-noise permanent magnet shielded pump axial magnetic field oriented silicon steel end-cap type stator, characterized in that, It includes: A front-end cover-type annular housing (212) is provided, in which a first wound stator core (213) is installed. A front stator mounting groove is formed on the right end face of the front-end cover-type annular housing (212), and the first wound stator core (213) is installed within the front stator mounting groove. A front disc stator shielding cover plate (214) is installed on the groove opening end face of the front stator mounting groove. Each of the first wound stator cores (213) includes 12 front disc toothed cores (2...). 131) and a front disc yoke core (2132), the front disc tooth core (2131) is mounted on the front disc yoke core (2132), and a front disc stator winding coil (2133) is wound on each of the front disc tooth cores (2131); the front disc stator winding coil (2133) is first mounted on the front disc tooth core (2131), and then the front disc tooth core (2131) is welded and fixed on the front disc yoke core (2132) to form the first wound stator core (213).
2. The low-noise permanent magnet shielded pump axial magnetic field orientation silicon steel end cap type stator as described in claim 1, characterized in that, The front cover-type annular housing (212) has a through hole for the front disc type stator lead (215) of the first wound stator core (213) to pass through.
3. The low-noise permanent magnet shielded pump axial magnetic field orientation silicon steel end cap type stator as described in claim 1, characterized in that, The first front-plate stator lead (215) of the first wound stator core (213) passes through the front-plate stator shield cover (214).
4. The low-noise permanent magnet shielded pump axial magnetic field orientation silicon steel end cap type stator as described in claim 1, characterized in that, The first winding stator core (213), the front stator mounting groove and the front disc stator shielding cover (214) are filled with thermally conductive sealant (8) to form an integrated waterproof disc stator.
5. The low-noise permanent magnet shielded pump axial magnetic field orientation silicon steel end cap type stator as described in claim 1, characterized in that, The front disc yoke core (2132) has welding holes. After the front disc tooth core (2131) is installed on the front disc yoke core (2132), the welding holes are fully welded to connect the front disc tooth core (2131) and the front disc yoke core (2132).
6. The low-noise permanent magnet shielded pump axial magnetic field orientation silicon steel end cap type stator as described in claim 1, characterized in that, The front cover type annular housing (212) has a front cover mounting hole (218) in the middle, and a front silicon carbide bearing (216) is installed in the front cover mounting hole (218).
7. The low-noise permanent magnet shielded pump axial magnetic field orientation silicon steel end cap type stator as described in claim 6, characterized in that, A front retaining ring (217) is installed in the front cover mounting hole (218), and the front retaining ring (217) limits the installation of the front silicon carbide bearing (216) in the front cover mounting hole (218).