Centrifugal fan device with adjustable blades

A centrifugal fan, adjustable technology, applied to parts, mechanical equipment, machines/engines, etc. of elastic fluid pumping devices, can solve problems such as blade impact, installation angle mismatch, etc., to reduce frictional resistance , improve the efficiency of use, and have a small effect on the scope of influence

Active Publication Date: 2017-07-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the centrifugal fan operates under variable working conditions, the inlet airflow angle of the inner impeller does not match the installation angle, causing impact on the blades

Method used

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  • Centrifugal fan device with adjustable blades
  • Centrifugal fan device with adjustable blades
  • Centrifugal fan device with adjustable blades

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with drawings and embodiments.

[0017] Such as figure 1 with 2 As shown, a centrifugal fan device with adjustable blades, one side of the inner blade 10 of the inner impeller A is fixed on the inner disc 11, and the other side is fixed with the wheel cover 1, N 1 The blades are evenly distributed along the circumference, and the number of inner blades is determined by N 1 = β 2A / 3 to estimate ( β 2A is the geometric outlet angle of the blade), N 1 Slightly larger than this value; one side of the outer blade 2 of the outer impeller B is matched with the outer disc 3 through a push-pull track, N 2 The outer blades are evenly distributed along the circumference, N 1 and N 2 Follow the principle of mutual prime numbers, and the number of outer leaves is N 2 ×The working speed of the impeller n / 60≠the natural frequency of the inner blade to avoid resonance; the inner blade 10 and the outer blade...

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PUM

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Abstract

The invention discloses a centrifugal fan device with adjustable blades. The centrifugal fan device comprises an inner impeller and an outer impeller, a plurality of the inner blades are evenly distributed in the circumferential direction of an inner wheel disc, and a plurality of the outer blades are evenly distributed in the circumferential direction of an outer wheel disc; asymmetric wing shapes are adopted for both the surface of each inner blade and the surface of each outer blade, and each surface is provided with floating protrusions used for reducing near wall friction resistance. The centrifugal fan device further comprises a signal acquisition module and a blade row spacing adjustment mechanism. The blade row spacing adjustment mechanism comprises guiding slide ways and a traction device. Through matching of the inner blades and the outer blades, the outer blades can be adjusted to appropriate positions according to air volumes under different working conditions, the effect that a centrifugal fan serves several purposes is achieved, the purpose that the centrifugal fan can still work stably and efficiently under non-rated working conditions is realized, and the cost performance and efficiency of the centrifugal fan are greatly improved; the asymmetric wing-shaped blades enable flow lines to flow basically in the direction of the blades, and airflow loss is reduced.

Description

technical field [0001] The invention belongs to the field of centrifugal fan equipment, and in particular relates to a centrifugal fan device with adjustable blades. Background technique [0002] With the development of modern science and technology, centrifugal fans, as a very common mechanical equipment in production and life, are increasingly valued by industrial production. The increase in the use of centrifugal fans also means that there will be higher requirements for fans. , in view of the current energy situation in our country combined with the current situation, energy saving and consumption reduction, the concept of one machine with multiple functions will be the development direction of fans in the future; as far as the working conditions of fans in the daily industry are concerned, there are still many unnecessary losses, which are far from meeting the needs of the economy. The improvement of the fan is imperative for this reason. [0003] Centrifugal fans gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/30F04D27/00
CPCF04D27/001F04D27/002F04D29/281F04D29/287F04D29/30
Inventor 窦华书张硕姜陈锋毛涵韬张炜梁迦贺许文倩金同舟王天垚贺磊盈董若凌赵新龙
Owner ZHEJIANG SCI-TECH UNIV
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