Fire pump with improved flow channel

By designing multi-layer guide plates and optimizing the impeller flow channel in the fire pump, the problems of large flow loss and low cavitation resistance were solved, and the flow velocity and flow rate were improved, thereby enhancing the hydraulic performance and efficiency of the fire pump.

CN119288907AActive Publication Date: 2025-01-10LEO GRP ZHEJIANG PUMP CO LTD
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Patent Information

Application Number
CN202411576169.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-01-10
Estimated Expiration
2044-11-06

AI Technical Summary

Technical Problem

Existing fire pumps suffer from problems such as large flow losses in the flow channel and low cavitation resistance, and their hydraulic performance needs to be improved.

Method used

An improved flow channel fire pump was designed, which adopts a multi-layer guide plate structure, including a first guide plate, a second guide plate and a third guide plate. Through specific angle and inclined surface design, combined with radial projection length and wave-shaped structure, the flow guiding effect of the impeller flow channel is optimized.

Benefits of technology

It reduces flow losses in the impeller channel, increases output velocity and flow rate, and enhances the fire pump's anti-cavitation performance, thereby improving hydraulic performance and efficiency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN119288907A_ABST
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Abstract

The fire pump comprises a volute, an impeller and a motor, the impeller is rotatably installed in the volute and comprises a front cover plate (1), a rear cover plate (2) and blades (3), and a flow guide disc is arranged between the front cover plate and the rear cover plate; the flow guide disc is characterized by comprising a first flow guide disc body (4), a second flow guide disc body (5) and a third flow guide disc body (6), an included angle + a is formed between the chord line of the arc-shaped plate-shaped structure of the first flow guide disc body and the reference plane, an included angle + b is formed between the second plate-shaped structure of the second flow guide disc body and the reference plane, and an included angle-c is formed between the third plate-shaped structure of the third flow guide disc body and the reference plane; the reference plane is perpendicular to the rotation axis of the impeller, the included angle a is not equal to b and c, and b is larger than a and larger than c. Through the design of the impeller flow passage, the flow loss in the impeller flow passage can be reduced, and the anti-cavitation performance of the fire pump is improved, so that the hydraulic performance and efficiency of the fire pump can be improved.
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Citation Information

Patent Citations

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    CN115929686A

  • Anti-cavitation high-performance automobile water pump

    CN116104768A

  • Hydraulic pump

    CN117989173A

  • Impeller structure of fire pump

    CN118462640A

  • High-efficiency multi-stage pump

    CN118481995A