CN201144800Y - Multiphase stream screw rod mixing delivery pump - Google Patents
Multiphase stream screw rod mixing delivery pump Download PDFInfo
- Publication number
- CN201144800Y CN201144800Y CNU200720186203XU CN200720186203U CN201144800Y CN 201144800 Y CN201144800 Y CN 201144800Y CN U200720186203X U CNU200720186203X U CN U200720186203XU CN 200720186203 U CN200720186203 U CN 200720186203U CN 201144800 Y CN201144800 Y CN 201144800Y
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- CN
- China
- Prior art keywords
- screw rod
- pump
- discharge side
- multiphase flow
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a multiphase flow screw pump that comprises a pump body, a drive screw and a driven screw. The drive screw meshes with the driven screw. The screw pump is characterized in that a closed compression cavity is formed between the female rotor and the male rotor of the two meshing screws; an absorption cavity and a discharge cavity are formed respectively between the screws and the pump body; the pump body is provided with an unloading hole that is communicated with the compression cavity and the discharge cavity. Compared with the prior art, the automatic unloading holes are arranged on the pump body, so the high pressure in the compression cavity can be timely and automatically unloaded when the multiphase flow screw pump has a high conveying rate; the gas content in the conveyed material is 0 to 100 percent; and the structure effectively prevents the screws from being damaged, and prolongs the service life of the screws.
Description
Technical field
The utility model relates to employed oil gas conveying equipment in a kind of petroleum production, refers to that specifically a kind of multiphase flow screw rod mixes defeated pump.
Background technique
In the at present domestic petroleum production, generally near the oil field, build the roughing device of crude oil, carry out fine finishing, so not only increased the expense of infrastructure, and transportation expenses be also higher being transported to oil refinery after the crude oil roughing again.Therefore people wish can be by directly being transported to metering station with crude oil or crude oil processing factory saves production cost at a distance, the transfer efficiency of the transfer pump that is adopted has just become the key that addresses this problem with conveying capacity so.What use was maximum at present is the twin-screw multiphase mixing transmission pump, and this pump is a kind of displacement pump, and it rotates conveying material by active screw rod and two engagements of screw rod in the pump housing of driven screw rod; The intermeshing screw rod and the pump housing are formed the not connected fixed Seal cage of volume weighing apparatus, and suction chamber and discharge side are separated to come.When driven by motor initiatively during the screw rod rotation, these sealed volume carry institute's conveying material and do at the uniform velocity along axis that straight line moves, and just material are transported to outlet from inlet.Owing to be compressed the influence of chamber inner high voltage power, usually this class screw rod mix defeated pump can only be under the extremely low situation of gas content could proper functioning, its working efficiency reduces with the rising of gas content.In order to improve the transfer efficiency of the high oil of gas content, people post hope and improve transfer efficiency by the structure of improving tooth shape of screw.Screw rod after the improvement adopts the involute cycloidal tooth profile basically, can seal in order to make screw rod, has the length of parts of tooth must be greater than the helical pitch of driven screw rod on the screw rod.Mix defeated pump through improved screw rod and can carry gas content to be lower than 80% producing oil, and transfer efficiency also increases.But the problem that the pump of this kind structure brings thereupon is: along with the rotation of screw rod, because the material that sucks contains certain gas flow, described material is along with the rotation of screw rod, and its pressure in compression chamber is increasing, if untimely minute flowing pressure will damage machine so; If therefore can on the pump housing, be provided with can release mechanism, not only can shunt the pressure in the compression chamber in time, and can under the situation that does not influence transfer efficiency, carry the higher producing oil of gas content.Simultaneously, because the crude oil of exploiting out in the petroleum production process not only contains gas, also may contain solid particles such as silt.So press for and a kind ofly can carry the Crude Oil Transportation equipment that contains liquid, gas, solid three-phase.
Summary of the invention
Technical problem to be solved in the utility model is the situation at prior art, but the multiphase flow screw rod that a kind of automatic deloading is provided and has a high transfer efficiency mixes defeated pump.
Another technical problem to be solved in the utility model is the situation at prior art, provides a kind of multiphase flow screw rod that can carry the gas, liquid, solid three-phase and can not influence transfer efficiency to mix defeated pump.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: this multiphase flow screw rod mixes defeated pump, comprise the pump housing, intermeshing active screw rod, driven screw rod, it is characterized in that: form airtight compression chamber between the yin, yang rotor of two screw rods that are meshing with each other, form suction chamber and discharge side between the screw rod and the pump housing respectively, the described pump housing is provided with the unloading hole that is communicated with compression chamber and discharge side.When rotating under the drive of screw rod at motor, material enters the formed compression chamber of yin, yang rotor from suction chamber, and compression chamber carries institute's conveying material and moves along screw axis, and material is delivered to outlet from inlet; Meanwhile, the volume of compression chamber exports more and more littler from entering the mouth to, contained material is compressed in the chamber, pressure raises gradually along the flow direction of material, when the compression chamber internal pressure surpasses discharge side pressure, the compression chamber internal pressure can flow to outlet with the material in the discharge side from unloading hole automatic stream discharge side, realizes the pressure off-load in the compression chamber.The transfer efficiency that so not only can make this multiphase flow screw rod mix defeated pump improves greatly, and the gas content of institute's conveying material can reach 100%, has avoided the excessive and damage that the screw rod life-span is caused of compression chamber internal cause pressure simultaneously effectively.
Described unloading hole can specifically determine that preferably, the off-load flow velocity that can get the unloading hole place is 5～10 times that flow velocity is discharged in the outlet port according to concrete operating mode.
In order to guarantee the sealing of suction chamber and discharge side, can be provided with air-breathing seat in the ingress of described suction chamber, the outlet port of described discharge side is provided with exhaust seat, to avoid the leakage into and out of material.
Common screw rod mixes the material that defeated pump can only be carried specific gas liquid ratio, and powerless for the material that contains solid phase.We can be provided with the mud groove that receives silt by be provided with the muscle of scraping that strikes off silt on the tooth top of described female rotor on the tooth root of male rotor, realization contains the conveying of the material of solid phase.
Compared with prior art, because the utility model has been offered the automatic deloading hole on the pump housing, make this multiphase flow screw rod mix defeated pump high pressure in the caused compression chamber under the situation of high transfer rate and can in time, automatically finish off-load, realized being transferred gas content in the material at 0～100% o'clock high transfer rate, and effectively avoided the damage of screw rod, prolonged the working life of screw rod; Simultaneously, mud groove and the design of scraping muscle allow to contain certain solid phase in the material, have realized guaranteeing the conveying of the gas, liquid, solid multi-phase material under the high transfer rate situation.The utility model is simple in structure, and is practical, the transfer efficiency height.
Description of drawings
Fig. 1 is an embodiment's of the present utility model assembly structure sectional view;
Fig. 2 is the assembly structure sectional view of unloading hole among the embodiment of the present utility model, exhaust seat and air-breathing seat;
Fig. 3 is the schematic representation of intermeshing a pair of yin, yang rotor among the embodiment of the present utility model;
Fig. 4 is the schematic representation of compression chamber, suction chamber and discharge side during screw engages among the embodiment of the present utility model.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, active screw rod 1, driven screw rod 2, screw rod external diameter are D, spiro rod length is L, L=1.1D, initiatively the screw rod torsional angle is 300 °, is the four-head screw rod.Driven screw rod torsional angle is 200 °, is six screw rods.The velocity ratio of synchromesh gear 5 is 1: 1.5, forms fixing back lash when making the two screw rods engagement.The lubricant oil of the material of being carried and lubricated cooling bearing, gear, mechanical seal is separated in four mechanical seals 3.The axial force of being born on the equalizing piston 4 balance screw rods.Mechanical seal, bearing, synchromesh gear, the required lubricant oil of equalizing piston are supplied with by independent oil pump.Adopt the flow of this structure pump can be from 60m
3/ h～1800m
3/ h, outlet pressure can reach 2.5MPa, and suction pressure is from changing arbitrarily between 0.1MPa～1.0MPa.
As shown in Figure 2, this multiphase flow screw rod mixes air-breathing seat 6, the pump housing 7, the exhaust seat 9 of defeated pump, and the process parameter of the design consideration institute conveying material of relevant air inlet, relief opening designs by the design method of compressor.Inner pressure ratio can be from 1.5～7.As Fig. 2 and shown in Figure 4, automatic deloading mouth 8 is opened on the pump housing 7, and its design principle is to determine that the flow velocity of taking from moving unloading hole place in the present embodiment is seven times of designs of exit velocity according to the velocity ratio of flow velocity that pressure produced in the compression chamber and outlet; Unloading hole is communicated with compression chamber 16 and discharge side 14, and when the pressure in the compression chamber 16 during greater than discharge side 14 pressure, the materials in the compression chamber 16 can flow to discharge side 14 by automatic deloading hole 8, flow to the relief opening of exhaust seat 9.
Be illustrated in figure 3 as the profile of tooth of present embodiment screw rod, the engagement overlap coefficient of its yin, yang rotor is 1.6, can guarantee the carry-over moment that work is steady continuously and enough big like this.On the tooth top of female rotor, be provided with scrape silt scrape muscle 13, on the tooth root of male rotor, be provided with mud groove 12 conjugation with it.
This multiphase flow screw rod mixes when failing pump work, and material enters in the suction chamber 15 of the pump housing 7 from the inlet of air-breathing seat 6, enters the compression chamber 16 that the yin, yang rotor forms then, under the rotation of screw rod, move along the screw axis direction, be sent to discharge side, the outlet on exhaust seat 9 is discharged; Because the volume of compression chamber 16 is more and more littler, conveying along with screw rod, material pressure in the compression chamber 16 is increasing, when the pressure in the compression chamber 16 greater than discharge side 14 in during the pressure of material, material will enter discharge side 14 from the short circuit of automatic deloading hole, remains in the scope of rated pressure with the pressure that guarantees material in the compression chamber.Simultaneously, if contain solid particles such as silt in the material, because the tooth top of male rotor is provided with the mud groove 12 that receives silt, after solid materials such as silt are inhaled into, the muscle 13 of scraping through being located on the female rotor blows off again, so the existence of solid-phase material does not influence the use that this multiphase flow screw rod mixes defeated pump, thereby the high efficiency that has realized multi-phase material is carried.
Claims (4)
1, a kind of multiphase flow screw rod mixes defeated pump, comprise the pump housing, intermeshing active screw rod, driven screw rod, it is characterized in that: form airtight compression chamber between the yin, yang rotor of two screw rods that are meshing with each other, form suction chamber and discharge side between the screw rod and the pump housing respectively, the described pump housing is provided with the unloading hole that is communicated with compression chamber and discharge side.
2, multiphase flow screw rod according to claim 1 mixes defeated pump, it is characterized in that: the off-load flow velocity at described unloading hole place is 5～10 times that flow velocity is discharged in the discharge side outlet port.
3, multiphase flow screw rod according to claim 1 mixes defeated pump, it is characterized in that: the ingress of described suction chamber is provided with air-breathing seat, and the outlet port of described discharge side is provided with exhaust seat.
4, multiphase flow screw rod according to claim 1 mixes defeated pump, and it is characterized in that: the tooth top of described female rotor is provided with the muscle of scraping that strikes off silt, is provided with the mud groove conjugation with it of receiving silt on the tooth root of male rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720186203XU CN201144800Y (en) | 2007-12-20 | 2007-12-20 | Multiphase stream screw rod mixing delivery pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720186203XU CN201144800Y (en) | 2007-12-20 | 2007-12-20 | Multiphase stream screw rod mixing delivery pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201144800Y true CN201144800Y (en) | 2008-11-05 |
Family
ID=40081677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720186203XU Expired - Lifetime CN201144800Y (en) | 2007-12-20 | 2007-12-20 | Multiphase stream screw rod mixing delivery pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201144800Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459902A (en) * | 2009-04-30 | 2012-05-16 | 通用电气公司 | Method and apparatus for lubricating a screw pump system |
-
2007
- 2007-12-20 CN CNU200720186203XU patent/CN201144800Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459902A (en) * | 2009-04-30 | 2012-05-16 | 通用电气公司 | Method and apparatus for lubricating a screw pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO BAOSI COMPRESSOR CO., LTD. Free format text: FORMER OWNER: CHEN GANG Effective date: 20091113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091113 Address after: Zhejiang province Fenghua city streets Xiwu Shang road 18, zip code: 315500 Patentee after: Ningbo Baosi Compressor Co., Ltd. Address before: Zhejiang residents of the street west city of Fenghua province village mulberry Group No. 369, zip code: 315505 Patentee before: Chen Gang |
|
| C53 | Correction of patent for invention or patent application | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Gang Inventor after: Jia Anquan Inventor after: Fan Yonghai Inventor before: Chen Gang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: CHEN GANG TO: CHEN GANG JIA ANQUAN FAN YONGHAI |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 315500 Zhejiang province Fenghua city streets Xiwu Shang Qiao Road No. 18 Patentee after: Ningbo Baosi Energy Equipment Co., Ltd. Address before: 315500 Zhejiang province Fenghua city streets Xiwu Shang Qiao Road No. 18 Patentee before: Ningbo Baosi Compressor Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081105 |