Test piece lifting and extending mechanism of self-balancing round hole wall friction and wear measurement platform

Abstract

The present invention discloses a lifting and extending mechanism for a test piece of a self-balancing circular hole wall friction and wear measurement platform, which includes a back plate. One side of the back plate is connected to the main body of the bracket, and on the other side of the back plate, two fourth connecting plates and two guide rail grooves are fixedly connected. Two guide rails are installed in the two guide rail grooves, and two sliders are arranged on each guide rail. The sliders are connected to the sliding table plate. The lifting drive assembly is arranged between the back plate and the sliding table plate. The lifting motor, the reducer and the adapter plate are connected in sequence and then fixedly connected to the first angular contact bearing seat. The first end of the lifting lead screw is rotatably connected to the first angular contact bearing seat through the first angular contact bearing. The second end of the lifting lead screw is fixedly connected to the second angular contact bearing arranged in the second angular contact bearing seat. The nut seat and the sliding table plate are fixedly connected; through replacing the test head or changing the surface structure of the test piece, the present invention can realize the measurement of the friction and wear performance between the test blocks with different sizes or different surface structures and the rock.

Description

Technical Field

[0001] The present invention relates to the technical field of friction pair wear testing, and particularly relates to a test piece lifting and extending mechanism for a self-balancing round hole wall friction and wear determination platform. Background Art

[0002] Frictional wear failure between downhole drill tools and rocks is one of the main modes leading to drill tool failure. Moreover, the frictional wear contact surface between the drill tool and the rock is often subjected to the combined action of various media such as gas, liquid, and solid, resulting in the diversification and complexity of the material wear behavior and damage mechanism. Therefore, it is particularly important to accurately detect the frictional wear characteristics and performance parameters of the drill tool and the hole wall based on simulating the actual working conditions.

[0003] Nowadays, the evaluation of the frictional wear performance of materials is mainly carried out by a friction and wear testing machine. The principle of various current friction and wear testing machines is as follows: using a clamping mechanism to clamp and fix the test piece, and then driving the clamping mechanism to reciprocate through a moving stage, so that a standard grinding head and the test piece are rubbed against each other. The above methods have the following deficiencies: First, since the test piece is only subjected to a unidirectional force, the clamping mechanism will inevitably deform under the action of the unidirectional force. In order to minimize the deformation as much as possible, most of them strengthen other components of the testing machine, which will not only increase the volume and weight of the testing machine, but also generate large vibrations during testing; Second, the test forms are mostly plane-to-plane or curve-to-plane, while the size of downhole drill tools is generally much larger than the size of the test pieces used in friction and wear testing machines, and the contact form between the drill tool and the rock is generally curve-to-curve; Third, the test piece is subjected to a frictional force and a clamping force that are parallel and have a certain length of force arm, and the clamping end of the test piece is unevenly stressed, which is also one of the main reasons for the poor accuracy of test data. These deficiencies will cause the existing friction and wear testing machines to be unable to well meet the testing requirements for the frictional wear performance between downhole drill tools and the wellbore wall. For this reason, a self-balancing round hole wall friction and wear determination platform has been invented. However, when the self-balancing round hole wall friction and wear determination platform is working, it requires a lifting and extending mechanism to cooperate with the measuring and rotating mechanism to enable the measuring platform to perform reciprocating motions to complete actions such as rotation with the rock sample, up and down linear motion, spiral up and down, and free telescopic adjustment of the test block and the pressure between the test block and the rock sample. Such a lifting and extending mechanism is an essential component for the self-balancing round hole wall friction and wear determination platform. Therefore, a test piece lifting and extending mechanism for the self-balancing round hole wall friction and wear determination platform is invented. Summary of the Invention

[0004] The purpose of the present invention is to provide a test piece lifting and extending mechanism for the self-balancing round hole wall friction and wear determination platform, which realizes the up and down movement through a lifting motor, a reducer, and a bearing, and realizes the free extension of the grinding head and determines the magnitude of the pushing force by a compressed medium to push a piston.

[0005] The test piece lifting and extending mechanism of the self-balancing round hole wall friction and wear measurement platform includes a back plate, guide rails, sliders, a sliding table plate, a lifting drive assembly, and a test assembly;

[0006] The lifting drive assembly includes a lifting motor, a reducer, an adapter plate, a first angular contact bearing seat, a first coupling, a lifting lead screw, a first angular contact bearing, a lifting nut, a nut seat, a second angular contact bearing seat, and a second angular contact bearing;

[0007] The test assembly includes a tension-compression-torsion sensor, a transition plate, a transmission rod, a support seat, an outer protective sleeve, a copper sleeve, a protective sleeve, a test joint, a piston, a piston cover, a test block, a tower spring, a sealing ring, and a pin;

[0008] One side of the back plate is connected to the main body of the bracket, and two fourth connecting plates and two guide rail grooves are fixedly connected to the other side of the back plate. Two guide rails are installed in the two guide rail grooves, and two sliders are arranged on each guide rail. The sliders are connected to the sliding table plate. The lifting drive assembly is arranged between the back plate and the sliding table plate. The lifting motor, the reducer, and the adapter plate are connected in sequence and then fixedly connected to the first angular contact bearing seat. The first coupling is arranged in the first angular contact bearing seat, and both sides of the first coupling are respectively connected to the reducer and the head end of the lifting lead screw. The head end of the lifting lead screw is rotationally connected to the first angular contact bearing seat through the first angular contact bearing. The first angular contact bearing seat and the second angular contact bearing seat are connected to the fourth connecting plate. The lifting lead screw passes through the lifting nut and the nut seat, and the end of the lifting lead screw is fixedly connected to the second angular contact bearing arranged in the second angular contact bearing seat. The lifting nut and the nut seat are connected, and the nut seat and the sliding table plate are fixedly connected;

[0009] The head end of the tension-compression-torsion sensor is connected to the fifth connecting plate arranged on the sliding table plate, and the end of the tension-compression-torsion sensor is sequentially connected to the transition plate and the transmission rod through bolts. The support seat, the outer protective sleeve, and the copper sleeve are sleeved outside the transmission rod and fixed on the sliding table plate. The number of support seats is four and they are concentric with the transmission rod. An outer protective sleeve and a copper sleeve are arranged between every two support seats. The transmission rod is a hollow structure with one side closed. A transverse guide hole is opened below the closed side of the transmission rod. The transmission rod is threadedly connected to the test joint. The protective sleeve is concentric with the transmission rod and is connected to the lower support seat through bolts. The test joint is provided with a T-shaped through hole, and a piston and a tower spring are symmetrically arranged in the through hole. A sealing ring is installed between the piston and the test joint, and the sealing ring makes the two sides of the piston not communicate with each other. The piston cover is connected to the test joint and makes the tower spring in a compressed state. The part of the piston extending out of the piston cover is fixedly connected to the test block through a pin. When compressed medium is injected into the transverse guide hole of the transmission rod, the symmetrically arranged pistons will each push a test block to extend out, and the two test blocks will contact the well wall simultaneously for testing. When the compressed medium is removed, the tower spring drives the piston and the test block to retract.

[0010] The beneficial effects of the present invention:

[0011] 1. Through the cooperation among various mechanisms, a test method of surface-to-surface between a larger-sized test block and a rock can be achieved.

[0012] 2. The contact pressure between the test block and the rock sample can be freely adjusted.

[0013] 3. By replacing the test joint or changing the surface structure of the test piece, the measurement of the friction and wear performance between test blocks of different sizes or different surface structures and the rock can be achieved.

[0014] 4. Two test blocks are in contact with the wellbore wall simultaneously for testing, which can ensure the balance of the entire system, prevent eccentric wear, and ensure the test accuracy. Description of the Drawings

[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention installed on a friction and wear measurement platform.

[0016] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the positions of the lifting drive assembly and the back plate in the present invention.

[0018] Figure 4 It is a schematic diagram of the positions of the test assembly and the slide table plate in the present invention.

[0019] Figure 5 It is a schematic diagram of the internal cross-section of the test joint in the present invention.

[0020] Back plate 5; Guide rail 6; Slide block 7; Slide table plate 8; Drag chain plate 9; Drag chain 10; Lifting drive assembly 11; Test assembly 12;

[0021] Fourth connecting plate 501; Guide rail groove 502;

[0022] Fifth connecting plate 801;

[0023] Lifting motor 1101; Reducer 1102; Adapter plate 1103; First angular contact bearing seat 1104; First coupling 1105; Lifting lead screw 1106; First angular contact bearing 1107; Lifting nut 1108; Nut seat 1109; Second angular contact bearing seat 1110; Second angular contact bearing 1111;

[0024] Tensile-compressive-torsional sensor 1201; Transition plate 1202; Transmission rod 1203; Support seat 1204; Outer protective sleeve 1205; Copper sleeve 1206; Sheath 1207; Test joint 1208; Piston 1209; Piston cover 1210; Test block 1211; Tower spring 1212; Sealing ring 1213; Pin 1214. Detailed Embodiments

[0025] Please refer to Figures 1 to 5 , the test piece lifting and extending mechanism of the self-balancing round hole wall friction and wear measurement platform, including a back plate 5, guide rails 6, sliders 7, a sliding table plate 8, a drag chain plate 9, a drag chain 10, a lifting drive assembly 11 and a test assembly 12;

[0026] The lifting drive assembly 11 includes a lifting motor 1101, a reducer 1102, an adapter plate 1103, a first angular contact bearing seat 1104, a first coupling 1105, a lifting lead screw 1106, a first angular contact bearing 1107, a lifting nut 1108, a nut seat 1109, a second angular contact bearing seat 1110 and a second angular contact bearing 1111;

[0027] The test assembly 12 includes a tension-compression-torsion sensor 1201, a transition plate 1202, a transmission rod 1203, a support seat 1204, an outer protective sleeve 1205, a copper sleeve 1206, a protective sleeve 1207, a test joint 1208, a piston 1209, a piston cover 1210, a test block 1211, a tower spring 1212, a sealing ring 1213 and a pin 1214;

[0028] One side of the back plate 5 is connected to the bracket body by bolts. On the other side of the back plate 5, two fourth connecting plates 501 and two guide rail grooves 502 are fixedly connected. Two guide rails 6 are installed in the two guide rail grooves 502 by bolts. Two sliders 7 are arranged on each guide rail 6. The sliders 7 are connected to the sliding table plate 8 by bolts. The lifting drive assembly 11 is arranged between the back plate 5 and the sliding table plate 8. One side of the drag chain plate 9 is connected to the sliding table plate 8 by bolts. The other side of the drag chain plate 9 is connected to the drag chain 10 by bolts. The other side of the drag chain 10 is fixed on the bracket body; the drag chain 10 protects the signal lines and power supply lines of the lifting motor 1101 and the tension-compression-torsion sensor 1201, and ensures that when the test block lifting mechanism performs the lifting task, the signal lines and power supply lines move accordingly;

[0029] The lifting motor 1101, the reducer 1102 and the adapter plate 1103 are connected in sequence and then fixedly connected to the first angular contact bearing seat 1104 by bolts. The first coupling 1105 is arranged inside the first angular contact bearing seat 1104, and both sides of the first coupling 1105 are respectively connected to the reducer 1102 and the head end of the lifting lead screw 1106. The head end of the lifting lead screw 1106 is rotatably connected to the first angular contact bearing seat 1104 through the first angular contact bearing 1107. The first angular contact bearing seat 1104 and the second angular contact bearing seat 1110 are connected to the fourth connecting plate 501 by bolts. The lifting lead screw 1106 passes through the lifting nut 1108 and the nut seat 1109, and the end of the lifting lead screw 1106 is fixedly connected to the second angular contact bearing 1111 arranged inside the second angular contact bearing seat 1110. The lifting nut 1108 and the nut seat 1109 are connected by bolts, and the nut seat 1109 is fixedly connected to the slide plate 8. Therefore, when the lifting motor 1101 is started, it will drive the lifting lead screw 1106 to rotate forward or backward. Through the thread fit, the lifting nut 1108 drives the nut seat 1109 to move, and further drives the slide plate 8 to move;

[0030] The head end of the tension-compression-torsion sensor 1201 is connected to the fifth connecting plate 801 provided on the sliding table plate 8. The tail end of the tension-compression-torsion sensor 1201 is sequentially connected to the transition plate 1202 and the transmission rod 1203 by bolts. The tension-compression-torsion sensor 1201 is used to measure the changes in tension, pressure, and torque during the test process. The support seats 1204, the outer protective sleeve 1205, and the copper sleeve 1206 are sleeved on the outside of the transmission rod 1203 and fixed on the sliding table plate 8. The number of support seats 1204 is four, which are concentric with the transmission rod 1203. An outer protective sleeve 1205 and a copper sleeve 1206 are arranged between every two support seats 1204 to keep the transmission rod 1203 vertical. The transmission rod 1203 is a hollow structure with one side closed. A transverse guide hole is opened below the closed side of the transmission rod 1203. The transmission rod 1203 is threadedly connected to the test joint 1208. The protective sleeve 1207 is concentric with the transmission rod 1203. The protective sleeve 1207 is connected to the lower support seat 1204 by bolts. The protective sleeve 1207 can protect the connection between the transmission rod 1203 and the test joint 1208. A T-shaped through hole is opened in the test joint 1208. Pistons 1209 and tower springs 1212 are symmetrically arranged in the through hole. A sealing ring 1213 is installed between the piston 1209 and the test joint 1208. The sealing ring 1213 makes the two sides of the piston not communicate with each other. The piston cover 1210 is connected to the test joint 1208 by bolts and makes the tower spring 1212 in a compressed state. The part of the piston 1209 extending out of the piston cover 1210 is fixedly connected to the test block 1211 by a pin 1214. When compressed medium is injected into the transverse guide hole of the transmission rod 1203, the symmetrically arranged pistons 1209 will each push a test block 1211 to extend out. The two test blocks 1211 are simultaneously in contact with the wellbore wall and perform tests, forming a self-balance of force in the test part, ensuring the balance and stability of the entire system, preventing eccentric wear from occurring, and improving the test accuracy. When the compressed medium is removed, the tower spring 1212 drives the piston 1209 and the test block 1211 to retract.

[0031] Furthermore, different test joints 1208 can be replaced according to the size and shape of the test blocks 1211.

[0032] Furthermore, different types of rocks 15 or other test materials can be replaced for testing.

[0033] The working principle and usage process of the present invention:

[0034] Test process:

[0035] The lifting motor 1101 rotates forward, driving the lifting lead screw 1106 to rotate. Through the thread fit between the lifting lead screw 1106 and the lifting nut 1107, the lifting nut 1107 moves downward. Since the lifting nut 1107 is fixedly connected to the nut seat 1108, the nut seat 1108 is fixedly connected to the slide plate 8, and the test assembly is installed on the slide plate 8, the test assembly 12 will move downward as a whole. When the test connector 1208 and the test block 1211 extend into the appropriate position in the through hole in the rock, stop the operation of the lifting motor 1101;

[0036] Inject the compressed medium into the transmission rod 1203, so that the symmetrically arranged pistons 1209 will each push a test block 1211 to extend. The two test blocks 1211 contact the wall of the circular hole in the rock at the same time and conduct tests. The tensile pressure and torque changes during the test are measured by the tension-compression-torsion sensor 1201;

[0037] At this time, if the lifting motor 1101 rotates forward and reverse alternately, reciprocating motion tests can be achieved; if the rotary motor 22 is started and the lifting motor 1101 is not started, rotary motion tests can be achieved; if the rotary motor 22 is started and the lifting motor 1101 is started at the same time, reciprocating and rotary motion tests can be achieved;

[0038] After the test is completed, remove the compressed medium. The tower spring 1212 resets and drives the piston 1209 and the test block 1211 to retract. The lifting motor 1101 rotates in reverse, making the test assembly 12 move upward as a whole and return to the initial position.

Claims

1. The test piece lifting and extending mechanism of the self-balancing round hole wall friction and wear measurement platform, characterized in that: It includes a backplane (5), guide rails (6), sliders (7), a slide table plate (8), a lifting drive assembly (11) and a testing assembly (12); The lifting drive assembly (11) includes a lifting motor (1101), a speed reducer (1102), an adapter plate (1103), a first angular contact bearing housing (1104), a first coupling (1105), a lifting lead screw (1106), a first angular contact bearing (1107), a lifting nut (1108), a nut seat (1109), a second angular contact bearing housing (1110) and a second angular contact bearing (1111); The testing assembly (12) includes a tension-compression-torsion sensor (1201), a transition plate (1202), a transmission rod (1203), a support seat (1204), an outer protective sleeve (1205), a copper sleeve (1206), a protective sleeve (1207), a testing joint (1208), a piston (1209), a piston cover (1210), a testing block (1211), a tower spring (1212), a sealing ring (1213) and a pin (1214); One side of the backplane (5) is connected to the bracket body. On the other side of the backplane (5), two fourth connection plates (501) and two guide rail grooves (502) are fixedly connected. Two guide rails (6) are installed in the two guide rail grooves (502). Two sliders (7) are arranged on each guide rail (6). The sliders (7) are connected to the slide table plate (8). The lifting drive assembly (11) is arranged between the backplane (5) and the slide table plate (8). The lifting motor (1101), the speed reducer (1102) and the adapter plate (1103) are connected in sequence and then fixedly connected to the first angular contact bearing housing (1104). The first coupling (1105) is arranged in the first angular contact bearing housing (1104). And both sides of the first coupling (1105) are respectively connected to the speed reducer (1102) and the head end of the lifting lead screw (1106). The head end of the lifting lead screw (1106) is rotationally connected to the first angular contact bearing housing (1104) through the first angular contact bearing (1107). The first angular contact bearing housing (1104) and the second angular contact bearing housing (1110) are connected to the fourth connection plate (501). The lifting lead screw (1106) passes through the lifting nut (1108) and the nut seat (1109). The end of the lifting lead screw (1106) is fixedly connected to the second angular contact bearing (1111) arranged in the second angular contact bearing housing (1110). The lifting nut (1108) and the nut seat (1109) are connected. The nut seat (1109) and the slide table plate (8) are fixedly connected; The head end of the tension-compression-torsion sensor (1201) is connected to the fifth connecting plate (801) provided on the sliding table plate (8). The tail end of the tension-compression-torsion sensor (1201) is sequentially bolted to the transition plate (1202) and the transmission rod (1203). The support seat (1204), the outer protective sleeve (1205) and the copper sleeve (1206) are sleeved on the outside of the transmission rod (1203) and fixed on the sliding table plate (8). The number of support seats (1204) is four, which are concentric with the transmission rod (1203). An outer protective sleeve (1205) and a copper sleeve (1206) are arranged between every two support seats (1204). The transmission rod (1203) is a hollow structure with one side closed. A transverse guide hole is opened below the closed side of the transmission rod (1203). The transmission rod (1203) is threadedly connected to the test joint (1208). The protective sleeve (1207) is concentric with the transmission rod (1203). The protective sleeve (1207) is connected to the lower support seat (1204) by bolts. The test joint (1208) is provided with a T-shaped through hole. A piston (1209) and a tower spring (1212) are symmetrically arranged in the through hole. A sealing ring (1213) is installed between the piston (1209) and the test joint (1208). The sealing ring (1213) makes the two sides of the piston not communicate with each other. The piston cover (1210) is connected to the test joint (1208) and makes the tower spring (1212) in a compressed state. The part of the piston (1209) extending out of the piston cover (1210) is fixedly connected to the test block (1211) by a pin (1214). When compressed medium is injected into the transverse guide hole of the transmission rod (1203), the symmetrically arranged pistons (1209) will each push a test block (1211) to extend out. The two test blocks (1211) are in contact with the wellbore at the same time and conduct tests. When the compressed medium is removed, the tower spring (1212) drives the piston (1209) and the test block (1211) to retract.

2. The test piece lifting and extending mechanism of the self-balancing round hole wall friction and wear measurement platform according to claim 1, characterized in that: It further includes a drag chain plate (9) and a drag chain (10). One side of the drag chain plate (9) is bolted to the sliding table plate (8), and the other side of the drag chain plate (9) is bolted to the drag chain (10). The other side of the drag chain (10) is fixed on the support body.

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