Dynamically balanced molded blade assemblies for blowers and fans
a technology of molded blades and fans, which is applied in the direction of liquid fuel engines, vessel construction, marine propulsion, etc., can solve the problems of vibration, noise, and wear of bearings and other parts of the motor, and the methods may require tremendous amounts of trial and error
Inactive Publication Date: 2008-12-04
CARY PRODS
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AI Technical Summary
Benefits of technology
"The patent describes molded blade assemblies used in fluid moving devices such as motors and fans. These blade assemblies have face plates with balancing means to ensure they rotate smoothly and within acceptable balance tolerances. The balancing means may include openings or protrusions formed in the face plate. The method for producing these dynamically balanced blade assemblies involves using a mold to form the blade assembly and testing it to determine its balance characteristics. The results of the test are used to adjust the mold to produce further blade assemblies with the same balancing means. Overall, this patent provides a solution for producing molded blade assemblies that are dynamically balanced and suitable for use in fluid moving devices."
Problems solved by technology
Having balanced blade assemblies may inhibit vibrations, noise, and wear on bearings and other parts of the motor.
Such methods may require tremendous amounts of trial and error and may require periodic testing of the blade assemblies to ensure that the produced blade assemblies are balanced.
Method used
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[0025]A fluid moving device may be used in a system to direct the flow of a fluid in a desired direction or directions at a desired rate. A fluid moving device may include a motor with a shaft, and a blade assembly that is coupled to the shaft of the motor. The motor rotates the shaft to rotate the blade assembly. The blade assembly moves the fluid. The fluid may be gas (e.g., air), liquid (e.g., water), a powder (e.g., flour), and / or combinations thereof. Examples of fluid moving devices that move gas are blowers and fans. Examples of fluid moving devices that move liquid and / or solids are propellers and mixers.
[0026]The blade assembly of the fluid moving device needs to be within an acceptable balance tolerance. If the blade assembly is not within the acceptable balance tolerance the fluid moving device may have too much vibration, make too much noise, and / or the life of the motor may be shortened.
[0027]Blade assemblies may be made using an injection molding process. The blade ass...
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Dynamically balanced molded blade assemblies may be formed. A face plate of a dynamically balanced molded blade assembly may have one or more openings and / or one or more protrusions so that the blade assembly is within acceptable balance tolerance when rotated by a motor shaft of a fluid moving device.
Description
BACKGROUND[0001]1. Field of the Invention[0002]The present invention relates to fluid moving devices such as blowers, fans, and propellers. More particularly, the invention relates to providing openings in face plates of molded blade assemblies of the fluid moving devices so that the blade assemblies are dynamically in balance when rotated by the motor of the fluid moving devices during use.[0003]2. Description of Related Art[0004]Fluid moving devices may be used to move fluid in a desired direction. For example, fluid moving devices may be used to move air in air conditioning system to move air from air inlets, past one or more heat exchangers, and through air vents. Fluid moving devices include blowers and fans. The blade assemblies of the fluid moving devices move the gas. The blower wheels of blowers and fan blades of fans are blade assemblies. Blade assemblies typically include a plurality of blades around a circular face plate. A shaft of a motor may be coupled to a hub of the...
Claims
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IPC IPC(8): F01D5/26
CPCF01D5/26F05D2260/34
Inventor GRIGOROW, GEORGEMERCER, JAMES D.NORBURY, JR., RAYMOND L.
Owner CARY PRODS