CN2821226Y - Pressure balance device of electric submersible screw pump - Google Patents
Pressure balance device of electric submersible screw pump Download PDFInfo
- Publication number
- CN2821226Y CN2821226Y CN 200620020459 CN200620020459U CN2821226Y CN 2821226 Y CN2821226 Y CN 2821226Y CN 200620020459 CN200620020459 CN 200620020459 CN 200620020459 U CN200620020459 U CN 200620020459U CN 2821226 Y CN2821226 Y CN 2821226Y
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- CN
- China
- Prior art keywords
- equilibrium block
- electric submersible
- screw pump
- submersible screw
- pump
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- 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.)
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Abstract
The utility model discloses a pressure balance device of electric submersible screw pump. The adopted technical scheme is that a balancing sleeve, a counterbalance and an elastic link rod are extended at the dubbing output end of an electric submersible screw pump. The beneficial effect is that when the pump is working, the output oil pressure respectively acts on the dubbing output end face of a rotor and the lower end face of the counterbalance. Due to the fact that the oil pressures of the two end faces have equal sizes and opposite directions, the balanced counteract of the axial force on the rotor of the electric submersible screw pump is implemented and the equilibrium relationship does not alter with the change of the output pressure of the pump. The design of the utility model is also suitable for water injection pumps.
Description
Affiliated technical field
The utility model relates to the pressure equaliser on a kind of electric submersible screw pump.
Background technique
At present, known electric submersible screw pump is rotor relative to doing planetary the rotation with the stator of its conjugation engagement, and mechanical energy is converted into the hydraulic pressure energy, in the down-hole fluid is lifted to ground.Because the oil pressure of pump discharge to the rotor aspectant effect in upper end, points to the axial force that fluid enters the mouth thereby rotor is produced one.In order to realize subsurface progressive cavity energy safety, to recover the oil reliably, above-mentioned axial force must be solved in the system design of pump.Conventional solution is for to set up thrust bearing in the bottom of rotor.But practice operation confirms the repair cycle of the working life of thrust bearing far below the screw pump industry standard, causes electric submersible screw pump to be restricted in the application of recovering the oil.In addition, existing water injection pump has same problem too.
Summary of the invention
In order to overcome the above-mentioned axial force that existing electric submersible screw pump produces in oil producing operation, the utility model provides the pressure equaliser on a kind of electric submersible screw pump, in order to offset above-mentioned axial force.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: set up a balance set, equilibrium block and elasticity link rod at the fluid output terminal of electric submersible screw pump.Described balance set profile is the cylindrical body close with the electric submersible screw pump stator diameter, and its bottom is connected with the output terminal of electric submersible pump is fixed or movable.Its internal upper part of this balance set is a vertebra shape drain pipe, the bottom is the equilibrium block fitting seat, the peripheral annular of this equilibrium block fitting seat is arranged with the infusion channel of being led to drain pipe by pump chamber, the bottom has a columniform equilibrium block mounting groove, this equilibrium block mounting groove and form the slit gap revolute pair with its equilibrium block with shape.Have on the top of equilibrium block to be provided with an oil pressure chamber that is opened on the balance set outer wall, the bottom surface in this oil pressure chamber is the upper-end surface of equilibrium block.Elasticity link rod one end is fixed on the equilibrium block, and the other end is fixed on the fluid output terminal of electric submersible screw pump rotor.The lower end surface of equilibrium block equates with the fluid output terminal end face diameter of electric submersible screw pump rotor.
Above-mentioned oil pressure chamber can be located on the equilibrium block, and promptly the upper end of equilibrium block is the rim of a cup shape, also can be located on the equilibrium block fitting seat, and a columniform cavity is promptly arranged on the equilibrium block fitting seat above the equilibrium block.
The working principle of above-mentioned design is: establishing the outer fluid pressure of pump is P
0, pump output fluid pressure is P, equilibrium block lower end surface area is S
C, the fluid output end face area of rotor is S
D, the suffered vertically hydraulic resultant force of equilibrium block is F
C, the suffered vertically hydraulic resultant force of rotor is F
D, then
F
C==S
C* (P-P
0) direction upwards
F
D==S
D* (P-P
0) be directed downwards
During design, make S
C==S
DThe suffered vertically hydraulic resultant force of parts that is made of equilibrium block, elasticity link rod and rotor is F like this
C-F
D==0, promptly the suffered vertically hydraulic resultant force of rotor is offset by complete equilibrium.
The beneficial effects of the utility model are that pump is when work, output oil pressure acts on respectively on the lower end surface of the fluid output terminal end face of rotor and equilibrium block, because the oil pressure equal and opposite in direction of two end faces, direction is opposite, thereby realized balance of axial force on the electric submersible screw pump rotor is offset, and this equilibrium relation does not change with the variation of the delivery pressure of pump.Design of the present utility model is applicable to water injection pump too.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in detail
Fig. 1 is the utility model embodiment 1 a structural representation
Fig. 2 is the A-A face sectional drawing of Fig. 1
Fig. 3 is the utility model embodiment 2 a structural representation
Embodiment
Example 1
As shown in Figure 1, set up a balance set 1, equilibrium block 2 and elasticity link rod 3 at the fluid output terminal of electric submersible screw pump.The profile of described balance set 1 is and the close cylindrical body of electric submersible screw pump stator 4 diameters that its bottom is connected with the output terminal of electric submersible pump is fixed or movable.Top in this balance set 1 is vertebra shape drain pipe 5, the bottom is an equilibrium block fitting seat 11, the peripheral annular of this equilibrium block fitting seat 11 is arranged with the infusion channel 6 of being led to drain pipe by pump chamber, the bottom has a columniform equilibrium block mounting groove 7, this equilibrium block mounting groove 7 and form the slit gap revolute pairs with its equilibrium block 2 with shape.Be provided with a feed pathway 8 that is opened on the outer wall of balance set in the bottom of equilibrium block mounting groove, oil pressure chamber 9 is the upper end that equilibrium block 2 is the rim of a cup shape, and it is communicated with feed pathway 8.The lower end surface of equilibrium block equates with the fluid output terminal end face diameter of electric submersible screw pump rotor.Elastic link 3 one ends are fixed on the equilibrium block 2, and the other end is fixed on the fluid output terminal 10 of electric submersible screw pump rotor.
Example 2
As shown in Figure 3, described oil pressure chamber 9 is the columniform cavity on equilibrium block fitting seat 11 above the equilibrium block 2.
Claims (3)
1, the pressure equaliser on a kind of electric submersible screw pump is characterized in that: set up a balance set (1), equilibrium block (2) and elasticity link rod (3) at the fluid output terminal of electric submersible screw pump; Described balance set (1) profile is and the close cylindrical body of electric submersible screw pump stator (4) diameter that its bottom is connected with the output terminal of electric submersible pump is fixed or movable; Its internal upper part of this balance set (1) is a vertebra shape drain pipe (5), the bottom is equilibrium block fitting seat (11), the peripheral annular of this equilibrium block fitting seat (11) is arranged with the infusion channel (8) of being led to drain pipe by pump chamber, the bottom has a columniform equilibrium block mounting groove (7), this equilibrium block mounting groove (7) and form the slit gap revolute pair with its equilibrium block with shape (2); Have on the top of equilibrium block (2) to be provided with an oil pressure chamber (9) that is opened on the balance set outer wall, the bottom surface in this oil pressure chamber (9) is the upper-end surface of equilibrium block (2); Elasticity link rod (3) one ends are fixed on the equilibrium block (2), and the other end is fixed on the fluid output terminal (10) of electric submersible screw pump rotor; The lower end surface of equilibrium block (2) equates with fluid output terminal (10) end face diameter of electric submersible screw pump rotor.
2, the pressure equaliser on a kind of electric submersible screw pump according to claim 1 is characterized in that: described oil pressure chamber (9) is located on the equilibrium block (2), and promptly the upper end of equilibrium block (2) is the rim of a cup shape.
3, the pressure equaliser on a kind of electric submersible screw pump according to claim 1, it is characterized in that: described oil pressure chamber (9) is located on the equilibrium block fitting seat (11), promptly on the equilibrium block fitting seat (11) of equilibrium block (2) top a columniform cavity is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620020459 CN2821226Y (en) | 2006-03-27 | 2006-03-27 | Pressure balance device of electric submersible screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620020459 CN2821226Y (en) | 2006-03-27 | 2006-03-27 | Pressure balance device of electric submersible screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2821226Y true CN2821226Y (en) | 2006-09-27 |
Family
ID=37017780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620020459 Expired - Fee Related CN2821226Y (en) | 2006-03-27 | 2006-03-27 | Pressure balance device of electric submersible screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2821226Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309464A (en) * | 2021-07-28 | 2021-08-27 | 江苏南通冠仟新型建材科技有限公司 | Oil pressure balancing device for diving equipment and use method thereof |
-
2006
- 2006-03-27 CN CN 200620020459 patent/CN2821226Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309464A (en) * | 2021-07-28 | 2021-08-27 | 江苏南通冠仟新型建材科技有限公司 | Oil pressure balancing device for diving equipment and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |