CN113155420A - Flexible support adjusting device for resonance rotation bending fatigue testing machine - Google Patents
Flexible support adjusting device for resonance rotation bending fatigue testing machine Download PDFInfo
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- CN113155420A CN113155420A CN202010054519.3A CN202010054519A CN113155420A CN 113155420 A CN113155420 A CN 113155420A CN 202010054519 A CN202010054519 A CN 202010054519A CN 113155420 A CN113155420 A CN 113155420A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a flexible support adjusting device for a resonance rotation bending fatigue testing machine, wherein a roller guide device is arranged on a frame base, a central frame guide device is fixed on the roller guide device, a central frame guide plate seat is fixed on the roller guide device, cam followers are arranged on two sides of a support rod mounting base plate and are in contact with the central frame guide plate, the central frame guide plate is connected with the central frame guide plate seat through a compression spring, a lower support rod is arranged on the support rod mounting base plate, a support rod mounting cover plate is arranged at the top end of the support rod mounting base plate, and an upper support rod is arranged on the support rod mounting cover plate; the oil cylinder fixing device is installed on the frame base and is arranged opposite to the roller guide device, the oil cylinder is installed on the oil cylinder fixing device, an oil cylinder piston rod fixing piece is fixed on the roller guide device, and a piston rod of the oil cylinder is connected with the roller guide device through the oil cylinder piston rod fixing piece. The device can continuously adjust the fulcrum to support and clamp the experiment pipeline.
Description
Technical Field
The invention relates to the technical field of part fatigue test devices, in particular to a flexible support adjusting device for a resonance rotation bending fatigue testing machine.
Background
To prevent premature failure of marine risers and subsea pipelines under cyclic loading, particularly for welded pipe joints and threaded pipe joints, the structures function to amplify stress, often failing first, and it is important to accurately predict the fatigue life of these structures. Aiming at the design, a testing machine for performing fatigue test on the marine riser and the submarine pipeline by applying the resonance principle has the advantages of high vibration frequency, small power, short test period, adaptability to the full-size marine riser and the submarine pipeline and the like. Before the pipe bending fatigue test is performed, it is necessary to obtain a zero point (stationary point) of the wave direction amplitude unique to the bending vibration of the pipe. After the stationary point is obtained, the support and the clamping are needed to be carried out, and the left and right adjustment is required in subsequent tests, so that a set of special support, clamping and moving device needs to be designed. A resonance bending fatigue testing machine is introduced in Chinese utility model patent specification CN202562796U, the supporting, clamping and moving device of the testing machine is divided into two parts, the positions of the dead end fulcrum and the live end fulcrum adjusting device are adopted, the ball screw is driven by a motor to move left and right, the fulcrum adjusting device can only be suitable for a plurality of fixed pipe diameters and can not be adjusted continuously; the invention also discloses a resonance bending fatigue testing machine in Chinese patent specification CN108362586A, wherein a flexible supporting device of the testing machine is composed of two saddle-shaped supports and four flexible cables, the two saddle-shaped supports are of V-shaped structures and are arranged oppositely up and down, the position of a fulcrum is adjusted by a motor and a lead screw, the flexible cable structure has large vibration during vibration starting, and the support adjustment is relatively difficult.
Disclosure of Invention
The invention overcomes the defects in the prior art, the support adjusting device of the prior resonance bending fatigue testing machine is difficult to adjust the pivot and has insufficient support flexibility, and provides the flexible support adjusting device for the resonance rotation bending fatigue testing machine.
The purpose of the invention is realized by the following technical scheme.
A flexible supporting and adjusting device for a resonance rotation bending fatigue testing machine comprises a supporting and clamping component, a fulcrum moving component and a frame base,
the supporting and clamping assembly comprises a supporting rod mounting cover plate, a supporting rod mounting base plate and a center frame guide device, the roller guide device is mounted on the frame base, the center frame guide device is fixed on the roller guide device, the center frame guide device comprises a cam follower, a center frame guide plate seat and a center frame guide plate, the center frame guide plate seat is fixed on the roller guide device, the cam followers are mounted on two sides of the supporting rod mounting base plate and are in contact with the center frame guide plate, the center frame guide plate is connected with the center frame guide plate seat through a compression spring, a lower supporting rod for clamping an experimental pipeline is arranged on the supporting rod mounting base plate, the supporting rod mounting cover plate is mounted at the top end of the supporting rod mounting base plate, semicircular pipeline accommodating grooves are formed in the middle parts of the connecting edges of the supporting rod mounting cover plate and the supporting rod mounting base plate, the experimental pipeline is placed on a pipeline supporting frame formed by the supporting rod mounting cover plate and the supporting rod mounting base plate through a pipeline placing groove, and an upper supporting rod used for being matched with the lower supporting rod to clamp the experimental pipeline is arranged on the supporting rod mounting cover plate;
the fulcrum removes the subassembly and includes gyro wheel guider, hydro-cylinder and hydro-cylinder fixing device, hydro-cylinder fixing device install on the frame base, and with gyro wheel guider sets up relatively, the hydro-cylinder is installed on the hydro-cylinder fixing device be fixed with hydro-cylinder piston rod mounting on the gyro wheel guider, the piston rod of hydro-cylinder passes through hydro-cylinder piston rod mounting with gyro wheel guider links to each other.
The number of the upper supporting rods is 2, and the connecting lines of the extension lines of the 2 upper supporting rods are intersected at the circle center of the cross section of the experimental pipeline.
Offer the U type groove that is used for adjusting the length of stretching out on going up the bracing piece, go up the bracing piece pass through locking bolt with bracing piece installation apron sliding connection, go up the bracing piece promptly and can be along the direction in U type groove round trip movement on bracing piece installation apron to reach the purpose that is suitable for the experiment pipeline of different pipe diameters the tail end of going up the bracing piece is installed and is used for reducing the last gyro wheel of friction between last bracing piece and the experiment pipeline the side of going up the gyro wheel still is provided with and is used for the tight last brake block of test pipeline clamp.
The number of the lower supporting rods is 2, and the connecting lines of the extension lines of the 2 lower supporting rods are intersected at the circle center of the cross section of the experimental pipeline.
The tail end of the lower supporting rod is provided with a lower roller used for reducing friction between the lower supporting rod and the experiment pipeline, and the side surface of the lower roller is also provided with a lower brake block used for clamping the experiment pipeline.
And air springs for reducing experiment noise and experiment vibration are arranged between the strut mounting bottom plate and the roller guide device, and the number of the air springs is 2.
The number of the cam followers is 4 pairs, and the cam followers are divided into 2 groups and are oppositely arranged on two sides of the strut mounting base plate.
And the outer sides of the cam followers, the center frame guide plates and the compression springs are provided with center frame guide side plates for protecting the center frame guide plates and the compression springs, and the number of the compression springs is 8, and the compression springs are divided into two groups which are respectively arranged between the center frame guide plate seats and the center frame guide plates on two sides of the strut mounting base plate.
The roller guide device comprises a guide roller support and a roller support connecting beam, the bottom end of the guide roller support is movably mounted on the frame base, the bottom end of the guide roller support can be fixed on the frame base through a bolt, the top end of the guide roller support is connected with the roller support connecting beam through a bolt, and the center frame guide plate seat is fixed on the roller support connecting beam through a bolt.
The frame base comprises a base cross beam, a base side beam and a foot cup, two guide rails which are arranged in parallel are arranged on the upper surface of the base cross beam, the guide roller bracket and the oil cylinder fixing device are movably mounted on the guide rails and can be fixed on the base cross beam through bolts, the lower surface of the base cross beam is connected with the base side beam through bolts, and the foot cup is fixed on the base side beam.
The invention has the beneficial effects that: the device can effectively provide a supporting and clamping effect for an experimental pipeline, and meanwhile, the powerful thrust of the hydraulic cylinder can well adjust the left position and the right position of the fulcrum. Set up the spring in the experiment pipeline left and right sides direction and can offset the volume of movement of left and right sides direction when the experiment pipeline starts to shake better, go up the design of vaulting pole and make the experiment pipeline's that can support size further enlarge, the support of air spring also makes whole device motion steady.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of the upper support rod of the present invention, wherein a is a front view of the upper support rod, and b is a left view of the upper support rod;
FIG. 4 is a schematic view of the arrangement of the cam followers, center frame guide plates and center frame guide plate mounts of the present invention;
FIG. 5 is a schematic bottom view of the structure of FIG. 1 of the present invention;
in the figure: the device comprises an upper support rod 1, an upper brake block 2, a support rod mounting cover plate 3, a cam follower 4, a center frame guide side plate 5, an air spring 6, an oil cylinder piston rod fixing part 7, a base cross beam 8, a base side beam 9, a foot cup 10, a guide roller support 11, a roller support connecting beam 12, a center frame guide plate seat 13, a center frame guide plate 14, a lower support rod 15, a support rod mounting bottom plate 16, an oil cylinder 17, a guide wheel 18, a frame base 19, an oil cylinder fixing device 20, a guide rail 21, a U-shaped groove 22, a locking bolt 23 and an upper roller 24.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
The flexible support adjusting device for the resonance rotation bending fatigue testing machine comprises a support and clamping component, a fulcrum moving component and a frame base 19,
the supporting and clamping assembly comprises a supporting rod mounting cover plate 3, a supporting rod mounting base plate 16 and a center frame guide device, the roller guide device is mounted on a frame base 19, the center frame guide device is fixed on the roller guide device, the center frame guide device comprises a cam follower 4, a center frame guide plate seat 13 and a center frame guide plate 14, the center frame guide plate seat 13 is fixed on the roller guide device, the cam follower 4 is mounted on two sides of the supporting rod mounting base plate 16, the cam follower 4 is contacted with the center frame guide plate 14, the center frame guide plate 14 is connected with the center frame guide plate seat 13 through a compression spring, a lower supporting rod 15 for clamping an experimental pipeline is arranged on the supporting rod mounting base plate 16, the supporting rod mounting cover plate 3 is mounted on the top end of the supporting rod mounting base plate 16, semicircular pipeline accommodating grooves are formed in the middle parts of the edges of the connecting part of the supporting rod mounting cover plate 3 and the supporting rod mounting base plate 16, the experimental pipeline is placed on a pipeline supporting frame formed by a supporting rod mounting cover plate 3 and a supporting rod mounting base plate 16 through a pipeline placing groove, and an upper supporting rod 1 used for being matched with a lower supporting rod 15 to clamp the experimental pipeline is arranged on the supporting rod mounting cover plate 3;
the fulcrum moving assembly comprises a roller guide device, an oil cylinder 17 and an oil cylinder fixing device 20, wherein the oil cylinder fixing device 20 is installed on the frame base 19 and is arranged opposite to the roller guide device, the oil cylinder 17 is installed on the oil cylinder fixing device 20, an oil cylinder piston rod fixing part 7 is fixed on the roller guide device, and a piston rod of the oil cylinder 17 is connected with the roller guide device through the oil cylinder piston rod fixing part 7.
Example two
On the basis of the first embodiment, the number of the upper supporting rods 1 is 2, and the connecting lines of the extension lines of the 2 upper supporting rods 1 intersect at the circle center of the cross section of the experimental pipeline.
Offer the U type groove 22 that is used for adjusting the length of stretching out on last bracing piece 1, go up vaulting pole 1 through locking bolt 23 and vaulting pole installation apron 3 sliding connection, go up vaulting pole 1 promptly can be along U type groove 22 direction round trip movement on vaulting pole installation apron 3 to reach the purpose that is suitable for the experiment pipeline of different pipe diameters, install the last gyro wheel 24 that is used for reducing the friction between last vaulting pole 1 and the experiment pipeline at the tail end of last vaulting pole 1, still be provided with in the side of last gyro wheel and be used for the tight last brake block 2 of experiment pipeline clamp.
The number of the lower support rods 15 is 2, and the connecting lines of the extension lines of the 2 lower support rods 15 intersect at the circle center of the cross section of the experimental pipeline.
The tail end of the lower supporting rod 15 is provided with a lower roller for reducing friction between the lower supporting rod 15 and the experimental pipeline, and the side surface of the lower roller is also provided with a lower brake block for clamping the experimental pipeline.
EXAMPLE III
On the basis of the second embodiment, air springs 6 for reducing experiment noise and experiment vibration are arranged between the strut mounting base plate 16 and the roller guide device, and the number of the air springs 6 is 2.
The number of the cam followers 4 is 4 pairs, and the cam followers are divided into 2 groups and are oppositely arranged on both sides of the stay mounting base plate 16.
And the outer sides of the cam followers 4, the center frame guide plates 14 and the compression springs are provided with center frame guide side plates 5 for protecting the center frame guide plates 14 and the compression springs, the number of the compression springs is 8, and the compression springs are divided into two groups which are respectively arranged between the center frame guide plate seats 13 and the center frame guide plates 14 on the two sides of the strut mounting base plate 16.
Example four
On the basis of the third embodiment, the roller guide device comprises a guide roller support 11 and a roller support connecting beam 12, the bottom end of the guide roller support 11 is movably mounted on a frame base 19, the bottom end of the guide roller support 11 can be fixed on the frame base 19 through a bolt, the top end of the guide roller support 11 is fixedly connected with the roller support connecting beam 12 through a bolt, and a center frame guide plate seat 13 is fixed on the roller support connecting beam 12 through a bolt.
The frame base 19 comprises a base cross beam 8, a base side beam 9 and a foot cup 10, two guide rails 21 which are arranged in parallel are arranged on the upper surface of the base cross beam 8, a guide roller support 11 and an oil cylinder fixing device 20 are movably mounted on the guide rails 21, the guide roller support 11 and the oil cylinder fixing device 20 can be fixed on the base cross beam 8 through bolts, the lower surface of the base cross beam 8 is fixedly connected with the base side beam 9 through bolts, and the foot cup 10 is fixed on the base side beam 9.
During the use, at first, pull down vaulting pole installation apron, arrange the experiment pipeline in vaulting pole mounting plate on, it links to each other vaulting pole installation apron and vaulting pole mounting plate are fixed again, adjust clamping degree through last vaulting pole and bottom suspension vaulting pole, then, loosen the bolt on the guide roller support, fixed hydro-cylinder fixing device, promote the guide roller support through the impetus of hydro-cylinder again and drive support and the clamping component on it and carry out the adjustment of fulcrum, the fulcrum adjustment is accomplished the back, fix the guide roller support on the guide rail through the bolt, it can to begin the experiment.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A flexible support adjusting device for resonance rotation bending fatigue testing machine which characterized in that: comprises a supporting and clamping component, a fulcrum moving component and a frame base,
the supporting and clamping assembly comprises a supporting rod mounting cover plate, a supporting rod mounting base plate and a center frame guide device, the roller guide device is mounted on the frame base, the center frame guide device is fixed on the roller guide device, the center frame guide device comprises a cam follower, a center frame guide plate seat and a center frame guide plate, the center frame guide plate seat is fixed on the roller guide device, the cam followers are mounted on two sides of the supporting rod mounting base plate and are in contact with the center frame guide plate, the center frame guide plate is connected with the center frame guide plate seat through a compression spring, a lower supporting rod for clamping an experimental pipeline is arranged on the supporting rod mounting base plate, the supporting rod mounting cover plate is mounted at the top end of the supporting rod mounting base plate, semicircular pipeline accommodating grooves are formed in the middle parts of the connecting edges of the supporting rod mounting cover plate and the supporting rod mounting base plate, the experimental pipeline is placed on a pipeline supporting frame formed by the supporting rod mounting cover plate and the supporting rod mounting base plate through a pipeline placing groove, and an upper supporting rod used for being matched with the lower supporting rod to clamp the experimental pipeline is arranged on the supporting rod mounting cover plate;
the fulcrum removes the subassembly and includes gyro wheel guider, hydro-cylinder and hydro-cylinder fixing device, hydro-cylinder fixing device install on the frame base, and with gyro wheel guider sets up relatively, the hydro-cylinder is installed on the hydro-cylinder fixing device be fixed with hydro-cylinder piston rod mounting on the gyro wheel guider, the piston rod of hydro-cylinder passes through hydro-cylinder piston rod mounting with gyro wheel guider links to each other.
2. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 1, characterized in that: the number of the upper supporting rods is 2, and the connecting lines of the extension lines of the 2 upper supporting rods are intersected at the circle center of the cross section of the experimental pipeline.
3. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 2, characterized in that: the U-shaped groove is formed in the upper supporting rod, the upper supporting rod is connected with the supporting rod mounting cover plate in a sliding mode through a locking bolt, an upper roller is mounted at the tail end of the upper supporting rod, and an upper brake block is further arranged on the side face of the upper roller.
4. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 1, characterized in that: the number of the lower supporting rods is 2, and the connecting lines of the extension lines of the 2 lower supporting rods are intersected at the circle center of the cross section of the experimental pipeline.
5. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 4, characterized in that: the tail end of the lower supporting rod is provided with a lower roller, and the side surface of the lower roller is also provided with a lower brake block.
6. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 1, characterized in that: and air springs are arranged between the strut mounting bottom plate and the roller guide device, and the number of the air springs is 2.
7. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 1, characterized in that: the number of the cam followers is 4 pairs, and the cam followers are divided into 2 groups and are oppositely arranged on two sides of the strut mounting base plate.
8. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 7, characterized in that: and the outer sides of the cam followers, the center frame guide plate and the compression springs are provided with center frame guide side plates, the number of the compression springs is 8, and the compression springs are divided into two groups which are respectively arranged between the center frame guide plate seats and the center frame guide plates which are positioned at two sides of the strut mounting bottom plate.
9. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 1, characterized in that: the roller guide device comprises a guide roller support and a roller support connecting beam, the bottom end of the guide roller support is movably mounted on the frame base, the bottom end of the guide roller support can be fixed on the frame base through a bolt, the top end of the guide roller support is connected with the roller support connecting beam through a bolt, and the center frame guide plate seat is fixed on the roller support connecting beam through a bolt.
10. The flexible support adjustment device for the resonance rotary bending fatigue testing machine according to claim 9, characterized in that: the frame base comprises a base cross beam, a base side beam and a foot cup, two guide rails which are arranged in parallel are arranged on the upper surface of the base cross beam, the guide roller bracket and the oil cylinder fixing device are movably mounted on the guide rails and can be fixed on the base cross beam through bolts, the lower surface of the base cross beam is connected with the base side beam through bolts, and the foot cup is fixed on the base side beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054519.3A CN113155420A (en) | 2020-01-17 | 2020-01-17 | Flexible support adjusting device for resonance rotation bending fatigue testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054519.3A CN113155420A (en) | 2020-01-17 | 2020-01-17 | Flexible support adjusting device for resonance rotation bending fatigue testing machine |
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| CN113155420A true CN113155420A (en) | 2021-07-23 |
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| CN202010054519.3A Pending CN113155420A (en) | 2020-01-17 | 2020-01-17 | Flexible support adjusting device for resonance rotation bending fatigue testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899617A (en) * | 2021-09-28 | 2022-01-07 | 天津大学 | Fulcrum position adjusting device for full-size pipeline resonance bending fatigue testing machine |
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2020
- 2020-01-17 CN CN202010054519.3A patent/CN113155420A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899617A (en) * | 2021-09-28 | 2022-01-07 | 天津大学 | Fulcrum position adjusting device for full-size pipeline resonance bending fatigue testing machine |
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