Combined bearing for screw drill transmission shaft
By designing the integrated dynamic and static ring combined bearing structure, the structural complexity, stability and load-bearing capacity of drilling tool thrust bearings is solved, and higher accuracy and stability are achieved and service life is extended.
Patent Information
- Application Number
- CN202421980007.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The existing drill tool thrust bearings have complex structures, poor stability, limited load capacity and difficult to ensure accuracy.
The integrated structure is a single split outer ring design consisting of the dynamic ring and the end-face static ring and the static ring body. The outer wall of the dynamic ring and the inner wall of the static ring are equipped with suitable ball grooves, and the steel balls are rolled to form a compact combined bearing structure.
It improves the structural compactness of the bearing, reduces assembly errors, enhances the stability and accuracy of the transmission shaft, can withstand large axial loads, resists external forces and vibrations, and extends service life.
Smart Images
Figure CN223136737U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearings, in particular to a combined bearing for a drive shaft of a positive displacement motor drill Background Art
[0002] At present, the thrust bearings used in drills globally are all a set of bearings composed of multiple single outer rings and inner rings, or multiple single outer rings and two inner rings. Most of the existing drill thrust bearings have the following problems:
[0003] 1. Complex structure: Composed of multiple independent components, it increases the difficulty and complexity of assembly, and is also prone to errors during the assembly process.
[0004] 2. Poor stability: Compared with the integral structure, the connection and cooperation between the split components may not be tight and stable enough. When bearing large loads and complex working conditions, problems such as loosening and misalignment are likely to occur, affecting the stability and reliability of the bearing.
[0005] 3. Limited load-bearing capacity: The connection parts between the split components may become weak links, affecting the overall load-bearing capacity and making it difficult to withstand extreme load conditions.
[0006] 4. Difficult to guarantee accuracy: The manufacturing and assembly accuracy of the split components are difficult to control, which may affect the running accuracy and working performance of the bearing. Summary of the Utility Model
[0007] (1) Technical problems to be solved
[0008] In view of the deficiencies of the prior art, the utility model provides a combined bearing for a drive shaft of a positive displacement motor drill, which solves the technical problems of the existing drill thrust bearings, such as complex structure, poor stability, limited load-bearing capacity, and difficult to guarantee accuracy.
[0009] (2) Technical solutions
[0010] To achieve the above objectives, the utility model is realized through the following technical solutions:
[0011] A combined bearing for a drive shaft of a positive displacement motor drill includes a moving ring. The outer wall of the moving ring is rotatably connected to an outer ring. The outer ring includes two end static rings and a static ring body. The two end static rings are respectively fixedly connected to both ends of the static ring body.
[0012] Preferably: Five rows of main ball grooves are provided on the outer wall of the moving ring, including a first main ball groove, a second main ball groove, a third main ball groove, a fourth main ball groove, and a fifth main ball groove.
[0013] Preferably: Five rows of secondary ball grooves are provided on the inner wall of the static ring body, including a first secondary ball groove, a second secondary ball groove, a third secondary ball groove, a fourth secondary ball groove, and a fifth secondary ball groove.
[0014] Preferably, the first main ball groove is adapted to the first auxiliary ball groove, the second main ball groove is adapted to the second auxiliary ball groove, the third main ball groove is adapted to the third auxiliary ball groove, the fourth main ball groove is adapted to the fourth auxiliary ball groove, and the fifth main ball groove is adapted to the fifth auxiliary ball groove.
[0015] Preferably, steel balls are rollingly connected in the first main ball groove, the second main ball groove, the third main ball groove, the fourth main ball groove and the fifth main ball groove, and the sides of the five groups of steel balls away from the moving ring are rollingly connected to the first auxiliary ball groove, the second auxiliary ball groove, the third auxiliary ball groove, the fourth auxiliary ball groove and the fifth auxiliary ball groove.
[0016] Preferably, the inner diameter of the moving ring is 95 MM, and the tolerance range is +0.05 MM. The outer diameter of the moving ring is 124 MM, and the tolerance range is ±0.1 MM.
[0017] Preferably, the inner diameter of the static ring body is 126 MM, and the tolerance range is ±0.1 MM. The outer diameter of the static ring body is 155 MM, and the tolerance range is -0.05 MM. The lengths of the moving ring and the static ring body are both 210 MM, and the tolerance ranges are both ±0.12 MM. The distance between the outer ring of the moving ring and the inner ring of the static ring body is 2 MM.
[0018] Preferably, the diameter of the steel ball is 20.638 MM, and the axial distance between the steel balls at both ends of the moving ring and the static ring body from both ends of the moving ring and the static ring body is 35 MM, and the tolerance range is ±0.02 MM.
[0019] (III) Beneficial effects
[0020] 1. In this application, a moving ring with an integrated structure is provided, and the outer ring composed of the end face static ring and the static ring body is a single split structure. The integrated moving ring reduces the number of parts, makes the overall structure more compact, enables this application to have the effect of a compact structure, and the integrated structure helps to reduce the errors that may occur during the assembly process, improve the accuracy and performance of the transmission shaft, and solve the technical problems of the existing thrust bearing of the drill tool having a complex structure, poor stability and difficult to guarantee accuracy.
[0021] Second, the overall device consists of a dynamic ring, an end face static ring, a static ring body, and a thrust ball bearing structure composed of steel balls. This structure can withstand large axial loads, ensuring the stability and reliability of the transmission shaft during operation. Since all parts of the integrated dynamic ring structure are closely connected and have strong integrity, it can better resist various external forces and vibrations during operation, reducing performance degradation caused by component loosening or wear. It has anti-fragmentation, anti-wear, and impact resistance, with its structural form remaining intact, long bearing life, and strong applicability, enabling this application to have strong bearing capacity. The integrated dynamic ring structure improves the bearing capacity, has good stability under large loads and complex working conditions in deep wells, and overall extends the service life of the entire device. At the same time, the optimized structure and good bearing performance can improve the working efficiency of the positive displacement motor and extend its service life, solving the problem of limited bearing capacity of the existing drill thrust bearing, and at the same time enabling this application to have a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and implement it in accordance with the content of the specification, the following describes in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings.
[0023] Figure 1 It is a sectional view structure diagram of the overall device of the present utility model;
[0024] Figure 2 It is a sectional view structure diagram of the first auxiliary ball groove provided on the static ring body of the present utility model.
[0025] Legend: 1. Dynamic ring; 2. End face static ring; 3. Static ring body; 4. Steel ball; 101. First main ball groove; 102. Second main ball groove; 103. Third main ball groove; 104. Fourth main ball groove; 105. Fifth main ball groove; 301. First auxiliary ball groove; 302. Second auxiliary ball groove; 303. Third auxiliary ball groove; 304. Fourth auxiliary ball groove; 305. Fifth auxiliary ball groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] By providing a combined bearing for the transmission shaft of a positive displacement motor in the embodiments of the present application, the problems of complex structure, poor stability, limited bearing capacity, and difficult accuracy guarantee of the existing drill thrust bearing are effectively solved.
[0027] As Figure 1 and Figure 2 shown, the technical solution in the embodiments of the present application effectively solves the technical problems of complex structure, poor stability, limited bearing capacity, and difficult accuracy guarantee of the existing drill thrust bearing. The general idea is as follows:
[0028] In view of the problems existing in the prior art, the utility model provides a combined bearing for the drive shaft of a positive displacement motor, which includes a moving ring 1. The outer wall of the moving ring 1 is rotatably connected with an outer ring. The outer ring includes two end face static rings 2 and a static ring body 3. The two end face static rings 2 are respectively fixedly connected to both ends of the static ring body 3.
[0029] Five rows of main ball grooves are provided on the outer wall of the moving ring 1, including a first main ball groove 101, a second main ball groove 102, a third main ball groove 103, a fourth main ball groove 104 and a fifth main ball groove 105.
[0030] Five rows of auxiliary ball grooves are provided on the inner wall of the static ring body 3, including a first auxiliary ball groove 301, a second auxiliary ball groove 302, a third auxiliary ball groove 303, a fourth auxiliary ball groove 304 and a fifth auxiliary ball groove 305.
[0031] The first main ball groove 101 is adapted to the first auxiliary ball groove 301, the second main ball groove 102 is adapted to the second auxiliary ball groove 302, the third main ball groove 103 is adapted to the third auxiliary ball groove 303, the fourth main ball groove 104 is adapted to the fourth auxiliary ball groove 304, and the fifth main ball groove 105 is adapted to the fifth auxiliary ball groove 305.
[0032] Steel balls 4 are rollingly connected in the first main ball groove 101, the second main ball groove 102, the third main ball groove 103, the fourth main ball groove 104 and the fifth main ball groove 105. The sides of the five groups of steel balls 4 away from the moving ring 1 are rollingly connected with the first auxiliary ball groove 301, the second auxiliary ball groove 302, the third auxiliary ball groove 303, the fourth auxiliary ball groove 304 and the fifth auxiliary ball groove 305.
[0033] The inner diameter of the inner ring of the moving ring 1 is 95 MM, and the tolerance range is +0.05 MM. The outer diameter of the outer ring of the moving ring 1 is 124 MM, and the tolerance range is ±0.1 MM.
[0034] The inner diameter of the inner ring of the static ring body 3 is 126 MM, and the tolerance range is ±0.1 MM. The outer diameter of the outer ring of the static ring body 3 is 155 MM, and the tolerance range is -0.05 MM. The lengths of both the moving ring 1 and the static ring body 3 are 210 MM, and the tolerance ranges are both ±0.12 MM. The distance between the outer ring of the moving ring 1 and the inner ring of the static ring body 3 is 2 MM.
[0035] The diameter of the steel ball 4 is 20.638 MM. The axial distance from the steel balls 4 at both ends of the moving ring 1 and the static ring body 3 to both ends of the moving ring 1 and the static ring body 3 is 35 MM, and the tolerance range is ±0.02 MM.
[0036] Working principle:
[0037] The moving ring 1 in this device is of an integral structure, and the outer ring composed of the end face static ring 2 and the static ring body 3 is a single split structure. The integral structure of the moving ring 1 reduces the number of components, making the overall structure more compact. The integrated structure helps to reduce the errors that may occur during the assembly process, improving the accuracy and performance of the transmission shaft. The thrust ball bearing adopted by the whole device can bear a large axial load, ensuring the stability and reliability of the transmission shaft during operation. Since each part of the integral moving ring 1 structure is closely connected and has strong integrity, it can better resist various external forces and vibrations during operation, reducing the performance degradation caused by component loosening or wear. It has anti-fragmentation, anti-wear, and impact resistance, its structural form remains intact, it has a long pressure-bearing life, and strong applicability.
[0038] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.
Claims
1. A combined bearing for a drive shaft of a positive displacement motor, characterized in that, It includes a rotating ring (1), and the outer wall of the rotating ring (1) is rotatably connected to an outer ring; Among them, the outer ring includes two end face static rings (2) and a static ring body (3), and the two end face static rings (2) are respectively fixedly connected to both ends of the static ring body (3); Five rows of main ball grooves are provided on the outer wall of the rotating ring (1), including a first main ball groove (101), a second main ball groove (102), a third main ball groove (103), a fourth main ball groove (104) and a fifth main ball groove (105); Steel balls (4) are rotatably connected in the first main ball groove (101), the second main ball groove (102), the third main ball groove (103), the fourth main ball groove (104) and the fifth main ball groove (105), and the side of the steel ball (4) away from the rotating ring (1) is rotatably connected to a first auxiliary ball groove (301), a second auxiliary ball groove (302), a third auxiliary ball groove (303), a fourth auxiliary ball groove (304) and a fifth auxiliary ball groove (305); The inner diameter of the inner circle of the rotating ring (1) is 95MM, and the tolerance range is +0.05MM. The outer diameter of the outer circle of the rotating ring (1) is 124MM, and the tolerance range is ±0.1MM; The inner diameter of the inner circle of the static ring body (3) is 126MM, and the tolerance range is ±0.1MM. The outer diameter of the outer circle of the static ring body (3) is 155MM, and the tolerance range is -0.05MM. The lengths of the rotating ring (1) and the static ring body (3) are both 210MM, and the tolerance ranges are both ±0.12MM. The distance between the outer circle of the rotating ring (1) and the inner circle of the static ring body (3) is 2MM; The diameter of the steel ball (4) is 20.638MM, and the axial distance from the steel balls (4) at both ends of the rotating ring (1) and the static ring body (3) to both ends of the rotating ring (1) and the static ring body (3) is 35MM, and the tolerance range is ±0.02MM.
2. The combined bearing for the drive shaft of a positive displacement motor according to claim 1, wherein Five rows of auxiliary ball grooves are provided on the inner wall of the static ring body (3), including a first auxiliary ball groove (301), a second auxiliary ball groove (302), a third auxiliary ball groove (303), a fourth auxiliary ball groove (304) and a fifth auxiliary ball groove (305).
3. The combined bearing for the drive shaft of a positive displacement motor according to claim 2, wherein The first main ball groove (101) is adapted to the first auxiliary ball groove (301), the second main ball groove (102) is adapted to the second auxiliary ball groove (302), the third main ball groove (103) is adapted to the third auxiliary ball groove (303), the fourth main ball groove (104) is adapted to the fourth auxiliary ball groove (304), and the fifth main ball groove (105) is adapted to the fifth auxiliary ball groove (305).