Frequency-conversion high-speed permanent magnet shield pump
A shielded pump, permanent magnet technology, applied in non-variable-capacity pumps, pumps, pump devices, etc., can solve the problem that the permanent magnet synchronous motor with variable frequency speed regulation cannot achieve absolutely no leakage, and cannot be used to transport precious liquids with chemicals, etc. The problem of high-speed operation of the permanent magnet canned pump cannot be realized, and the effect of improving the efficiency of the unit, good maintainability and light weight can be achieved.
Inactive Publication Date: 2010-05-05
JIANGSU UNIV
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Benefits of technology
This patented technology reduces losses caused during rotation due to electrical resistance between different parts inside an electric machine that are connected through conductivity paths or insulation layers. It achieves this by adjusting the distance between certain components within each part without affecting their functioning properly. By making these distances smaller, less inductance occurs while still allowing enough space around them, resulting in higher efficiencies compared to traditional methods like wound field synchronous machines (WFSM). Additionally, it allows for more flexibility when selecting which type of material they should carry out work on depending upon factors such as load level, operating conditions, environmental temperature, etc., reducing the risk associated with materials handling operations. Overall, this innovation helps optimize the performance and lifespan of electric machinery.
Problems solved by technology
This patented technical problem addressed by this patents relates to improving the performance and durability of conventional electrical or magnetically driven pumps due to their poor energy consumption caused by slippages between the sheaths covering them. Current methods involve adding expensive materials such as rare earth metals that improve wear life without sacrificing work quality.
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[0012] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0013] Frequency conversion high-speed permanent magnet shielded pump consists of pump body 1, impeller 2, rear end cover 3, leading bearing 4, permanent magnet rotor 5, stator 6, frequency converter 7, junction box 8, rear guide bearing 9, and rear cover plate 10 , circulation pipe 11. It is characterized in that a rotor shielding sleeve 15 is installed on the outer ring of the permanent magnet rotor 5; a stator shielding sleeve 14 is installed on the outer ring of the stator 6. The shielding sleeve is made of non-magnetic materials with high strength, corrosion resistance, high resistivity, good thermal conductivity, and excellent welding performance, such as Inconel alloy, Hastelloy alloy, Monel Alloy, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti or industrial titanium etc. A permanent magnet 18 is built in the rotor core 17, and the permanent magnet adopts
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The invention relates to a frequency-conversion high-speed permanent magnet shield pump integrating a frequency converter, a permanent magnet shield electric machine and a pump and puts forward that a frequency-conversion technology is applied to a permanent magnet shield pump for the first time so as to realize high-speed running of the permanent magnet shield pump and realize that the frequency-conversion high-speed permanent magnet shield pump has wider speed adjustable range. For constant-power speed regulation load, the voltage U remains unchanged, and the frequency f is changed on the basis of fundamental frequency; stator and rotor slot shapes, a winding type and the like are regulated so as to enable the stator and rotor slot shapes, the winding type and the like to adapt to a condition of frequency-conversion power supply. The frequency-conversion permanent magnet shield pump not only can ensure the big-load capability at high speed, but also can keep high-torque output at low frequency. The invention employs the design that a permanent magnet rotor magnetic path is arranged in the permanent magnet shield electric machine and has the most obvious characteristic that the inner surface of a stator and the outer surface of a rotor are respectively provided with a layer of shield cover protection. The asynchronous starting and the synchronous working of the frequency-conversion permanent magnet shield pump are realized; the pump can run at high speed with convertible frequency and no leakage.
Description
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