FIELD OF IWENTION
This invention relates to novel water pump to increase flow rate.
BACKGROUND/ PRIOR ART
The essential component of cooling system is water pump assembly which
includes water pump housing, cover of water pump and impeller. Water pump
forces the coolant through the engine block, hoses and radiator. to remove the
heat from the engine.
The coolant trapped'between the impeller blades is thrown outward due to the
centrifugal force. Suction (vacuum) is created in the central area of the pump
housing. Coolant is drawn from the radiator via the lower radiator hose into the
,w,ater.pump. The coolant is then circulated through the engine where it picks
up heat generated due to combustion and is sent back into the radiator where
the coolant is cooled by the external medium.
-.
Water pump is known to have been provided in the art, which is as shown in
fig. 1. The water pump comprising of.avolute (as shown in fig. 2) inside pump
housing. The pump housing is directly mounted on engine block. Further,
there is provision of an impeller between said housing and Engine block, which
is altogether mounted on a shaft.
However, the above discussed water pump develops 65 pm and 4 m of head at
2800 -rpm of water pump.
Water pump test rig\data:-
Further disadvantage is that, it does not,provide adequate cooling to the areas 1
subjected to the highest thermal stresses. Again, it is associated with pressure I losses. i Hence, the present invention proposes novel water pump to increase flow rate
which can improve' the cooling efficiency of engine with hardly any pressure
losses.
'6
OBJBCTS OF THE IWENTHOM
$,
I 'I
primary object of the present invention is to provide novel water pump to
increase flow rate which overcomes disadvantages associated with the prior art. l
Another object of the' present invention is to provide novel water pump to I
increase flow rate which increases pressure head.
e
Further object of the piesent invention is to provide novel water pump to
increase flow rate which achieves the required flow rate at lower water .pump
speeds. , ,
. . Still another object of the present invention is to provide novel water pump to
increase flow rate which minimizes power consumption.
Still another further object of the present invention is. to provide novel water .
pump to increase flow rate which ensures adequate cooling to the areas
subjected to the highest thermal stresses and minimizes pressure losses.
-
Still another oljject ofthe present invention is to provide novel water pump to i
increase flow rate which maintains constant pressure along the overall cooling 1
circuit ,
SUMMERY OF THE HIWENTION
According to this invention, there is provided novel water pump to increase flow
rate comprising of a novel volute accommodated inside pump housing mounted
on engine block and a novel impeller provided between said housing and cover
of the pump housing, which is altogether mounted on a shaft.
BMEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from
thc cnsuing description when read in conjunction with the accompanying
drawings and wherein:
Fig. 1 shows: Conventional water pump.
Fig. 2 shows: Volute according to prior art.
Fig. 3 shows: , Novel water pump in accordance with present invention. I
Fig. 4 shows: Volute of present invention.
Fig.5 shows: Impeller of present invention.
Fig. 6 A shows: velocity plot of invention.
Fig. 6E3 shows: Pressure dot of inventinn
DETAIL DIESCRI~ION OF THE PRESENT INVENTION WITH REFERENCE
TO THE ACCBMPAINYIING DRAWINGS:
The present. invention discloses a novel water pump to increase flow rate. In
this regard reference may be made to fig. 3.
The water' pump comprises of a novel volute as illustrated in fig. 4, which is
accommodated inside pump housing mounted on engine block. The volute of
the present invention is having more perimeter than the known volute.
A novel impeller as shown in fig. 5 is located between said housing and cover of
the pump housing, which is altogether mounted on a shaft.
Further blades of 'the impeller areprovided at different angle i.e. at an angle
upto 30°, whereas in the prior art the angle of blades varies between. 10-15.7'.
In conjunction with the above, the impeller has different diameter as compared
to the prior art i.e'. outer diameter of said impeller has been increased .w hich is
approximately 30% more with respect to impeller of known art.
Thus the impeller of instant invention is having a novel inlet profile by
-modification in blade angle and outer diameter.
By increasing blade angle and outer diameter, performance of the pump
improves significantly, which also leads to the following:-
- Improvement in head of the pump by approximately 50% with respect to
the prior art.
- Enhanced efficiency of the pump.
- Increase in outlet pressure.
Again, the outlet of pump is preferably rectangular in cross section thereby
increasing the flow rate.
The present invention can provide 140 LPM, 1lm of head at water pump
rpm of 2700.
-
-6-
CFD ANALYSIS OF NEW DESIGN
Reference may be made to fig. 6A and 6B.
& The water pump develops 11 m of head (WC) with 45.9 % efficiency at 2730 rpm and 140 Ipm.
Water pump test rig data:-
/ v e ~ o c i
Water pump efficiepnucmy p I1 at 1 outlet
i
i
% I
i m/s 1
45.9 f 2.5
j ---
. : Total pressure / Total pressure
- at inlet I at outlet
i
i I
Total head 1 Total head flow at
I outlet
- rmass
I
The proposed volute and impeller ensures adequate cooling of the areas
subjected to the highest thermal stresses and minimizes pressure losses.
--
Engine
Speed
1300
2000
Material of impeller is preferably .plastic to reduce frictional losses, thereby
fielping in increase of flow rate. Thus, other materials suitable for impeller
which are readily apparent to a person skilled in the art are understood to be
within scope of the invention.
kg/s
2.33
} ... " 1
Pa j i Pa Pa r ,TI
i
Pump
Speed
1800
2731
i~ 0 0 0 0 108490
3 . . . -
11.08
0.00
- -
Water Flow(LPM)
at corresponding PRESSURE KglcmZ
0.10
200
. -.
0.14
195
- - -
0.20
180
310
- -.
0.50
275
- - -
0.30
150
300
-. -
0.40
115
290
- - -
0.60
260
-- -
0.70
240
- --
0.80
225
. -"
0.90
210
- -
1.00
180
-
1.10
145
- -
1.20
100
- -- -
1.30
- - - -
Advantageous Features
- Significant improvement in the performance of the pump.
- Improvement in head of the pump by approximately 50% with respect to
the prior art.
\ - En'hanced efficiency of the pump.
- Increase in outlet pressure.
-
- Adequate cooling of the areas subjected'to the highest thermal stresses.'
- Minimizes pressure losses.
i
16 is to be noted that the present invention is susceptible to modifications, \ I adaptations and changes by those skilled in the art. Such variant embodiments I I
employing the concepts and features of this invention are intended to be within
the scope of the present invention, which is further set forth ,under the
following claims: -

1, Novel water pump to increase flow rate comprising of a novel volute ,
I
I accommodated inside pump housing mounted on engine block and a
novel impeller provided between said housing and 'cover of the pump
housing, which is altogether mounted on a shaft.
. .
2. Novel water pump to increase flow rate as claimed in claim I, wherein
the volute is having increased perimeter.
3. Novel water pump to increase flow rate as claimed in claim 1 or 2,
wherein said impeller comprises a novel inlet profile.
4. . Novel water pump to increase flow rate as claimed i n any of the
. . .
preceding claims, wherein the impeller is having a plurality of blades
at different angle for example upto 30".
5. '' Novel water pump to increase flow rate as claimed in any of the
preceding claims,, wherein the impeller is having larger outer
diameter.
6. Novel water pump to increase flow rate as claimed in. any of the
preceding claims, wherein outlet of pump is preferably rectangular in
cross section thereby increasing the flow rate.
7. Novel water pump to increase flow rate as claimed in any of the
preceding claims, is associated with the advantageous features such
as herein described. . .
8. Novel water pump to increase flow rate substantially as herein
described with reference to the accompanying drawings: