CN112665841B - Adjustable hoop bending fatigue testing device based on surrounding motion - Google Patents

Abstract

The invention discloses an adjustable hoop bending fatigue testing device based on surrounding motion, and relates to the field of hoop testing application. According to the invention, the circular reciprocating 8-shaped surrounding motion of the hoop testing component is realized by the opposite rotation of the adjacent chucks in the transmission module and the control of the umbrella-shaped swing mechanism; the contact depth of the clamp test assembly and the resistance piece is controlled through the vertical driving module, the effect of adjusting the resistance is achieved, the flow resistance and the bending moment of friction force continuously received by the clamp test assembly in motion are changed, and the effect of performing all-dimensional and multi-angle bending fatigue test and measurement on a plurality of clamp test assemblies under the condition that the bending moment force is adjustable is achieved. The invention not only reduces the energy loss in the testing process, but also realizes the simulation of the complex working environment of the clamp component, improves the testing precision and the testing efficiency, and has strong practicability.

Description

An adjustable hoop bending fatigue test device based on circular motion

technical field

The invention relates to the application field of hoop testing, in particular to an adjustable hoop bending fatigue testing device based on circular motion.

Background technique

With the improvement of aircraft performance and pipeline design level in recent years, the reliability performance requirements of the system pipeline connection clamps are also increasing, thus giving birth to many clamp reliability performance testing equipment.

At present, the conventional clamp bending fatigue test method is: install the clamp and its components on the fixing fixture as shown in Figure 1, apply the minimum tightening torque, rigidly fix one end of the conduit 07, and apply a force to the ear piece 011 at the other end. 80% of rated bending moment. The inside of the joint reaches the maximum working pressure, and the working medium is aviation kerosene. Apply 100,000 offset cycles to the test assembly, one offset cycle includes: first apply the bending moment downwards, then unload, then apply the bending moment upwards, and then unload. The cycle rate was 60-120 cycles per minute. Rotate the test assembly by 90° every 25,000 cycles, and ensure that the joints are not loosened or tightened at this time. After the test, disassemble the clamp and conduct a visual inspection. The clamp should not be leaked, deformed or damaged.

However, the conventional clamp testing device fixes one end of the clamp assembly and loads the bending moment force reciprocating up and down on the other end, not only the energy consumption increases sharply, but also the direction of the bending moment is fixed, which is quite different from the actual force environment of the clamp on site. Efficiency and test accuracy are relatively low. Therefore, how to propose a novel clamp clamping force testing device in view of the above-mentioned deficiencies is a problem to be solved urgently in the present invention.

Contents of the invention

The object of the present invention is to provide an adjustable hoop bending fatigue testing device based on circular motion to solve the problems in the prior art; the adjustable hoop bending fatigue testing device can not only drive the hoop test assembly to do The "8" figure moves around, and can change the flow resistance and friction bending moment of the clamp test component during the movement, and finally realize the bending fatigue test of the clamp test component under different bending moments at multiple angles.

To achieve the above object, the present invention provides the following scheme:

The invention provides an adjustable hoop bending fatigue test device based on circular motion, which mainly includes:

A transmission module, the transmission module includes a chuck set and a ferrule arranged on the outer periphery of the chuck set; the chuck set includes at least two adjacently arranged chucks, and the outer periphery of the chuck is provided with at least one A card slot; the clamp test assembly is placed in the card slot to rotate with the chuck;

A guide module, the guide module is installed between two adjacent chucks, and is used to connect and transition the clamp test assembly from one chuck to the other chuck;

A rotary drive module, the rotary drive module is connected with the chuck group, and is used to drive each chuck to rotate, and two adjacent chucks to rotate in reverse, so as to realize the circular movement of the clamp test assembly ;

An experimental module, the experimental module includes a resistance member, the resistance member is in contact with one end of the clamp test assembly, and is used to set resistance to the circular movement of the clamp test assembly;

A vertical driving module, the vertical driving module is connected to the other end of the hoop test assembly, and is used to regulate the contact depth between the hoop test assembly and the resistance member.

Optionally, the adjustable hoop bending fatigue test device further includes a first base, on which the rotation drive module, the transmission module and/or the guide module are installed.

Optionally, the vertical drive module is a hydraulic loading mechanism.

Optionally, the hydraulic loading mechanism includes a second base, a frame set on the second base, and a hydraulic cylinder set on the top of the frame; the hydraulic cylinder is connected to the transmission module through a telescopic rod , and the telescopic rod is hinged to the transmission module.

Optionally, a guide mechanism is provided between the transmission module and the frame, and the guide mechanism includes a slide rail and a slide block slidably installed on the slide rail, and the slide rail is installed on the slide rail through a support block. On the frame, the slider is installed on the transmission module.

Optionally, the rotary drive module includes a motor, a driving gear and a driven gear set meshing with the driving gear, the motor is connected to the driving gear through a connecting shaft; the driving gear and the driven gear Each driven gear in the group is respectively connected with one said chuck.

Optionally, at least two locking grooves are provided at intervals on the outer circumference of the chuck.

Optionally, the guide module includes a bracket and an umbrella whose bottom is hinged on the bracket; the handle top of the umbrella is also connected to the bottom of the bracket through a spring.

Optionally, the resistance member includes a test pool and a viscous substance disposed in the test pool.

Optionally, the clamp test assembly includes a first conduit, a second conduit and a clamp connecting the two conduits.

Compared with the prior art, the present invention has achieved the following technical effects:

The adjustable hoop bending fatigue test device based on the circling motion provided by the present invention has a reasonable structure, and realizes the cyclic reciprocation of the hoop test assembly through the relative rotation of the adjacent chucks in the transmission module and the control of the umbrella swing mechanism. "8"-shaped circular movement; through the vertical drive module, the contact depth between the clamp test component and the resistance part is controlled to achieve the effect of adjusting the resistance, thereby changing the continuous flow resistance and friction bending moment of the clamp test component during motion , so as to achieve the effect of performing all-round and multi-angle bending fatigue resistance tests on multiple clamp test components at the same time under the condition that the magnitude of the bending moment force can be adjusted. The adjustable hoop bending fatigue test device of the present invention has high reliability, not only can adjust the magnitude of the bending moment force on the hoop test assembly, but also the direction of the bending moment is constantly changing, which not only reduces the energy loss in the testing process, but also To achieve the purpose of simulating the complex working environment of clamp components, the test accuracy and test efficiency are greatly improved, and the practicability is strong, which lays the foundation for expanding the application field of clamp testing.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the structural representation of the test assembly in the existing hoop bending fatigue test;

Fig. 2 is a structural schematic diagram of the adjustable hoop bending fatigue testing device of the present invention;

Fig. 3 is the structural representation of vertical loading module of the present invention;

Fig. 4 is the structural representation of transmission module of the present invention;

Fig. 5 is a schematic diagram of the ferrule removal structure of the transmission module of the present invention;

Fig. 6 is a structural schematic diagram of the guiding module of the present invention;

Fig. 7 is a schematic diagram of the swing principle of the guide module of the present invention;

Fig. 8 is a schematic diagram of the movement trajectory of the clamp test assembly of the present invention;

Fig. 9 is a schematic structural view of the clamp test assembly of the present invention;

Wherein, reference sign is:

01-Clamp; 02, 03-Joint; 04-Sealing ring; 05-Nozzle; 06-Clog; 07, 08-Conduit;

1-experimental pool; 101-viscous substance; 2-ferrule; 3-driving gear; 4-chuck; 5-driven gear; 6-connecting shaft; 7-bearing holder; 8-motor; 9-loading connection Rod; 10-connecting rod; 11-telescopic rod; 12-hydraulic cylinder; 13-frame; 14-support plate; 15-slider; Bracket; 20-first base; 21-spring; 22-umbrella; 23-plug; 24-first conduit; 25-clamp; 26-second conduit; 27-collar; ; 29-blocking cover.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The object of the present invention is to provide an adjustable hoop bending fatigue test device based on circular motion, which can not only drive the hoop test assembly to do a reciprocating "8"-shaped circular motion, Moreover, it is possible to change the flow resistance and friction bending moment of the clamp test component in motion, and finally realize the bending fatigue test of the clamp test component under different bending moments at multiple angles.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one:

As shown in Figure 2-9, this embodiment provides an adjustable hoop bending fatigue test device based on circular motion, the device mainly includes a vertical drive module, a rotary drive module, a guide module, an experiment module, a transmission module and a hoop Test component 28. The vertical drive module drives the clamp test assembly 28 to move up and down to adjust the depth at which one end of the clamp test assembly 28 is inserted into the resistance material in the test pool 1, thereby adjusting the resistance of the clamp test assembly 28. The rotation drive module is connected with the transmission module and provides rotation power to the transmission module. The transmission module cooperates with the guide module to drive the hoop test assembly 28 to realize reciprocating circular movement around "8". The resistance substance mentioned above is preferably a viscous substance 101, such as viscous liquid or rubber.

In this embodiment, as shown in Figures 4-5, the rotary drive module includes a motor 8, a connecting shaft 6, a driving gear 3 and a driven gear 5, the driving gear 3 is connected to the output end of the motor 8 through the connecting shaft 6, The driven gear 5 meshes with the driving gear 3; a bearing holder 7 is installed on the first base 20, and the connecting shaft 6 and the supporting shaft of the driven gear 5 are installed in the bearing holder 7 to ensure the normal rotation of the gear set. In this embodiment, the transmission module includes two adjacent chucks 4 , and a ferrule 2 is sheathed on the outside of the chucks 4 ; the driven gear 5 and the driving gear 3 are coaxially connected with one chuck 4 respectively. When the motor 8 works, the connecting shaft 6 connected to the motor 8 rotates, the driving gear 3 and the chuck 4 connected to the connecting shaft 6 rotate clockwise, and the driven gear 5 meshed with the driving gear 3 rotates in the opposite direction, thereby The other coaxial chuck 4 is also driven to rotate in the opposite direction; the clamp test assembly 28 fixed between the chuck 4 and the ferrule 2 rotates in the direction of the chuck 4 .

In this embodiment, as shown in Figures 6-7, the guide module is an umbrella swing mechanism, including an umbrella 22, a spring 21 and a bracket 19, and the bracket 19 is fixed on the first base 20 and is located on the two chucks 4 between. Wherein, the umbrella-shaped part 22 is upside down, and the center of its cross bar is hinged with the support 19, and the top of the umbrella handle is connected with the support 19 by the spring 21. When the spring 21 was in a natural state, the umbrella-shaped part 22 was tilted at one end and the other end was raised. Press down close to the state of the bracket 10. As shown in Figures 6-8, when the clamp test assembly 28 rotates to the contact point of the two chucks with the chucks 4, it encounters the guide module and is forced to turn to the other side by being hindered by the umbrella handle of the umbrella-shaped part 22 in the guide module. A chuck 4 rotates thereupon, after that, one end of the umbrella-shaped part 22 is tilted and pressed down, and one end is pressed down, and the change of the spring 21 is then from the natural state to the stretched state to the natural state. The subsequent clamp test assembly 28 encounters the guide module again and is forced to return to the original chuck 4 to rotate in the opposite direction, and the umbrella 22 then returns to its original state. To sum up, the hoop test assembly 28 changes the rotation trajectory after one revolution with the chuck 4, and repeats the cycle, then the "8" character encircling track of the hoop test assembly 28 can be formed; during this process, the umbrella 22 With the change of the hoop test assembly 28 rotation trajectory, it swings left and right.

In this embodiment, the guide module mainly plays a connecting and transitional role. The chuck 4 is provided with a slot. When the clamp test assembly 28 in a slot on the chuck 4 triggers the umbrella 22, the umbrella 22 swings. At the moment when the swing is completed, a certain empty slot on the other chuck 4 just turns over the umbrella 22, and just accepts the clamp test assembly 28 that has jumped over. A plurality of clamping slots can be arranged on the chuck 4 at intervals, so that the transmission module can accurately test multiple sets of clamp test components 28 at the same time.

In this embodiment, as shown in FIG. 2 , the transmission module is arranged longitudinally, and the bottom end of the clamp test assembly 28 protrudes into the test pool 1 , and the vertical driving module is arranged directly above the transmission module. Wherein, the vertical driving module includes a hydraulic cylinder 12, a frame 13, a second base 18, a telescopic rod 11, a support plate 14, a connecting rod 10 and a loading link 9, and the support plate 14 and the loading link 9 are fixedly connected to the connecting link respectively. The top and the bottom of 10, expansion link 11 and support plate 14 are hinged. When the hydraulic cylinder 12 is working, it can drive the connected telescopic rod 11 to move up and down, thereby driving the rotary drive module and the guide module to move up and down, and then changing the depth of the bottom end of the clamp test assembly 28 inserted into the viscous substance 101, thereby adjusting the resistance of the substance to the test The magnitude of the bending moment of the clamp assembly 28 .

In this embodiment, as shown in FIG. 2 , a guiding mechanism is also provided on the transmission module. The guide mechanism includes a slide block 15 , a slide rail 16 and a support block 17 . The slide rail 16 is longitudinally installed on the side wall of the frame 13 through the support block 17 , the slide block 15 is fixedly connected with the support plate 14 , and the slide block 15 is slidably installed on the slide rail 16 . When the vertical drive module drives the rotary drive module and the guide module to move up and down, the guide mechanism acts as a guide to prevent the longitudinal loading force from shifting.

In this embodiment, as shown in FIG. 9 , the clamp test assembly 28 includes a plug-23, a conduit-24, a clamp-25, and a conduit II-26. The conduit II-26 is provided with a collar-27 and a plug-29. In this embodiment, as shown in FIG. 8 , the clamp test assembly 28 includes a first conduit 24, a clamp 25 and a second conduit 26; one end of the first conduit 24 is provided with a plug 23, and one end of the second conduit 26 is provided with a collar 27 and blocking cover 29. The clamp 25 is used to connect the other end of the first conduit 24 and the other end of the second conduit 26 . When the clamp test assembly 28 is assembled on the chuck 4, the collar 27 and the blocking cover 29 can play a position-limiting role.

As shown in Figure 1, it is a structural arrangement of the clamp pipe assembly in an existing clamp bending fatigue test method, including the clamp 01, the conduit 07 and the conduit 08, and the connecting ends of the conduit 07 and the conduit 08 are respectively provided with a joint 02 With the joint 03, the clamp 01 is installed at the butt joint of the joint 02 and the joint 03 to realize the connection of the two conduits. Wherein, a sealing ring 04 is also provided between the clamp 01 and the conduit; the outer end of the conduit 07 is also provided with a plug 09, a nozzle 05 and a plug 06 in sequence, and the outer end of the conduit 08 is also sequentially provided with a plug 010 and an ear Film 011. In this embodiment, the hoop test assembly 28 can also adopt the connection structure between the hoop 01 and the conduit 07 and the conduit 08 shown in FIG. 1 , and the remaining structures shown in FIG. 1 can be selected and improved according to specific test requirements , which will not be repeated here.

It can be seen that the adjustable hoop bending fatigue test device based on circular motion provided by this embodiment controls the reverse rotation of two adjacent chucks through the transmission module, and realizes the hoop test assembly in the adjacent area through the umbrella swing mechanism. A reciprocating "8" circle movement is made between the two chucks. One end of the clamp test assembly is inserted into the resistance piece to generate a bending moment due to resistance, and the resistance bending moment is adjusted in real time under the drive of the vertical drive module, so as to achieve Under the condition that the magnitude of the bending moment force can be adjusted, the effect of the all-round and multi-angle bending fatigue test is carried out on multiple clamp test components at the same time. The invention not only greatly reduces the required energy, but also can continuously change the direction and magnitude of the bending moment received by the clamp test assembly as it moves, realizing the effect of simulating the complex working environment of the clamp assembly, thereby improving the reliability of the test. It expands the application field of clamp testing and has strong practicability.

It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. . Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the invention, and any reference sign in a claim shall not be construed as limiting the claim concerned.

In the present invention, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to the present invention The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (9)

1. The utility model provides an adjustable clamp bending fatigue testing arrangement based on encircleing motion which characterized in that includes:

the transmission module comprises a chuck set and a clamping sleeve arranged on the periphery of the chuck set; the chuck set comprises at least two chucks which are adjacently arranged, and the periphery of each chuck is provided with at least one clamping groove; the hoop test component is placed in the clamping groove to rotate along with the chuck;

the guide module is arranged between two adjacent chucks and used for transferring the hoop test assembly from one chuck to the other chuck in an engagement manner; the guide module comprises a support and an umbrella-shaped part of which the bottom is hinged on the support, and the top of an umbrella handle of the umbrella-shaped part is also connected with the bottom of the support through a spring;

the rotary driving module is connected with the chuck set and used for driving the chucks to rotate, and two adjacent chucks rotate reversely, so that the hoop testing assembly can move around;

the experiment module comprises a resistance piece, the resistance piece is in contact with one end of the hoop testing component and is used for setting resistance to the surrounding movement of the hoop testing component;

the vertical driving module is connected with the other end of the clamp testing component and used for regulating and controlling the contact depth of the clamp testing component and the resistance piece.

2. The circling motion-based adjustable hoop bending fatigue testing device of claim 1, further comprising a first base on which the rotary drive module, the transmission module and/or the guide module are mounted.

3. The looping movement based adjustable clamp bending fatigue testing device according to claim 1, wherein the vertical driving module is a hydraulic loading mechanism.

4. The looping movement-based adjustable clamp bending fatigue testing device according to claim 3, wherein the hydraulic loading mechanism comprises a second base, a frame arranged on the second base, and a hydraulic cylinder arranged at the top of the frame; the hydraulic cylinder is connected with the transmission module through a telescopic rod, and the telescopic rod is hinged with the transmission module.

5. The adjustable hoop bending fatigue testing device based on the encircling motion of claim 4, wherein a guiding mechanism is arranged between the transmission module and the rack, the guiding mechanism comprises a slide rail and a slide block slidably mounted on the slide rail, the slide rail is mounted on the rack through a supporting block, and the slide block is mounted on the transmission module.

6. The adjustable hoop bending fatigue testing device based on encircling movement of claim 1, wherein the rotation driving module comprises a motor, a driving gear and a driven gear set meshed with the driving gear, and the motor is connected with the driving gear through a connecting shaft; and each driven gear in the driving gear and the driven gear set is respectively connected with one chuck.

7. The adjustable hoop bending fatigue testing device based on encircling movement of claim 1, wherein the periphery of the chuck is provided with at least two clamping grooves at intervals.

8. The wrap-around motion based adjustable clamp bending fatigue testing apparatus of claim 1, wherein the resistance member comprises a test cell and a viscous substance disposed within the test cell.

9. The wrap motion based adjustable clamp bending fatigue testing apparatus of claim 1, wherein the clamp testing assembly comprises a first conduit, a second conduit, and a clamp connecting the two conduits.

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