CN203114703U - Electric submersible pump capable of avoiding fracture failure of pump shaft - Google Patents
Electric submersible pump capable of avoiding fracture failure of pump shaft Download PDFInfo
- Publication number
- CN203114703U CN203114703U CN 201320162298 CN201320162298U CN203114703U CN 203114703 U CN203114703 U CN 203114703U CN 201320162298 CN201320162298 CN 201320162298 CN 201320162298 U CN201320162298 U CN 201320162298U CN 203114703 U CN203114703 U CN 203114703U
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- pump shaft
- circle
- pump
- spline
- groove
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Abstract
An electric submersible pump capable of avoiding fracture failure of a pump shaft mainly solves the problem that a pump shaft of an electric submersible pump in the prior art can easily fracture and fail. The electric submersible pump is characterized in that the section of the root portion of a spline on the pump shaft (1) is of a curved surface structure, and the curved surface structure is formed after an inward-concave guide round (3) with an inner circular arc and an outward-convex guide round (2) with an outer circular arc transit smoothly and are connected. The section of the root portion of an inner key groove of a spline sleeve (4) is also of a curved surface structure, wherein the curved surface structure is formed after a groove outward-convex guide round (6) with an outer circular arc and a groove inward-concave guide round (7) with an inner circular arc transit smoothly and are connected. The inward-concave guide round (3) is matched with the groove outward-convex guide round (6). The outward-convex guide round (2) is matched with the groove inward-concave guide round (7). According to the electric submersible pump, the pump shaft and the spline sleeve are improved, stress concentration at the root portion of the spline of the pump shaft and shear deformation to the pump shaft by the spline sleeve can be reduced, and accordingly the fracture failure of the pump shaft can be avoided.
Description
Technical field
The utility model relates to a kind of submersible electric pump.
Background technique
The effect of submersible electric pump is that the liquid with the down-hole pumps to ground.The rotating part of pump mainly is made up of pump shaft, spline housing, key, impeller, thrust washer, axle sleeve, spacer and circlip for shaft etc.; Standing part is mainly by leading shell, pump case, joint, O-ring seals, compressing pipe and top bearing support etc. is formed.In the evaluation of Electric Submersible Pump Unit security of system and failure analysis, find, submersible electric pump break down rate the highest be pump shaft and impeller.The failure mode of pump shaft mainly is wearing and tearing and fracture failure, and the position of generation mainly connects spline outer end and keyway place at pump shaft.
Summary of the invention
In order to solve the problems of the prior art of mentioning in the background technique, the utility model provides a kind of submersible electric pump of avoiding the pump shaft fracture failure, this kind submersible electric pump improves pump shaft and spline housing, the stress that scheme after the improvement can reduce pump shaft spline root concentrate and spline housing to the shear deformation of pump shaft, thereby avoid the pump shaft fracture failure.
The technical solution of the utility model is: this kind can be avoided the submersible electric pump of pump shaft fracture failure, comprises the rotating unit be made up of pump shaft, spline housing, impeller, thrust washer, axle sleeve, spacer and circlip for shaft and by leading shell, pump case, joint, compressing the fixed unit that pipe and top bearing support are formed.Its unique distinction is: the cross section of described pump shaft upper spline root is curved-surface structure, described curved-surface structure by the indent of circular arc in adopting lead circle and the evagination that adopts external arc lead round slip over to cross constitute after being connected; The sectional shape of described spline housing interior spline root also is curved-surface structure, by evagination in the groove that adopts external arc lead circle and adopt in the groove of circular arc indent lead round slip over to cross constitute after being connected; Described indent leads circle and the interior evagination of groove is led round matching, and evagination is led circle and led round matching with the interior indent of groove.
The utlity model has following beneficial effect: the submersible electric pump after this kind improvement, with the single external arc of pump shaft spline root change into by evagination in the groove that adopts external arc lead circle and adopt in the groove of circular arc indent lead round slipping over and cross the curved-surface structure that constitutes after being connected, having reduced the stress of pump shaft spline root on the one hand concentrates, can spline housing when improving pump shaft to transmit torque capability to the shear deformation of pump shaft, thereby avoid the pump shaft fracture failure.The curvilinear structures that cooperates in the teeth groove of spline housing is conducive to reduce the initial crack formation of spline housing in addition, makes anti-shear ability increase.
Description of drawings:
Fig. 1 is the main pseudosection of pump shaft described in the utility model.
Fig. 2 is the side view of pump shaft described in the utility model.
Fig. 3 is the plan view of spline housing described in the utility model.
Fig. 4 is the side cutaway view of spline housing described in the utility model.
1-pump shaft among the figure, the 2-evagination is led circle, and the 3-indent is led circle, the 4-spline housing, the 5-chamfering, evagination is led circle in the 6-groove, and indent is led circle in the 7-groove.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figures 1 to 4, this kind can be avoided the submersible electric pump of pump shaft fracture failure, comprises the rotating unit be made up of pump shaft 1, spline housing 4, impeller, thrust washer, axle sleeve, spacer and circlip for shaft and by leading shell, pump case, joint, compressing the fixed unit that pipe and top bearing support are formed.Its unique distinction is: the cross section of described pump shaft 1 upper spline root is curved-surface structure, and described curved-surface structure is led circle 3 by the indent of circular arc in adopting and adopted the evagination of external arc to lead and constitutes after round 2 rounding ofves are connected; The sectional shape of described spline housing 4 interior spline roots also is curved-surface structure, by evagination in the groove that adopts external arc lead circle 6 and adopt in the groove of circular arc indent lead and constitute after round 7 rounding ofves are connected; Described indent is led in circle 3 and the groove evagination and is led circle and 6 match, and evagination is led in circle 2 and the groove indent and led circle 7 and match.
This programme carries out as above, and improved reason is: the main cause of analyzing the pump shaft fracture failure is just in the joint of pump shaft and spline housing.This be since the torsional deflection of pump shaft much larger than the torsional deflection of spline housing, after this just makes that big resiliently deformable takes place the pump shaft spline that is positioned at the spline housing outer end, and the pump shaft spline in the spline housing does not almost have resiliently deformable, thereby make the splined end of spline housing as scissors, at torsional interaction down cut pump shaft spline, very easily form initial crack in spline sides, cause pump shaft generation plastic fracture to lose efficacy.Secondly, pump shaft and spline housing are Spielpassung, in transmitting the dynamic torque process, because storage and the release of the elastic deformation energy of pump shaft, make pump shaft and spline housing joint frequently take place to impact and friction, the instantaneous stress that the pump shaft spline bears can be very big, and particularly pump shaft spline root stress can occur and concentrates, very easily form initial crack, cause pump shaft spline joint to be lost efficacy.This failure mode is along with the increase in spline fitted gap and the frequent fluctuation of transmission moment of torsion, and inefficacy part probability can be increasing.Therefore, this programme with the single external arc of pump shaft spline root change into by evagination in the groove that adopts external arc lead circle and adopt in the groove of circular arc indent lead round slipping over and cross the curved-surface structure that constitutes after being connected.Having reduced the stress of pump shaft spline root so on the one hand concentrates, can spline housing when improving pump shaft to transmit torque capability to the shear deformation of pump shaft, the curvilinear structures that cooperates in the teeth groove of spline housing is conducive to reduce the initial crack formation of spline housing in addition, makes anti-shear ability increase.
During specific implementation, consider the particular surroundings of down-hole, limiting described indent, to lead circle radius be 0.2 millimeter, and it is 0.5 millimeter that evagination is led radius of a circle.In addition, adopt 0.3 millimeter, 45 chamferings of spending 5 at the spline two ends of spline housing 4 tooth top.The corner angle abate is removed burr.
Claims (3)
1. the submersible electric pump that can avoid the pump shaft fracture failure, comprise the rotating unit formed by pump shaft (1), spline housing (4), impeller, thrust washer, axle sleeve, spacer and circlip for shaft and by leading shell, pump case, joint, compressing the fixed unit that pipe and top bearing support are formed, it is characterized in that: the cross section of described pump shaft (1) upper spline root is curved-surface structure, described curved-surface structure lead circle (3) by the indent of circular arc in adopting and adopt the evagination of external arc lead circle (2) rounding off is connected after formation; The sectional shape of described spline housing (4) interior spline root also is curved-surface structure, by evagination in the groove that adopts external arc lead circle (6) and adopt in the groove of circular arc indent lead circle (7) rounding off is connected after formation; Described indent is led in circle (3) and the groove evagination and is led circle (6) and match, and evagination is led in circle (2) and the groove indent and led circle (7) and match.
2. a kind of submersible electric pump of avoiding the pump shaft fracture failure according to claim 1 is characterized in that: it is 0.2 millimeter that described indent is led circle (3) radius, and the radius that evagination is led circle (2) is 0.5 millimeter.
3. a kind of submersible electric pump of avoiding the pump shaft fracture failure according to claim 2 is characterized in that: adopt chamfering (5) at the spline two ends of spline housing (4) tooth top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320162298 CN203114703U (en) | 2013-04-03 | 2013-04-03 | Electric submersible pump capable of avoiding fracture failure of pump shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320162298 CN203114703U (en) | 2013-04-03 | 2013-04-03 | Electric submersible pump capable of avoiding fracture failure of pump shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114703U true CN203114703U (en) | 2013-08-07 |
Family
ID=48895053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320162298 Expired - Fee Related CN203114703U (en) | 2013-04-03 | 2013-04-03 | Electric submersible pump capable of avoiding fracture failure of pump shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374914A (en) * | 2019-07-25 | 2019-10-25 | 江苏大学镇江流体工程装备技术研究院 | A kind of pump shaft connection structure and its design method of centrifugal pump |
-
2013
- 2013-04-03 CN CN 201320162298 patent/CN203114703U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374914A (en) * | 2019-07-25 | 2019-10-25 | 江苏大学镇江流体工程装备技术研究院 | A kind of pump shaft connection structure and its design method of centrifugal pump |
| CN110374914B (en) * | 2019-07-25 | 2020-11-20 | 江苏大学镇江流体工程装备技术研究院 | Pump shaft connecting structure of centrifugal pump and design method thereof |
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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: 20130807 Termination date: 20140403 |