CN201173194Y - Multiple tandem double-screw pump - Google Patents
Multiple tandem double-screw pump Download PDFInfo
- Publication number
- CN201173194Y CN201173194Y CNU2008200190487U CN200820019048U CN201173194Y CN 201173194 Y CN201173194 Y CN 201173194Y CN U2008200190487 U CNU2008200190487 U CN U2008200190487U CN 200820019048 U CN200820019048 U CN 200820019048U CN 201173194 Y CN201173194 Y CN 201173194Y
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- pump
- pumps
- rotor
- screw
- rotor shaft
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- Expired - Fee Related
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Abstract
The utility model discloses a twin-screw pump in which a plurality pumps can be connected in series. The twin-screw pump comprises at least three pumps connected in series, wherein, each pump comprises a twin-screw rotor; a bearing and a bearing seat are arranged on a rotor shaft at the two ends of the spiral sleeve of the twin-screw rotor; a stator is fixedly sleeved on the bearing seat; outer casings are sleeved outside the stator and the rotor; connecting joints are arranged at the end parts of the outer casings of the adjacent pumps; the two ends of the rotor shaft extend out of the connecting joints; the outer part of the rotor shaft is connected by the connecting joints of two pumps, and the inner part of the rotor shaft is connected by the rotor shafts of the two pumps. The twin-screw pump has the advantages that a connection mode that a plurality of pumps are connected in series is used, the length and the volume of each pump are reduced, and the structure of each independent pump body is simplified, simultaneously, the processing difficulty is also reduced, the pump processing and installation precision is ensured, and the installation and the disassembly are convenient. The number of the pumps can be increased and decreased according to different lift requirements, the pumps of identical type can be applied into wells with different depth, and the oil extraction cost is reduced.
Description
Technical field
The utility model relates to a kind of oil extraction pump.
Background technique
Two screw pump is a kind of positive displacement pump, and its working principle is: two rotors of pump intermesh in stator, and a helical pitch of rotor forms a chamber, along with the increase of chamber, and the increase of rotor helical pitch just, the work lift of pump also can increase.
When two screw pump is used as the electrical submersible oil extraction pump, require the work lift of pump higher, this just requires the helical pitch of rotor to want many.Yet owing to be subjected to the restriction of borehole size, it is very big that the radial dimension of electrical submersible twin-screw oil extraction pump can not be done, and two rotor diameters also just are subjected to certain limitation.In order to improve lift, must increase the helical pitch of rotor, and the helical pitch increase will make the length of rotor increase, and so just makes rotor become a kind of elongate rod structure.This slim-lined construction not only processing and manufacturing difficulty is big, and installs and adjust difficulty.What is more important, since between rotor and the rotor and the matching gap between rotor and the stator smaller, the radial force that rotor is subjected to during work makes the rotor bow distortion, easily come in contact friction between rotor and rotor, rotor and the stator, reduce the working life of pump, even can stuck rotor be scrapped by pump.
The model utility content
Technical problem to be solved in the utility model provide a kind of simple in structure, reliable operation, easy installation and removal can a plurality of series connection two screw pump.
In order to address the above problem, the utility model is taked following technological scheme:
A kind of two screw pump that can a plurality of series connection, comprise at least three pumps that are connected in series, each pump comprises twin-screw rotor, on the rotor shaft at twin-screw rotor screw-casing two ends bearing and bearing support are installed, fixed cover is set son on the bearing support, and stator and rotor are arranged with shell outward, the end of the shell of adjacent pump is provided with connecting head, stretch out from connecting head at the rotor shaft two ends, and the outside is that the connecting head of two pumps connects, and inside is that the rotor shaft of two pumps connects.
The outer wall of described connecting head has been attacked screw thread, and two connecting heads company's level cover by internal thread outside of realizing pump that links together connects.
The external diameter of described connecting head and the internal diameter of shell are adaptive, connect first end and are inserted into and are connected with outer casing inner wall in the shell, and be provided with Sealing in the joint.
The rotor shaft end of described two pumps links together by spline housing or connector, realizes that the inside of pump connects.
The beneficial effects of the utility model are: the utility model uses a plurality of series connection of pumps ways of connecting, the length and the volume of each pump have reduced, and each independent pump body structure is oversimplified, and have also reduced difficulty of processing simultaneously, guarantee the processing and the installation precision of pump, made things convenient for installation and removal.Can the pump with a kind of model be can be applicable in the well of different well depths according to the number of different lift needs increase and decrease pumps, reduce cost for oil production.
Description of drawings
Fig. 1 is the long splice composition of two pumps.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
A kind of two screw pump that can a plurality of series connection, comprise a plurality of pumps that are connected in series, with reference to Fig. 1, it is the long splice composition of two pumps, as shown in the frame of Fig. 1 left half, it is an independent pump, as figure shows, each pump comprises shell 1, in the shell 1 twin-screw rotor is arranged, twin-screw rotor comprises the screw-casing 3 on rotor shaft 2 and the rotor shaft 2, the screw-casing engagement of two screw rods realizes the transmission of medium to be transmitted, on the rotor shaft 2 at screw-casing 3 two ends, be with bearing 4, bearing support 5 is arranged outward, be fixed with stator 6 on the bearing support 5, shell 1 two ends do not have the end, the end of the shell 1 of the pump that connects is connected with connecting head 7, connecting head 7 does not have the end for two ends yet, the internal diameter of the external diameter of connecting head 7 and shell 1 is adaptive, connecting head 7 one ends are inserted in the shell 1, are connected by screw buckle locking with shell 1, in order to reach better sealing effect, prevent the medium that transmits, the utility model is that example describes with the oil recovery, for preventing that oil from leaking outside, also is provided with Sealing between connecting head 7 and the shell 1 so, as seal washer 8, the two ends of connecting head 7 all do not have the end yet, and stretch out to both sides from connecting head 8 at rotor shaft 2 two ends, and the rotor shaft 2 that stretches out can be realized the connection of a plurality of pumps, a unconnected end is in order to connect miscellaneous part, with the allomeric function of common realization oil extraction pump.
Attacked screw thread on one end of shell 1 (in order to an end of a plurality of connections) wall, the connecting sleeve 9 of an interior tapping connects two connecting heads 7, thereby realizes the connection of shell, connects by spline housing 10 between the rotor shaft 2 of each pump, realizes inner connection.
Certainly, can also connect in other way between above-mentioned shell 1 and the shell.Can also connect by connector between the rotor shaft 2, so long as can realize that the axle ways of connecting is all in protection domain of the present utility model.
When connecting second pump, the connecting head 7 of first shell 1 and the connecting head 7 of second pump are connected, connect by spline housing 10 between the inner rotor shaft 2 with connecting sleeve 9.And the like, can realize the connection between a plurality of pumps.
The utility model uses a plurality of series connection of pumps ways of connecting, and the length and the volume of each pump have reduced, and each independent pump body structure is oversimplified, and has also reduced difficulty of processing simultaneously, has guaranteed the processing and the installation precision of pump, has made things convenient for installation and removal.Can the pump with a kind of model be can be applicable in the well of different well depths according to the number of different lift needs increase and decrease pumps, reduce cost for oil production.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1, a kind of two screw pump that can a plurality of series connection, it is characterized in that, comprise at least three pumps that are connected in series, each pump comprises twin-screw rotor, on the rotor shaft at twin-screw rotor screw-casing two ends bearing and bearing support is installed, fixed cover is set son on the bearing support, stator and rotor are arranged with shell outward, and the end of the shell of adjacent pump is provided with connecting head, and stretch out from connecting head at the rotor shaft two ends, the outside is that the connecting head of two pumps connects, and inside is that the rotor shaft of two pumps connects.
2, two screw pump that can a plurality of series connection according to claim 1 is characterized in that the outer wall of described connecting head has been attacked screw thread, and two connecting heads company's level cover by internal thread outside of realizing pump that links together connects.
3, two screw pump that can a plurality of series connection according to claim 2 is characterized in that the external diameter of described connecting head and the internal diameter of shell are adaptive, connects first end and is inserted in the shell and is connected with outer casing inner wall, and be provided with Sealing in the joint.
4, two screw pump that can a plurality of series connection according to claim 1 is characterized in that the rotor shaft end of described two pumps links together by spline housing or connector, realizes that the inside of pump connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200190487U CN201173194Y (en) | 2008-03-19 | 2008-03-19 | Multiple tandem double-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200190487U CN201173194Y (en) | 2008-03-19 | 2008-03-19 | Multiple tandem double-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173194Y true CN201173194Y (en) | 2008-12-31 |
Family
ID=40200313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200190487U Expired - Fee Related CN201173194Y (en) | 2008-03-19 | 2008-03-19 | Multiple tandem double-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173194Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929479A (en) * | 2009-06-24 | 2010-12-29 | 边疆 | Method for removing pump pipe differential pressure with high adaptivity |
-
2008
- 2008-03-19 CN CNU2008200190487U patent/CN201173194Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929479A (en) * | 2009-06-24 | 2010-12-29 | 边疆 | Method for removing pump pipe differential pressure with high adaptivity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20130319 |