降低多级离心泵声波共振的泵结构
By using impeller combinations with different numbers of blades in a multi-stage centrifugal pump, the problem of acoustic resonance caused by long transition channels is solved, improving the pump's operational stability and reducing vibration. It is suitable for high-energy pumps and other pump equipment with resonance risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN DEEP BLUE PUMP CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-07-17
AI Technical Summary
The long transition channel of a multistage centrifugal pump causes sound waves to be generated when the medium flows, which leads to uneven force on the impeller and periodic excitation force. When the frequency of the sound wave is close to the natural frequency of the pump, it causes sound wave resonance, which intensifies the pump vibration.
The impeller combination with different numbers of blades is adopted, including primary impeller, secondary impeller A, secondary impeller B, back-to-back secondary impeller A and back-to-back secondary impeller B. Through hydraulic optimization design, the resonance between the blade over-frequency and the flow channel acoustic frequency is avoided, thereby improving the rotor operation stability.
It significantly reduces the vibration amplitude of multistage centrifugal pumps, reduces the impact of acoustic and hydraulic excitation on pump equipment, is suitable for high-energy pumps and other pump equipment with the risk of acoustic resonance, and does not change the external dimensions of the equipment.
Smart Images
Figure CN224515493U_ABST
Abstract
Claims
1. A pump structure for reducing acoustic resonance in a multi-stage centrifugal pump, characterized in that: The pump structure for reducing acoustic resonance in a multi-stage centrifugal pump includes: a shaft (7); The shaft (7) is sequentially equipped with a first-stage impeller (1), a second-stage impeller A (2), a second-stage impeller B (3), a last-stage impeller (6), a back-facing second-stage impeller B (5), and a back-facing second-stage impeller A (4); The secondary impeller A (2), the back-facing secondary impeller A (4), and the final impeller (6) all adopt an M-blade structure. The M mentioned is one of 5, 6, and 7; The secondary impeller B(3) and the back-facing secondary impeller B(5) adopt an N-blade structure; The N = M-1 mentioned above.