Centrifugal pump having counter-rotating substructure
A centrifugal pump and rotor technology, which is applied to the components of pumping devices for elastic fluids, pumps, pump devices, etc., can solve the problem of secondary flow, aggravation of separation flow, reduction of impeller linear speed, strength and vibration noise limit and other problems, to achieve the effect of enhancing the adaptability of variable working conditions, good vibration and noise performance, and broadening the scope of working conditions
Inactive Publication Date: 2021-03-19
JIANGSU UNIV
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Problems solved by technology
High speed is the simplest and most effective way to increase the power density of the pump, but limited by cavitation, strength, vibration and noise, the potential is limited; the multi-stage impeller design can reduce the linear velocity of the impeller, which has been applied, but the axial size of the pump increases
The limited control mode restricts the adaptability of the pump to changing working conditions. When the working condition is off, the secondary flow and separation flow in the pump will intensify, and the performance, vibration and noise will deteriorate.
The traditional pump design and adjustment methods are obviously unable to fully meet modern needs, and new design concepts and methods must be explored to break through the bottleneck of existing technologies
At present, there are no relevant patent reports on centrifugal pumps with counter-rotating substructures
Method used
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Embodiment Construction
[0010] Such as figure 1 As shown, a centrifugal pump with counter-rotating substructure according to the present invention, the structure includes a pump body 1, a volute 2, a front impeller 3, a rear impeller 4, an outer shaft 5, a rear pump cover 6, and a gland A7 , Gland B8, mechanical seal 9, deep groove ball bearing 10 and inner shaft 11. The main feature of this structure is that the front impeller 3 is fixed on the end of the inner shaft 11 close to the pump inlet, the other end of the inner shaft 12 is connected to a standard three-phase asynchronous motor, and the rear cover plate 12 of the rear impeller 4 is fixed on the outer shaft 5 close to the pump by screws. One end of the inlet and the other end of the outer shaft 5 are connected to the hollow shaft three-phase asynchronous motor. The rotation direction of the inner shaft 11 is opposite to that of the outer shaft 5, and drives the front impeller 3 and the rear impeller 4 to rotate in opposite directions. Such...
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The invention relates to a centrifugal pump with a counter-rotating substructure, and belongs to the field of fluid machinery. The rotating speed of a front impeller and the rotating speed of a rear impeller are independently adjusted through two motors so that the two impellers can rotate in the opposite rotating directions, the operating working condition range of a pump is widened, the variableworking condition adaptability is enhanced, and more adjustable parameters are provided for intelligent control. Compared with the traditional design with the same parameters, the power density can be remarkably improved by reacting the fluid through the rear impeller, the outer diameter of the impellers can be reduced through negative pre-whirl of an inlet of the rear impeller, the linear speedof the impellers is reduced, and vibration and noise reduction is facilitated.
Description
technical field [0001] The invention relates to a centrifugal pump with counter-rotor structure, which belongs to the field of fluid machinery. Background technique [0002] As a general-purpose machine, the pump plays an important role in petrochemical, energy, electric power, national defense and military fields. Its performance is highly parameterized, and its operation is specialized, extreme, and intelligent. Development in the direction of vibration and noise, multi-working condition operation, etc. High speed is the simplest and most effective way to increase the power density of the pump, but limited by cavitation, strength, vibration and noise, the potential is limited; multi-stage impeller design can reduce the linear speed of the impeller, which has been applied, but the axial size of the pump increases. The limited control methods limit the adaptability of the pump to variable working conditions. When the pump is running in an off-working condition, the secondar...
Claims
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IPC IPC(8): F04D1/00F04D13/06F04D29/66F04D29/22
CPCF04D1/003F04D13/06F04D29/669F04D29/2205
Inventor 高波顾嘉嵘张宁倪丹
Owner JIANGSU UNIV