U.S. patent application number 10/792876 was filed with the patent office on 2005-09-08 for pump.
This patent application is currently assigned to Liung Feng Industrial Co., Ltd.. Invention is credited to Feng-Ming, Chuang, Heng-I, Lin, Lin, Hsu Tsang.
Application Number | 20050196300 10/792876 |
Document ID | / |
Family ID | 35667424 |
Filed Date | 2005-09-08 |
United States Patent
Application |
20050196300 |
Kind Code |
A1 |
Heng-I, Lin ; et
al. |
September 8, 2005 |
Pump
Abstract
A pump for boosting and transporting a liquid, includes a
housing, a gear rotor device, at least one cover and a motor. A
transportation chamber is defined in the housing. An inlet and an
outlet are defined in the housing and respectively in communication
with the transportation chamber. The gear rotor device is received
in the transportation chamber. The gear rotor device includes first
and second gears meshing with each other. The at least one cover
covers and seals at least one side of the housing. The motor is
mounted on one cover with a shaft thereof rotatably connecting with
one of the first and second gears. Through a full compression by
the gear rotor device, the liquid transportation is in a positive
displacement and the liquid is pressurized by the gear rotor device
whereby the pump has high head and therefore efficiently transports
the liquid.
Inventors: |
Heng-I, Lin; (Taipei Hsien,
TW) ; Feng-Ming, Chuang; (Taipei Hsien, TW) ;
Lin, Hsu Tsang; (Taipei Hsien, TW) |
Correspondence
Address: |
TROXELL LAW OFFICE PLLC
SUITE 1404
5205 LEESBURG PIKE
FALLS CHURCH
VA
22041
US
|
Assignee: |
Liung Feng Industrial Co.,
Ltd.
|
Family ID: |
35667424 |
Appl. No.: |
10/792876 |
Filed: |
March 5, 2004 |
Current U.S.
Class: |
417/410.4 ;
417/410.3 |
Current CPC
Class: |
F04C 2/14 20130101; F04C
2/086 20130101 |
Class at
Publication: |
417/410.4 ;
417/410.3 |
International
Class: |
F04B 017/00; F04B
035/04 |
Claims
1. A pump for boosting and transporting a liquid, comprising: a
housing, transportation chamber being defined in the housing, an
inlet and an outlet being defined in the housing and respectively
in communication with the transportation chamber; a gear rotor
device received in the transportation chamber, the gear rotor
device comprising first and second gears meshing with each other;
at least one cover covering and sealing at least one side of the
housing; and a motor mounted on one cover with a shaft thereof
rotatably connecting with one of the first and second gears;
Wherein through a full compression by the gear rotor device, the
liquid transportation is in positive displacement and the liquid is
pressurized by the gear rotor device whereby the pump has high head
and therefore efficiently transports the liquid.
2. The pump as claimed in claim 1, wherein the meshing first and
second gears are spur gears or helical gears.
3. The pump as claimed in claim 1, wherein the transportation
chamber has two cavities with same diameters.
4. The pump as claimed in claim 3, wherein the inlet is connected
with a side wall of the transportation chamber which is formed
along a beeline between two points of tangencies of the largest
meshing rotor circles of the first and second gears, whereby the
liquid is drawn smoothly during the meshing rotation of the first
and second gears for preventing from incompletely suction thereby
preventing cavitation.
5. The pump as claimed in claim 1, wherein the transportation
chamber has two cavities with different diameters and in
communication with each other, that's, diameters of pitch circles
of the meshing gears are different, the gear rotatably connecting
with the motor has a relatively large diameter and a relatively
great amount of gear teeth and drives the other gear as a gearwheel
drives a pinion thereby increasing a transportation rate of the
liquid and a rotation speed of the other gear.
6. The pump as claimed in claim 5, wherein the inlet and the outlet
are mounted with different arrangements by axis and longitude on
the transportation chamber.
7. The pump as claimed in claim 6, wherein a nozzle is further
connected with the outlet for providing a spraying function.
8. The pump as claimed in claim 7, wherein the transportation
chamber is defined through the housing, first and second covers
respectively cover upper and lower sides of the housing thereby
sealing the transportation chamber and positioning the first and
second gears within the transportation chamber.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a pump, particularly to a
pump which has high head, is not limited to be mounted beneath a
liquid surface for starting, is applied for drain of condensed
water of an air-cooler, spray for heat dissipation of a condenser,
spouting of a windshield wiper of a car, headlight cleanout, spray
of gardening watering and so on, and achieves a positive
transportation result.
[0003] 2. Prior Art
[0004] In general, many implements are equipped with pumps for
aiding to transport a liquid to a predetermined place. For example,
when condensed water of an air-cooler cannot be drained due to the
mounted position limitation of the outlet for the condensed water,
a pump is installed additionally as a relay station to draw the
condensed water to a predetermined place. As another example, a
liquid for a windshield wiper of a car is drawn to a windshield of
the car by a pump too. As another example, a pump is used in spray
and irrigation for gardening flowers and grass. As described above,
pumps are widely applied.
[0005] However, the conventional pump is centrifugal type with low
head. Furthermore, a net positive suction head (NPSH) problem has
to be considered when the pump is installed. That's, the inlet of
the conventional centrifugal pump must locate below a liquid
surface in a proper depth. Otherwise, cavitation will occur, which
results that the function of transporting is adversely affected or
even lapsed. Thus, it is inconvenient to install the conventional
pump.
SUMMARY OF THE INVENTION
[0006] Accordingly, an object of the present invention is to
provide a pump, which has high head and is convenient to be
installed with an inlet thereof being above or beneath a liquid
surface.
[0007] Further object of the present invention is to provide a pump
preventing cavitation from a high-speed rotation.
[0008] Further object of the present invention is to provide a
pump, which is applied to an air-cooler with a nozzle for spraying
the condenser of the air-cooler thereby, increasing heat transfer
efficiency.
[0009] To achieve the above-mentioned objects, a pump of the
present invention characterizes in that a gear rotor device
received in a transportation chamber. The gear rotor device
includes first and second gears meshing with each other. Through a
full compression by the gear rotor device, the liquid
transportation is in positive displacement and the liquid is
pressurized by the gear rotor device whereby the pump has high head
and therefore efficiently transports the liquid.
[0010] Wherein the meshing first and second gears are spur gears or
helical gears.
[0011] According to one aspect of the present invention, the
transportation chamber has two cavities with different diameters
and in communication with each other, that's, diameters of pitch
circles of the meshing first and second gears are different,
thereby increasing a transportation rate of the liquid and a
rotation speed of the other gear.
[0012] According to another aspect of the present invention, the
transportation chamber has two cavities with same diameters.
[0013] Wherein an inlet is connected with a side wall of the
transportation chamber which is formed along a beeline between two
points of tangencies of the largest meshing rotor circles of the
first and second gears, whereby the liquid is drawn smoothly during
the meshing rotation of the first and second gears for preventing
from incompletely suction thereby preventing cavitation.
[0014] According to another aspect of the present invention, the
inlet and the outlet are mounted with different arrangements by
axis and longitude on the transportation chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a perspective view of a pump of the present
invention;
[0016] FIG. 2 is a crosssectional view of a transportation chamber
of the present invention;
[0017] FIG. 3 is a crosssectional view along line 3-3 in FIG.
1;
[0018] FIG. 4 is a perspective view showing the pump being applied
to a window type air-cooler;
[0019] FIGS. 5 and 6 are schematic views showing the pump being
applied to a separation type air-cooler;
[0020] FIG. 7 is a schematic view showing a pump in accordance with
the second embodiment of the present invention;
[0021] FIG. 8 is a schematic view showing a pump in accordance with
the third embodiment of the present invention; and
[0022] FIGS. 9A-9D are schematic views showing different
arrangements of an inlet and an outlet.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0023] Referring to FIGS. 1-3, a pump 1 of the present invention
includes a housing 2, a gear rotor device 3, first and second
covers 40, 41 and a motor 5. A transportation chamber 20 is defined
through the housing 2 for receiving the gear rotor device 3. In
this embodiment, the transportation chamber 20 has two cavities
with different diameters and in communication with each other.
That's, diameters of pitch circles of meshing gears of the gear
rotor device 3 are different. Therefore, a transportation rate of
liquid is increased and a rotate speed of the gear rotor device 3
is increased too. Referring to FIG. 3, the gear rotor device 3
includes a first gear 30 and a second gear 31. The meshing first
and second gears 30, 31 are spur gears or heelical gears. The first
gear 30 rotatably connects with the motor 5 and has a relatively
large diameter and a relatively great amount of gear teeth 301. The
first gear 30 drives the second gear 31 as a gearwheel drives a
pinion. So the rotate speed of the gear rotor device 3 in the
transportation chamber 20 is increased and the transportation rate
of liquid is increased too. An inlet 201 and an outlet 202 are
defined in the housing 2 and respectively in communication with the
transportation chamber 20. In this embodiment, the inlet 201 and
the outlet 202 are configured in a line and at opposite sides of
the transportation chamber 20.
[0024] The first and second covers 40, 41 respectively cover upper
and lower sides of the housing 2 thereby sealing the transportation
chamber 20 and positioning the first and second gears 30, 31 within
the transportation chamber 20. The motor 5 is mounted on the first
cover 40 with a shaft (not shown) thereof rotatably connecting with
the first gear 30. When the motor 5 is actuated, the motor 5 drives
the first gear 30 to rotate and then drives the second gear 31 to
rotate. Therefore, when the first and second gears 30, 31 mesh with
each other to rotate in reverse directions, the liquid will be
drawn from the inlet 201 to the transportation chamber 20 through
the suction zone 21 defined between the first and second gears 30,
31, and then compressed by the meshing first and second gears 30,
31, and then expelled from the outlet 202 along the rotation
directions of the first and second gears 30, 31. Since the first
gear 30 meshes with the second gear 31 and drives the second gear
31 to rotate, the rotation is smooth and so the transportation is
in a positive volume manner. Thus, a full compression is achieved
in the pump 1 and so the pump 1 has high head and cavitation does
not occur. Therefore, it is unnecessary to consider the NPSH
problem and so it is easy to install the pump 1.
[0025] Referring to FIG. 4, the pump 1 of the present invention is
applied to a window type air-cooler 7. The pump 1 (as shown in
broken line) is mounted between an evaporator 70 and a condensator
71 of the window type air-cooler 7. When the motor 5 of the pump 1
is actuated, a condensed liquid of the evaporator 70 is drawn from
the inlet 201 to the transportation chamber 20 through a tube 23
connected between the inlet 201 and the transportation chamber 20.
Another tube 23 is connected with the outlet 202 with a nozzle 24
connected with the other end thereof for spraying the condensator
71, thereby increasing efficiency of heat dissipation of the window
type air-cooler 7.
[0026] Referring to FIGS. 5 and 6, the pump 1 is applied to a
separation type air-cooler 6. The pump 1 is mounted at a side of
the air-cooler 6 away from a control PCB assembly 60 (see FIG. 5),
or is mounted at a side of the air-cooler 6 close the control PCB
assembly 60 (see FIG. 6). Therefore, when the motor 5 of the pump 1
is actuated, a condensed liquid of an evaporator (not shown) of the
air-cooler 6 is drawn from the inlet 201 to the transportation
chamber 20 and then expelled from the outlet 202 to a predetermined
place through a tube 23 connected with the outlet 202. Thus, since
the pump 1 has high head, the pump 1 is capable to be directly
installed in the interior of the separation type air-cooler 6. So,
it is convenient to install the pump 1 and the separation type
air-cooler 6.
[0027] The pump 1 of the present invention is capable to smoothly
transport the liquid under a high rotation speed, since the
transportation is positive displacement. Furthermore, the pump 1
has high head and cavitation does not occur under the high rotation
speed. Therefore, besides the air-cooler, the pump 1 may be applied
to other implements needing to pressurizingly transport the liquid,
such as spouting of a rain brush of a car, headlight cleanout,
spray of gardening watering and so on.
[0028] FIGS. 7 and 8 show pumps 1' in accordance with the second
and third embodiments of the present invention. A transportation
chamber 20' is defined in each pump 1' and has two cavities with
same diameters, which is different from the first embodiment. So,
diameters of pitch circles of meshing first and second gears 30',
31' are the same. As shown in FIG. 7, an inlet 201' is connected
with a side wall of the transportation chamber 20' which is formed
along a beeline between two points P, Q of tangencies of the
largest meshing rotor circles of the first and second gears 30',
31'. Thus, the liquid is drawn smoothly during the meshing rotation
of the first and second gears 30', 31'. The rotation path to draw
liquid is increased for preventing from incompletely drawing the
liquid thereby preventing the cavitation. Furthermore, it is
prevented from incompletely suction during the high-speed
transportation, thereby preventing the cavitation.
[0029] Referring to FIGS. 9A-9D, the pump 1" has an inlet 201" and
an outlet 202" which are formed with different arrangements by axis
and longitude on the transportation chamber. The pump 1" can also
achieve the objects of the present invention since it has the
above-mentioned advantages of the present invention.
[0030] It is understood that the invention may be embodied in other
forms without departing from the spirit thereof. Thus, the present
examples and embodiments are to be considered in all respects as
illustrative and not restrictive, and the invention is not to be
limited to the details given herein.
* * * * *