CN218467825U - Bidirectional flexible coupling - Google Patents
Bidirectional flexible coupling Download PDFInfo
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- CN218467825U CN218467825U CN202222786854.XU CN202222786854U CN218467825U CN 218467825 U CN218467825 U CN 218467825U CN 202222786854 U CN202222786854 U CN 202222786854U CN 218467825 U CN218467825 U CN 218467825U
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- thrust bearing
- flexible shaft
- bearing
- screw pump
- coupling
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Abstract
The utility model relates to an oil recovery technology of latent oily charge pump is with regard to a shaft coupling, especially a two-way flexible shaft coupling, the characteristic is: at least comprises the following steps: the screw pump comprises a screw pump connecting section, a suction inlet, a coupling, a flexible shaft shell, a flexible shaft, a sand prevention ring, a bearing sleeve, a guide bearing, a bearing body, a thrust bearing, a lower connecting section and a lower coupling; one end of the suction inlet is connected with the screw pump connecting section, the other end of the suction inlet is connected with the flexible shaft shell at the joint of the suction inlet and the flexible shaft shell, and the axis of the flexible shaft shell is provided with a coupling. The method is used for improving the working conditions of the synchronous reluctance submersible motor protector and the screw pump, prolonging the service life of the synchronous reluctance submersible motor protector and the screw pump, and realizing the reverse injection of the submersible screw pump, wherein the reverse operation can be performed at a speed of +/-790and anticlockwise.
Description
Technical Field
The utility model relates to an oil submersible pump oil recovery technology, with regard to a shaft coupling, especially a two-way flexible coupling for improve synchronous magnetic resistance oily motor protector and the screw pump operating mode of diving, improve synchronous magnetic resistance oily motor protector and screw pump working life of diving. The reverse injection of the submersible screw pump can be realized at normal speed of 790% and reverse operation.
Background
In oil field development, an electric submersible pump is an important component of an artificial lifting process all the time, in recent years, the application of an oil submersible screw pump and a linear motor enables the oil submersible pump oil production process technology to be rapidly developed, and the oil submersible pump oil production process can gradually replace a ground oil pumping unit oil production process along with the continuous increase of the number of inclined wells.
In the prior art, crude oil in a well is often conveyed upwards through an electric submersible pump, the installation position of the electric submersible pump is 1000 meters deep in the well, the electric submersible pump supplies power to an underground motor through a cable, the currently adopted method is to connect the cable and the electric submersible pump on the ground, then the cable is bound on the outer wall of an oil pipe one by one, and the electric submersible pump and the cable are put into the well along with the oil pipe.
The synchronous reluctance submersible motor is an important technology for upward oil transportation of the submersible electric pump, and comprises a protector and a screw pump for protecting the submersible electric motor.
After years of application and improvement, the synchronous reluctance submersible motor forms a complete set of mature synchronous reluctance submersible motor protector and screw pump well model selection, design and matching scheme, and can meet the development requirements of the existing oil well.
The following problems exist in the production:
1) The motor insulation reduction and the broken shaft shutdown frequently occur, the thrust bearing is damaged, the yield loss is large, and the development economic benefit is reduced.
2) The production and operation life of the protector of the synchronous reluctance submersible motor and the screw pump is shortened.
The following problems exist in the production:
3) Insulation reduction of the motor and the screw pump and shaft breakage and shutdown frequently occur, so that the yield loss is large, and the development economic benefit is reduced;
4) The production and operation life of the protector of the synchronous reluctance submersible motor and the screw pump is reduced, and the average pump detection period is only 200 days.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can overcome frequently the motor insulation that appears and reduce and shut down with disconnected axle, the two-way flexible shaft coupling of thrust bearing damage.
The utility model discloses the purpose is realized like this, a two-way flexible shaft coupling, characterized by: at least comprises the following steps: the screw pump comprises a screw pump connecting section (1), a suction inlet (2), a coupler (3), a flexible shaft shell (4), a flexible shaft (5), a sand-proof ring (6), a bearing sleeve (7), a guide bearing (8), a bearing body (9), a thrust bearing (11), a lower connecting section (14) and a lower coupler (15); one end of the suction inlet (2) is connected with the screw pump connecting section (1), the other end of the suction inlet is connected with the flexible shaft shell (4) at the joint of the suction inlet (2) and the flexible shaft shell (4), and the shaft center of the flexible shaft shell (4) is provided with a shaft coupling (3); one end of the coupling (3) is connected with a shaft extending to the screw pump connecting section (1), and the other end is connected with a flexible shaft (5); the sand-proof ring (6), the bearing sleeve (7), the guide bearing (8), the bearing body (9) and the thrust bearing (11) are connected in sequence rightwards through the flexible shaft (5); the flexible shaft shell (4) is connected with a lower connecting section (14) and a lower coupler (15) through a bearing body (9), and is connected with the synchronous reluctance submersible motor through the lower coupler (15).
And a synchronous reluctance submersible motor protector is arranged between the lower coupling (15) and the synchronous reluctance submersible motor.
The thrust bearing (11) comprises: the flexible shaft bearing comprises a thrust bearing gland (16), a thrust bearing moving block (12) and a thrust bearing base (10), wherein the thrust bearing gland (16), the thrust bearing moving block (12) and the thrust bearing base (10) are sequentially sleeved on the flexible shaft (5) from top to bottom, and the thrust bearing gland (16) covers a boss at the top of the thrust bearing moving block (12) and is connected up and down through screws; the side of the thrust bearing moving block (12) is provided with a fastening hole, a jackscrew fastens the thrust bearing moving block (12) and the flexible shaft (5) through the fastening hole, the thrust bearing (11) is fixed on the thrust bearing base (10), the thrust bearing base (10) is provided with a pin shaft (17) parallel to the flexible shaft (5), and the pin shaft (17) penetrates through the thrust bearing base (10).
The lower end of the thrust bearing gland (16) close to the flexible shaft (5) is provided with two half rings (13), the two half rings (13) are sleeved on the outer arm of the flexible shaft (5), and the two half rings (13) are embedded into an inner groove of the thrust bearing gland (16) close to the flexible shaft (5).
The flexible shaft (5) is made of TC4 titanium alloy.
The guide bearing (8) adopts a hard alloy lubrication bearing pair.
The utility model has the advantages that: the bidirectional flexible coupling is additionally arranged between the synchronous reluctance submersible motor protector and the screw pump, and the deviation angle required by the movement of the screw pump rotor is effectively solved by utilizing the characteristics of a TC4 titanium alloy shaft; when the screw pump reversely injects, the thrust bearing component is installed, so that the special flexible coupling can bear the upward axial force generated when the rotor of the screw pump reversely rotates, and the corrosion resistance in well liquid is good. The structure successfully improves the working conditions of the protector and the screw pump of the synchronous reluctance submersible motor, improves the bearing capacity and the reliability and realizes bidirectional operation; the guide bearing adopts a hard alloy lubrication bearing pair, is wear-resistant and high in strength, improves the stability of the system, has good corrosion resistance in well fluid, and improves the stability of the system; the bidirectional thrust flexible coupling is additionally provided with a load buffering component, so that impact load generated when a screw pump rotor operates is absorbed, the service life of a thrust bearing group is prolonged, and the service life of the whole system is further prolonged.
Drawings
The present invention will be further explained with reference to the following embodiments and accompanying drawings:
FIG. 1 is a schematic structural diagram of the left section of the embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the right section of the embodiment of the present invention;
fig. 3 is a schematic view of a thrust bearing structure.
In the figure, 1, a screw pump connecting section; 2. a suction inlet; 3. a coupling; 4. a flexible shaft housing; 5. a flexible shaft; 6. a sand prevention ring; 7. a bearing housing; 8. a guide bearing; 9. a bearing body; 10. A thrust bearing base; 11. a thrust bearing; 12. a thrust bearing moving block; 13. two semi-rings; 14. a lower coupling section; 15. a lower coupling; 16. a thrust bearing gland; 17. and a pin 17.
Detailed Description
As shown in fig. 1 and 2, fig. 1 and 2 are schematic diagrams of left and right end parts of a bidirectional flexible coupling structure, and the left and right end parts are connected together to form an integral diagram.
The bi-directional flexible coupling comprises: the screw pump comprises a screw pump connecting section 1, a suction inlet 2, a coupler 3, a flexible shaft shell 4, a flexible shaft 5, a sand prevention ring 6, a bearing sleeve 7, a guide bearing 8, a bearing body 9, a thrust bearing 11, a lower connecting section 14 and a lower coupler 15; one end of the suction inlet 2 is connected with the screw pump connecting section 1, the other end of the suction inlet is connected with the flexible shaft shell 4, and a shaft coupling 3 is arranged at the connecting part of the suction inlet 2 and the flexible shaft shell 4 at the axis of the flexible shaft shell 4; one end of the coupling 3 is connected with a shaft extending to the screw pump connecting section 1, and the other end is connected with a flexible shaft 5; the sand-proof ring 6, the bearing sleeve 7, the guide bearing 8, the bearing body 9 and the thrust bearing 11 are connected in sequence rightwards through the flexible shaft 5; the flexible shaft shell 4 is connected with a lower connecting section 14 and a lower coupler 15 through a bearing body 9, and is connected with the synchronous reluctance submersible motor through the lower coupler 15. A synchronous reluctance submersible motor protector is arranged between the lower coupler 15 and the synchronous reluctance submersible motor.
As shown in fig. 3, a structural view of the thrust bearing 11 is given, which includes: the thrust bearing cover 16, the thrust bearing moving block 12 and the thrust bearing base 10 are sequentially sleeved on the flexible shaft 5 from top to bottom, wherein the thrust bearing cover 16 covers a boss at the top of the thrust bearing moving block 12 and is connected up and down through a screw; the side of the thrust bearing moving block 12 is provided with a fastening hole, a jackscrew fastens the thrust bearing moving block 12 and the flexible shaft 5 through the fastening hole, the thrust bearing 11 is fixed on the thrust bearing base 10, the thrust bearing base 10 is provided with a pin shaft 17 parallel to the flexible shaft 5, and the pin shaft 17 penetrates through the thrust bearing base 10.
The thrust bearing gland 16 is provided with two half rings 13 close to the lower end of the flexible shaft 5, the two half rings 13 are sleeved on the outer arm of the flexible shaft 5, and the two half rings 13 are embedded in the inner groove of the thrust bearing gland 16 close to the flexible shaft 5.
As shown in fig. 1, 2 and 3, a bidirectional flexible coupling is additionally arranged between the synchronous reluctance submersible motor protector and the screw pump, and the bidirectional flexible coupling adopts the TC4 titanium alloy shaft characteristic, so that the deflection angle required by the movement of the rotor of the screw pump can be effectively solved; when the screw pump reversely injects, the thrust bearing component is installed, so that the bidirectional flexible coupling can bear the upward axial force generated when the rotor of the screw pump reversely rotates, and the corrosion resistance in well liquid is good. The structure successfully improves the working conditions of the protector of the synchronous reluctance submersible motor and the screw pump, and effectively solves the deflection angle required by the movement of the rotor of the screw pump; when the screw pump reversely injects, the thrust bearing component is installed, so that the special flexible coupling can bear the upward axial force generated when the rotor of the screw pump reversely rotates, the bearing capacity and the reliability are improved, and the bidirectional operation is realized.
The guide bearing 8 adopts a hard alloy lubrication bearing pair, is wear-resistant and high in strength, improves the stability of the system, has good corrosion resistance in well fluid, and improves the stability of the system; the bidirectional thrust flexible coupling is additionally provided with a load buffer part, so that impact load generated when a screw pump rotor operates is absorbed, the service life of a thrust bearing group is prolonged, and the service life of the whole system is further prolonged.
When the screw pump reversely injects, the thrust bearing component is installed while the upward axial force is effectively transmitted, so that the flexible coupling can bear the upward axial force generated when the rotor of the screw pump reversely rotates, and the bidirectional flexible coupling has the characteristic of good corrosion resistance in well fluid.
The components and structures of the present embodiments that are not described in detail are known in the art and are not described in detail herein.
Claims (6)
1. A bidirectional flexible coupling is characterized in that: at least comprises the following steps: the screw pump comprises a screw pump connecting section (1), a suction inlet (2), a coupler (3), a flexible shaft shell (4), a flexible shaft (5), a sand-proof ring (6), a bearing sleeve (7), a guide bearing (8), a bearing body (9), a thrust bearing (11), a lower connecting section (14) and a lower coupler (15); one end of the suction inlet (2) is connected with the screw pump connecting section (1), the other end of the suction inlet is connected with the flexible shaft shell (4) at the joint of the suction inlet (2) and the flexible shaft shell (4), and the shaft center of the flexible shaft shell (4) is provided with a shaft coupling (3); one end of the coupling (3) is connected with a shaft extending to the screw pump connecting section (1), and the other end is connected with a flexible shaft (5); the sand-proof ring (6), the bearing sleeve (7), the guide bearing (8), the bearing body (9) and the thrust bearing (11) are connected in sequence rightwards through the flexible shaft (5); the flexible shaft shell (4) is connected with a lower connecting section (14) and a lower coupler (15) through a bearing body (9), and is connected with the synchronous reluctance submersible motor through the lower coupler (15).
2. A bi-directional flexible coupling as set forth in claim 1 wherein: and a synchronous reluctance submersible motor protector is arranged between the lower coupler (15) and the synchronous reluctance submersible motor.
3. A bi-directional flexible coupling as set forth in claim 1 wherein: the thrust bearing (11) comprises: the thrust bearing cover (16), the thrust bearing moving block (12) and the thrust bearing base (10) are sequentially sleeved on the flexible shaft (5) from top to bottom, wherein the thrust bearing cover (16) covers a boss at the top of the thrust bearing moving block (12) and is connected up and down through screws; the side of the thrust bearing moving block (12) is provided with a fastening hole, a jackscrew fastens the thrust bearing moving block (12) and the flexible shaft (5) through the fastening hole, the thrust bearing (11) is fixed on the thrust bearing base (10), the thrust bearing base (10) is provided with a pin shaft (17) parallel to the flexible shaft (5), and the pin shaft (17) penetrates through the thrust bearing base (10).
4. A bi-directional flexible coupling as set forth in claim 3 wherein: the lower end of the thrust bearing gland (16) close to the flexible shaft (5) is provided with two half rings (13), the two half rings (13) are sleeved on the outer arm of the flexible shaft (5), and the two half rings (13) are embedded into an inner groove of the thrust bearing gland (16) close to the flexible shaft (5).
5. A bi-directional flexible coupling as set forth in claim 1 wherein: the flexible shaft (5) is made of TC4 titanium alloy.
6. A bi-directional flexible coupling as set forth in claim 1 wherein: the guide bearing (8) adopts a hard alloy lubrication bearing pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222786854.XU CN218467825U (en) | 2022-10-23 | 2022-10-23 | Bidirectional flexible coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222786854.XU CN218467825U (en) | 2022-10-23 | 2022-10-23 | Bidirectional flexible coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218467825U true CN218467825U (en) | 2023-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222786854.XU Active CN218467825U (en) | 2022-10-23 | 2022-10-23 | Bidirectional flexible coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218467825U (en) |
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2022
- 2022-10-23 CN CN202222786854.XU patent/CN218467825U/en active Active
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