CN110542523A - Environmental temperature controllable elastic bearing bending stiffness detection system and detection method - Google Patents
Environmental temperature controllable elastic bearing bending stiffness detection system and detection method Download PDFInfo
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- CN110542523A CN110542523A CN201910664107.9A CN201910664107A CN110542523A CN 110542523 A CN110542523 A CN 110542523A CN 201910664107 A CN201910664107 A CN 201910664107A CN 110542523 A CN110542523 A CN 110542523A
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- elastic bearing
- connecting seat
- bending stiffness
- bearing
- current speed
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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
- G01M13/04—Bearings
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
Abstract
the invention relates to an environment temperature controllable elastic bearing bending rigidity detection system and a detection method thereof. An elastic bearing bending rigidity detection system with controllable environmental temperature is provided with a machine base and a machine case, wherein regulating and controlling equipment is arranged in the machine case, stand columns are respectively arranged on two sides above the machine base, a cross beam is arranged at the top end between the stand columns, an upper chuck is arranged in the middle part below the cross beam, and a lower chuck corresponding to the upper chuck is arranged between the stand columns on the machine base; the upper chuck and the lower chuck are both provided with interfaces, a bearing base can be connected between the interfaces, the middle part of the bearing base is provided with an insertion hole, and an equipment bin is arranged below the insertion hole; an angle sensor is placed in the equipment bin and connected with a torsion bar in the horizontal direction, the tail end of the torsion bar is connected with a linkage bar perpendicular to the torsion bar, the linkage bar is fixedly connected onto the connecting seat, and two ends of the elastic bearing are respectively connected with the connecting seat and the bearing base.
Description
Technical Field
The invention relates to an environment temperature controllable elastic bearing bending rigidity detection system and a detection method thereof.
Background
The elastic bearing is a structural member with a metal sheet and a rubber interlayer and is formed by laminating an elastic body formed by compounding a metal large head, a metal small head, a metal bowl sheet and rubber; the metal bowl sheet and the rubber form an elastic body through bonding, and the metal big head, the metal small head and the elastic body are laminated to form a whole through bonding.
the elastic bearing is an important component of a helicopter rotor system, and needs to bear various acting forces such as centrifugal force, flapping, shimmy and the like from a blade in the working process, and the stress condition is complex, so that before installation or mass production, a bending stiffness test needs to be carried out, and various performance indexes of the elastic bearing need to be tested so as to test the production and processing technology of the elastic bearing, thereby ensuring the quality of products.
The bending rigidity of the elastic bearing refers to the capability of the metal big head of the elastic bearing to generate corresponding bending deformation relative to the metal small head under the action of flapping force or pendulum vibration force.
If the elastic bearing fails after being installed, the main rotor of the helicopter is affected in the working process, and a crash accident can happen in the serious case.
Disclosure of Invention
because the elastic bearing contains rubber components, and the specific parameters of the rubber can change at different temperatures, the elastic bearing can be influenced correspondingly;
the invention aims at the problem that the performance and the service life of the elastic bearing of the helicopter are correspondingly changed at different environmental temperatures, and the elastic bearing can be better detected by utilizing the invention so as to carry out data analysis.
The invention simulates the actual use temperature range in the experimental environment, tests the bending rigidity performance of the elastic bearing at different temperatures, and can accurately test the bending rigidity of a single elastic bearing along with the change value of the temperature and the bending rigidity at constant temperature. The invention has small volume, flexible disassembly and higher test efficiency and test precision.
An elastic bearing bending rigidity detection system with controllable environmental temperature is provided with a machine base and a machine case, wherein regulating and controlling equipment is arranged in the machine case, stand columns are respectively arranged on two sides above the machine base, a cross beam is arranged at the top end between the stand columns, an upper chuck is arranged in the middle part below the cross beam, and a lower chuck corresponding to the upper chuck is arranged between the stand columns on the machine base; the upper chuck and the lower chuck are both provided with interfaces, a bearing base can be connected between the interfaces, the middle part of the bearing base is provided with an insertion hole, and an equipment bin is arranged below the insertion hole; an angle sensor is arranged in the equipment bin and connected with a torsion bar in the horizontal direction, the tail end of the torsion bar is connected with a linkage bar perpendicular to the torsion bar, the linkage bar is fixedly connected to a connecting seat, and two ends of an elastic bearing are respectively connected with the connecting seat and a bearing base; the two sides of the connecting seat are respectively provided with a traction hole, the traction holes are connected with a tractor through traction ropes or traction rods, and the tractor is electrically connected with the regulating and controlling equipment; traction force can be exerted to the connecting seat by the tractor, and then pressure is exerted on the elastic bearing, and the elastic bearing generates elastic deformation after receiving the pressure, and then drives the torsion bar to twist reverse, and the angle sensor measures elastic bearing's deformation angle.
the cross section of the connecting seat is U-shaped, through holes are respectively formed in two sides of the connecting seat, when the connecting seat is connected with the elastic bearing, the metal big end of the elastic bearing is placed into the connecting seat, and the bolt penetrates through the through hole in the connecting seat and the channel in the elastic bearing and is fastened.
The tractor is a direct-current speed-regulating motor, a tractor mounting frame is arranged on the side surface above the base, an upper cross beam is arranged above the tractor mounting frame, and a lower cross beam is arranged below the tractor mounting frame; the direct current speed regulating motor is arranged on the lower cross beam, two fixed pulleys with equal size are arranged above the upper cross beam, and the height of each fixed pulley is flush with the traction hole in the connecting seat; equal-length hauling ropes are respectively wound on the fixed pulleys, the tail ends of the hauling ropes are connected to the hauling holes, the other ends of the hauling ropes are connected with connecting blocks, the two connecting blocks are connected through a transmission chain, and the direct-current speed-regulating motor is in power connection with the transmission chain.
a temperature control box is also arranged between the upright posts; the elastic bearing and the connecting seat are positioned in the temperature control box, and the temperature control box is provided with a movable door for facilitating the installation of the elastic bearing; a heating device and a temperature sensor are arranged in the temperature control box, and the heating device and the temperature sensor are respectively and electrically connected with the regulating device;
The outer wall of the temperature control box is also provided with a heat insulation protective layer, and a polyurethane foaming layer is filled in the heat insulation protective layer and used for ensuring that heat in the temperature control box is not dissipated.
the heating device is an electric heating wire or a PTC heater.
The regulating and controlling equipment is a computer or a PLC (programmable logic controller); the regulating and controlling equipment is also provided with a display screen and an input device, and the input device is a keyboard or a display screen with a touch control function.
the hauling cable is a steel wire rope.
The detection method of the environment temperature controllable elastic bearing bending rigidity detection system comprises the following steps:
Step 1: the elastic bearing is arranged on the connecting seat and the bearing base, wherein the large metal end is connected with the connecting seat through a bolt, and the small metal end is connected with the bearing base through a bolt;
step 2: keeping the traction rope and the tractor in a pre-tightening state;
and step 3: heating the heating device to a preset temperature and keeping the temperature constant;
And 4, step 4: starting the direct current speed regulating motor, regulating the rotating speed and the rotating direction of the direct current speed regulating motor to enable the direct current speed regulating motor to slowly rotate clockwise, driving a transmission chain and a traction rope, and driving a connecting seat and an elastic bearing to generate bending deformation;
and 5: the connecting seat drives the torsion rod to synchronously twist through the linkage rod, the torsion rod drives the angle sensor to synchronously twist, and the regulating and controlling equipment records the tension value and the twisting angle in real time;
Step 6: the regulating and controlling equipment stops the direct-current speed regulating motor after the recorded torsion angle value reaches 30 degrees, and slowly returns to the original position;
and 7: adjusting the rotation direction of the direct current speed regulating motor to enable the direct current speed regulating motor to slowly rotate anticlockwise, and repeating the steps;
and 8: the bending stiffness calculation principle is as follows: the bending stiffness is the ability of the characterizing structure to resist bending deformation, and the bending stiffness K is:
wherein: for applied torque, rotation angle;
The bending stiffness measuring method is that different loads are applied to the elastic bearing, the rotating angle under the corresponding load is measured, and then the bending stiffness is obtained by adopting the following formula to calculate and combining a curve fitting mode. The calculation formula of the bending stiffness is as follows:
wherein, the two different moments (Nm) are two different moments (Nm), the two different load quantities (N) are two different load quantities (N), and the rotation angles correspond to different loads.
The significance of the invention is as follows: the bending rigidity performance test of the elastic bearing at different temperatures is realized, and the bending rigidity of a single elastic bearing along with the temperature change value and the bending rigidity at constant temperature can be accurately measured.
drawings
FIG. 1 is a perspective view of an environmental temperature controllable elastic bearing bending stiffness detection system in use;
FIG. 2 is a schematic diagram of a front view of an elastic bearing mounted on a connecting seat and a bearing base in the system for detecting bending stiffness of an elastic bearing with controllable environmental temperature according to the present invention;
FIG. 3 is a schematic diagram of a side view of an elastic bearing mounted on a connecting seat and a bearing base in an environmental temperature controllable elastic bearing bending stiffness detection system according to the present invention;
FIG. 4 is a schematic diagram of a three-dimensional state of an elastic bearing mounted on a connecting seat and a bearing base in the system for detecting bending stiffness of an elastic bearing with controllable environmental temperature according to the present invention;
fig. 5 is a schematic structural view of the elastic bearing of the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 to 5.
an elastic bearing bending rigidity detection system with controllable environmental temperature is provided with a machine base 1 and a machine case 2, wherein regulation and control equipment is arranged in the machine case 2, stand columns 3 are respectively arranged on two sides above the machine base 1, a cross beam 4 is arranged at the top end between the stand columns 3, an upper chuck 5 is arranged in the middle part below the cross beam 4, and a lower chuck 6 corresponding to the upper chuck 5 is arranged between the stand columns 3 on the machine base 1; the upper chuck 5 and the lower chuck 6 are both provided with interfaces, a bearing base 7 can be connected between the interfaces, the middle part of the bearing base 7 is provided with a jack 7-1, and an equipment bin 8 is arranged below the jack 7-1; an angle sensor 9 is arranged in the equipment bin 8, the angle sensor 9 is connected with a torsion bar 10 in the horizontal direction, the tail end of the torsion bar 10 is connected with a linkage bar 11 perpendicular to the torsion bar, the linkage bar 11 is fixedly connected to a connecting seat 12, and two ends of an elastic bearing 13 are respectively connected with the connecting seat 12 and a bearing base 7; two sides of the connecting seat 12 are respectively provided with a traction hole 12-1, the traction hole 12-1 is connected with a tractor 15 through a traction rope 14 or a traction rod, and the tractor 15 is electrically connected with a regulating device; the retractor 15 can apply traction force to the connecting seat 12, so as to apply pressure to the elastic bearing 13, the elastic bearing 13 is elastically deformed after receiving the pressure, so as to drive the torsion rod 10 to twist, and the angle sensor 9 detects the deformation angle of the elastic bearing 13.
the cross section of the connecting seat 12 is U-shaped, through holes are respectively arranged on two sides of the connecting seat 12, when the connecting seat 12 is connected with the elastic bearing 13, the metal big end 13-2 of the elastic bearing 13 is placed into the connecting seat 12, and the bolt 16 penetrates through the through hole in the connecting seat 12 and the channel 13-1 in the elastic bearing 13 and is fastened.
The tractor 15 is a direct-current speed-regulating motor, a tractor mounting frame 17 is arranged on the side surface above the base 1, an upper cross beam 18 is arranged above the tractor mounting frame 17, and a lower cross beam 19 is arranged below the tractor mounting frame 17; the direct current speed regulating motor is arranged on the lower cross beam 19, two fixed pulleys 20 with the same size are arranged above the upper cross beam 18, and the height of each fixed pulley 20 is flush with the traction hole 12-1 on the connecting seat 12; the fixed pulleys 20 are respectively wound with hauling ropes 14 with equal length, the tail ends of the hauling ropes 14 are connected to the hauling holes 12-1, the other ends of the hauling ropes 14 are connected with connecting blocks 21, the two connecting blocks 21 are connected through a transmission chain 22, and the direct-current speed-regulating motor is in power connection with the transmission chain 22.
a temperature control box 23 is also arranged between the upright posts 3; the elastic bearing 13 and the connecting seat 12 are positioned in a temperature control box 23, and a movable door is arranged on the temperature control box 23 and is used for facilitating the installation of the elastic bearing 13; a heating device and a temperature sensor are arranged in the temperature control box 23, and the heating device and the temperature sensor are respectively and electrically connected with the regulating device;
The outer wall of the temperature control box 23 is also provided with a heat insulation protective layer, and a polyurethane foaming layer is filled in the heat insulation protective layer and used for ensuring that heat in the temperature control box 23 is not dissipated.
the heating device is an electric heating wire or a PTC heater.
The regulating and controlling equipment is a computer or a PLC (programmable logic controller); the control device is further provided with a display screen 24 and an input device, wherein the input device is a keyboard or a display screen with a touch function.
The hauling cable 14 is a steel wire rope.
the detection method of the environment temperature controllable elastic bearing bending rigidity detection system comprises the following steps:
step 1: installing an elastic bearing 13 on the connecting seat 12 and the bearing base 7, wherein the metal big head end 13-2 is connected with the connecting seat 12 through a bolt, and the metal small head end 13-3 is connected with the bearing base 7 through a bolt;
step 2: maintaining the pull-cord 14 and the retractor 15 in a pre-tensioned state;
and step 3: heating the heating device to a preset temperature and keeping the temperature constant;
And 4, step 4: starting the direct current speed regulating motor, regulating the rotating speed and the rotating direction of the direct current speed regulating motor to enable the direct current speed regulating motor to slowly rotate clockwise, driving a transmission chain and a traction rope, and driving a connecting seat and an elastic bearing to generate bending deformation;
And 5: the connecting seat 12 drives the torsion bar 10 to synchronously twist through the linkage bar 11, the torsion bar 10 drives the angle sensor 9 to synchronously twist, and the regulating and controlling equipment records the tension value and the twisting angle in real time;
step 6: the regulating and controlling equipment stops the direct-current speed regulating motor after the recorded torsion angle value reaches 30 degrees, and slowly returns to the original position;
And 7: adjusting the rotation direction of the direct current speed regulating motor to enable the direct current speed regulating motor to slowly rotate anticlockwise, and repeating the steps;
And 8: the bending stiffness calculation principle is as follows: the bending stiffness is the ability of the characterizing structure to resist bending deformation, and the bending stiffness K is:
Wherein: for applied torque, rotation angle;
the bending stiffness measuring method is that different loads are applied to the elastic bearing, the rotating angle under the corresponding load is measured, and then the bending stiffness is obtained by adopting the following formula to calculate and combining a curve fitting mode. The calculation formula of the bending stiffness is as follows:
Wherein, the two different moments (Nm) are two different moments (Nm), the two different load quantities (N) are two different load quantities (N), and the rotation angles correspond to different loads.
Claims (9)
1. The utility model provides a controllable elastic bearing bending stiffness detecting system of ambient temperature, has frame and quick-witted case, its characterized in that: the machine case is internally provided with a regulating device, two sides above the machine base are respectively provided with an upright post, the top end between the upright posts is provided with a cross beam, the middle part below the cross beam is provided with an upper chuck, and a lower chuck corresponding to the upper chuck is arranged between the upright posts on the machine base; the upper chuck and the lower chuck are both provided with interfaces, a bearing base can be connected between the interfaces, the middle part of the bearing base is provided with an insertion hole, and an equipment bin is arranged below the insertion hole; an angle sensor is arranged in the equipment bin and connected with a torsion bar in the horizontal direction, the tail end of the torsion bar is connected with a linkage bar perpendicular to the torsion bar, the linkage bar is fixedly connected to a connecting seat, and two ends of an elastic bearing are respectively connected with the connecting seat and a bearing base; the two sides of the connecting seat are respectively provided with a traction hole, the traction holes are connected with a tractor through traction ropes or traction rods, and the tractor is electrically connected with the regulating and controlling equipment; traction force can be exerted to the connecting seat by the tractor, and then pressure is exerted on the elastic bearing, and the elastic bearing generates elastic deformation after receiving the pressure, and then drives the torsion bar to twist reverse, and the angle sensor measures elastic bearing's deformation angle.
2. the system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 1, wherein: the cross section of the connecting seat is U-shaped, through holes are respectively formed in two sides of the connecting seat, when the connecting seat is connected with the elastic bearing, the metal big end of the elastic bearing is placed into the connecting seat, and the bolt penetrates through the through hole in the connecting seat and the channel in the elastic bearing and is fastened.
3. The system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 1, wherein: the tractor is a direct-current speed-regulating motor, a tractor mounting frame is arranged on the side surface above the base, an upper cross beam is arranged above the tractor mounting frame, and a lower cross beam is arranged below the tractor mounting frame; the direct current speed regulating motor is arranged on the lower cross beam, two fixed pulleys with equal size are arranged above the upper cross beam, and the height of each fixed pulley is flush with the traction hole in the connecting seat; equal-length hauling ropes are respectively wound on the fixed pulleys, the tail ends of the hauling ropes are connected to the hauling holes, the other ends of the hauling ropes are connected with connecting blocks, the two connecting blocks are connected through a transmission chain, and the direct-current speed-regulating motor is in power connection with the transmission chain.
4. the system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 1, wherein: a temperature control box is also arranged between the upright posts; the elastic bearing and the connecting seat are positioned in the temperature control box, and the temperature control box is provided with a movable door for facilitating the installation of the elastic bearing; and a heating device and a temperature sensor are arranged in the temperature control box, and the heating device and the temperature sensor are respectively electrically connected with the regulating and controlling device.
5. The system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 4, wherein: the outer wall of the temperature control box is also provided with a heat insulation protective layer, and a polyurethane foaming layer is filled in the heat insulation protective layer and used for ensuring that heat in the temperature control box is not dissipated.
6. the system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 4, wherein: the heating device is an electric heating wire or a PTC heater.
7. The system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 1, wherein: the regulating and controlling equipment is a computer or a PLC (programmable logic controller); the regulating and controlling equipment is also provided with a display screen and an input device, and the input device is a keyboard or a display screen with a touch control function.
8. The system for detecting bending stiffness of an elastic bearing with controllable ambient temperature according to claim 1, wherein: the hauling cable is a steel wire rope.
9. a detection method of an environment temperature controllable elastic bearing bending rigidity detection system is characterized by comprising the following steps:
step 1: the elastic bearing is arranged on the connecting seat and the bearing base, wherein the large metal end is connected with the connecting seat through a bolt, and the small metal end is connected with the bearing base through a bolt;
Step 2: keeping the traction rope and the tractor in a pre-tightening state;
and step 3: heating the heating device to a preset temperature and keeping the temperature constant;
and 4, step 4: starting the direct current speed regulating motor, regulating the rotating speed and the rotating direction of the direct current speed regulating motor to enable the direct current speed regulating motor to slowly rotate clockwise, driving a transmission chain and a traction rope, and driving a connecting seat and an elastic bearing to generate bending deformation;
and 5: the connecting seat drives the torsion rod to synchronously twist through the linkage rod, the torsion rod drives the angle sensor to synchronously twist, and the regulating and controlling equipment records the tension value and the twisting angle in real time;
Step 6: the regulating and controlling equipment stops the direct-current speed regulating motor after the recorded torsion angle value reaches 30 degrees, and slowly returns to the original position;
And 7: adjusting the rotation direction of the direct current speed regulating motor to enable the direct current speed regulating motor to slowly rotate anticlockwise, and repeating the steps;
And 8: the bending stiffness calculation principle is as follows: the bending stiffness is the ability of the characterizing structure to resist bending deformation, and the bending stiffness K is:
wherein: for applied torque, rotation angle;
The bending stiffness measuring method comprises the steps of applying different loads to the elastic bearing, measuring a rotating angle under the corresponding load, and then calculating by adopting the following formula and combining a curve fitting mode to obtain the bending stiffness;
the calculation formula of the bending stiffness is as follows:
wherein, the two different moments (Nm) are two different moments (Nm), the two different load quantities (N) are two different load quantities (N), and the rotation angles correspond to different loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910664107.9A CN110542523A (en) | 2019-07-23 | 2019-07-23 | Environmental temperature controllable elastic bearing bending stiffness detection system and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910664107.9A CN110542523A (en) | 2019-07-23 | 2019-07-23 | Environmental temperature controllable elastic bearing bending stiffness detection system and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN110542523A true CN110542523A (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910664107.9A Pending CN110542523A (en) | 2019-07-23 | 2019-07-23 | Environmental temperature controllable elastic bearing bending stiffness detection system and detection method |
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| CN (1) | CN110542523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509226A (en) * | 2022-04-06 | 2022-05-17 | 天津航天瑞莱科技有限公司 | Metal rubber bearing bending rigidity test device under high and low temperature environment |
-
2019
- 2019-07-23 CN CN201910664107.9A patent/CN110542523A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509226A (en) * | 2022-04-06 | 2022-05-17 | 天津航天瑞莱科技有限公司 | Metal rubber bearing bending rigidity test device under high and low temperature environment |
| CN114509226B (en) * | 2022-04-06 | 2022-07-22 | 天津航天瑞莱科技有限公司 | Metal rubber bearing bending rigidity test device under high and low temperature environment |
| WO2023193350A1 (en) * | 2022-04-06 | 2023-10-12 | 天津航天瑞莱科技有限公司 | Bending rigidity test device for metal rubber bearing in high and low temperature environment |
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