CN115791063A - Drill fatigue impact damage tester - Google Patents
Drill fatigue impact damage tester Download PDFInfo
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- CN115791063A CN115791063A CN202310050224.2A CN202310050224A CN115791063A CN 115791063 A CN115791063 A CN 115791063A CN 202310050224 A CN202310050224 A CN 202310050224A CN 115791063 A CN115791063 A CN 115791063A
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Abstract
The invention discloses a drill bit fatigue impact damage testing machine in the technical field of impact damage testing, which comprises a base and a data acquisition and processing system, wherein the base is fixedly connected with a support and a sample clamp, the top of the support is provided with a turning cylinder, the upper end and the lower end of the turning cylinder are respectively and rotatably provided with a driving shaft, a driving assembly for driving the driving shaft to rotate and a driven shaft vertically and slidably connected with the turning cylinder, the outer wall of the driving shaft is provided with a cam groove, the top of the driven shaft is fixedly connected with a supporting leg, the top of the supporting leg is slidably connected with a driven rolling pin, the end part of the driven rolling pin extends into the cam groove and is fixedly connected with a yielding spring between the supporting leg, the bottom of the driven shaft is provided with an impact adjusting cylinder driven by the driven shaft, the impact adjusting cylinder is provided with threads, and two ends of the impact adjusting cylinder are respectively provided with an adjusting ring; the impact process with different frequencies and different energies in the actual drilling process can be simulated, the impact frequency and the impact energy can be accurately controlled, and the energy can reach a certain level.
Description
Technical Field
The invention relates to the technical field of impact damage testing, in particular to a fatigue impact damage testing machine for a drill bit.
Background
Polycrystalline Diamond (PDC) bits are widely used in underground drilling processes including the field of oil and gas exploration, the main working components of the PDC bits are PDC bit teeth mounted on the crown portions of the PDC bits, the mechanical properties of the PDC bit teeth influence the service life of the PDC bits to a great extent, and further the time cost and the economic cost of the drilling process can be greatly influenced. The mechanical performance indexes of the PDC drill bit teeth mainly comprise: impact resistance, wear resistance, thermal stability, etc., wherein impact resistance directly affects the service life of the PDC bit teeth.
The current method for impact resistance testing is to use a conventional drop hammer impact tester and a pendulum hammer impact tester for testing. In the production process of the PDC drill bit, the impact resistance of the PDC drill bit teeth is often tested by drop hammer impact. The principle of drop hammer impact test is that an impact target is dropped on a PDC drill bit tooth at a certain height, the impact resistance of a sample is evaluated by calculating the kinetic energy generated at the height, and after each impact, if the sample is not damaged, a larger height is set for impact until the sample is damaged. This test method gives the conventional impact resistance of the sample.
In actual drilling engineering, because the rotating speed of the PDC drill bit is high, when extremely high heterogeneity (stratum rock soil contains a large amount of hard phases which are similar to concrete doped with limestone pebbles) exists in stratum, the PDC drill bit can be impacted by the high frequency of the hard phases in the stratum rock soil in the rotary drilling process, so that a plurality of scholars find the phenomenon at present, but due to the lack of experimental equipment, indoor experimental tests cannot be carried out. According to common oil drilling parameters, the impact frequency can be calculated to be approximately 1Hz to 10Hz, and the specific impact frequency is influenced by the content of the inhomogeneous hard phase in the stratum. Taking rotary disc drilling as an example, when the drill bit is impacted by only one hard rock per revolution downhole, the impact frequency is 1Hz. Because the impact energy is small, but the frequency is high, the conventional drop hammer impact experiment cannot simulate the high-frequency low-energy impact process of the actual drilling process, besides the need of providing a high-frequency impact environment, the impact frequency and the impact energy also need to be accurately controlled, and the energy is enabled to reach a certain level, which cannot be well achieved by the existing equipment at present.
Disclosure of Invention
In view of the above problems, the present invention is directed to a novel testing apparatus, which is capable of creating an impact environment with controllable frequency and energy, and testing a PDC bit tooth to simulate and evaluate the service life of a PDC bit tooth sample under a working condition of actually drilling into an inhomogeneous formation. The invention solves the problem that the current PDC bit tooth impact test equipment cannot create higher impact frequency and accurately control energy.
In order to achieve the purpose, the invention provides the following technical scheme: including base and data acquisition processing system, base fixedly connected with support and sample anchor clamps, the sample anchor clamps are used for centre gripping impact sample, a diversion section of thick bamboo is installed at the support top, both ends rotate respectively about the diversion section of thick bamboo be provided with the driving shaft, be used for driving shaft pivoted drive assembly and with the vertical sliding connection's of diversion section of thick bamboo driven shaft, the cam groove has been seted up to the driving shaft outer wall, driven shaft top fixedly connected with stabilizer blade, stabilizer blade top sliding connection have driven roll pin, driven roll pin tip extend to in the cam groove and with the stabilizer blade between the fixedly connected with spring of stepping down, driven shaft bottom is installed by driven shaft drive's impulsive force regulation section of thick bamboo, have screw thread and respectively install an adjustable ring at both ends on the impulsive force regulation section of thick bamboo, two by last to be equipped with dynamometer, application of force spring, impact head in the impulsive force regulation section of thick bamboo under the adjustable ring, change the compression volume of application of force spring through rotatory two adjustable rings and adjust the final pressure of exerting on the impact head to when impacting the sample, guarantee that impact energy is controllable.
As a further scheme of the invention, the direction-changing cylinder comprises a cylinder cover, a cylinder body, a sleeve ring for locking the cylinder cover, the cylinder body and a locking assembly, wherein the bottom of the cylinder cover is fixedly connected with the sleeve ring for extruding the driven rolling pins to enable the driven rolling pins to approach each other, the driving shaft comprises a shaft body and a replaceable cam body, the shaft body is clamped with a limiting part for limiting the shaft body to move up and down, the clamping position of the limiting part and the shaft body is semicircular and has elasticity, the limiting part is connected with the cylinder cover in a sliding manner, and a clamping assembly is arranged between the cam body and the shaft body.
As a further scheme of the invention, the clamping assembly comprises a clamping block connected with the cam body in a sliding manner, and a pushing block fixedly connected with the inside of the shaft body and used for pushing the clamping block to move, a trigger part is vertically connected with the inside of the shaft body in a sliding manner, the trigger part is L-shaped, the top of the trigger part is positioned outside the shaft body, the pushing block and the clamping block are both fixedly connected with a return spring, and the return springs are respectively fixedly connected with the shaft body and the cam body.
As a further scheme of the invention, the locking assembly comprises a locking pin fixedly connected with the barrel cover and a locking sleeve fixedly connected with the barrel body, and a locking nut is in threaded connection between the locking sleeve and the locking pin.
As a further scheme of the invention, the top of the bracket is fixedly connected with a clamping groove, the outer wall of the barrel is fixedly connected with a clamping piece clamped with the clamping groove, the clamping piece is fixedly connected with a clamping spring, the top of the clamping spring is fixedly connected with a sliding plate fixedly connected with the barrel cover, and the sliding plate is connected with a motor frame in a sliding manner.
As a further scheme of the invention, the driving assembly comprises a driving motor arranged on a motor frame, the top of the motor frame is rotatably connected with a driving wheel and a driven wheel, the driving wheel and the driven wheel are driven by a belt and are respectively sleeved on an output shaft of the driving motor and a driving shaft, a sliding groove is formed in the side wall of the top of the driving shaft, and the inner wall of the driven wheel is fixedly connected with a sliding key.
As a further scheme of the invention, the outer walls of the impact head and the dynamometer are respectively and fixedly connected with a lug which is in sliding connection with the impact force adjusting cylinder, and the lugs are positioned between the adjusting rings.
As a further scheme of the invention, a rotary centering block and a linear motion centering block are respectively clamped at the top of the cylinder cover and the bottom of the cylinder body, the adjacent ends of the rotary centering block and the linear motion centering block are both square, and the linear motion centering block is vertically connected with the driven shaft in a sliding manner through a key.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, a specific cylindrical cam mechanical structure is used for converting the motion of rotating around a shaft into reciprocating motion along the axial direction, namely, a driving shaft rotates, so that a cam groove on the side wall of the driving shaft rotates, a rolling pin in the cam groove moves up and down along the cam groove, and the rolling pin drives a driven shaft to reciprocate up and down through a support leg, so that continuous impact test is realized;
2. according to the invention, an axial travel distance can be set by controlling the structural size of the cam, and the cam is matched with a motor capable of controlling the rotating speed, so that the frequency of axial reciprocating motion can be accurately calculated through the rotating speed, the rotating speed grade can be changed, the working frequency of equipment can be changed, different frequency impact processes of an actual drilling process can be simulated, the impact frequency can be accurately controlled, and the energy can reach a certain level;
3. according to the invention, the compression amount of the force application spring is changed by rotating the two adjusting rings to adjust the pressure finally applied to the impact head, different pressures can be adjusted to be applied to the impact head according to requirements, the deformation amount of the force application spring after the impact head contacts an impact sample is designed, and further, the force applied to the impact sample is considered to be a constant in the process of impact contact, and the impact energy received by the impact sample at each time can be preliminarily obtained by calculating the stroke of the impact head and the force given by the dynamometer, so that different energy impact processes in the actual drilling process can be simulated, the impact energy can be accurately controlled, and the energy can reach a certain level.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;
FIG. 4 is a schematic cross-sectional view of an explosive structure at the joint of the bracket and the turning cylinder according to the present invention;
FIG. 5 is a schematic sectional view of the cross-sectional structure of the joint between the cylinder and the driven shaft according to the present invention;
FIG. 6 is an enlarged view of the structure at B in FIG. 5 according to the present invention;
FIG. 7 is a schematic view of a connection structure of a driven shaft according to the present invention;
FIG. 8 is a schematic view of a connection structure of the cover of the present invention;
FIG. 9 is an exploded perspective view of the connection of the shafts according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a base; 2. a support; 21. a clamping groove; 3. a turning cylinder; 31. a cylinder cover; 32. a cylinder body; 33. a collar; 34. a clamping piece; 35. clamping a spring; 36. a slide plate; 37. a motor frame; 5. rotating the centering block; 6. a drive shaft; 61. a cam slot; 62. a shaft body; 63. a cam body; 64. a limiting member; 7. a driven shaft; 71. a support leg; 73. a yielding spring; 8. linearly moving the centering block; 9. an impact force adjusting cylinder; 91. a bump; 10. an adjusting ring; 11. a sample holder; 12. a driven rolling pin; 14. a force gauge; 15. a force application spring; 16. an impact head; 17. impacting the sample; 18. a clamping block; 181. a push block; 182. a trigger; 183. a return spring; 191. a locking pin; 192. a locking sleeve; 193. a lock nut; 20. a drive motor; 201. a driving wheel; 202. a driven wheel; 203. and (6) sliding the key.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 9, the present invention provides a technical solution: the impact energy control device comprises a base 1 and a data acquisition and processing system, wherein the base 1 is fixedly connected with a support 2 and a sample clamp 11, the sample clamp 11 is used for clamping an impact sample 17, the top of the support 2 is provided with a turning cylinder 3, the upper end and the lower end of the turning cylinder 3 are respectively and rotatably provided with a driving shaft 6, a driving assembly used for driving the driving shaft 6 to rotate and a driven shaft 7 vertically and slidably connected with the turning cylinder 3, the outer wall of the driving shaft 6 is provided with a cam groove 61, the top of the driven shaft 7 is fixedly connected with a support leg 71, the top of the support leg 71 is slidably connected with a driven rolling pin 12, the end part of the driven rolling pin 12 extends into the cam groove 61 and is fixedly connected with a yielding spring 73 between the support legs 71, the bottom of the driven shaft 7 is provided with an impact force adjusting cylinder 9 driven by the driven shaft 7, the impact force adjusting cylinder 9 is provided with threads, two ends are respectively provided with an adjusting ring 10, a dynamometer 14, an application spring 15 and an impact head 16 are arranged in the impact force adjusting cylinder 9 from top to bottom between the two adjusting rings 10, the compression amount of the application spring 15 is changed to adjust the pressure finally applied to the impact head 16, and therefore, when the impact sample 17 is contacted with the impact energy;
the equipment can be mainly divided into two parts according to a functional module, the first part is a transmission part, the motion of rotating around a shaft is converted into reciprocating motion along the axial direction by using a specific cylindrical cam mechanical structure, namely, the driving shaft 6 rotates to enable a cam groove 61 on the side wall of the driving shaft 6 to rotate, a rolling pin 12 in the cam groove 61 moves up and down along the cam groove 61, the rolling pin 12 drives a driven shaft 7 to reciprocate up and down through a supporting leg 71, an axial advancing distance can be set through controlling the size of the cam structure, the rotating speed can be controlled by matching with a motor, the frequency of the axial reciprocating motion can be accurately calculated through the rotating speed, the rotating speed grade is changed, the working frequency of the equipment can be changed, and the calculation formula of the impact frequency is as follows:
。
wherein F is the impact frequency of the equipment and has the unit of Hz; r is the main shaft rotating speed of the equipment, and the unit is rev/s; n is the number of times of the up-and-down stroke of the impact head 16 per rotation of the main shaft of the equipment, and the unit is 1/rev.
The second key component is the energy control system. In the conventional drop hammer impact test process, the strength grade of a test sample is judged by calculating the gravitational potential energy of the whole hammer head, namely, all the gravitational potential energy of the hammer body acts on the sample. Thus, the device uses one force application spring 15 and one force gauge 14, which can only adjust the force magnitude, to specify and measure the energy level of a single impact. In order to be able to accurately approximate the actual energy value, it is necessary to shorten the axial travel distance of the first part of the device as much as possible, in which case the magnitude of the deformation of the force-exerting spring 15 during contact with the impact specimen 17 can be neglected; meanwhile, the deformation amount of the force application spring 15 after the impact head 16 contacts the impact sample 17 is designed, and further, in the process of impact contact, the force applied to the impact sample is considered to be constant, and the impact energy received by impacting the sample 17 each time can be obtained preliminarily by calculating the stroke of the impact head 16 and the force given by the dynamometer 14. The calculation formula is as follows:
。
wherein E is impact energy, and the unit is J; f is the average force of the force application spring 15 measured by the load cell 14 and is given in N; s is the stroke of the equipment impact head 16 in reciprocating motion, and the unit is m; h is the distance between the contact point of the impact sample 17 and the impact head 16 and the highest point of the stroke of the impact head 16, the unit is m, and h is smaller than S.
The equipment of the invention mainly comprises: equipment major structure, data acquisition processing system. The main structure of the device comprises a base 1, a sample clamp 11, a turning cylinder 3, a driving shaft 6, a driven shaft 7, a cam groove 61, a support leg 71, a driven rolling pin 12, a yielding spring 73, an impact force adjusting cylinder 9, an adjusting ring 10, a dynamometer 14, an application spring 15 and an impact head 16. The data acquisition system acquires data through the dynamometer 14;
in the main structure of the equipment, a base 1 and a bracket 2 mainly play a role of fixing and supporting a working main body part; the sample holder 11 is used for fixing the impact sample 17 to be tested; the driving shaft 6 in the direction-changing cylinder 3 rotates, the driving shaft 6 is of a cam structure, driven rolling pins 12 are arranged on two sides of a driven shaft 7, when the driving shaft 6 rotates, the driven rolling pins 12 roll in the cam grooves 61 to cause the support legs 71 to reciprocate up and down, an impact force adjusting cylinder 9 is arranged at the lower end of the driven shaft 7, and the impact force adjusting cylinder 9 is used for adjusting the impact energy. The impact force adjusting cylinder 9 is provided with threads, two ends of each thread are respectively provided with an adjusting ring 10, and a dynamometer 14, a force application spring 15 and an impact head 16 are arranged in the sleeve from top to bottom between the two adjusting rings 10. Through rotating two adjustable rings 10, change the distance between two adjustable rings 10, change the compressive capacity of application of force spring 15 and adjust the pressure that finally exerts on impact head 16 to when impact head 16 contacts impact sample 17, guarantee that impact energy is controllable, can accurate control impact frequency and impact energy, and impact energy size reaches certain level at every turn, and impact energy can carry out random adjustment, thereby simulate out different service environment.
As an example of an application: the preset impact force of the dynamometer 14 is set to be 5000N, the up-down stroke S of the impact head 16 is set to be 20mm, the distance h between the impact sample 17 and the highest point of the stroke of the impact head 16 is 10mm, the back-and-forth movement of the driven shaft 7 caused by each rotation of the driving shaft 6 is designed to be 4 times, and the rotation speed of the driving shaft is 20 circles per second. It can be seen that the sample 17 receives about 50J of impact energy per impact and the impact frequency is 80Hz.
As an example of an application: the preset impact force of the dynamometer 14 is set to be 2000N, the up-down stroke S of the impact head 16 is set to be 10mm, the distance h between the impact sample 17 and the highest point of the stroke of the impact head 16 is 5mm, the back-and-forth movement of the driven shaft 7 caused by each rotation of the driving shaft 6 is designed to be 2 times, and the rotating speed of the driving shaft 6 is 10 circles per second. It can be seen that the sample 17 receives about 10J of impact energy per impact and the impact frequency is 20Hz.
As an example of an application: the preset impact force of the dynamometer 14 is set to be 100N, the up-down stroke S of the impact head 16 is set to be 10mm, the distance h from the impact sample 17 to the highest point of the stroke of the impact head 16 is set to be 9mm, the back-and-forth movement of the driven shaft 7 caused by each rotation of the driving shaft 6 is designed to be 2 times, and the rotating speed of the driving shaft 6 is 1 circle per second. It can be seen that the sample 17 receives an impact energy of about 0.1J per impact and an impact frequency of 2Hz.
Preferred examples of applications are: in order to reduce the test error caused by the contact time of the impact head 16 and the impact sample 17 as much as possible, the up-down stroke of the impact head 16 is set to be not more than 10mm, the distance between the impact sample 17 and the highest point of the stroke of the impact head 16 is not less than 5mm, and the impact frequency of the impact sample 17 is designed to be not less than 50Hz, so that the set impact force is approximate to the impact force applied to the impact sample 17 in the actual impact process.
In the above embodiment, the stress of the dynamometer 14, the up-down stroke of the impact head 16, the distance from the impact sample 17 to the highest point of the stroke of the impact head 16, the impact frequency per revolution of the driving shaft 6, the rotating speed of the driving shaft 6 and the like are controllable parameters, so that the expected practical design requirements of the equipment can be met, and the control of the frequency and energy of the impact process is completed.
The device operation method comprises the following steps:
s1, opening an impact force measuring system and monitoring a dynamometer 14;
s2, mounting the tested impact sample 17 on a sample clamp 11 for fixing;
s3, manually rotating the driving shaft 6 to enable the impact head 16 to be located at the top end of the stroke;
s4, rotationally adjusting the two adjusting rings 10; firstly, rotating the lowest adjusting ring 10 to ensure that an impact head 16 keeps a certain fixed distance from the upper surface of a test sample 17;
s5, keeping the impact head 16 in contact with the upper surface of the test sample 17, fixing the lower adjusting ring 10, then downwards rotating the upper adjusting ring 10 for controlling the position of the dynamometer 14, and adjusting the length of the force application spring 15 and the position of the dynamometer 14 to keep the stress of the dynamometer 14 at an experimental preset value;
s6, opening the dynamometer 14 to record impact force, switching on a power supply to enable the motor to drive the equipment to rotate, and starting impact testing until the sample 17 reaches a preset damage condition;
and S7, extracting impact force data of the impact force data acquisition system, and calculating and recording the total impact energy value of the test sample 17 in the whole process.
As a further scheme of the present invention, the direction-changing cylinder 3 includes a cylinder cover 31, a cylinder body 32, a sleeve ring 33 for locking the cylinder cover 31 and the cylinder body 32, and a locking assembly, the bottom of the cylinder cover 31 is fixedly connected with the sleeve ring 33 for pressing the driven rolling pins 12 to make the driven rolling pins 12 approach to each other, the driving shaft 6 includes a shaft body 62 and a replaceable cam body 63, the shaft body 62 is clamped with a limiting piece 64 for limiting the shaft body 62 to move up and down, the limiting piece 64 is clamped with the shaft body 62 to form a semicircle shape and has elasticity, the limiting piece 64 is slidably connected with the cylinder cover 31, and a clamping assembly is arranged between the cam body 63 and the shaft body 62;
in the use process, the barrel cover 31 and the barrel body 32 are fixed through the locking assembly, when the impact with different frequencies needs to be tested, the limiting piece 64 is firstly separated from the shaft body 62, so that the shaft body 62 can move up and down, then the locking assembly is cancelled to lock the barrel cover 31 and the barrel body 32, the barrel cover 31 drives the lantern ring 33 to move up, after the lantern ring 33 is separated from the driven rolling pin 12, the yielding spring 73 pushes the driven rolling pin 12 to move outwards, so that the driven rolling pin 12 moves out of the cam groove 61, and the cam body 63 is not influenced when being taken out; when the distance between the lantern ring 33 and the barrel 32 is enough, the limiting of the clamping assembly on the cam body 63 is cancelled, the cam body 63 is taken out, the cam body 63 with different frequencies is replaced, the clamping assembly is used for connecting the replaced cam body 63 with the shaft body 62, then the barrel cover 31 is reset, the lantern ring 33 at the bottom of the barrel cover 31 presses the positioning assembly downwards, the positioning assembly is separated from the driven shaft 7, and the influence of the positioning assembly on the rotation of the driven shaft 7 is avoided.
As a further scheme of the present invention, the clamping assembly includes a clamping block 18 slidably connected to the cam body 63, and a pushing block 181 fixedly connected to the inside of the shaft body 62 and used for pushing the clamping block 18 to move, a triggering member 182 is vertically slidably connected to the inside of the shaft body 62, the triggering member 182 is L-shaped, the top of the triggering member is located outside the shaft body 62, the pushing block 181 and the clamping block 18 are both fixedly connected to a return spring 183, and the return spring 183 is respectively fixedly connected to the shaft body 62 and the cam body 63;
in the process of replacing the cam body 63 with different frequencies, after the barrel cover 31 moves to the top end, the cam body 63 is pulled upwards through the shaft body 62, when the trigger piece 182 contacts the barrel cover 31, the trigger piece 182 stops moving upwards, the push block 181 and the clamping block 18 continue to ascend along with the shaft body 62, the trigger piece 182 extrudes the push block 181, the push block 181 stretches the reset spring 183 fixedly connected with the push block 183 and pushes the clamping block 18 out of the shaft body 62, after the clamping block 18 moves out of the shaft body 62, the shaft body 62 can be separated from the cam body 63, so that the cam body 63 can be replaced randomly, the test machine can change the up-and-down stroke times of the impact head 16 in each rotation of the driving shaft 6, the single test machine can provide different impact frequencies, and the test cost of the drill fatigue impact test is greatly reduced; the mounting process is the reverse of the dismounting process and will not be described in detail here.
As a further scheme of the present invention, the locking assembly comprises a locking pin 191 fixedly connected with the cylinder cover 31 and a locking sleeve 192 fixedly connected with the cylinder body 32, and a locking nut 193 is connected between the locking sleeve 192 and the locking pin 191 through threads;
in the using process, the locking nut 193 is screwed off, the barrel cover 31 is moved upwards, the barrel cover 31 drives the locking pin 191 to ascend and separate from the locking sleeve 192, otherwise, the barrel cover 31 is moved downwards, the locking pin 191 is inserted into the locking sleeve 192, and the locking nut 193 is screwed on, so that the barrel cover 31 can be separated from the barrel body 32 and connected, and the cam body 63 can be conveniently replaced in the follow-up process.
As a further scheme of the invention, the top of the bracket 2 is fixedly connected with a clamping groove 21, the outer wall of the cylinder 32 is fixedly connected with a clamping piece 34 clamped with the clamping groove 21, the clamping piece 34 is fixedly connected with a clamping spring 35, the top of the clamping spring 35 is fixedly connected with a sliding plate 36 fixedly connected with the cylinder cover 31, and the sliding plate 36 is slidably connected with a motor frame 37;
in the using process, the connecting between the turning cylinder 3 and the bracket 2 can be realized through the matching of the clamping groove 21 and the clamping piece 34, the worn base 1 is convenient to replace, and the using cost of the testing machine is reduced; after the locking assembly cancels the locking of the cylinder 32 and the cylinder cover 31, the clamping spring 35 in a compressed state stretches, so that the sliding plate 36 drives the cylinder cover 31 to move upwards without being held by a worker, and the worker can conveniently pull the driving shaft 6 to move upwards; the sliding plate 36 moves up and down to enable the sliding plate to vertically slide along the motor frame 37, the motor frame 37 plays a role in guiding the sliding plate 36, and the barrel cover 31 and the barrel 32 are prevented from being deviated, so that the difficulty of replacing the cam body 63 is increased.
As a further scheme of the invention, the driving assembly comprises a driving motor 20 mounted on a motor frame 37, the top of the motor frame 37 is rotatably connected with a driving wheel 201 and a driven wheel 202, the driving wheel 201 and the driven wheel 202 are driven by a belt and respectively sleeved on an output shaft of the driving motor 20 and a driving shaft 6, a sliding groove is formed in the side wall of the top of the driving shaft 6, and a sliding key 203 is fixedly connected to the inner wall of the driven wheel 202;
in the use, driving motor 20 drives driving wheel 201 to rotate through the output shaft, driving wheel 201 drives driven wheel 202 to rotate through the belt, driven wheel 202 drives driving shaft 6 to rotate through sliding key 203, the rotation of driving shaft 6 is driven, the test machine is enabled to work, the sliding groove in the side wall of driving shaft 6 is matched with sliding key 203 on the inner wall of driven wheel 202, driven wheel 202 can drive driving shaft 6 to rotate, the up-and-down movement of driving shaft 6 is not influenced, sliding key 203 can drive driving shaft 6 to rotate through the sliding groove, and the up-and-down sliding of driving shaft 6 is not influenced.
As a further scheme of the invention, the outer walls of the impact head 16 and the dynamometer 14 are respectively fixedly connected with a lug 91 which is in sliding connection with the impact force adjusting cylinder 9, and the lugs 91 are both positioned between the adjusting rings 10;
in the use process, the adjusting ring 10 is rotated, the adjusting ring 10 drives the impact head 16 and the dynamometer 14 to move through the lug 91, when the adjusting ring 10 at the upper part is rotated, only the compression amount of the force application spring 15 is adjusted, and when the adjusting ring 10 at the lower part is rotated, the compression amount of the force application spring 15 is adjusted, and the distance from the impact head 16 to the impact sample 17 is also adjusted.
As a further scheme of the invention, the top of the cylinder cover 31 and the bottom of the cylinder body 32 are respectively clamped with a rotary centering block 5 and a linear motion centering block 8, the adjacent ends of the rotary centering block 5 and the linear motion centering block 8 are both square, and the linear motion centering block 8 is vertically connected with the driven shaft 7 in a sliding manner through a key;
in the using process, the linear motion centering block 8 limits the rotation of the driven shaft 7 through keys, so that the situation that the driven shaft 7 rotates along with the driving shaft 6 to cause the test machine to be incapable of performing impact test is avoided.
Claims (8)
1. Drill bit fatigue impact damage test machine, including base (1) and data acquisition processing system, its characterized in that: the base (1) is fixedly connected with a bracket (2) and a sample clamp (11), the sample clamp (11) is used for clamping an impact sample (17), the top of the bracket (2) is provided with a turning cylinder (3), the upper end and the lower end of the turning cylinder (3) are respectively and rotatably provided with a driving shaft (6), a driving component for driving the driving shaft (6) to rotate and a driven shaft (7) vertically connected with the turning cylinder (3) in a sliding way, the outer wall of the driving shaft (6) is provided with a cam groove (61), the top of the driven shaft (7) is fixedly connected with a supporting leg (71), the top of the supporting leg (71) is connected with a driven rolling pin (12) in a sliding way, the end part of the driven rolling pin (12) extends into the cam groove (61) and is fixedly connected with a yielding spring (73) between the driven rolling pin and the supporting leg (71), the bottom of the driven shaft (7) is provided with an impact force adjusting cylinder (9) driven by the driven shaft (7), the impact adjusting cylinder (9) is provided with threads, two ends of the impact adjusting cylinder are respectively provided with an adjusting ring (10), a dynamometer (14), a force application spring (15) and an impact head (16) are arranged in the impact adjusting cylinder (9) from top to bottom between the two adjusting rings (10), the pressure finally exerted on the impact head (16) is adjusted by rotating the two adjusting rings (10) to change the compression of the force spring (15).
2. The drill bit fatigue impact damage testing machine of claim 1, characterized in that: the turning cylinder (3) comprises a cylinder cover (31), a cylinder body (32) and a locking assembly, wherein the locking cylinder cover (31) and the cylinder body (32) are used for locking the cylinder cover (31) and the locking assembly, the bottom of the cylinder cover (31) is fixedly connected with a sleeve ring (33) which is used for extruding a driven rolling pin (12) to enable the driven rolling pin (12) to be close to each other, the driving shaft (6) comprises a shaft body (62) and a replaceable cam body (63), the shaft body (62) is connected with a limiting part (64) which is used for limiting the shaft body (62) to move up and down in a clamping mode, the limiting part (64) and the shaft body (62) are clamped out to be semicircular and have elasticity, the limiting part (64) is connected with the cylinder cover (31) in a sliding mode, and a clamping assembly is arranged between the cam body (63) and the shaft body (62).
3. The drill bit fatigue impact damage testing machine of claim 2, wherein: the joint subassembly includes with cam body (63) sliding connection's joint piece (18), with axis body (62) interior fixedly connected with be used for promoting ejector pad (181) that joint piece (18) removed, vertical sliding connection has trigger piece (182) in axis body (62), trigger piece (182) are outside L type and top are located axis body (62), ejector pad (181) and the equal fixedly connected with reset spring (183) of joint piece (18), reset spring (183) respectively with axis body (62) and cam body (63) fixed connection.
4. The drill bit fatigue impact damage testing machine of claim 3, wherein: the locking assembly comprises a locking pin (191) fixedly connected with the barrel cover (31) and a locking sleeve (192) fixedly connected with the barrel body (32), and a locking nut (193) is connected between the locking sleeve (192) and the locking pin (191) in a threaded mode.
5. The drill bit fatigue impact damage testing machine of claim 4, wherein: support (2) top fixedly connected with joint groove (21), joint spare (34) of barrel (32) outer wall fixedly connected with and joint groove (21) joint, joint spare (34) fixedly connected with joint spring (35), joint spring (35) top fixedly connected with and cover (31) fixed connection's slide (36), slide (36) sliding connection has motor frame (37).
6. The drill bit fatigue impact damage testing machine of claim 5, characterized in that: the driving assembly comprises a driving motor (20) installed on a motor frame (37), the top of the motor frame (37) is rotatably connected with a driving wheel (201) and a driven wheel (202), the driving wheel (201) and the driven wheel (202) are transmitted through a belt and are respectively sleeved on an output shaft of the driving motor (20) and a driving shaft (6), the side wall of the top of the driving shaft (6) is provided with a sliding groove, and the inner wall of the driven wheel (202) is fixedly connected with a sliding key (203).
7. The drill bit fatigue impact damage testing machine of claim 2, wherein: the outer walls of the impact head (16) and the dynamometer (14) are respectively fixedly connected with a lug (91) which is in sliding connection with the impact force adjusting cylinder (9), and the lug (91) is located between the adjusting rings (10).
8. The drill bit fatigue impact damage testing machine of claim 7, wherein: the top of the barrel cover (31) and the bottom of the barrel body (32) are respectively clamped with a rotary centering block (5) and a linear motion centering block (8), the adjacent ends of the rotary centering block (5) and the linear motion centering block (8) are square, and the linear motion centering block (8) is vertically connected with the driven shaft (7) in a sliding mode through a key.
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|---|---|
| CN115791063B (en) | 2023-05-02 |
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Effective date of registration: 20230413 Address after: 257200 No.9, Yanghe Road, economic development zone, Hekou District, Dongying City, Shandong Province Applicant after: SHENGLI OIL FIELD WANHE OIL CONSTRUCTION TECHNIQUE LIMITED LIABILITY Co.,Ltd. Applicant after: China University of Petroleum (Beijing) Address before: 257200 No.9, Yanghe Road, economic development zone, Hekou District, Dongying City, Shandong Province Applicant before: SHENGLI OIL FIELD WANHE OIL CONSTRUCTION TECHNIQUE LIMITED LIABILITY Co.,Ltd. |
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