CN112082758B - Electromagnetic vibration gear bending fatigue test bench - Google Patents
Electromagnetic vibration gear bending fatigue test bench Download PDFInfo
- Publication number
- CN112082758B CN112082758B CN202011040606.XA CN202011040606A CN112082758B CN 112082758 B CN112082758 B CN 112082758B CN 202011040606 A CN202011040606 A CN 202011040606A CN 112082758 B CN112082758 B CN 112082758B
- Authority
- CN
- China
- Prior art keywords
- gear
- loading unit
- vibration
- connecting plate
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
-
- 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
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses an electromagnetic vibration gear bending fatigue test bed. The device comprises a servo motor, a base, a measuring system, an electromagnetic resonance system, a variable mass excitation system and the like, wherein the servo motor is connected with a ball screw, the ball screw is connected to the base, the bottom of the base is connected with the ground through a spring, two guide holes are formed in the base, a guide rod is arranged on the base, the upper portion of the electromagnetic resonance system is connected with the variable mass system, the middle portion of the electromagnetic resonance system is connected with an upper connecting plate through the spring, the lower portion of the electromagnetic resonance system is connected with a loading unit, and a test sample is arranged between the loading unit and the base. The invention can effectively isolate the influence of an environmental vibration source on equipment and the influence of the equipment on the surrounding environment, realizes the loading of a sample through electromagnetic vibration, is provided with a strain gauge, can monitor the tooth root stress and the loaded resonance frequency in real time, and accurately judges and obtains the damage condition of the gear through the change of the tooth root stress and the vibration frequency. The invention is provided with an environment box, and can perform fatigue test under high-temperature or low-temperature environment.
Description
Technical Field
The invention relates to a gear test device in the technical field of mechanical fatigue test devices, in particular to an electromagnetic vibration gear bending fatigue test bed and a fatigue test method.
Background
The gear transmission has wide application in the fields of automobiles, engineering machinery, aerospace and the like, the fatigue strength of the gear has decisive influence on the safety and reliability of the whole transmission system, and the gear fatigue test bed can develop the fatigue characteristic of the gear. Along with the improvement of the requirements of various industries on gear transmission equipment, the research and development of the gear fatigue test bed have urgent demands and practical values.
When a gear bending fatigue test is carried out, the load loaded on the gear teeth is a force tangential to a base circle, and the tooth root stress is required to be calculated according to an analytic method, but the calculated value often has a certain difference from a true value, and the tooth root bending stress cannot be directly measured by the conventional test bed. Some gears operate at a specific ambient temperature, but none of the existing devices are capable of performing bending fatigue tests in a specific environment. Therefore, the invention provides an electromagnetic vibration gear bending fatigue test bed for realizing real-time measurement of tooth root stress in the test process and heating or cooling the gear in the test process, and solving the problems in the prior art.
Disclosure of Invention
Aiming at the problems, the invention provides an electromagnetic vibration gear bending fatigue test bed, which is characterized in that a row of elastic wires are led out from a vibration connecting plate, the tail end of each wire is connected with a strain gauge, and the strain gauge is directly attached to the dangerous section of the tooth root after the gear is installed, so that the real-time monitoring and dynamic recording of the tooth root stress in the test process are realized, the calculation error caused by the calculation of an analytic method is avoided, and the accuracy of the test result is improved.
In order to solve the problems, the invention provides the following technical scheme:
The invention comprises a variable mass excitation system, an electromagnetic resonance system, a servo motor and a base; the variable mass excitation system is fixedly arranged at the upper end of the electromagnetic vibration system, the lower end of the electromagnetic vibration system penetrates through the upper connecting plate and then is connected with the middle part of the vibration connecting plate, the two sides of the variable mass excitation system are respectively connected with the upper ends of the two connecting springs, the lower ends of the two connecting springs penetrate through the upper connecting plate and then are connected with the two sides of the vibration connecting plate, and the two sides of the top surface of the vibration connecting plate are connected with the bottom surface of the upper connecting plate through preloaded springs; the lower end face of the vibration connecting plate is fixedly provided with a force sensor, the probe end of the force sensor faces downwards and is fixedly provided with an upper loading unit, the lower end face of the vibration connecting plate is simultaneously connected with a measuring system, the measuring system comprises a plurality of groups of strain components, each strain component comprises an elastic wire and a strain piece, the upper end of the elastic wire is fixedly connected to the lower end face of the vibration connecting plate, the lower end of the elastic wire is fixedly connected with the strain piece, the strain piece is attached to a test gear, a working platform is fixedly arranged at the top of a base, the base is fixedly coupled and fixed on a foundation through a grounding spring, the top surface of the working platform is fixedly provided with a lower loading unit, the lower loading unit is positioned under the upper loading unit, an environment box is arranged between the lower loading unit and the upper loading unit, the lower loading unit and the environment box are connected, the upper end of the lower loading unit and the lower end of the upper loading unit extend into the environment box and are connected with the test gear in the environment box, the base is internally provided with the lower connecting plate, a ball screw, a servo motor and a speed reducer are fixedly connected with the two sides of the bottom of the upper connecting plate through two sides of a guide rod which movably pass through the working platform and the top of the lower connecting plate, the ball screw is vertically arranged and the middle part is sleeved in a threaded hole in the middle of the lower connecting plate to form a screw nut pair, the lower end of the ball screw is connected with the servo motor through a speed reducer.
The test gear is arranged on the gear support and is positioned in the environment box, the test gear can move up and down and rotate relative to the gear support, and the gear support is arranged on the working platform.
The strain gauge is fixedly attached to the side surface of the tooth root of the test gear, and the edges of the upper loading unit and the lower loading unit are both attached to the side surface of the tooth top of the test gear.
The variable mass excitation system is mainly formed by vertically and fixedly installing 4 mass blocks.
The speed reducer mainly comprises a worm wheel, a worm and a box body, wherein the worm wheel is coaxially arranged at the lower end of the ball screw, the worm wheel is meshed with the worm, and the worm is connected with the output end of the servo motor.
The speed reducer and the servo motor are integrated, and the worm and the output shaft of the servo motor are integrated.
The environment box mainly comprises a box body, and a heater, a cooling pipe and a temperature sensor which are arranged on the box body, wherein the heater, the cooling pipe and the temperature sensor are all arranged on the inner side surface of the box body.
The invention designs a stable, reliable and effective electromagnetic vibration structure, and is combined in a gear bending fatigue test, thereby realizing a stable and excellent gear bending fatigue test.
The beneficial effects of the invention are as follows:
The floating workbench can effectively isolate the influence of an environmental vibration source on equipment and the influence of the equipment on the surrounding environment.
According to the invention, the loading of the test sample is realized through electromagnetic vibration, the measuring system is provided with the strain gauge, the tooth root stress and the loading frequency can be monitored in real time, the damage condition of the tooth root of the gear can be judged through the change of the tooth root stress and the vibration frequency, and the automatic stop can be realized when the gear tooth breaks.
According to the invention, the gear is placed in the environment box, the temperature box is filled with lubricating oil with a certain liquid level, the gear is immersed in the lubricating oil, the lubricating oil can be heated and cooled through the heater and the cooling pipe, and the gear is indirectly heated or cooled, so that the bending fatigue test under a specific environment temperature is realized.
According to the invention, the test is carried out by the resonance principle, the bending fatigue strength of the gear sample can be rapidly obtained by the higher test frequency, and the development period is reduced.
The variable mass excitation system is arranged at the upper end of the electromagnetic vibration system and is fixedly arranged at the upper end of the electromagnetic vibration system, the variable mass excitation system is vertically and fixedly arranged together by a plurality of mass blocks, and the resonance frequency in the test can be changed by disassembling and assembling the mass blocks, so that the loading requirements of different frequencies are realized.
According to the invention, the test gear is arranged on the gear bracket, and can move up and down and rotate relative to the gear bracket, so that the test gear can be quickly replaced by a real gear sample, and the test of gears with different specifications can be met.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a gear assembly of the present invention;
FIG. 3 is a schematic view of a strain gauge mounting of the present invention;
Fig. 4 is a schematic diagram of the transmission parts of the speed reducer of the invention.
The device comprises a variable mass excitation system, an electromagnetic resonance system, a connecting spring, a 4, an upper connecting plate, a 5, a pre-loading spring, a 6, a vibration connecting plate, a 7, an upper loading unit, a 8, a lower loading unit, a 9, a guide rod, a 10, a working platform, a11, a lower connecting plate, a 12, a ball screw, a 13, a speed reducer, a 14, a servo motor, a 15, a grounding spring, a 16, a base, a 17, a worm, a 18, a worm wheel, a 19, an environment box, a 20, a test gear, a 21, a strain gauge, a 22, an elastic wire, a 23, a force sensor, a 24, a measuring system, a 25, a gear bracket, a 26, a heater, a 27, a cooling pipe, a 28 and a temperature sensor.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
As shown in figure 1, the test bed comprises a variable mass excitation system 1, an electromagnetic resonance system 2, a servo motor 14 and a base 16, wherein the variable mass excitation system 1 is fixedly arranged at the upper end of the electromagnetic vibration system 2, the lower end of the electromagnetic vibration system 2 penetrates through an upper connecting plate 4 and then is connected with the middle part of a vibration connecting plate 6, in the test bed, the bottom surface of the middle part of the variable mass excitation system 1 is connected with the electromagnetic vibration system 2 through bolts, two sides of the variable mass excitation system 1 are respectively connected with the upper ends of two connecting springs 3, the lower ends of the two connecting springs 3 penetrate through the upper connecting plate 4 and then are connected with the two sides of the vibration connecting plate 6, the two sides of the top surface of the vibration connecting plate 6 are respectively connected with the bottom surface of the upper connecting plate 4 through a preloading spring 5, in this way, the vibration connecting plate 6 is further connected with the upper connecting plate 4 through the preloading spring 5 in a coupling way, and the acting force generated by the electromagnetic resonance system 2 is transmitted to the vibration connecting plate 4 through the variable mass system 1 and the connecting springs 3. The variable mass excitation system 1 and the vibration connecting plate 6 are connected together through the electromagnetic vibration system 2 and the two connecting springs 3 to form an integral electromagnetic vibration structure, and the integral electromagnetic vibration structure is elastically and floatingly connected to the upper connecting plate 4 through the preloading springs 5.
The lower end face of the vibration connecting plate 6 is fixedly provided with a force sensor 23, the probe end of the force sensor 23 faces downwards and is fixedly provided with an upper loading unit 7, the lower end face of the vibration connecting plate 6 is simultaneously connected and provided with a measuring system 24, the measuring system 24 comprises a plurality of groups of strain components, each strain component comprises an elastic wire 22 and a strain gauge 21 connected to the end part of the elastic wire 22, the upper end of the elastic wire 22 is fixedly connected to the lower end face of the vibration connecting plate 6, the lower end of the elastic wire 22 is fixedly connected with the strain gauge 21, and the strain gauge 21 is stuck on the test gear 20 in a pouring manner during a test.
The working platform 10 is fixedly arranged at the top of the base 16, the base 16 is fixedly coupled to the foundation through a group of grounding springs 15, the top surface of the working platform 10 is fixedly provided with a lower loading unit 8, the lower loading unit 8 is positioned right below the upper loading unit 7, the base 16 is hollow, a lower connecting plate 11, a ball screw 12, a servo motor 14 and a speed reducer 13 are arranged in the base 16, two sides of the bottom of the upper connecting plate 4 are fixedly connected with two sides of the top of the lower connecting plate 11 through guide rods 9 which movably penetrate through the working platform 10, the lower ends of the guide rods 9 penetrate through guide holes in the working platform 10 and then are connected with the lower connecting plate 11, the upper end and the lower end of the ball screw 12 are respectively arranged on the working platform 10 and in the base 16 through bearings, the middle part of the ball screw 12 is sleeved in a threaded hole in the middle of the lower connecting plate 11 through threads to form a screw nut pair, the lower end of the ball screw 12 is connected with the servo motor 14 through the speed reducer 13, and the speed reducer 13 and the servo motor 14 are respectively arranged on the base 16. The speed reducer 13 and the servo motor 14 are integrated, and the worm 17 and the output shaft of the servo motor 14 are integrated.
The servo motor 14 runs and drives the ball screw 12 to rotate through the speed reducer 13, then drives the upper connecting plate 4 and the lower connecting plate 11 to lift and move under the guide of the guide rod 9 through the screw nut pair, and then drives the upper loading unit 7 connected with the vibration connecting plate 6 on the upper connecting plate 4 to lift and move, and adjusts the distance between the upper loading unit 7 and the lower loading unit 8, so that the upper loading unit 7 moves up and down near or far away from the lower loading unit 8.
As shown in fig. 2, the test gear 20 is mounted on a gear bracket 25, the test gear 20 can move up and down and rotate relative to the gear bracket 25, and the gear bracket 25 is mounted on the work platform 10.
As shown in fig. 3, the strain gauge 21 is fixedly attached to the tooth root side surface of the test gear 20, and the strain gauge is directly attached to the dangerous section of the tooth root after the gear is mounted, the test gear 20 is positioned at one side between the upper loading unit 7 and the lower loading unit 8, and the edges of the upper loading unit 7 and the lower loading unit 8 are respectively attached to the tooth tip side surface of the test gear 20.
The variable mass excitation system 1 is mainly formed by vertically and fixedly installing 4 mass blocks, and the mass of the variable mass excitation system 1 is changed by disassembling and assembling the mass blocks.
As shown in fig. 4, the speed reducer 13 mainly comprises a worm wheel 18, a worm 17 and a box body, the worm wheel 18 is coaxially arranged at the lower end of the ball screw 12, the worm wheel 18 is meshed with the worm 17, and the worm 17 is connected with the output end of the servo motor 14.
The working process of the electromagnetic vibration gear bending fatigue test device is as follows:
the sizes of the test gears 20 are different, and the servo motor 14 drives the upper loading unit 7 to move up and down, so that the distance between the upper loading unit 7 and the lower loading unit 8 is matched with the size of the test gears 20, and the edges of the upper loading unit 7 and the lower loading unit 8 are tightly attached to the tooth top side surfaces of the upper side teeth and the lower side teeth of the test gears 20.
The test gear 20 is placed in an environment box 19, the environment box 19 is filled with lubricating oil with a certain liquid level, the test gear 20 is immersed in the lubricating oil, the lubricating oil can be heated or cooled through a heater 26 and a cooling pipe 27 to provide a specific test temperature, the test temperature can be monitored through a temperature sensor 28, and when no special test temperature is required, the lubricating oil is discharged, and the heater 26 and the cooling pipe 27 are closed.
And the pressure is detected in real time through the force sensor 23 to obtain the feedback force, the servo motor 14 is controlled in a feedback way by the feedback force, and the distance between the upper loading unit 7 and the lower loading unit 8 is driven and adjusted, so that the contact pressure between the edges of the upper loading unit 7 and the lower loading unit 8 and the surface of the test gear 20 is within a preset range.
The strain gauge 21 is then adhesively attached to the tooth root side surface of the same tooth on the tooth tip side surface to which the edge of the upper loading unit 7 is attached by the elastic wire 22 after elongation, and the strain gauges 21 of the plurality of strain assemblies are arranged axially along the test gear 20, i.e., at intervals along the tooth root.
The electromagnetic resonance system 2 is started, under the fixed variable mass excitation system 1, the electromagnetic resonance system 2 vibrates slightly at a small amplitude frequency, and after being conducted to the upper loading unit 7 through the vibration connecting plate 6 and the force sensor 23, the test gear 20 is driven to vibrate in a bending fatigue mode, and the test gear 20 is gradually driven to vibrate at a resonance frequency under the operation control of the electromagnetic resonance system 2.
The resonance frequency is obtained through real-time detection of the electromagnetic resonance system 2, the stress of the tooth root surface of the test gear 20 is detected through the strain gauge 21 in real time, and the fatigue test parameters are obtained after continuous testing until the test gear 20 fails.
A bending fatigue test relation model is established among the resonance frequency, stress and fatigue test parameters, the test gear 20 to be tested is tested through the relation model, an accurate fatigue test parameter result of the test gear 20 is obtained, the fatigue damage condition of the test gear is obtained, calculation errors caused by calculation by an analytical method are avoided, and the accuracy of the test result is improved. In the specific implementation, the fatigue test parameters are calculated by adopting a cycle number meter.
The application quality of the variable mass excitation system 1 is changed, repeated steps are tested under the condition that the variable mass excitation system 1 has different masses, more series of test data of resonance frequency, stress and fatigue test parameters are obtained, further a bending fatigue test relation model under the influence of different masses can be obtained, accurate measurement results of wider application scenes are realized, and the effectiveness of the test results is improved.
When special requirements are made on the test environment, the test gear is heated or cooled through the environment box 19, a series of fatigue test data under high temperature or low temperature states are obtained, further bending fatigue test relation models under different test temperatures are obtained, and the application of the fatigue data under the multi-environment conditions is realized.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040606.XA CN112082758B (en) | 2020-09-28 | 2020-09-28 | Electromagnetic vibration gear bending fatigue test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011040606.XA CN112082758B (en) | 2020-09-28 | 2020-09-28 | Electromagnetic vibration gear bending fatigue test bench |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112082758A CN112082758A (en) | 2020-12-15 |
| CN112082758B true CN112082758B (en) | 2025-01-07 |
Family
ID=73738506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011040606.XA Active CN112082758B (en) | 2020-09-28 | 2020-09-28 | Electromagnetic vibration gear bending fatigue test bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112082758B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046989B (en) * | 2021-11-10 | 2022-08-19 | 燕山大学 | Gear durability experimental device and process method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213121104U (en) * | 2020-09-28 | 2021-05-04 | 浙江双环传动机械股份有限公司 | Electromagnetic vibration gear bending fatigue test bench |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512803B (en) * | 2013-09-26 | 2016-08-17 | 吉林大学 | Multi-load multiple physical field coupling material Micro Mechanical Properties in-situ test instrument |
| CN108627333A (en) * | 2018-07-19 | 2018-10-09 | 中国人民解放军陆军装甲兵学院 | Fatigue test electromagnetic exciting loading device |
| CN109283075A (en) * | 2018-11-07 | 2019-01-29 | 连云港中复连众复合材料集团有限公司 | Servo motor driven wind turbine blade fatigue test excitation device and test method |
| CN111649926B (en) * | 2020-06-08 | 2022-05-17 | 中国航发北京航空材料研究院 | Axial and vibration high-low cycle composite fatigue test device |
-
2020
- 2020-09-28 CN CN202011040606.XA patent/CN112082758B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213121104U (en) * | 2020-09-28 | 2021-05-04 | 浙江双环传动机械股份有限公司 | Electromagnetic vibration gear bending fatigue test bench |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112082758A (en) | 2020-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106990007B (en) | Method and device for testing relation between residual stress of material and surface hardness | |
| Hong et al. | A rotating gear test methodology for evaluation of high-cycle tooth bending fatigue lives under fully reversed and fully released loading conditions | |
| CN108548776B (en) | Rubber material surface friction performance testing device | |
| CN104697787B (en) | A kind of gearbox test-bed and its detection method based on multi-information fusion | |
| KR101227772B1 (en) | Wholesomeness test equipment for enclosed type spring hanger | |
| CN104931366A (en) | A fretting fatigue test method and its testing machine with real-time adjustable contact load | |
| CN105651511A (en) | Experimental apparatus for dynamic performances of cylindrical gear | |
| CN110031216A (en) | A kind of gear pair comprehensive characteristic test device and method that any crossed axis angle can be achieved | |
| CN104297287A (en) | Compression heat generation detector and method thereof | |
| CN110160906B (en) | Reciprocating friction and wear testing machine with lubricating and compound force loading system | |
| CN110208122B (en) | An accelerated test method for wear resistance reliability of robot wire harness | |
| CN108426795A (en) | High speed scroll contact fatique wear testing stand | |
| CN106017959A (en) | Lead screw guide rail reliability testing stand based on electro-hydraulic servo loading | |
| CN112082758B (en) | Electromagnetic vibration gear bending fatigue test bench | |
| CN205808825U (en) | A kind of electronics tensile and compression testing machine | |
| CN102252790A (en) | Flow adjustable reciprocating pump crankshaft impact load on-line real-time detection device | |
| CN108414221B (en) | A test method for torque converter end cover torsional fatigue strength | |
| CN220508686U (en) | A horizontal impact test equipment | |
| CN113432872A (en) | Device and method for testing frictional wear characteristics of downhole thrust bearing under impact load | |
| CN213121104U (en) | Electromagnetic vibration gear bending fatigue test bench | |
| CN206020024U (en) | Lead screw guide rails reliability test bench based on electro-hydraulic loading | |
| CN208223999U (en) | High speed scroll contact fatique wear testing stand | |
| CN209945869U (en) | Crankshaft reliability test device | |
| CN101261186A (en) | Belt axle assembly and steel belt test stand | |
| CN216523710U (en) | Gas cylinder residual deformation measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20250605 Address after: 314500 Zhejiang Province, Jiaxing City, Tongxiang City, Fengming Street, Wenhu Nan Road No. 1235, Building 2, 3rd Floor Patentee after: Huanyan Transmission Research Institute (Jiaxing) Co.,Ltd. Country or region after: China Address before: 317600 No. 1, Shengyuan Road, Yuhuan Electromechanical industry functional zone, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG SHUANGHUAN DRIVELINE Co.,Ltd. Country or region before: China |
|
| TR01 | Transfer of patent right |