CN216842234U

CN216842234U - Pump body for electric submersible pump assembly

Info

Publication number: CN216842234U
Application number: CN202123256535.XU
Authority: CN
Inventors: 赵玉东; 王雅然; 王向红; 苏翼; 马伟
Original assignee: TIANJIN VICTORY OILFIELD EQUIPMENT MANUFACTURING CO LTD
Current assignee: TIANJIN VICTORY OILFIELD EQUIPMENT MANUFACTURING CO LTD
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-06-28
Anticipated expiration: 2031-12-22

Abstract

The utility model provides a pump body for an electric submersible pump assembly, which comprises an upper transportation cap, a pump body and a transportation cap, wherein the upper transportation cap is connected with the pump body through a bolt, and the transportation cap is connected with the pump body through a bolt; the pump body comprises a plurality of impeller guide shell assemblies, a pump shaft, an upper pump head assembly, a lower pump head assembly and a pump shell; the impeller guide shell component comprises an impeller and a guide shell, and the impeller and the guide shell are sequentially connected on the pump shaft in series; the upper pump head assembly component and the lower pump head assembly component are respectively and fixedly arranged at two ends of the pump shell, and a locking ring and a compression ring for locking the pump shell and the guide shell are sequentially arranged between the pump shell and the guide shell; the pump shaft is provided with a spacer sleeve, the upper end of the pump shaft is provided with a locking assembly capable of locking the spacer sleeve, and the locking assembly can be adjusted in the upper pump head assembly. A pump body for diving oily charge pump subassembly, this oil-submersible pump compact structure, in same space, efficiency is higher.

Description

Pump body for submersible electric pump assembly

Technical Field

The utility model belongs to the oil-submersible pump field especially relates to a pump body for diving oily charge pump subassembly.

Background

With the continuous development of the petroleum industry, the electric submersible pump unit is widely applied to oil field oil extraction production due to high efficiency and stability, and is limited by space conditions in underground operation, the electric submersible pump is mostly of a long and thin structure, namely, a long shaft penetrates through a multi-stage blade guide wheel, and a pair of sliding bearings are respectively arranged at two ends of the shaft to serve as radial supports.

In the prior art, the sand-proof submersible pump has short service life, easy occurrence of problems and low sand-proof and corrosion-resistant capabilities.

Disclosure of Invention

In view of this, the utility model aims at providing a pump body for diving oily charge pump subassembly to solve that life is short, the problem appears easily, sand control corrosion resistance is low problem.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a pump body for an electric submersible pump assembly comprises an upper transportation cap, a pump body and a transportation cap, wherein the upper transportation cap is connected with the pump body through a bolt;

the pump body comprises a plurality of impeller guide shell assemblies, a pump shaft, an upper pump head assembly, a lower pump head assembly and a pump shell; the impeller guide shell component comprises an impeller and a guide shell, and the impeller and the guide shell are sequentially connected on the pump shaft in series; the upper pump head assembly component and the lower pump head assembly component are respectively and fixedly arranged at two ends of the pump shell;

a locking ring and a compression ring for locking the pump shell and the guide shell are sequentially arranged between the pump shell and the guide shell;

the pump shaft is provided with a spacer sleeve, the upper end of the pump shaft is provided with a locking assembly capable of locking the spacer sleeve, and the locking assembly can be adjusted in the upper pump head assembly.

The locking assembly comprises a locking nut, a locking sleeve and a taper nail, the locking nut and the locking sleeve are connected by a split ring at the lower end of the upper bearing sleeve to enable the impeller and the shaft to be relatively fixed and locked, and the taper nail for preventing the locking nut and the locking sleeve from loosening is arranged on the locking nut. The isolating sleeve is locked through the locking nut and the locking sleeve, the impeller is locked through the isolating sleeve, the upper pump head is opened, and the position of the impeller can be adjusted by controlling the locking nut.

Furthermore, the both ends of pump shaft are equipped with the involute spline, are located the bottom involute spline of pump shaft and are equipped with the spline housing assembly body.

Furthermore, the upper end and the lower end of the pump shaft are respectively provided with an upper bearing sleeve and a lower bearing sleeve; the impeller, the guide shell and the sand prevention structure assembly are sequentially connected in series between the upper bearing sleeve and the lower bearing sleeve.

The upper end of the upper bearing sleeve and the lower end of the lower bearing sleeve are respectively provided with a check ring fixedly connected with the pump shaft; the lower end of the upper bearing sleeve and the upper end of the lower bearing sleeve are respectively provided with a split ring for fixing the impeller, the short-handle impeller, the bearing sleeve and the bearing-level isolation sleeve, and the fixed impeller, the short-handle impeller, the bearing sleeve and the bearing-level isolation sleeve are locked by a locking nut and a locking sleeve.

The upper pump head assembly comprises an upper pump head, a first bearing support frame and a first bearing bush, the upper pump head is fixedly welded with a pump shell through a locking plate, the first bearing bush is arranged in the first bearing support frame, a pump shell gasket is arranged between the upper pump head and the pump shell and used for adjusting the extension size of an upper shaft, a sealing groove is formed in the tail of the upper pump head, and a first O-shaped rubber sealing ring is arranged in the sealing groove; the pump shell and the guide shell compress the guide shell through the locking ring; and a compression ring is arranged between the locking ring and the guide shell.

The lower pump head assembly component comprises a lower pump head, a second bearing support frame and a second bearing bush, the second bearing bush is arranged in the second bearing support frame, the lower pump head is fixed with the pump shell through a locking plate in a welding mode, a sealing groove is formed in the thread tail portion of the lower pump head, a second O-shaped rubber sealing ring is arranged in the sealing groove, a positioning ring used for fixing the bottom guide shell and the bottom guide shell used for fixing the impeller are sequentially arranged between the lower pump head assembly component and the impeller, and a bottom guide shell gasket is arranged between the bottom guide shell positioning ring and the bottom guide shell and used for adjusting the size of the lower shaft extension. The upper pump head and the lower pump head are respectively fixedly connected with the bearing support frame and the bearing bush;

furthermore, an isolation sleeve is arranged between the impeller guide shells, and the axially-matched isolation sleeve is filled in an axial gap and is installed in the pump shaft.

Furthermore, a sand prevention bearing assembly is arranged between the impeller guide shells and comprises a short impeller, a bearing-grade guide shell assembly, a bearing sleeve and a bearing-grade isolation sleeve, and the impeller, the guide shell, the short impeller, the bearing sleeve, the bearing-grade guide shell assembly and the bearing-grade isolation sleeve are sequentially connected on the pump shaft in series. The length of the hub of the short impeller is shorter than that of the hub of the fixed impeller, and the short impeller is spaced every two times according to the requirement of actual use conditions

Each impeller guide shell is provided with a sand control bearing assembly. After assembly, the short impeller can float up and down at the same time as other impellers, and the purpose of adding the sand prevention bearing assembly is to help reduce the performance influence of the sand and sundries submersible pump.

Furthermore, the both ends of pump shaft are equipped with the involute spline, are located the bottom involute spline of pump shaft and are equipped with the spline housing assembly body. The involute spline can increase area of contact, and when the hub connection, involute spline area of contact is bigger, can make during the transmission moment that the hub connection is inseparabler, has improved the security of pump shaft connection to transmission efficiency is higher, and anticorrosive, anti erosion's ability improves.

Furthermore, the spline housing assembly body includes the spline housing main part, and the spline housing main part cooperates with the involute spline shaft, is equipped with spindle nose adjusting shim and spindle nose adjusting screw on the involute spline shaft.

Furthermore, the pump shaft is provided with a square key for fixing the impeller on the shaft and preventing the impeller and the pump shaft from rotating relatively, and the square key can drive the impeller to rotate together when the pump shaft rotates so as to lift liquid.

Furthermore, a nameplate is fixed on the outer wall of the lower pump head assembly through a round head rivet.

Compared with the prior art, a pump body for diving oily charge pump subassembly have following advantage:

1. the length of the hub of the impeller is shorter than that of the hub of the impeller, and a sand prevention bearing is arranged every 1-10 impeller guide shells. After assembly, the short impeller can float up and down like other impellers, and the sand prevention bearing assembly is added to help reduce the performance influence of the sand and sundries submersible pump.

2. The involute spline can increase area of contact, and when the hub connection, through involute spline area of contact bigger, can make during the transmission moment inseparabler that the hub connection has improved the security that the pump shaft is connected to transmission efficiency is higher.

3. The shaft head adjusting gasket and the shaft head adjusting screw of the shaft head adjusting component are additionally arranged, so that the shaft extension size of the pump is mainly ensured, the relative position of the impeller and the guide shell is fixed, and the impeller and the thrust surface of the guide shell are not contacted. Therefore, once the sand content in the well fluid is too high when the submersible pump rotates at a high speed, the sand cannot cause violent abrasion on the contact surface of the impeller and the guide shell, thereby achieving the effect of sand prevention.

4. The submersible pump has compact structure and higher efficiency in the same space.

Drawings

The accompanying drawings, which form a part of the present disclosure, are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain the present disclosure. In the drawings:

fig. 1 is a schematic view of a general assembly for an electrical submersible pump assembly according to an embodiment of the present invention;

fig. 2 is a schematic view of an upper pump head assembly for a pump body of an electrical submersible pump assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of an impeller guide housing assembly for a pump body of an electrical submersible pump assembly according to an embodiment of the present invention;

fig. 4 is a schematic view of a lower pump head assembly for a pump body of an electrical submersible pump assembly according to an embodiment of the present invention;

fig. 5 is a schematic view of the spline housing assembly for the pump body of the electrical submersible pump assembly according to an embodiment of the present invention.

Description of reference numerals:

1. a spring washer; 2. an upper transportation cap; 3. a shipping cap; 4. an upper pump head; 5. a lower pump head; 6. an upper bearing sleeve; 7. opening the ring; 8. a pump shaft; 9. a pump housing; 10. an impeller; 11. a guide shell; 12. a retainer ring; 13. a pump housing spacer; 14. a first O-shaped rubber sealing ring; 15. locking a ring; 16. a compression ring; 17. locking the nut; 18. a locking sleeve; 19. a conical nail; 20. a locking plate; 21. a second O-shaped rubber sealing ring; 22. a bottom guide shell; 23. a bottom guide shell positioning ring; 24. a bottom guide shell gasket; 25. a bearing support; 26. a spline housing; 27. a shaft head adjusting gasket; 28. a spindle nose adjusting screw; 29. a square key; 30. a short-handle impeller; 31. a bearing stage guide shell; 32. a bearing housing; 33. a lower bearing sleeve; 34. a bearing-grade spacer sleeve; 35. an isolation sleeve; 36. and a lower bearing support.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A pump body for an electric submersible pump assembly comprises an upper transportation cap 32, a pump body and a transportation cap 3, wherein the upper transportation cap 32 is connected with the pump body through a bolt, and the transportation cap 3 is connected with the pump body through a bolt;

the pump body comprises a plurality of impeller guide shells 10, a pump shaft 8, an upper pump head assembly component, a pump shaft 8, a lower pump head assembly component and a pump shell 9,

the impeller guide shell comprises an impeller 10 and a guide shell 11, and the impeller 10 and the guide shell 11 are sequentially connected on the pump shaft 8 in series; the upper pump head assembly component and the lower pump head assembly component are respectively and fixedly arranged at two ends of the pump shell 9.

The upper end and the lower end of the pump shaft 8 are respectively provided with an upper bearing bush 6 and a lower bearing bush 33; a plurality of impellers 10 and guide shells 11 are arranged between the upper bearing sleeve 6 and the lower bearing sleeve 33 step by step. The upper end of the upper bearing sleeve 6 and the lower end of the lower bearing sleeve 33 are respectively provided with a retainer ring 12 fixedly connected with the pump shaft 8; the lower end of the upper bearing sleeve 6 and the upper end of the lower bearing sleeve 33 are respectively provided with a split ring 7 for locking and fixing the impeller guide shell. And a spacer sleeve 35 is arranged between the pump shaft 8 and the impeller guide shell 10, and the axially-arranged spacer sleeve is actually assembled to fill the axial gap and is installed in the pump shaft 8.

The upper pump head assembly component comprises an upper pump head 4, an upper bearing support 25 and a first bush, wherein the first bush is fixed in the upper bearing support 25, a pump shell gasket 13 is arranged between the upper pump head 4 and a pump shell 9, the tail part of a thread of the upper pump head 4 is provided with a sealing groove, and a first O-shaped rubber sealing ring 14 is arranged in the sealing groove; the pump shell 9 and the guide shell 11 are connected through a locking ring 15 for locking the guide shell; a compression ring 16 is arranged between the locking ring 15 and the guide shell 11. The split ring 7 at the lower end of the upper bearing sleeve 6 is connected with a locking nut 17, the locking nut 17, a locking sleeve 18 and a taper nail 19 for fixing the locking nut 17 and the locking sleeve 18. The pump shaft 8 is provided with a square key 29, and the square key 29 drives the impeller 10 to rotate. And a nameplate is fixed on the outer wall of the lower pump head 5 through a round head rivet.

The lower pump head assembly component comprises a lower pump head 5, a lower bearing support frame 36 and a second bush shaft, wherein the second bush shaft is fixed in the lower bearing support frame 36, the lower pump head 5 is fixedly connected with a pump shell 9 through a locking plate 20, a sealing groove is formed in the thread tail of the lower pump head 5, a second O-shaped rubber sealing ring 21 is arranged in the sealing groove, a bottom guide shell positioning ring 23 used for positioning the bottom guide shell 22 and a bottom guide shell 22 used for fixing the impeller 10 are sequentially arranged between the lower pump head 5 and the guide shell, and a bottom guide shell gasket 24 used for adjusting the axial extension size is arranged between the bottom guide shell positioning ring 23 and the bottom guide shell 22. The upper pump head 4 and the lower pump head 5 are respectively fixedly connected with a bearing support 25.

A sand prevention bearing assembly is arranged between the impeller guide shells 10 and comprises a short handleThe impeller 30, the bearing stage guide shell 31, the bearing sleeve 32 and the bearing stage isolation sleeve 24 are sequentially connected in series on the pump shaft 8, and the bearing stage isolation sleeve 24 and the bearing sleeve 32 are arranged between the short-handle impeller 30 and the bearing stage guide shell 31. The length of the hub of the short-handle impeller is shorter than that of the hub of the impeller, and the short-handle impeller and the hub are separated every two times

A sand control bearing assembly is provided for each impeller guide housing 10. After assembly, the sand control bearing assembly also functions as a bearing support 25 to radially center the pump shaft 8.

The both ends of pump shaft 8 are equipped with the involute spline, are located and are connected with the spline housing assembly body on the bottom involute spline of pump shaft 8. The involute spline can increase area of contact, and when the hub connection, through involute spline area of contact bigger, during the transmission moment can be inseparabler of time hub connection, improved the security that pump shaft 8 connects to transmission efficiency is higher, and anticorrosive, anti erosion's ability improves. The spline housing assembly body comprises a spline housing assembly body 26, a spline housing gasket and a set screw, and the lower end of the pump shaft 8 is provided with a shaft head adjusting gasket 27 and a shaft head adjusting screw 28. The axial connection size of the pump can be adjusted by the spindle head adjusting gasket 27 and the spindle head adjusting screw 28, so that the shaft is connected with the shaft more tightly.

The relative position of the impeller 10 and the guide shell 11 is ensured to be fixed by additionally arranging the shaft head adjusting gasket 27 and the shaft head adjusting screw 28 of the shaft head adjusting member, so that no contact exists between the thrust surfaces of the impeller 10 and the guide shell 11. Therefore, once the sand content in the well fluid is too high when the submersible pump rotates at a high speed, the sand cannot cause severe abrasion on the contact surface of the impeller 10 and the guide shell 11, thereby achieving the effect of sand prevention.

In the specific implementation, liquid enters from the bottom of the lower pump head 5, the impellers 10 are axially positioned on the pump shaft 8 by the split rings at two ends, so that the multistage pressing impellers 10 are mutually connected end to end, and the impellers 10 and the pump shaft 8 cannot relatively displace. When the submersible pump works, the pump shaft 8 is under the action of a larger radial torque force, and the pressing impeller 10 and the pump shaft 8 are fixed together, so that the radial torque force can be transmitted to the impeller 10 to lift liquid. When the impeller 10 is adjusted in the assembling process, the isolation sleeve is tightly pressed through the locking of the locking nut and the locking sleeve, the isolation sleeve tightly presses the impeller, the upper pump head is opened, and the position of the impeller can be adjusted by controlling the locking nut. In the prior art, after the position of the impeller is installed, the impeller cannot be adjusted.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pump body for diving oily charge pump subassembly which characterized in that: the pump comprises an upper transportation cap (2), a pump body and a transportation cap (3), wherein the upper transportation cap (2) is connected with the pump body through a bolt, and the transportation cap (3) is connected with the pump body through a bolt;

the pump body comprises a plurality of impeller guide shell assemblies, a pump shaft (8), an upper pump head assembly, a lower pump head assembly and a pump shell (9); the impeller guide shell component comprises an impeller (10) and a guide shell (11), and the impeller (10) and the guide shell (11) are sequentially connected on the pump shaft (8) in series; the upper pump head assembly component and the lower pump head assembly component are respectively and fixedly arranged at two ends of the pump shell (9);

a locking ring (15) and a compression ring (16) for locking the pump shell (9) and the guide shell (11) are sequentially arranged between the pump shell (9) and the guide shell (11);

be equipped with spacer sleeve (35) on pump shaft (8), the upper end of pump shaft (8) is equipped with the locking Assembly who can lock spacer sleeve (35), and locking Assembly can adjust in last pump head assembly spare.

2. The pump body for an electrical submersible pump assembly according to claim 1, wherein: the upper end and the lower end of the pump shaft (8) are respectively provided with an upper bearing sleeve (6) and a lower bearing sleeve (33); the impellers (10) and the guide shell (11) are arranged between the upper bearing sleeve (6) and the lower bearing sleeve (33) step by step;

the upper end of the upper bearing sleeve (6) and the lower end of the lower bearing sleeve (33) are respectively provided with a retainer ring (12) fixedly connected with the pump shaft (8); the lower end of the upper bearing sleeve (6) and the upper end of the lower bearing sleeve (33) are respectively provided with a split ring (7) for fixing the position of the guide shell of the impeller.

3. The pump body for an electrical submersible pump assembly according to claim 1, wherein: go up pump head assembly subassembly and include pump head (4), the assembly of upper bearing stand, go up and be equipped with pump case gasket (13) between pump head (4) and pump case (9), the screw thread tail end of going up pump head (4) has a seal groove, installs first O type rubber seal (14) in the seal groove.

4. The pump body for an electrical submersible pump assembly according to claim 2, wherein: the locking assembly comprises a locking nut (17), a locking sleeve (18) and a taper nail (19), the locking nut (17) and the split ring (7) at the lower end of the upper bearing sleeve (6) are connected with the locking nut (17) through threads and used for locking the impeller and enabling the impeller and the shaft to relatively fix the locking sleeve (18), and the taper nail (19) for preventing the locking nut (17) and the locking sleeve (18) from loosening is arranged on the locking nut (17).

5. The pump body for an electrical submersible pump assembly according to claim 1, wherein: the lower pump head assembly component comprises a lower pump head (5) and a lower bearing support frame, the lower pump head (5) is fixedly connected with a pump shell (9) through a locking plate (20), a sealing groove is formed in the tail end of a thread of the lower pump head (5), a second O-shaped rubber sealing ring (21) is installed in the sealing groove, a bottom guide shell positioning ring (23) and a bottom guide shell (22) used for fixing an impeller (10) are sequentially arranged between the lower pump head assembly component and the impeller (10), and a bottom guide shell gasket (24) used for adjusting the axial dimension is arranged between the bottom guide shell positioning ring (23) and the bottom guide shell (22).

6. The pump body for an electrical submersible pump assembly according to claim 3, wherein: go up pump head assembly subassembly and pump head assembly subassembly down, the assembly of upper bearing stand includes upper bearing stand (25), and pump head assembly subassembly includes lower bearing stand (36) down, goes up pump head (4) and lower pump head (5) respectively with upper bearing stand (25) and lower bearing stand (36) fixed connection.

7. The pump body for an electrical submersible pump assembly according to claim 1, wherein: be equipped with sand control bearing subassembly between a plurality of impeller guide shell, sand control bearing subassembly is including short impeller (30), bearing level guide shell (31), bearing housing (32) and bearing level spacer sleeve (34), and impeller, guide shell, short impeller (30), bearing level guide shell (31), bearing housing (32) and bearing level spacer sleeve (34) are in proper order according to the operation requirement concatenate on pump shaft (8).

8. The pump body for an electrical submersible pump assembly according to claim 1, wherein: the two ends of the pump shaft (8) are provided with involute splines, and a spline sleeve assembly is arranged on the involute splines at the bottom of the pump shaft (8).

9. The pump body for an electrical submersible pump assembly according to claim 8, wherein: spline housing assembly body includes spline housing main part (26), and spline housing assembly body and involute spline shaft cooperate, are equipped with spindle nose adjusting shim (27) and spindle nose adjusting screw (28) on the involute spline shaft.

10. The pump body for an electrical submersible pump assembly according to claim 1, wherein: be equipped with on pump shaft (8) and be used for fixing impeller (10) epaxial and prevent square key (29) of the relative rotation of impeller (10) and pump shaft (8), there is the data plate through button head rivet fastening on the outer wall of pump head (5) down.