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Magnetic suspension pump based on hydraulic balance principle

A technology of hydraulic balance and magnetic levitation, which is applied to components, pumps, and pump devices of elastic fluid pumping devices. It can solve problems such as rotor axial impact, rotor rotation instability, and power limitation. The effect of stability, smooth water discharge and optimized structural design

Active Publication Date: 2021-07-20
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of the existing magnetic levitation pump water inlet water pressure fluctuations that cause the rotor to be subjected to a large impact in the axial direction, resulting in rotor rotation instability, pulsed water discharge, impure water discharge due to friction, and limited power due to friction. Magnetic levitation pump based on the principle of hydraulic balance

Method used

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  • Magnetic suspension pump based on hydraulic balance principle
  • Magnetic suspension pump based on hydraulic balance principle
  • Magnetic suspension pump based on hydraulic balance principle

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specific Embodiment approach 1

[0029] Specific implementation mode 1: internal drainage type water inlet compensation structure, combined with figure 1 , figure 2 , image 3 and Figure 4 Describe this embodiment;

[0030] Such as figure 1 As shown, the internal drainage type water inlet compensation structure includes a magnetic levitation motor 1 , a pump head 2 and an impeller system 3 . The pump head 2 is connected to the fixed frame 1-4 of the magnetic levitation motor 1 by bolts, and the impeller system 3 is suspended in the impeller cavity 2-4 of the pump head 2 by the interaction between the magnetic steel rotor 3-1 and the magnetic levitation motor 1 .

[0031] The magnetic levitation motor 1 includes a winding 1-1, a back iron 1-2, a magnetically permeable frame 1-3 and a fixed frame 1-4. The magnetic frame 1-3 is tightly connected to the back iron 1-2, the winding 1-1 is closely connected to the magnetic frame 1-3, and the fixed frame 1-4 is tightly connected to the magnetic frame 1-3. The...

specific Embodiment approach 2

[0036] Specific implementation mode two: the single motor form of the two-way water inlet compensation structure, combined with Figure 5 , Figure 6 , Figure 7 Explain the implementation mode.

[0037] Such as Figure 5As shown, the difference between the single motor form of the two-way water inlet compensation structure and the internal drainage type water inlet compensation structure of the specific embodiment 1 is that the pump head 2 of the single motor form is designed with an auxiliary water inlet 2-10, and does not include a water inlet. The water inlet 2-6 and the inner channel 2-7 of the pump wall, and other features are the same as the internal drainage type water inlet compensation structure described in the first embodiment.

[0038] Such as Figure 6 and 7 As shown, the inlet of the main water inlet 2-1 of the pump head 2 and the inlet of the auxiliary water inlet 2-10 are connected through the two interfaces of the three-way joint, and the third interface...

specific Embodiment approach 3

[0041] Specific implementation method three: the dual-motor form of the two-way water inlet compensation structure, combined with Figure 8 This embodiment will be described.

[0042] Such as Figure 8 As shown, the dual-motor form of the two-way water inlet compensation structure includes a forward-rotating motor 7 , an impeller system 3 , a reverse-rotating motor 5 and a pump head 2 . The forward rotation motor 7 is connected to one side of the impeller system 3 by bolts, and the reverse rotation motor 5 is connected to the other side of the impeller system 3 by bolts. The forward rotation motor 7 and the reverse rotation motor 5 are arranged symmetrically with respect to the impeller system 3 . The pump head 2 is suspended in the impeller cavity of the impeller system 3 . The forward rotation motor 7 and the reverse rotation motor 5 are substantially magnetic levitation motors. The center of the rotor cavity 3-3 of the impeller system 3 is provided with a through hole, a...

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Abstract

The invention relates to a magnetic suspension pump structure based on a hydraulic balance principle. The magnetic suspension pump structure comprises an internal drainage type water inlet compensation structure and a two-way water inlet compensation structure, and an impeller system is simultaneously subjected to pressure of liquid input by multiple inlets so as to compensate or balance axial impact, so that the problems that due to the fact that water pressure fluctuation of a water inlet of an existing magnetic suspension pump causes large axial impact on a rotor, rotation of the rotor is unstable, impulse type water outlet is carried out, friction causes impure outlet water, and power is limited are solved. The internal drainage type water inlet compensation structure is mainly characterized by an internal drainage type pump head structure; and the two-way water inlet compensation structure comprises a single-motor form and a double-motor form, and the single-motor form and the double-motor form are mainly characterized by a double-inlet pump head structure. According to the magnetic suspension pump structure, the structure is reasonably optimized, an internal drainage type or a manner that multiple inlets replace a single inlet is used for compensating or balancing axial impact in the operation process of an impeller, and the advantages of being stable in rotation, stable in water outlet, large in power, compact in structure and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of magnetic levitation pumps, in particular to a magnetic levitation pump based on the principle of hydraulic balance. Background technique [0002] The magnetic levitation pump is an electromagnetically driven fluid pump without mechanical bearings, lubricating oil, and friction of mechanical parts. The impeller rotates without friction and without mechanical wear, thus avoiding the generation of polluting particles. Due to the above characteristics, magnetic levitation pumps are widely used in medicine (artificial heart), semiconductor (pumping of ultrapure water), biotechnology (no leakage, no gap design), electroplating (seal design) and other fields. The axial suspension of the magnetic levitation pump currently designed basically adopts the thin-plate permanent magnetic passive suspension design, and the axial suspension stiffness is relatively poor; most of them are centrifugal pump heads, and the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/06F04D29/22F04D29/24F04D29/44F04D29/66
CPCF04D13/06F04D29/22F04D29/225F04D29/24F04D29/445F04D29/669
Inventor 付新张一帆陈鑫李博苏芮胡亮
Owner ZHEJIANG UNIV
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