Title of Invention

AN AIR FAN IMPELLER FOR A CENTRIFUGAL PNEUMOFIL BLOWER

Abstract This invention relates to an air impeller for a centrifugal pneumofil blower used in textile ring frames for initiating vacuum in the longitudinal axis of the tunnel.It is therefore an object of this invention to propose an air fan impeller which results in the consumption of less energy and, consequently,less power cost.Another object of this invention is to ensure that while fulfilling the above mentioned objective,the same suction pressure is maintained in the pneumatic tunnel. In other words,this invention enables less load to be taken up at the sdrivermotor, and consequently, less power charges,without compromising on suction pressure at the input end.
Full Text

This inventiun relates to an air fan impeller for a centrifugal prefix blower used in textile ring frames for initiating vacuum in the longitudinal axis of the tunnel.
The pneumonia blower consists of three major components, namely, the air fan impeller, the volute-casing chamber and a motor to drive the air fan impeller.
The air fan impeller consists mainly of the hub and hub cone, the air inflow shroud, a plurality of impeller vanes and back shroud.
In the use of the air fan impellers known to the art, the load on the drive motor is high, leading to higher energy intake and more power cost.
It is therefore an object of this invention to propose an air fan impeller which results in the consumption of less energy and, consequently, less power cost.
Another object of this invention is to ensure that while fulfilling the above mentioned objective, the same suction pressure is maintained in the pneumatic tunnel.

in other words, this invention enables less load to be taken up at the drive motor, and, consequently, less power charges, without compromising on suction pressure at the input end.
The saving in power costs can be appreciated from the fact that pneumonia blowers and their drive motors operate continuously all 24 hours a day, and throughout the year.
We have ascertained that by defining the parameters of the components of the air fan impeller, the objects of this invention are achieved.
As already stated above the air fan a motor drives impeller proposed herein. While a motor known to the art can be selected to drive the proposed air fan impeller, we have invented a new induction motor by precisely defining the parameters of the components of which greater efficiency in operation is achieved. Thus, this motor is not only well suited to drive the proposed air fan impeller, but is equally well suited to drive any other equipment as well A separate application for such induction motor is being taken out.
The air fan impeller for a centrifugal pneumofil blower, according to this invention, comprises an air inflow shroud, a back shroud, a plurality of equally spaced impeller vanes

ab'sembied together around a hub and hub cone, characterised in that the ab inflow shroud and back shroud each has a diameter 482 to 484 mm, the au- inflow shroud being made of mild steel plate of thickness 2 to 2.5 mm. and the back shroud being made of mild steel plate of thickness 3.8 to 4.5 mm; and each impeller vane has a dram ever 472 to 475 mm and width 48 to 52 mm.
This invention will now be described with reference to the
accompanying drawings which illustrate, by way of example,
and not by way of limitation, one of possible embodiments of
the air fan impeller proposed herein
Fig.l illustrating the embodiment in perspective
Fig2. illustrating an exploded view of the said embodiment.
The air fan impeller has an inflow shroud 3, a back shroud 5, a plurality of equally spaced impeller vanes 4 all assembled together around a hub 1 and hub cone 2.
The characteristic features of this invention are that the air inflow shroud and back shroud each has a diameter 482 to 484 mm; and each impeller vane has a diameter 472 to 475 mm with width of 48 to 52 mm. The further characteristic features

of this invention are that the air inflow shroud is made of mild steel plate of thickness 2 to 2.5 mm and the back shroud is made of mild steel plate of thickness 3.8 to 4.5 mm
The terms and expressions in this specification are of description and not of limitation, inasmuch as various other embodiments of the air fan impeller proposed herein are possible without departing from the scope and ambit of this invention.




We Claim:
1. An air fan impeller for a centrifugal pneumofil blower
comprising an air inflow shroud, a back shroud, a plurality
of equally spaced impeller vanes assembled together around
a hub and hub cone, characterised in that the air inflow
shroud and back shroud each has a diameter 482 to 484 mm,
the air inflow shroud being made of mild steel plate of
thickness 2 to 2.S mm. and the back shroud being made of
mild steel plate of thickness 3.8 to 4.5 mm; each impeller
vane has a diameter 472 to 475 mm and width 48 to 52 mm.
2. An air fan impeller for a centrifugal pneumofil blower
substantially as herein described with reference to and as
illustrated in the accompanying drawings.


Documents:

635-che-2003-claims filed.pdf

635-che-2003-claims granted.pdf

635-che-2003-correspondnece-others.pdf

635-che-2003-correspondnece-po.pdf

635-che-2003-description(complete)filed.pdf

635-che-2003-description(complete)granted.pdf

635-che-2003-drawings.pdf

635-che-2003-form 1.pdf

635-che-2003-form 19.pdf

635-che-2003-form 26.pdf


Patent Number 211916
Indian Patent Application Number 635/CHE/2003
PG Journal Number 02/2008
Publication Date 11-Jan-2008
Grant Date 13-Nov-2007
Date of Filing 04-Aug-2003
Name of Patentee LAKSHMI ELECTRICAL DRIVES LIMITED
Applicant Address 504 AVANASHI ROAD, PEELAMEDU, COIMBATORE 641 004,
Inventors:
# Inventor's Name Inventor's Address
1 V. MURUGANANDHAM LAKSHMI ELECTRICAL DRIVES LIMITED, 504 AVANASHI ROAD, PEELAMEDU, COIMBATORE 641 004,
PCT International Classification Number F23L 9/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA