CN201786744U

CN201786744U - Blades of cooling fan of engine

Info

Publication number: CN201786744U
Application number: CN2010205502783U
Authority: CN
Inventors: 李存; 王晓东; 杨昆
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2011-04-06
Anticipated expiration: 2020-09-30

Abstract

The utility model provides blades of the cooling fan of the engine, which is composed of a hub and blades, and is assembled into a fan with the motor through a shaft linkage structure. Five blades are uniformly distributed onto the hub. Blades are in the torsional style, an aerofoil matched therewith is selected at the positions of designed cross-sections of blades, and aerofoils at positions of cross-sections are within the range of impact angles with relatively high efficiency, so that the flow field is optimized, the efficiency of fan is improved, and the noise of the fan is lowered. In the mean time, a forward bending structure is adopted for blades. By using proper forward bending angle, the strength of blades is improved, the flow field is optimized, and the noise is evidently reduced.

Description

A kind of fan blade of cooling fan of engine

Technical field

The utility model relates to a kind of cooling fan of engine.

Background technique

Along with the extensive use of refrigeration technique, direct injection combustion system and Electrocontrolled high-pressure spraying technique among charge inter cooling technology, the EGR, motor is strengthened day by day, and power per liter is largely increased, and the mechanical load and the heat load problem of motor highlight all the more.Along with raising, the optimization of Combustion Method of engine design and technological level be installed into exhaust silencer and make mechanical noise, combustion noise and intake and exhaust noise obtain effective control, fan noise is more outstanding.Therefore, the cooling fan of motor is had higher requirement:, require the cooling fan heat dissipation potential stronger on the one hand in order to satisfy the bigger heat dissipating capacity of cooling system; In order to reduce noise pollution, require cooling fan that low noise radiation is arranged again on the other hand.Today to strengthen at energy growing tension and environmental consciousness day, the power that people also require cooling fan to consume is also lower.

Existing fan generally adopts arc thin plate type blade or wing blades, and the advantage of arc thin plate type blade is easily manufactured, but efficient is not as wing blades.Convenience for the aerofoil profile selection, the existing selected aerofoil profile kind of wing blades all has only 3 to 5 kinds usually, though the selected aerofoil profile kind of some wing blades is many, but the difference between the different airfoil profiles is all smaller usually, and this just can not guarantee that the aerofoil profile of blade on each radius cross section is best aerofoil profile.

The number of blade of a kind of fan product of prior art is 5 and is distributed on the wheel hub that when high speed rotating was worked, because blade structure, the efficient of fan was lower, and the noise decibel value is also than higher.

Summary of the invention

The purpose of this utility model is for a kind of fan blade of cooling fan is provided, and it makes energy consumption that apparent in view decline is arranged when satisfying the cooling air quantity requirement, and the noise decibel value also has apparent in view decline simultaneously.

In order to achieve the above object, the utility model has adopted following technological scheme:

Fan blade is integral by wheel hub and vane group and becomes fan by the shaft coupling structure with motor unit, it is characterized in that: the number of blade is five and is uniformly distributed on the wheel hub; Get 10 Cross section Design from interior radial outer diameter, the established angle in 10 cross sections is followed successively by 37.17 °, 33.81 °, 30.52 °, 27.98 °, 25.71 °, 23.91 °, 22.32 °, 20.81 °, 19.54 ° and 18.75 °; The chord length of 10 sections is followed successively by 58.89mm, 61.34 mm, 64.01mm, 66.35mm, 69.33mm, 72.52mm, 76.07mm, 79.87mm, 83.96mm, 88.82mm, and the relative thickness of 10 sections is followed successively by 7.01%, 6.70%, 6.33%, 5.97%, 5.55%, 5.11%, 4.66%, 4.26%, 3.93%, 3.64%; Blade adopts forward inclined type, and has all done the rounding processing on blade inlet edge, trailing edge and top.

Cooling fan fan blade of the present utility model has the following advantages and characteristics owing to adopted technique scheme:

1, adopt twist blade, select the aerofoil profile that matches and each section aerofoil profile all be in the angle of attack scope of greater efficiency at each place, design section at blade, thereby optimized the flow field, can reduce about 30% energy consumption when guaranteeing cooling air quantity.

2, blade adopts the forward inclined type structure, by suitable antecurvature angle, the intensity of blade is increased, and the more important thing is and has optimized the flow field, makes noise that tangible reduction arranged.

Description of drawings

Fig. 1 is the basic structure schematic representation of the fan blade of the utility model cooling fan.

Fig. 2 is that the energy consumption of the utility model cooling fan and prior art fan product compares.

Concrete form of implementation

As shown in Figure 1, the fan blade of the utility model cooling fan is formed one by wheel hub 1 and blade 2, and fan blade is the integral high pressure injection-molded article, and shaft coupling structure 3 is arranged on the wheel hub 1, and motor links to each other with fan blade by shaft coupling structure 3, drives the fan blade rotation and produces air-flow.

For reducing fan noise and improving blade strength, the utility model adopts forward inclined type (top rake A), also is the torsional blade simultaneously, gets 10 cross sections from interior radial outer diameter and designs, as shown in Figure 1.

In order to make the distinguished and admirable angle of attack when crossing each radius of blade all be in efficient than in the higher scope, the utility model adopts, and is followed successively by 37.17 °, 33.81 °, 30.52 °, 27.98 °, 25.71 °, 23.91 °, 22.32 °, 20.81 °, 19.54 ° and 18.75 ° from the established angle in 10 cross sections of interior radial outer diameter.Be followed successively by 58.89mm, 61.34 mm, 64.01mm, 66.35mm, 69.33mm, 72.52mm, 76.07mm, 79.87mm, 83.96mm, 88.82mm from the chord length of 10 sections of interior radial outer diameter; The relative thickness of 10 sections is followed successively by 7.01%, 6.70%, 6.33%, 5.97%, 5.55%, 5.11%, 4.66%, 4.26%, 3.93%, 3.64%.

For the convenience of making, the rounding processing has all been done on blade inlet edge, trailing edge and top.

The major parameter of the blade in the utility model is as shown in table 1 below.Table 1

Claims

1. the fan blade of a cooling fan of engine is integral and is connected with motor by the shaft coupling structure by wheel hub and vane group; It is characterized in that: the described number of blade is five and is uniformly distributed on the wheel hub; Every blade is got 10 Cross section Design from interior radial outer diameter, and the established angle in 10 cross sections is followed successively by 37.17 °, 33.81 °, 30.52 °, 27.98 °, 25.71 °, 23.91 °, 22.32 °, 20.81 °, 19.54 ° and 18.75 °; The chord length of 10 sections is followed successively by 58.89mm, 61.34 mm, 64.01mm, 66.35mm, 69.33mm, 72.52mm, 76.07mm, 79.87mm, 83.96mm, 88.82mm, and the relative thickness of 10 sections is followed successively by 7.01%, 6.70%, 6.33%, 5.97%, 5.55%, 5.11%, 4.66%, 4.26%, 3.93%, 3.64%; Blade adopts forward inclined type, also is torsional simultaneously, and all makes rounding on leading edge, trailing edge and top and handle.