CN107605724B - A kind of wide in range medium three screw pump - Google Patents
A kind of wide in range medium three screw pump Download PDFInfo
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- CN107605724B CN107605724B CN201710727473.5A CN201710727473A CN107605724B CN 107605724 B CN107605724 B CN 107605724B CN 201710727473 A CN201710727473 A CN 201710727473A CN 107605724 B CN107605724 B CN 107605724B
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- pump housing
- pump
- guide vane
- bushing
- screw pump
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Abstract
A kind of wide in range medium three screw pump includes：Three screw pump and swirl-flow devices；The swirl-flow devices include spiral guide vane, guide vane inner wall and pump housing bottom end cover；Be connected pump housing flange on the bushing of three screw pump outlet lower section, and pump housing flange is provided with gas vent；The upper end of the guide vane inner wall and pump housing flanged joint, lower end are located above the lower end of bushing；Guide vane inner wall entangles bushing and has gap between bushing, and the cavity that gap is constituted is connected with the gas vent of pump housing flange；Spiral guide vane is installed on guide vane inner wall.Pump housing bottom end cover cross section is arc-shaped.The import of three screw pump is located at pump housing side and below pump housing flange；Suction flange is individual components, and outer ring is sealed with the pump housing, and inner ring is sealed with bushing.The outside of spiral guide vane is bonded with pump housing inner wall surface.Device makes bubble in medium be reduced in bushing entrance through the invention, is suitable for more mixing bladdery wide in range medium, promotes the stability of three screw pump.
Description
Technical field
The invention belongs to pump, and in particular to a kind of wide in range medium three screw pump.
Background technology
Screw pump is a kind of volume type rotor pump, is intermeshed by screw rod medium being delivered to outlet from import.Three spiral shells
With its reliability, the advantages such as high, small, low noise are widely used in the industries such as ship and petrochemical industry to bar pump.In the profit of ship
Lubricating oil and Fuel System are substantially instead of piston pump and gear pump, and with the gradually hair of high-pressure high-flow three screw pump
Exhibition, three screw pump also form the huge advantage to Quimby pump in many industries.
Three screw pump belongs to closed type screw pump on textural classification, and driving lever is mutual in screw rod bushing with follower lever
Engagement, the spiral slot space constituted when engaging can obstruct suction chamber and discharge chamber completely so that three screw pump can reach
Higher pressure.But due to the engagement process of three screw pump precision, cause three screw pump higher to medium requirements, transport is mixed with solid
The medium of body particle or a large amount of bubbles can damage three screw pump or volumetric efficiency is caused to decline to a great extent, and noise increases.For being situated between
This feature of the bad adaptability of matter significantly limits the application of three screw pump.Such as in industries such as petrochemical industries, although
Three screw pump flow can meet actual demand, and properties are better than Quimby pump, but since dielectric property makes
Three screw pump is obtained still to be difficult to substitute the use of Quimby pump.By taking marine shafting lubricating oil three screw pump as an example, when practical application, is past
It is small that fuel tank oil reserve is recycled toward the performance that factory floor experiment is not achieved, in the case of practical application, and in lubricating oil circulation industrial
A large amount of bubbles can be mixed into during work, this also results in the working environment of three screw pump very severe.This makes three screw pump not
It can be worked normally with the state of design, largely reduce the properties of three screw pump.
In order to enable three screw pump in practical applications more stablize by working performance, reduces in medium and be mixed into three spiral shell of bubble pair
The performance of bar pump impacts, and develops a kind of wide in range medium three screw pump.The three screw pump is made by the design of inlet channel
Medium forms eddy flow state in snout cavity, the centrifugal force rotated by medium by lighter bubble coalescence to eddy flow center,
Extruding by medium centrifugal force to bubble, bubble are discharged by bubble exit, ensure that in three screw pump bushing entrance gas
Bubble quantity greatly reduces so that three screw pump operation is more stablized.
Invention content
It being mixed with the wide in range medium three that bubble remains to steady operation in medium the purpose of the present invention is to provide a kind of
Screw pump.
The object of the present invention is achieved like this：
A kind of wide in range medium three screw pump includes：Three screw pump and swirl-flow devices；The swirl-flow devices include that spiral is led
Leaf, guide vane inner wall and pump housing bottom end cover；Be connected pump housing flange on the bushing of three screw pump outlet lower section, and pump housing flange is provided with exhaust
Hole；The upper end of the guide vane inner wall and pump housing flanged joint, lower end are located above the lower end of bushing；Guide vane inner wall entangles bushing
And having gap between bushing, the cavity that gap is constituted is connected with the gas vent of pump housing flange；Spiral guide vane is installed in guide vane
On wall.
The present invention can also include：
1. pump housing bottom end cover cross section is arc-shaped.
2. the import of three screw pump is located at pump housing side and below pump housing flange；Suction flange is individual components, outside
Circle is sealed with the pump housing, and inner ring is sealed with bushing.
3. the outside of spiral guide vane is bonded with pump housing inner wall surface.
The present invention has the advantages that：
1. apparatus of the present invention to mix the pump body structure after bladdery medium enters three screw pump, designed through the invention
So that bubble is reduced in bushing entrance, makes three screw pump be suitable for more mixing bladdery wide in range medium, promote three screw pump
Stability.
2. by the way that import is arranged in pump housing side, spiral guide vane pressurizes and the pump housing bottom end cover with circular cross-section coordinates,
So that forming larger eddy flow in the pump housing, gas-liquid separation effect in medium is promoted.
Description of the drawings
Fig. 1 is the front section view of apparatus of the present invention.
Fig. 2 is the side sectional view of apparatus of the present invention.
Fig. 3 is the overall structure diagram of apparatus of the present invention.
Fig. 4 is the makeup of the imports schematic diagram of apparatus of the present invention.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, present invention is further described in detail.
As Figure 1-Figure 4, a kind of wide in range medium three screw pump includes：Mechanical seal 1, bushing flange 2, pump housing flange 3,
The pump housing 4, spiral guide vane 5, pump housing bottom end cover 6, bearing box cover 7, bearing housing 8, rolling bearing 9, outlet(discharge) flange 10, bushing 11, master
Dynamic screw rod 12, driven screw 13 and balance set 14.
The pump housing is made of the pump housing 4 and 6 two parts of pump housing bottom end cover, and pump body portion is vertical walls, and pump housing bottom end cover is arc
Face, the two have been formed together swirl-flow devices with spiral guide vane 5.Be connected the pump housing on the bushing 11 of 10 lower section of three screw pump outlet(discharge) flange
Flange 3, pump housing flange 3 are provided with gas vent；The upper end of the guide vane inner wall is connect with pump housing flange 3, and lower end is located at bushing 11
Lower end above；Guide vane inner wall entangles bushing 11 and has gap between bushing 11, the cavity that gap is constituted and pump housing flange 3
Gas vent is connected；Spiral guide vane 5 is installed on guide vane inner wall.
The present invention uses following technical scheme：
It is an object of the invention to design kind of a wide in range medium three screw pump structure, to realize such a purpose, and consider
Retain the original structural advantage of three screw pump, be based on general three screw pump structure, redesigns three screw pump Each part, make
It must mix after bladdery medium enters three screw pump, so that bubble is reduced in bushing entrance by special pump body structure.
In order to ensure not change the original structural advantages of three screw pump and so that enter three screw pump containing bladdery medium
It does not influence three screw pump working performance afterwards, three screw pump pump housing intake chamber is redesigned.The flow-like of three screw pump
State depends mainly on entrance location and cavity body structure, and the present invention reaches three screw pump by designing pump body structure and bush structure
Snout cavity separates the effect of bubble.
The present invention includes that a kind of three screw pump structure and corresponding snout cavity bubble separation design, snout cavity bubble separation
Design includes mainly pump housing import, pump body structure, spiral guide vane, gas vent and bushing import.
The pump housing inlet design, for general three screw pump inlet design in three screw pump pump housing lower part, pump housing import is vertical
In three screw pump body axis.In order to form initial eddy flow, entrance location is changed to along pump housing outer circle tangential direction；In order to which eddy flow exists
Snout cavity has longer development time, and entrance location is arranged in snout cavity topmost.Entrance location forms initial eddy flow
Primary condition.The pump body structure design, the general three screw pump pump housing include snout cavity and outlet plenum.In the present invention, in order to
The design of gas vent and given up outlet plenum, i.e., be snout cavity in the pump housing, medium is by screw rod work done from bushing upper end outlet
It is expelled directly out.In order to form initial turbulence, it is necessary first to consider the ratio of import caliber and pump housing diameter.It has been generally structure design
Compactedness, pump housing diameter is smaller, and turbulent flow is formed very difficult if import caliber and pump housing diameter ratio are larger, if inlet tube
Diameter is smaller with pump housing diameter ratio, and vacuole can be formed in the middle part of snout cavity, so appropriate selection pump housing diameter is needed, if
Meter verification needs to realize by finite element simulation.In order to be detached gas from medium by eddy flow, after eddy flow is sufficiently formed
It needs the direction for changing centrifugal force by air accumulation to overhead gas outlet port, pump housing lower part is designed as arc-shaped.
The spiral guide vane, is mainly made of guide vane inner wall and guide vane two parts, guide vane inner wall play separate snout cavity and
The effect of gas vent chamber, guide vane are that eddy flow is promoted further to develop.Region is import cavity region between guide vane inner wall and the pump housing,
Medium accelerates the formation of fluid eddy flow by guide vane in this region, and import intracavity gas is verified by means such as simulation calculations
Distribution situation.The boundary position of gas distribution design gas vent chamber obtained by calculation, gas vent chamber are located in guide vane
Between wall and liner outer wall.
The gas vent and bushing import form eddy flow in snout cavity, and make gas and liquid in snout cavity
Redistribution, gas vent need to take into account that mouth cavity fluid is distributed with the design of bushing entrance location, and bushing entrance location is located at liquid
Body concentrated position, gas vent position are located at gas concentration zones.Gas vent is located at snout cavity top, and bushing import is located at import
Chamber lower part.
Spiral guide vane upper end is connected by screw bolts with pump housing outlet flange, and guide vane upper limb is concordant with entrance location, works as medium
Strong cyclonic effect will be generated in suction chamber by spiral guide vane guide functions into when suction chamber, and continue to keep by spiral guide vane
The strong eddy flow state of medium.Medium is by entering suction chamber bottom after spiral guide vane.Suction chamber bottom has certain radian, sucking
Bottom of chamber portion can change medium eddy flow state.
In spiral guide vane section, medium is flowed along vertical cavity wall and spiral guide vane, and eddy flow medium will form centrifugal force, according to
If continuous media and discrete bubble therein are considered as micro unit discrete one by one by mechanics principle, if consideration medium is Newtonian liquid
Body approximately thinks that fluid media (medium) linear velocity is equal everywhere, the size of centrifugal force and quality it is proportional with radius of turn in anti-
Than, centrifugal force suffered by each fluid infinitesimal mutually balances the power of the fluid infinitesimal with surrounding infinitesimal, however cavitating region due to
Quality is small so centrifugal force is smaller, thus only when radius of turn also reduces could retentivity balance, therefore eddy flow can drive Jie
The immiscible lighter component mixed in matter gathers the position of centre of gravity of eddy flow.And when eddy flow medium enters suction chamber lower part, it is situated between
Matter flow regime changes, and in the state of still maintaining eddy flow, wall surface makes internal fluid with crowded upwards with certain inclination angle
The internal force of pressure further gives the ingredient mixed in the medium for have collected in rotation center upward driving force.
Structure is rationally designed, and profit can form the bubble in good separating medium with the aforedescribed process, it is final to make
Air concentration substantially reduces in medium near screw rod-bushing entry zone.Pass through Fluent fluid finite element emulation softwares pair
Three screw pump import cavity region carries out simulation calculation, and instructs actual design according to simulation calculation.Due to the generation gas of eddy flow
It steeps oneself-meeting and gathers near the rotation center of snout cavity, since screw rod-bushing entrance region of three screw pump also is located on this position,
Bubble coalescence can be directly resulted in screw rod-bushing entrance region if design is unreasonable, this will substantially reduce screw pump performance.In order to
It allows bubble to collect in chamber central but far from screw rod-bushing entrance region, the design in the cambered surface region of snout cavity bottom is most important.
Since cambered surface changes the flow regime of eddy flow, the fluid flow state after change generates the power gathered to center to bubble incessantly,
A power straight up is generated simultaneously so that bubble is assembled upwards.Screw rod-bushing entrance region is arranged under arc area
Portion avoids the region of bubble concentration completely.And it in order to export bubble, needs bubble and the conveying for entering screw rod-bushing
Medium shunt.By FEM calculation, bubble will be assembled in spiral guide vane exit close to the position of rotation center, serve as a contrast
Devise the fluid channel of the medium containing more bubble between set outer wall and spiral guide vane inner wall, and due to persistently under
The effect of the upward power of portion's eddy flow, this certain media will be outside the fluid outlet discharge pumps by snout cavity flange.
Simultaneously in order to meet assembly and manufacture the needs of, due on the pump housing there are unidirectional flanged joint at two, this
It may lead to problems such as machining accuracy that assembly is made to be unable to reach seal request, therefore suction flange is individual components, outer ring and pump
Body is sealed, and inner ring is sealed with bushing, largely reduces the required precision of manufacture and assembly.While in order to arrange
Each structure, in the case where ensureing original pump housing volume, discharge cavity volume greatly reduces, but due to many three screw rods on the market
Pump largely reduces suction chamber and the volume that chamber is discharged to reduce equipment volume in design, and also has good
Equipment performance, it is possible to think that the design for reducing discharge chamber volume will not produce bigger effect equipment performance.
Claims (3)
1. a kind of wide in range medium three screw pump, including three screw pump and swirl-flow devices；It is characterized in that, the swirl-flow devices packet
Include spiral guide vane, guide vane inner wall and pump housing bottom end cover；Be connected pump housing flange on the bushing of three screw pump outlet lower section, pump housing flange
It is provided with gas vent；The upper end of the guide vane inner wall and pump housing flanged joint, lower end are located above the lower end of bushing；Guide vane inner wall
It entangles bushing and has gap between bushing, the cavity that gap is constituted is connected with the gas vent of pump housing flange；Spiral guide vane is installed
In on guide vane inner wall；Pump housing bottom end cover cross section is arc-shaped, and bushing entrance region is arranged in arc area lower part.
2. a kind of wide in range medium three screw pump as described in claim 1, which is characterized in that the import of three screw pump is located at the pump housing
Side and below pump housing flange；Suction flange is individual components, and outer ring is sealed with the pump housing, and inner ring carries out close with bushing
Envelope.
3. a kind of wide in range medium three screw pump as claimed in claim 1 or 2, which is characterized in that the outside of spiral guide vane and pump
Internal wall surface fitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727473.5A CN107605724B (en) | 2017-08-23 | 2017-08-23 | A kind of wide in range medium three screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710727473.5A CN107605724B (en) | 2017-08-23 | 2017-08-23 | A kind of wide in range medium three screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107605724A CN107605724A (en) | 2018-01-19 |
| CN107605724B true CN107605724B (en) | 2018-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710727473.5A Active CN107605724B (en) | 2017-08-23 | 2017-08-23 | A kind of wide in range medium three screw pump |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113843064A (en) * | 2021-10-15 | 2021-12-28 | 广东博智林机器人有限公司 | Feeding device and spraying machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06210106A (en) * | 1993-01-21 | 1994-08-02 | Ishikawajima Harima Heavy Ind Co Ltd | Defoaming device for micro-gravity environment |
| CN201184183Y (en) * | 2008-03-06 | 2009-01-21 | 大庆石油学院 | De-sanding and de-gassing device of oil extraction screw pump |
| JP2009136817A (en) * | 2007-12-10 | 2009-06-25 | Itec Co Ltd | Gas-generating reaction apparatus having function of separating solid from gas |
| CN202012341U (en) * | 2011-04-25 | 2011-10-19 | 高淑梅 | High efficiency gas anchor for screw pump |
| CN106523477A (en) * | 2016-08-31 | 2017-03-22 | 天津成科传动机电技术股份有限公司 | Efficient online oil liquid bubble removing device |
| CN106949045A (en) * | 2017-04-26 | 2017-07-14 | 哈尔滨工程大学 | A kind of segmented high pressure three-screw pump |
-
2017
- 2017-08-23 CN CN201710727473.5A patent/CN107605724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06210106A (en) * | 1993-01-21 | 1994-08-02 | Ishikawajima Harima Heavy Ind Co Ltd | Defoaming device for micro-gravity environment |
| JP2009136817A (en) * | 2007-12-10 | 2009-06-25 | Itec Co Ltd | Gas-generating reaction apparatus having function of separating solid from gas |
| CN201184183Y (en) * | 2008-03-06 | 2009-01-21 | 大庆石油学院 | De-sanding and de-gassing device of oil extraction screw pump |
| CN202012341U (en) * | 2011-04-25 | 2011-10-19 | 高淑梅 | High efficiency gas anchor for screw pump |
| CN106523477A (en) * | 2016-08-31 | 2017-03-22 | 天津成科传动机电技术股份有限公司 | Efficient online oil liquid bubble removing device |
| CN106949045A (en) * | 2017-04-26 | 2017-07-14 | 哈尔滨工程大学 | A kind of segmented high pressure three-screw pump |
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| Publication number | Publication date |
|---|---|
| CN107605724A (en) | 2018-01-19 |
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