Novel contra-rotating pump structure and working mode thereof
A working mode and a new type of technology, applied in the field of pump design, can solve the problems of large pump volume, unstable operation, and no related reports on the counterrotating structure of mixed-flow impeller and axial-flow impeller.
Active Publication Date: 2021-05-28
JIANGSU UNIV
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Problems solved by technology
Invention patent ZL01109653.5 discloses a dual-drive counter-rotating axial flow pump, which broadens the range of axial flow pumps and can partially replace mixed flow pumps. This structure uses a dual-drive design at both ends, which is not convenient for installation and use, and is easy to import Causes a large hydraulic loss; invention patent 201710190776.8 discloses a counter-rotating mixed-flow pump structure, which solves the problems of large volume, narrow high-efficiency area, unstable operation, and easy cavitation in the field of ship water jet propulsion devices
[0003] After searching, there is no relevant report using the counter-rotating structure of the mixed-flow impeller and the axial-flow impeller
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
[0027] figure 1 It is a schematic diagram of the main principles of the counter-rotating pump structure of the present invention. figure 2 with image 3 It is a partially enlarged principle schematic diagram of the counter-rotating pump structure of the present invention.
[0028] combine figure 1 , figure 2 , image 3 Describe the structural connection method of the rotary pump. The motor 17 drives the rotation of the outer shaft bevel gear 12 and the inner shaft bevel gear 13 through the upper bevel gear 15, wherein the rotation directions of the outer shaft bevel gear 12 and the inner shaft bevel gear 13 are opposite, and the shaft bevel gear 12 and the inner shaft bevel gear 13 pass through The bevel gear bracket 14 carries out radial restraint; the solid inne...
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The invention discloses a novel contra-rotating pump structure. The contra-rotating pump structure is designed, the principle is that a mixed-flow impeller and an axial-flow impeller are matched, the two impellers can be controlled through a motor, and single-impeller rotation, double-impeller contra-rotation and stepless speed change of impeller rotors are achieved; and therefore, a contra-rotating pump can achieve special centrifugal pump working conditions, mixed-flow pump working conditions, axial-flow pump working conditions and water turbine working conditions. The contra-rotating pump mainly has three working conditions of a first working condition, a second working condition and a third working condition, and under the first working condition, the mixed-flow impeller and the axial-flow impeller rotate oppositely, under the second working condition, the mixed-flow impeller rotates to do work, and the axial-flow impeller is static; and under the third working condition, the axial-flow impeller rotates to do work, and the mixed-flow impeller is static. The third working condition can realize two operation modes: a positive flow mode and a reverse flow mode.
Description
technical field [0001] The invention belongs to the design field of pumps, and is mainly used for the pump structure design of rotors. Background technique [0002] Counter-rotating pumps are water pumps equipped with counter-rotating rotors. The research on the rotator first appeared in the field of aerodynamics. At present, a large number of scholars have conducted research on the application of rotators in various fields such as aerodynamics and aeroacoustics, and have achieved fruitful results. In the field of aerodynamics, counter-rotating rotor combinations have been used in turbojet, turbofan, and propfan engines. In the field of hydrodynamics, the rotor is mainly used in propellers, water turbines, axial flow pumps and some mixed flow pumps. Since the working medium is incompressible water, its speed is relatively low, so the factors considered in its design and the concerns The emphasis is quite different from that in aerodynamics, with more emphasis on propulsio...
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IPC IPC(8): F04D13/06F04D13/12F04D29/046
CPCF04D13/06F04D13/021F04D13/12F04D29/046Y02E10/20
Inventor 卢永刚高波倪丹职晶慧李忠
Owner JIANGSU UNIV