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Cooling fan for diesel engine

A technology for cooling fans and diesel engines, which is applied to the components of pumping devices for elastic fluids, mechanical equipment, machines/engines, etc., can solve the problem of high fan noise, improve cooling components, avoid resonance, and reduce pressure shocks Effect

Active Publication Date: 2016-08-24
LUTIAN MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after adopting this kind of centrifugal cooling fan, in order to obtain the same air volume, the outer diameter of the fan impeller is significantly larger than that of the forward-curved blade cooling fan, and the arrangement of equal height blades and uniform spacing will cause some high sound pressure levels when the fan rotates. The frequency band component makes the fan noise higher

Method used

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  • Cooling fan for diesel engine
  • Cooling fan for diesel engine
  • Cooling fan for diesel engine

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment, see figure 1 —3:

[0021] A cooling fan for a diesel engine, comprising a hub 1, characterized in that: a number of blades 3 are distributed in the outer circumferential direction of the central circle 2 on the hub surface, and the gap between two adjacent blades on the front semicircle in the clockwise direction The angle 4 increases gradually, and the included angle 4 between two adjacent blades on the rear semicircle gradually decreases. The blades include an inclined root 5 , and an arc 6 is provided at the outer end of the root.

[0022] The radius of the circle where the arc portion 6 of the blade is located is 16.5-18.5 mm.

[0023] The angle between the arc portions 6 of the two adjacent blades is 13.5° to 22.5°

[0024] There are four groups of blades 3, and the blade root of each group is directed toward a circle on the same radius that i...

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Abstract

The invention provides a cooling fan for a diesel engine and belongs to the technical field of cooling fans. It solves the problems that the existing structure will generate eddy current disturbance, so the noise is large, the cooling air volume is not large, and the like. The cooling fan used in this diesel engine includes the hub. There are several blades distributed in the outer circumferential direction of the center circle on the hub surface. The included angle between two successively adjacent blades on the blade gradually decreases, and the blade includes an inclined root, and the outer end of the root is provided with an arc-shaped portion. In the above structure, the direction in which the size of the included angle gradually changes can be clockwise or counterclockwise. In the case of the same impeller diameter, the present invention increases the cooling air volume and improves the cooling capacity of the fan; at the same time, it can optimize the noise spectrum of the fan, make the noise spectrum smoother, reduce the vibration peak value of the air, avoid the resonance between the blades and the air, and reduce the generation of the cooling fan. noise.

Description

technical field [0001] The invention belongs to the technical field of cooling fans, in particular to a cooling fan for diesel engines. Background technique [0002] Due to its compact structure, high cost performance, and convenient maintenance, the single-cylinder diesel engine is favored by the agriculture, forestry, fishery and animal husbandry industries of various countries. The main supporting power for small construction machinery, small generators and agricultural and sideline processing machinery. At present, the annual production and sales volume of single-cylinder diesel engines in the world has reached 9 million units, and as time goes by, its inventory will remain at a relatively high value. The rapid increase in the use of single-cylinder diesel engines has accelerated the consumption of petroleum resources. At the same time, its exhaust emissions and noise pollution have also caused serious harm to the environment. For single-cylinder diesel engines, higher...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66F04D29/28
Inventor 罗昌国
Owner LUTIAN MASCH CO LTD
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