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Fan assembly

a technology of fan assembly and fan shroud, which is applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of reducing the efficiency of cooling fans, increasing the cost and complexity of design and construction of cooling fans, and causing fan noise,

Inactive Publication Date: 2007-10-04
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large clearance between the tips of the fan blades and the fan shroud, the cooling fan efficiency is reduced.
However, the annular band connecting the tips of the fan blades increases the cost and the complexity of the design and construction of the cooling fan.
Furthermore, since the annular band includes both an axially extending wall and a radially extending wall, and both of these walls are positioned near opposing surfaces of the fan shroud, there is an increased chance that one or both of these walls may contact one or more of the opposing surfaces of the fan shroud, thereby damaging the fan shroud or the annular band and / or causing fan noise.

Method used

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Embodiment Construction

[0017] Reference will now be made in detail to exemplary embodiments, which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0018] As shown in FIG. 1, a power source, such as an engine 10, is provided. The engine 10 may be, for example, an internal combustion engine of the diesel, gasoline, or gaseous fuel-driven type, or any other type of engine. The engine 10 is positioned near a radiator 50 or other heat exchanger connected using a hose to a coolant reservoir 52. The radiator 50 receives heated coolant from the engine 10 via a first fluid passageway 54 and returns at least partially cooled coolant to the engine 10 via a second fluid passageway 56.

[0019] A fan assembly 18 includes a cooling fan 20 and a fan shroud 30. The cooling fan 20 is positioned adjacent to the radiator 50 and includes a shaft 12 that is connected to the engine 10 so that the engine 10 transfe...

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PUM

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Abstract

A fan assembly includes a fan including a plurality of fan blades, and each of the fan blades includes a tip. The fan assembly also includes a fan shroud surrounding the fan blades. The fan shroud includes a recess, and the recess includes an inner surface and at least two side surfaces. The fan assembly also includes at least one flexible member provided on at least one of the surfaces of the recess or the tips of the fan blades. At least one of a portion of the at least one flexible member or the tips of the fan blades is received in the recess.

Description

TECHNICAL FIELD [0001] The present disclosure relates generally to a fan assembly, and more particularly, to a fan assembly with flexible members. BACKGROUND [0002] Engines, including diesel engines, gasoline engines, gaseous fuel-driven engines, and other engines known in the art, continually generate heat as they operate due to the combustion of fuel. Liquid coolant is circulated through the engine to remove some of the heat from the engine and to maintain engine temperatures within a safe operating range. [0003] A radiator has a plurality of tubes configured to receive and circulate the heated coolant from the engine. A flow of ambient air is drawn through the radiator by a cooling fan so that the ambient air contacts an exterior surface of the coolant-carrying tubes of the radiator. The ambient air flows through spaces between the radiator tubes and across the radiator tubes, thereby removing some of the heat from the coolant that is flowing through the radiator tubes. The coola...

Claims

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Application Information

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IPC IPC(8): F01D11/08
CPCF04D29/164
Inventor CALLAS, JAMES J.
Owner CATERPILLAR INC