CN107605724A - 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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- CN107605724A CN107605724A CN201710727473.5A CN201710727473A CN107605724A CN 107605724 A CN107605724 A CN 107605724A CN 201710727473 A CN201710727473 A CN 201710727473A CN 107605724 A CN107605724 A CN 107605724A
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- pump housing
- pump
- bushing
- stator
- 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；Described swirl-flow devices include spiral stator, stator inwall 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 steam vent；The upper end of described stator inwall is connected with pump housing flange, and lower end is located above the lower end of bushing；Stator inwall entangles bushing and has gap between bushing, and the cavity that gap is formed is connected with the steam vent of pump housing flange；Spiral stator is installed on stator inwall.The pump housing bottom end cover cross section is circular arc.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 stator is bonded with pump housing inner wall surface.Bubble in medium is reduced in bushing entrance by apparatus of the present invention, suitable for more mixing alveolate wide in range medium, lift 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
Bar pump is widely used in the industries such as ship and petrochemical industry with advantages such as its reliability height, small volume, low noises.In the profit of ship
Lubricating oil and Fuel System instead of piston pump and gear pump substantially, and with the progressively 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 its driving lever and follower lever are mutual in screw rod bushing
Engagement, its spiral slot space formed when engaging can obstruct suction chamber and discharge chamber completely so that three screw pump can reach
Higher pressure.But due to the accurate engagement process of three screw pump, 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 cause volumetric efficiency to decline to a great extent, noise increase.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 because dielectric property makes
Obtain the use that three screw pump is still difficult to substitute Quimby pump.It is past during practical application by taking marine shafting lubricating oil three screw pump as an example
It is small that fuel tank oil reserve is circulated toward the performance for not reaching factory floor experiment, in the case of practical application, and in lubricating oil circulation industrial
A large amount of bubbles can be mixed into during work, the working environment that this also results in three screw pump is very severe.This causes three screw pump not
With the state normal work of design, the properties of three screw pump can be largely reduced.
In order that obtaining three screw pump, service behaviour is more stable in actual applications, reduces in medium and is mixed into bubble to three spiral shells
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,
By extruding of the medium centrifugal force to bubble, bubble is 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 stable.
The content of the invention
It is an object of the invention to provide a kind of wide in range medium three that steady operation is remained in the case of medium is mixed with bubble
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；Described swirl-flow devices are led including spiral
Leaf, stator inwall 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 described stator inwall is connected with pump housing flange, and lower end is located above the lower end of bushing；Stator inwall entangles bushing
And having gap between bushing, the cavity that gap is formed is connected with the steam vent of pump housing flange；Spiral stator is installed in stator
On wall.
The present invention can also include：
1. the pump housing bottom end cover cross section is circular arc.
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 stator is bonded with pump housing inner wall surface.
The present invention has the advantages that：
After 1. apparatus of the present invention make it that mixing alveolate medium enters three screw pump, pass through the pump body structure of the invention designed
Bubble is reduced in bushing entrance, make three screw pump be applied to more mix alveolate wide in range medium, lift three screw pump
Stability.
2. coordinated by setting import, spiral stator to pressurize in pump housing side with the pump housing bottom end cover with circular cross-section,
So that forming larger eddy flow in the pump housing, gas-liquid separation effect in medium is lifted.
Brief 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.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
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 stator 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 up of the pump housing 4 and the two parts of pump housing bottom end cover 6, and pump body portion is vertical walls, and pump housing bottom end cover is arc
Face, the two together forms swirl-flow devices with spiral stator 5.Be connected the pump housing on the bushing 11 of the lower section of three screw pump outlet(discharge) flange 10
Flange 3, pump housing flange 3 are provided with steam vent；The upper end of described stator inwall is connected with pump housing flange 3, and lower end is located at bushing 11
Lower end above；Stator inwall entangles bushing 11 and has gap between bushing 11, the cavity that gap is formed and pump housing flange 3
Steam vent is connected；Spiral stator 5 is installed on stator inwall.
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, based on general three screw pump structure, redesign three screw pump Each part, make
Alveolate medium must be mixed into after three screw pump, 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 to enter three screw pump containing alveolate medium
Do not influence three screw pump service behaviour 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 designs comprising a kind of three screw pump structure and corresponding snout cavity bubble separation, snout cavity bubble separation
Design is main to include pump housing import, pump body structure, spiral stator, gas vent and bushing import.
The pump housing inlet design, general three screw pump inlet design are vertical in three screw pump pump housing bottom, pump housing import
In three screw pump body axis.In order to form initial eddy flow, entrance location is changed to along the cylindrical tangential direction of the pump housing；In order to which eddy flow exists
Snout cavity has longer development time, and entrance location is arranged on into 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
Footpath 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 checking needs to realize by finite element simulation.In order to be separated gas from medium by eddy flow, after eddy flow is sufficiently formed
Pump housing bottom is designed as circular arc by air accumulation to overhead gas outlet port by the direction for needing to change centrifugal force.
The spiral stator, is mainly made up of stator inwall and stator two parts, stator inwall play separate snout cavity and
The effect of gas vent chamber, stator further develop for promotion eddy flow.Region is import cavity region between stator inwall and the pump housing,
Medium accelerates the formation of fluid eddy flow by stator in this region, and import intracavity gas are verified by means such as simulation calculations
Distribution situation.By the boundary position for the gas distribution design gas vent chamber being calculated, gas vent chamber is located in stator
Between wall and liner outer wall.
The gas vent and bushing import, eddy flow is formed in snout cavity, and cause 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 bottom.
Spiral stator upper end is connected by screw bolts with pump housing outlet flange, and stator upper limb is concordant with entrance location, works as medium
Strong cyclonic effect will be produced in suction chamber by spiral stator guide functions into during suction chamber, and continues to keep by spiral stator
The strong eddy flow state of medium.Medium is by entering suction chamber bottom after spiral stator.Suction chamber bottom has certain radian, suction
Bottom of chamber portion can change medium eddy flow state.
In spiral guide vane section, medium flows along vertical cavity wall and spiral stator, 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 think 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 with surrounding infinitesimal to the power of the fluid infinitesimal, but cavitating region due to
Quality is small so centrifugal force is smaller, thus only when radius of turn also reduces could confining force 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 bottom, it is situated between
Mass flow moves state change, and in the state of eddy flow is remained in that, wall causes internal fluid with crowded upwards with certain inclination angle
The internal force of pressure, further give the composition mixed in the medium for have collected in pivot upward driving force.
Structure, and the bubble that profit can be formed in good separating medium with the aforedescribed process are rationally designed, it is final to cause
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
Steep oneself-meeting and gather near the pivot of snout cavity, because screw rod-bushing entrance region of three screw pump also is located on this position,
If design it is unreasonable if can directly result in bubble coalescence in screw rod-bushing entrance region, this will substantially reduce screw pump performance.In order to
Allow bubble to collect in chamber central but remote screw rod-bushing entrance region, the design in the cambered surface region of snout cavity bottom are most important.
Because cambered surface changes the flow regime of eddy flow, the fluid flow state after change produces the power gathered to center to bubble incessantly,
A power straight up is produced simultaneously so that bubble is assembled upwards.Screw rod-bushing entrance region is arranged under arc area
Portion, the region of bubble concentration is avoided completely.And in order to export bubble, it is necessary to by bubble with enter screw rod-bushing conveying
Medium shunt.By FEM calculation, bubble will be assembled in spiral stator exit close to the position of pivot, serve as a contrast
Devise the fluid passage of the medium containing more bubble between set outer wall and spiral stator inwall, and due to persistently by under
The effect of the upward power of portion's eddy flow, this certain media is by outside the fluid issuing excavationg pump by snout cavity flange.
Simultaneously in order to meet to assemble and manufacture the needs of, due to unidirectional flange connection at two on the pump housing be present, this
The problems such as machining accuracy may be caused, is so that assembling is 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 with discharging the volume of chamber 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 considerable influence to equipment performance.
Claims (5)
1. a kind of wide in range medium three screw pump, including three screw pump and swirl-flow devices；Characterized in that, described swirl-flow devices bag
Include spiral stator, stator inwall 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 steam vent；The upper end of described stator inwall is connected with pump housing flange, and lower end is located above the lower end of bushing；Stator inwall
Entangle bushing and have gap between bushing, the cavity that gap is formed is connected with the steam vent of pump housing flange；Spiral stator is installed
In on stator inwall.
2. a kind of wide in range medium three screw pump as claimed in claim 1, it is characterised in that the pump housing bottom end cover cross section is
Circular arc.
3. a kind of wide in range medium three screw pump as claimed in claim 1 or 2, it is characterised in that the import of three screw pump is located at
Pump housing side and below the pump housing flange；Suction flange is individual components, and outer ring is sealed with the pump housing, and inner ring enters with bushing
Row sealing.
4. a kind of wide in range medium three screw pump as claimed in claim 1 or 2, it is characterised in that the outside of spiral stator and pump
Internal wall surface fitting.
5. a kind of wide in range medium three screw pump as claimed in claim 3, it is characterised in that in the outside and the pump housing of spiral stator
Wall surface is bonded.
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 true CN107605724A (en) | 2018-01-19 |
| CN107605724B CN107605724B (en) | 2018-10-26 |
Family
ID=61065832
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
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| CN (1) | CN107605724B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107605724B (en) | 2018-10-26 |
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