U.S. patent application number 10/892178 was filed with the patent office on 2006-01-19 for hydraulic pump.
Invention is credited to Tsu-Hsiang Liao, Chong-Liang Lin.
Application Number | 20060013699 10/892178 |
Document ID | / |
Family ID | 35599621 |
Filed Date | 2006-01-19 |
United States Patent
Application |
20060013699 |
Kind Code |
A1 |
Lin; Chong-Liang ; et
al. |
January 19, 2006 |
Hydraulic pump
Abstract
A hydraulic pump for delivering water from a low level water
supply zone to a high level water supply zone includes a power
equipment to drive and rotate a slant board which drives a piston
moving reciprocally in a housing chamber of a cylinder. The housing
chamber has a suction port and a discharge port. The reciprocal
movement of the piston in the housing chamber generates a pressure
difference to deliver the water from the low level water supply
zone to the high level water supply zone.
Inventors: |
Lin; Chong-Liang;
(Taichung-City, TW) ; Liao; Tsu-Hsiang; (Taichung
City, TW) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Family ID: |
35599621 |
Appl. No.: |
10/892178 |
Filed: |
July 16, 2004 |
Current U.S.
Class: |
417/269 ;
417/338 |
Current CPC
Class: |
F04B 1/14 20130101 |
Class at
Publication: |
417/269 ;
417/338 |
International
Class: |
F04B 1/12 20060101
F04B001/12; F04B 17/00 20060101 F04B017/00; F04B 27/08 20060101
F04B027/08; F04B 35/00 20060101 F04B035/00 |
Claims
1. A hydraulic pump for delivering water from a low level water
supply zone to a high level water supply zone, comprising: a power
equipment having a power output shaft which has an axis as the
rotation center of the power output shaft; a slant board coupled on
the power output shaft to be driven by the power equipment to
rotate having a rotation center, the normal line of the slant board
forming an angle with the axis of the power output shaft; and a
water delivery mechanism having a cylinder, a piston and a
returning spring, the cylinder having a cylindrical housing chamber
which has an opening and a suction port and a discharge port remote
from the opening, the suction port being connected and communicated
with the low level water supply zone, the discharge port being
connected and communicated with the high level water supply zone,
the suction port and the discharge port having respectively an one
way valve, the piston having an outer diameter formed according to
the inner diameter of the housing chamber and being placed in the
housing chamber through the opening, the returning spring being
located between the piston and the cylinder, the piston having an
exposed top end in contact with the slant board outside the
rotation center such that rotation of the slant board drives and
pushes the piston and the returning spring to move the piston
reciprocally in the housing chamber to allow the water delivery
mechanism to deliver the water from the low level water supply zone
to the high level water supply zone.
2. The hydraulic pump of claim 1, wherein the surface of the
housing chamber is coated with a material of a low friction
coefficient.
3. The hydraulic pump of claim 2, wherein the material of a low
friction coefficient is poly-terafluoroethylene (PTFE).
4. The hydraulic pump of claim 1, wherein the one way valve
includes a blocking member coupling with an elastic element to
close the suction port and the discharge port.
5. The hydraulic pump of claim 1 further having a bracket for
holding multiple sets of the water delivery mechanism.
6. The hydraulic pump of claim 1, wherein multiple sets of the
water delivery mechanism are formed in a strut.
7. The hydraulic pump of claim 1, wherein the slant board is
pivotally coupled on the power output shaft which has an anchor
board fixedly mounted thereon, the anchor board having an
adjustment bolt screwed thereon, the slant board and the adjustment
bolt being pivotally coupled to two ends of an adjustment rod such
that the angle between the normal line and the axis is changeable
by adjusting the adjustment bolt.
8. The hydraulic pump of claim 7, wherein multiple sets of the
adjustment bolt are evenly and symmetrically located on the anchor
board about the power output shaft.
9. The hydraulic pump of claim 1, wherein the piston has an
O-ring.
10. The hydraulic pump of claim 1, wherein the exposed top end of
the piston is semi-spherical.
11. A hydraulic pump for delivering water from a low level water
supply zone to a high level water supply zone, comprising: a power
equipment having a power output shaft which has an axis as the
rotation center of the power output shaft; a slant board coupled on
the power output shaft to be driven by the power equipment to
rotate having a rotation center, the normal line of the slant board
forming an angle with the axis of the power output shaft, the slant
board having a circular track adhered to the surface thereof that
is coaxial with the rotation center, the circular track being
coupled with a guiding member; and a water delivery mechanism
having a cylinder and a piston, the cylinder having a cylindrical
housing chamber which has an opening and a suction port and a
discharge port remote from the opening, the suction port being
connected and communicated with the low level water supply zone,
the discharge port being connected and communicated with the high
level water supply zone, the suction port and the discharge port
having respectively an one way valve, the piston having an outer
diameter formed according to the inner diameter of the housing
chamber and being placed in the housing chamber through the
opening, the piston being connected to the guiding member such that
rotation of the slant board drives and pushes the piston moving
reciprocally in the housing chamber to allow the water delivery
mechanism to deliver the water from the low level water supply zone
to the high level water supply zone.
12. The hydraulic pump of claim 11, wherein the circular track is
replaced by a circular trough which is formed on the slant board,
the guiding member being wedged in the circular trough and
connected to the piston.
13. The hydraulic pump of claim 11, wherein the surface of the
housing chamber is coated with a material of a low friction
coefficient.
14. The hydraulic pump of claim 13, wherein the material of a low
friction coefficient is poly-terafluoroethylene (PTFE).
15. The hydraulic pump of claim 11, wherein the one way valve
includes a blocking member coupling with an elastic element to
close the suction port and the discharge port.
16. The hydraulic pump of claim 11 further having a bracket for
holding multiple sets of the water delivery mechanism.
17. The hydraulic pump of claim 11, wherein multiple sets of the
water delivery mechanism are formed in a strut.
18. The hydraulic pump of claim 11, wherein the guiding member and
the piston are bridged by a universal joint, the slant board being
pivotally coupled on the power output shaft which has an anchor
board fixedly mounted thereon, the anchor board having an
adjustment bolt screwed thereon, the slant board and the adjustment
bolt being pivotally coupled to two ends of an adjustment rod such
that the angle between the normal line and the axis is changeable
by adjusting the adjustment bolt.
19. The hydraulic pump of claim 18, wherein multiple sets of the
adjustment bolt are evenly and symmetrically located on the anchor
board about the power output shaft.
20. The hydraulic pump of claim 11, wherein the piston has an
O-ring.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a pump and particularly to
a high efficiency hydraulic pump.
BACKGROUND OF THE INVENTION
[0002] A conventional pump, as shown in FIGS. 1 and 2, generally
has a power equipment 1 such as a motor to drive and rotate an
arched vane 2 to draw water from a lower level water supply zone
through a water inlet 3. The water is driven by the arched vane 2
and delivered to a high level water supply zone through a water
outlet 4.
[0003] However the driving effect resulting from the rotating
arched vane 2 is limited. The water pumping height between the low
level water supply zone and the high level water supply zone
achievable by the rotating arched vanes 2 has a limitation.
Moreover, when the arched vane 2 rotates, a great friction occurs
between the vane and the water that causes unnecessary energy loss.
This also reduces pump efficiency.
SUMMARY OF THE INVENTION
[0004] In view of the aforesaid disadvantages, the primary object
of present invention is to provide a high efficiency hydraulic pump
to reduce energy loss.
[0005] The hydraulic pump according to the invention aims to
deliver water from a low level water supply zone to a high level
water supply zone. It includes a power equipment, a slant board and
a water delivery mechanism. The power equipment has a power output
shaft which has an axis as the rotation center of the power output
shaft. The slant board is coupled on the power output shaft and
driven by the power equipment to rotate. The slant board also has a
rotation center from which a normal line may be drawn to form an
angle difference with the axis of the output shaft. The water
delivery mechanism includes a cylinder and a piston. The cylinder
has a cylindrical housing chamber which has an opening, and a
suction port and a discharge port that include respectively an one
way valve to connect and communicate respectively with the low
level water supply zone and the high level water supply zone. The
piston is housed in the housing chamber. The slant board may be
rotated to push the piston and a returning spring so that the
piston is moved reciprocally in the housing chamber.
[0006] The foregoing, as well as additional objects, features and
advantages of the invention will be more readily apparent from the
following detailed description, which proceeds with reference to
the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a schematic view of a conventional pump.
[0008] FIG. 2 is a schematic view of a conventional arched
vane.
[0009] FIG. 3A is a schematic view of the present invention.
[0010] FIG. 3B a schematic view of the present invention in an
operating condition according to FIG. 3A.
[0011] FIG. 4A is a schematic view of the water delivery mechanism
in an operating condition.
[0012] FIG. 4B is a schematic view of the water delivery mechanism
in another operating condition.
[0013] FIG. 5A is a schematic view of a first embodiment of the
present invention.
[0014] FIG. 5B is a side view according to FIG. 5A.
[0015] FIG. 6 is a schematic view of a second embodiment of the
present invention.
[0016] FIG. 7A is a schematic view of a third embodiment of the
present invention.
[0017] FIG. 7B is a schematic view of the slant board in an
adjustment operation according to FIG. 7A.
[0018] FIG. 8 is a schematic view of a fourth embodiment of the
present invention.
[0019] FIG. 9 is a schematic view of a fifth embodiment of the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0020] Please referring to FIGS. 3A and 3B, the power equipment
(not shown in the drawings) according to the invention includes a
power output shaft 10 which has an axis 11 serving as the rotation
center of the power output shaft 10. The most commonly used power
equipment is the motor. However, other equipment that can provide
rotational power such as wind mills, water mills and the like may
also be used.
[0021] A slant board 20 is provided to couple with the power output
shaft 10 and be driven by the power equipment to rotate. The slant
board 20 also has a rotation center 201 from which a normal line
may be drawn to form an angle .theta. with the axis 11. A water
delivery mechanism 30 is provided that includes a cylinder 40, a
piston 50 and a returning spring 45. The cylinder 40 has a
cylindrical housing chamber 401 which has an opening 402, and a
suction port 60 and a discharge port 70 remote from the opening 402
that connect and communicate respectively with a low level water
supply zone and a high level water supply zone. The suction port 60
and the discharge port 70 have respectively an one way valve 75
which has a blocking member 752 coupled with an elastic element 751
to close the suction port 60 and the discharge port 70 so that
water flows in only through the suction port 60 and flows out
through the discharge port 70.
[0022] The piston 50 has an outer diameter formed according to the
inner diameter of the housing chamber 401. It is placed in the
housing chamber 401 through the opening 402. The piston 50 has an
O-ring 51 to enhance air tightness. The returning spring 45 is
located between the piston 50 and the cylinder 40. The piston 50
has a top end 52 exposed to be in contact with the outer area of
the slant board 20 outside the rotation center 201. The top end 52
is semi-spherical so that the slant board 20 can push the piston 50
more smoothly during rotation. Through the rotation of the slant
board 20, the piston 50 and the returning spring 45 are pushed and
returned so that the piston 50 is moved reciprocally in the housing
chamber 401. To reduce friction, the surface of the housing chamber
401 may be coated with a layer of poly-terafluoroethylene (PTFE) or
the like that has a low friction coefficient.
[0023] Referring to FIGS. 4A and 4B, when the piston 50 is moved
reciprocally in the housing chamber 401, the movement can be
divided in two stages. The first stage is water suction, and the
piston 50 is moved outwards from the cylinder 40 to expand the
volume of the housing chamber 401. Due to pressure difference,
water in the low level water supply zone is sucked into the housing
chamber 401 through the suction port 60. The second stage is water
discharge, and the housing chamber 401 is filled with water, and
the piston 50 is moved inwards of the cylinder 40 to compress the
water and discharge the water through the discharge port 70 to the
high level water supply zone. By means of the continuously
reciprocal movements of the piston 50 in the cylinder 40, water may
be delivered from the low level water supply zone to the high level
water supply zone.
[0024] Referring to FIGS. 5A and 5B, in order to improve hydraulic
efficiency, a plurality of water delivery mechanisms 30 may be
clustered on a bracket 80 around and within the covering scope of
the slant board 20. The slant board 20 can drive the water delivery
mechanisms 30 to increase the hydraulic efficiency. It is to be
noted that during rotation of the slant board 20, the rotation
center 201 rotates on the same location where is not a desirable
location for installing the water delivery mechanisms 30.
[0025] Referring to FIG. 6, a plurality of water delivery
mechanisms 31 may also be directly and integrally formed in a strut
35. Namely a plurality of housing chambers 401 are formed
respectively on desired locations of the strut 35 by machining to
house respectively a piston 50.
[0026] Referring to FIGS. 7A and 7B, the slant board 20 may also be
pivotally coupled on the power output shaft 10. An adjustment bolt
90 is coupled on an anchor board 91 which is fixedly mounted on the
power output shaft 10. An adjustment rod 92 is provided that has
two ends pivotally coupled on the slant board 20 and the adjustment
bolt 90. By adjusting the adjustment bolt 90, the angle .theta.
between the normal line of the slant board 20 and the axis 11 may
be altered to change the displacement of the piston 50.
Consequently the amount of water being pumped may be changed.
Therefore the angle .theta. may be adjusted according to water
requirement. Moreover, in order to avoid deviation of the power
output shaft 10, a plurality of adjustment bolts 90 may be provided
and evenly and symmetrically spaced on the anchor board 91 relative
to the power output shaft 10.
[0027] Referring to FIG. 8, the slant board 20 may also have a
circular trough 21 formed on the surface that is coaxial with the
rotation center 201. The piston 50 is fastened to a guiding member
22 which is wedged in the circular trough 21. When the slant board
20 rotates, the piston 50 is driven to move reciprocally in the
housing chamber 401. Referring to FIG. 9, a circular track 23 may
also be adhered to the slant board 20 to couple with a guiding
member 24 fastened to the piston 50. Similarly, when the slant
board 20 rotates, the piston 50 is driven to move reciprocally in
the housing chamber 401. If adjusting the angle .theta. is required
for the fourth and fifth embodiments, the mechanism employed in the
third embodiment may be adopted. In such an occasion, the guiding
members 22 and 24 and the piston 50 have to be bridged by a
universal joint (not shown in the drawings) to prevent the rotation
of the slant board from being hindered after the angle .theta. has
been adjusted.
[0028] In summary, the hydraulic pump according to the invention
uses the piston 50 to compress water and move the water from the
low level water supply zone to the high level water supply zone. It
does not have friction loss occurred to the conventional arched
vane. It can pump the water to the high level water supply zone at
a higher hydraulic efficiency and a higher water level.
[0029] While the preferred embodiments of the invention have been
set forth for the purpose of disclosure, modifications of the
disclosed embodiments of the invention as well as other embodiments
thereof may occur to those skilled in the art. Accordingly, the
appended claims are intended to cover all embodiments which do not
depart from the spirit and scope of the invention.
* * * * *