U.S. patent application number 12/647993 was filed with the patent office on 2011-06-30 for screw pump with anti-turbulent structure.
This patent application is currently assigned to SUNNY KING MACHINERY CO., LTD.. Invention is credited to Ding-Kuey LIU, Chao-Hua TUNG.
Application Number | 20110158841 12/647993 |
Document ID | / |
Family ID | 44187803 |
Filed Date | 2011-06-30 |
United States Patent
Application |
20110158841 |
Kind Code |
A1 |
LIU; Ding-Kuey ; et
al. |
June 30, 2011 |
Screw Pump with Anti-Turbulent Structure
Abstract
A screw pump with anti-turbulent structure has a housing, at
least two screw rotors parallelly mounted through the housing and
engaging with each other, and a partition disposed around the at
least two screw rotor. The partition may have at least two circular
walls respectively formed around the rotors and an annular
protrusion formed on an inner surface of the housing and being
adjacent to and kept from contacting the at least two circular
walls, and may be a panel having at least two mounting holes
respectively mounted around the rotors. Fluids flowing in opposite
directions are divided by the partition and do not encounter each
other and do not become turbulent. Consequently, pressurizing
efficiency of the screw pump is improved.
Inventors: |
LIU; Ding-Kuey; (Taipei
Hsien, TW) ; TUNG; Chao-Hua; (Taipei Hsien,
TW) |
Assignee: |
SUNNY KING MACHINERY CO.,
LTD.
Taipei Hsien
TW
|
Family ID: |
44187803 |
Appl. No.: |
12/647993 |
Filed: |
December 28, 2009 |
Current U.S.
Class: |
418/202 |
Current CPC
Class: |
F04C 2240/30 20130101;
F04C 11/001 20130101; F04C 2/086 20130101; F04C 14/02 20130101;
F04C 15/06 20130101; F01C 21/106 20130101; F04C 2/16 20130101 |
Class at
Publication: |
418/202 |
International
Class: |
F04C 2/16 20060101
F04C002/16; F04C 2/08 20060101 F04C002/08 |
Claims
1. A screw pump comprising a housing having an inlet formed in and
communicating the housing; and an outlet formed in and
communicating the housing; at least two screw rotors axially and
parallelly mounted rotatably through the housing, each screw rotor
having two threaded parts formed around the screw rotor and being
respectively right-hand threaded and left-hand threaded, and each
threaded part engaging a corresponding threaded part of the other
one of the at least two screw rotors; and a partition mounted in
the housing, disposed around the at least two screw rotors and
between the threaded parts of each screw rotor and having at least
two circular walls respectively formed around the at least two
screw rotors and being adjacent to and kept from contacting each
other.
2. The screw pump as claimed in claim 1, wherein the housing
further has a mounting tube axially formed on an inner surface of
the housing and having an annular recess formed in and around an
inner wall of the mounting tube; the outlet of the housing is
formed in the housing and the mounting tube and communicates with
the mounting tube and corresponds to the annular recess of the
mounting tube; the at least two screw rotors are mounted through
the mounting tube; and the partition is mounted in the mounting
tube and further has an annular protrusion formed on the inner wall
of the mounting tube in the annular recess and being adjacent to
and kept from contacting the at least two circular walls.
3. A screw pump comprising a housing having an inlet formed in and
communicating the housing; and an outlet formed in and
communicating the housing; at least two screw rotor axially and
parallelly mounted rotatably through the housing, each screw rotor
having two threaded parts formed around the screw rotor and being
respectively right-hand threaded and left-hand threaded, and each
threaded part engaging a corresponding threaded part of the other
one of the at least two screw rotors; and a partition mounted in
the housing, disposed around the at least two screw rotors and
between the threaded parts of each screw rotor, being a panel
having at least two mounting holes formed through the partition and
respectively mounted around the at least two rotors, and each
mounting hole having an inner edge respectively defined around the
mounting holes and being adjacent to and kept from contacting a
corresponding one of the at least two screw rotors.
4. The screw pump as claimed in claim 1, wherein the housing
further has a mounting tube axially formed on an inner surface of
the housing and having an annular recess formed in and around an
inner wall of the mounting tube; the outlet of the housing is
formed in the housing and the mounting tube and communicates with
the mounting tube and corresponds to the annular recess of the
mounting tube; and the at least two screw rotors are mounted
through the mounting tube.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a screw pump, especially to
a screw pump with an anti-turbulent structure to prevent
pressurized fluid from becoming turbulent.
[0003] 2. Description of the Prior Art(s) A pump transfers
mechanical work to fluids, such as liquids or gases, to change
states (ex: height, pressure . . . etc.) of the fluid to move the
fluids.
[0004] With reference to FIG. 5, a conventional screw pump (50)
comprises a housing (51) having an inlet (511) and an outlet (512),
and two screw rotors (52) axially and parallelly mounted rotatably
through the housing (51). Each screw rotor (52) has two threaded
parts (521) respectively engaging the threaded parts (521) of the
other screw rotor (52). Thus, when one of the screw rotor (52) is
rotated, the other screw rotor (52) rotates simultaneously. A
confluence is defined between the threaded parts (521) of each
screw rotor (52) and corresponds to the outlet (512) of the housing
(52). When the fluids flow through the inlet (511) and into the
housing (51) and one of the screw rotor (52) is driven by a motor,
the threaded parts (521) of the screw rotors (52) force the fluid
toward the confluence and flow out of the housing (51) from the
outlet (512).
[0005] However, since the threaded parts (521) of the screw rotors
(52) move the fluids in reverse directions, the fluids encounter
each other and become turbulent in the confluence of the rotors
(52). Thus, pressures of the fluids are reduced and pressurizing
efficiency of the conventional screw pump (50) is low and cannot be
efficiently raised.
[0006] To overcome the shortcomings, the present invention provides
a screw pump with an anti-turbulent structure to mitigate or
obviate the aforementioned problems.
SUMMARY OF THE INVENTION
[0007] The main objective of the present invention is to provide a
screw pump with an anti-turbulent structure.
[0008] The screw pump has a housing, at least two screw rotors
parallelly mounted through the housing and engaging with each
other, and a partition disposed around the at least two screw
rotor. The partition may have at least two circular walls
respectively formed around the rotors and an annular protrusion
formed on an inner surface of the housing and being adjacent to and
kept from contacting the at least two circular walls, and may be a
panel having at least two mounting holes respectively mounted
around the rotors.
[0009] Fluids flowing in opposite directions are divided by the
partition and do not encounter each other and do not become
turbulent. Consequently, pressurizing efficiency of the screw pump
is improved.
[0010] Other objectives, advantages and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a side view in partial section of a screw pump
with an anti-turbulent structure in accordance with the present
invention;
[0012] FIG. 2 is a top view in partial section of the screw pump in
FIG. 1;
[0013] FIG. 3 is a top view in partial section of another
embodiment of a screw pump with an anti-turbulent structure in
accordance with the present invention;
[0014] FIG. 4 is a cross-sectional end view of the screw pump in
FIG. 3; and
[0015] FIG. 5 is a side view in partial section of a conventional
screw pump in accordance with the prior art.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0016] With reference to FIGS. 1 to 3, a screw pump with an
anti-turbulent structure in accordance with the present invention
comprises a housing (10), at least two screw rotors (20) and a
partition (30A, 30B).
[0017] The housing (10) is substantially cylindrical and has a
mounting tube (11), an inlet (12) and an outlet (13). The mounting
tube (11) is axially formed on an inner surface of the housing (10)
and has an annular recess (111). The annular recess (111) is formed
in and around an inner wall of the mounting tube (11). The inlet
(12) is formed in and communicates with the housing (10). The
outlet (13) is formed in and communicates with the housing (10),
may be formed in the housing (10) and the mounting tube (11), may
be communicates with the mounting tube (11) and may correspond to
the annular recess (111) of mounting tube (11).
[0018] The at least two screw rotors (20) are axially and
parallelly mounted rotatably through the housing (10) and may be
mounted through the mounting tube (11). Each screw rotor (20) has
two threaded parts (22). The threaded parts (22) are formed around
the screw rotor (20) and are respectively right-hand threaded and
left-hand threaded. Each threaded part (22) engages a corresponding
threaded part (22) of the other one of the at least two screw
rotors (20).
[0019] A confluence is defined between the threaded parts (22) of
the at least two screw rotors (20). Thus, as one of the at least
two rotors (20) rotates, the other of the at least two screw rotors
(20) rotates simultaneously. When fluids flow through the inlet
(12) and into the housing (10) and one of the at least two screw
rotors (20) is driven by a motor, the threaded parts (22) force the
fluids from two opposite ends of the housing (10) or from two
opposite ends of the mounting tube (11) toward the confluence and
pressurize the fluids.
[0020] The partition (30A, 30B) is mounted in the housing (10), may
be mounted in the mounting tube (11), is disposed around the at
least two screw rotors (20) and between the threaded parts (22) of
each screw rotor (20) and divides the confluence into two
individual spaces. Therefore, the pressurized fluids flowing in
opposite directions respectively flow along the partition (30A,
30B) and out of the housing (10) from the outlet (13).
[0021] The partition (30A) may have at least two circular walls
(31A) and an annular protrusion (32A). The at least two circular
walls (31A) are respectively formed around the at least two screw
rotors (20) and are adjacent to and are kept from contacting each
other. The annular protrusion (32A) is formed on the inner wall of
the mounting tube (11) in the annular recess (111) and is adjacent
to and is kept from contacting the at least two circular walls
(31A) so the at least two rotors (20) can rotate smoothly.
[0022] With further reference to FIGS. 3 and 4, the partition (30B)
may be a panel, may be composed of two halves (30B') and has at
least two mounting holes (33B). The at least two mounting holes
(33B) are formed through the partition (30B) and are respectively
mounted around the at least two rotors (20). Each mounting hole
(33B) has an inner edge. The inner edge of the mounting hole (33B)
is defined around the mounting holes (33B) and is adjacent to and
is kept from contacting a corresponding one of the at least two
screw rotors (20) so the at least two rotors (20) can rotate
smoothly.
[0023] The screw pump with anti-turbulent structure as described
has the following advantage. Since the partition (30A, 30B) divides
the confluence into two individual spaces, the fluids flow in
opposite directions do not encounter each other and do not become
turbulent in the confluence. Consequently, pressurizing efficiency
of the screw pump is improved.
[0024] Even though numerous characteristics and advantages of the
present invention have been set forth in the foregoing description,
together with details of the structure and features of the
invention, the disclosure is illustrative only. Changes may be made
in the details, especially in matters of shape, size, and
arrangement of parts within the principles of the invention to the
full extent indicated by the broad general meaning of the terms in
which the appended claims are expressed.
* * * * *