Self-balancing circular hole wall friction and wear measuring platform measuring rotation and fine adjustment mechanism

Abstract

The application discloses a kind of self-balancing round hole wall friction and wear measuring platform measurement rotary and fine adjustment mechanism, including rock rotary mechanism and limiting mechanism;Rock rotary mechanism includes rotary motor, rotary motor output shaft is connected with driving gear, driving gear is engaged with turntable bearing outer ring, turntable bearing inner ring is connected with support plate, gear protection cover is fixed with support plate and is placed in the outside of turntable bearing and driving gear, rock shield is set on support plate and is placed outside rock, sealing disc is set on the top of rock shield;Limiting mechanism includes limiting component and limiting frame, limiting component includes first limiting plate, first limiting plate bottom is connected with support body by limiting frame, limiting shaft passes through the through-hole of first limiting plate and second limiting plate, and limiting shaft both ends are fixed by limiting sleeve, third limiting plate is connected with second limiting plate, third limiting plate is connected with support plate, the present application can satisfy different lubricating medium test conditions.

Description

Technical Field

[0001] This invention relates to the field of friction pair wear testing technology, and in particular to a measuring rotation and fine-tuning mechanism for a self-balancing circular hole wall friction wear measuring platform. Background Technology

[0002] Frictional wear failure between downhole drilling tools and rock is one of the main failure modes of drilling tools. Furthermore, the frictional wear contact surface between the drilling tool and the rock is often subjected to the combined effects of multiple media, including gases, liquids, and solids, leading to diverse and complex material wear behavior and damage mechanisms. Therefore, accurately detecting the frictional wear characteristics and performance parameters between the drilling tool and the borehole wall based on simulating actual working conditions is particularly important.

[0003] Currently, the evaluation of material friction and wear properties is mainly conducted using friction and wear testing machines. The principle of various friction and wear testing machines is as follows: a clamping mechanism holds and fixes the test piece, and then a moving platform drives the clamping mechanism to reciprocate, causing a standard grinding head to grind against the test piece. This method has several shortcomings: First, because the test piece is only subjected to unidirectional force, the clamping mechanism will inevitably deform under this force. To minimize deformation, other components of the testing machine are often reinforced, leading to increased size and weight, and generating significant vibration during testing. Second, the testing methods are mostly plane-to-plane or curved-to-plane, while the size of downhole drilling tools is generally much larger than the size of the test pieces used in friction and wear testing machines, and the contact between the drilling tool and the rock is generally curved-to-curved. Third, the test piece is subjected to a force arm that is parallel to the frictional force and clamping force, resulting in uneven force distribution at the clamping end, which is also a major reason for poor test data accuracy. These shortcomings mean that existing friction and wear testing machines cannot adequately meet the testing requirements for the friction and wear properties between downhole drilling tools and the wellbore. To address this, a self-balancing circular hole wall friction and wear testing platform was invented. However, this platform requires a rotary mechanism in conjunction with a lifting mechanism to enable rotational motion, linear vertical movement, and spiral vertical movement with the rock sample. Simultaneously, to ensure the rotary mechanism maintains alignment and fixation between the centerline of the rock hole and the centerline of the testing mechanism during rotation, a fine-tuning mechanism is needed. This rotary and fine-tuning mechanism is an essential component of the self-balancing circular hole wall friction and wear testing platform. Therefore, a rotary and fine-tuning mechanism for the self-balancing circular hole wall friction and wear testing platform was invented. Summary of the Invention

[0004] The purpose of this invention is to provide a measuring rotation and fine-tuning mechanism for a self-balancing circular hole wall friction and wear measuring platform. The measuring platform is rotated by a motor that drives the gears and the rock to rotate. The fine-tuning mechanism is used to make the center line of the rock through hole coincide with the center line of the testing mechanism and keep them fixed.

[0005] To address the shortcomings in the aforementioned background technology, this invention aims to provide a measurement rotation and fine-tuning mechanism for a self-balancing circular hole wall friction and wear measurement platform.

[0006] The measuring rotation and fine-tuning mechanism of the self-balancing circular hole wall friction and wear measuring platform includes a rock rotation mechanism and a limiting mechanism;

[0007] The rock rotation mechanism includes a sealing disc, a rock cover, a rock, a gear cover, a support plate, a sealing gasket, a turntable bearing, a drive gear, a support plate, and a rotation motor.

[0008] The output shaft of the rotary motor is connected to the drive gear via a key. The drive gear meshes with the outer ring of the turntable bearing. The inner ring of the turntable bearing is connected to the support plate via bolts. The outer ring of the turntable bearing is coaxially fixed to the sealing gasket and the support plate. A circular hole is opened in the middle of the support plate for concentric cooperation with the external centering device. The gear guard is fixed to the support plate and placed outside the turntable bearing and the drive gear. The rock guard is set on the support plate and placed outside the rock. The sealing disc is set on the top of the rock guard.

[0009] The limiting mechanism includes limiting components and limiting frames. There are two limiting components, symmetrically arranged on both sides of the support body. Each limiting component consists of a first limiting plate, a second limiting plate, multiple third limiting plates, a limiting shaft, and a limiting sleeve. The bottom of the first limiting plate is connected to the support body through the limiting frame. The second limiting plate is square with a through hole in the middle. The limiting shaft passes through the through hole of the first and second limiting plates, and both ends of the limiting shaft are fixed by the limiting sleeve. Multiple third limiting plates form a square surrounding the second limiting plate in the center and are connected to the second limiting plate by bolts. The third limiting plates are connected to the support plate by bolts.

[0010] The beneficial effects of this invention are:

[0011] 1. In conjunction with the lifting mechanism, the measuring platform has a rotary motion to complete the rotation, vertical linear and spiral vertical motion with the rock sample.

[0012] 2. Transferring the rotational motion to the test piece, i.e., the rock, eliminates the influence of centrifugal force between the test piece and the clamping mechanism, thereby improving the reliability of the test results.

[0013] 3. The sealing disc, rock cover, support plate and sealing gasket form a closed cavity, which can meet the test conditions of different lubricating media.

[0014] 4. The fine-tuning mechanism ensures that the centerline of the rock borehole is aligned with and fixed to the centerline of the testing mechanism.

[0015] 5. By changing the rock, the friction and wear performance between the test block and different types of rocks can be measured. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention installed on the friction and wear measurement platform.

[0017] Figure 2 This is a schematic cross-sectional view of the rock rotation mechanism of the present invention.

[0018] Figure 3 This is a schematic diagram of the limiting mechanism of the present invention.

[0019] 13. Sealing disc; 14. Rock cover; 15. Rock; 16. Gear cover; 17. Support plate; 18. Sealing gasket; 19. Turntable bearing; 20. Drive gear; 21. Support plate; 22. Rotary motor;

[0020] First limiting plate 3901; second limiting plate 3902; multiple third limiting plates 3903; limiting shaft 3904; limiting sleeve 3905. Detailed Implementation

[0021] Please refer to the attached figure for the measuring rotation and fine-tuning mechanism of the self-balancing circular hole wall friction and wear measuring platform, which includes a rock rotation mechanism and a limiting mechanism;

[0022] The rock rotation mechanism includes a sealing disc 13, a rock cover 14, a rock 15, a gear cover 16, a support plate 17, a sealing gasket 18, a turntable bearing 19, a drive gear 20, a support plate 21, and a rotation motor 22.

[0023] The output shaft of the rotary motor 22 is connected to the drive gear 20 via a key. The drive gear 20 meshes with the outer ring of the turntable bearing 19. The inner ring of the turntable bearing 19 is connected to the support plate 21 via bolts. When the rotary motor 22 rotates, the turntable bearing 19 can achieve the effect of separating the dynamic and static parts. The outer ring of the turntable bearing 19 is coaxially fixed with the sealing gasket 18 and the support plate 17. The rock is placed on the support plate 17. Therefore, when the outer ring of the turntable bearing 19 rotates, it will drive the sealing gasket 18, the support plate 17 and the rock 15 to rotate together. The support plate 17 has a round hole in the middle for concentric cooperation with the external centering device. The gear guard 16 is fixed to the support plate 21 and placed outside the turntable bearing 19 and the drive gear 20. The gear guard 16 protects the turntable bearing 19 and the drive gear 20. The rock guard 14 is placed on the support plate 17 and placed outside the rock 15 to protect the rock 15. The sealing disc 13 is placed on the top of the rock guard 14 to prevent the lubricating medium from splashing.

[0024] The limiting mechanism includes limiting components and limiting frames. There are two limiting components, symmetrically arranged on both sides of the support body. Each limiting component consists of a first limiting plate 3901, a second limiting plate 3902, multiple third limiting plates 3903, a limiting shaft 3904, and a limiting sleeve 3905. The bottom of the first limiting plate 3901 is connected to the support body via the limiting frame. The second limiting plate 3902 is square with a through hole in the center. The limiting shaft 3904 passes through the first limiting plate 3901 and the second limiting plate 3905. The positioning plate 3902 has a through hole, and the two ends of the limiting shaft 3904 are fixed by the limiting sleeve 3905. Multiple third limiting plates 3903 form a square that surrounds the second limiting plate 3902 in the center and are connected to the second limiting plate 3902 by bolts. The third limiting plates 3903 are connected to the support plate 21 by bolts. When the rock rotation mechanism moves to the appropriate position, the support plate 21 is connected to the multiple third limiting plates 3903 by bolts to prevent the rock rotation mechanism from moving during the test.

[0025] Furthermore, the sealing disc 13, rock shield 14, support plate 17 and sealing gasket 18 form a sealed cavity that can meet the test conditions of different lubricating media.

[0026] Working principle and usage of this invention:

[0027] Rock rotation mechanism process and principle:

[0028] After the rotary motor 22 under the support plate 21 is started, it drives the drive gear 20 to rotate. The drive gear 20 meshes with the outer ring of the turntable bearing 19 placed above the support plate 21, causing the outer ring of the turntable bearing 19 to rotate. The outer ring of the turntable bearing 19 is coaxially fixed to the sealing gasket 18 and the support plate 17. The rock is placed on the support plate 17 and fixed around it by positioning blocks, pads and clamping plates. Therefore, when the outer ring of the turntable bearing 19 rotates, it will drive the rock 15 to rotate together. The gear guard 16 is fixed to the support plate 21 and placed outside the turntable bearing 19 and the drive gear 20 to prevent foreign objects from interfering with the meshing between the turntable bearing 19 and the drive gear 20. The rock guard 14 is set on the support plate 17 and placed outside the rock 15 to protect the rock 15. The sealing disc 13 is set on the top of the rock guard 14 to prevent the lubricating medium from splashing.

[0029] Limiting mechanism principle:

[0030] First, the first limiting plate 3901 is fixed to the limiting frame with bolts. Then, the bolt distance between the multiple third limiting plates 3903 and the second limiting plate 3902 is adjusted so that the limiting holes on the multiple third limiting plates 3903 are aligned with the holes on the support plate 21. Then, bolts are used to connect them to ensure the stability of the rock rotation mechanism during the test.

Claims

1. A self-balancing circular hole wall friction and wear measurement platform measurement rotation and fine adjustment mechanism, characterized in that: The rock rotating mechanism and the limiting mechanism are included. The rock rotating mechanism includes a sealing disc (13), a rock shield (14), a rock (15), a gear shield (16), a support plate (17), a sealing gasket (18), a rotating disc bearing (19), a driving gear (20), a supporting plate (21) and a rotating motor (22). The output shaft of the rotating motor (22) is connected with the driving gear (20) through a key, the driving gear (20) is engaged with the outer ring of the rotating disc bearing (19), the inner ring of the rotating disc bearing (19) is connected with the supporting plate (21) through bolts, the outer ring of the rotating disc bearing (19) is coaxially fixed with the sealing gasket (18) and the support plate (17), a circular hole for concentric cooperation with an external centering device is formed in the middle of the support plate (17), the gear shield (16) is fixed with the supporting plate (21) and is placed outside the rotating disc bearing (19) and the driving gear (20), the rock shield (14) is arranged on the support plate (17) and is placed outside the rock (15), and the sealing disc (13) is arranged on the top of the rock shield (14). The limiting mechanism includes a limiting assembly and a limiting frame, the number of the limiting assembly is two, the limiting assembly is symmetrically arranged on both sides of the support body, the limiting assembly is composed of a first limiting plate (3901), a second limiting plate (3902), a plurality of third limiting plates (3903), a limiting shaft (3904) and a limiting sleeve (3905), the bottom of the first limiting plate (3901) is connected with the support body through the limiting frame, the second limiting plate (3902) is square, a through hole is formed in the middle of the second limiting plate (3902), the limiting shaft (3904) passes through the through holes of the first limiting plate (3901) and the second limiting plate (3902), the both ends of the limiting shaft (3904) are fixed by the limiting sleeve (3905), the plurality of third limiting plates (3903) form a square to surround the second limiting plate (3902) in the center and are connected with the second limiting plate (3902) through bolts, and the third limiting plate (3903) is connected with the supporting plate (21) through bolts.

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