Centrifugal ventilator

A centrifugal fan and eccentric technology, applied in the direction of mechanical equipment, machine/engine, liquid fuel engine, etc., can solve the problem that the centrifugal fan cannot meet the requirements of large flow coefficient and large pressure coefficient at the same time
CN102562660BActive Publication Date: 2014-02-26TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2014-02-26

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Abstract

A centrifugal ventilator comprises a volute casing thereof and an impeller, wherein the impeller consists of a plurality of blades and is arranged in the volute casing of the centrifugal ventilator. The profile of each blade is in a two-dimensional double-arc structure, the two arcs bend to opposite directions and are connected smoothly at the position with the radius Rc ranging from 730mm to 750mm, the profile of a cap of the impeller is in double-arc transitional connection, the radiuses of the two arcs are respectively 230mm and 210mm, the outlet of the impeller has a rotary diffuser structure, and the circumferential profile of the volute casing is in smooth sectional eccentric arc connection. The flow coefficient of the centrifugal ventilator is 0.24, which is increased by 40% as compared with that of the L6-46 centrifugal ventilator and is increased by 90% as compared with that of Y5-58 centrifugal ventilator; the pressure coefficient is 1.234, which is increased by 40% as compared with that of a T4-79 centrifugal ventilator, and is increased by 11% as compared with that of the Y5-58 centrifugal ventilator; and the efficiency of the centrifugal ventilator is 86%, which is close to the highest efficiency point of a high-flow low-pressure high-efficiency ventilator, and is higher than the maximum efficiency value of a medium-flow high-pressure ventilator.
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Description

technical field

[0001] The invention relates to a ventilator. In particular, it relates to a high-flow, high-pressure and high-efficiency centrifugal fan. Background technique

[0002] A fan is a machine used to compress and transport gas. From an energy point of view, it is a machine that converts the mechanical energy of the prime mover into gas energy. The centrifugal fan is mainly composed of air inlet, impeller, volute and other main components. The centrifugal force generated by the rotation of the impeller makes the medium gain energy, and then part of the kinetic energy is converted into static pressure through the volute and the diffuser section at the exit of the volute.

[0003] At present, among the large flow fans, typical products are 4-73, 5-60, 6-50 and other series fans, and their main parameters are shown in Table 3-1:

[0004] Table 3-1 Main technical parameters of existing large flow fans

[0005]

[0006] The above data comes from "Fan Handbook", ...

Claims

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