CN202229993U - Bending fatigue tester for multi-throw crank shaft - Google Patents
Bending fatigue tester for multi-throw crank shaft Download PDFInfo
- Publication number
- CN202229993U CN202229993U CN2011202444085U CN201120244408U CN202229993U CN 202229993 U CN202229993 U CN 202229993U CN 2011202444085 U CN2011202444085 U CN 2011202444085U CN 201120244408 U CN201120244408 U CN 201120244408U CN 202229993 U CN202229993 U CN 202229993U
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- China
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- mulit
- clamp body
- balancing weight
- turning crankshaft
- crank shaft
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Abstract
The utility model provides a bending fatigue tester for a multi-throw crank shaft, which comprises a working table, displacement sensors, electromagnetic vibration exciters, a portal frame, balancing weight blocks, a signal control and processing system and the like, wherein, the portal frame, a spring support seat and the electromagnetic vibration exciters are fixed on the working table; the portal frame is connected with the two ends of the multi-throw crank shaft through two extension springs; the middle of the multi-throw crank shaft and the spring support seat are connected through a compression spring; one balancing weight block is fixed on a crank shaft arm clamp body which is fixed on each crank shaft arm of the multi-throw crank shaft; the two electromagnetic vibration exciters are symmetrically arranged at two ends of the multi-throw crank shaft; and the armatures of the electromagnetic vibration exciters are fixed with the two balancing weight blocks at the outermost end of the multi-throw crank shaft; the displacement sensor are fixed on the balancing weight blocks; and the two electromagnetic vibration exciters and the displacement sensors are connected with the signal control and processing system at the same time. The bending fatigue tester provided by the utility model has the advantages of simple structure, convenience in operation, high accuracy and small error, and is suitable for bending fatigue tests of crank shafts in different types.
Description
Technical field
The utility model relates to a kind of mulit-turning crankshaft fatigue bending machine, belongs to crankshaft bending fatigue test field.
Background technology
The security of engineering goods and reliability are the important indicators of technical merit, and reliability in the product design life-span and Problem of Failure produce material impact in the human being's production life, therefore get more and more people's extensive concerning always.Bent axle is as the crucial parts that carry of internal combustion engine, and one of main contents of its reliability are its bending fatigue problems under the high cycle fatigue stress.Research and development are significant to the engine of China to carry out the technical research of mulit-turning crankshaft part reliability.Because crankshaft fatigue the complex nature of the problem; Through the integrity problem of computational analysis bent axle in real work a lot of limitation are arranged also under the prior art level, it is essential with more needed data in the acquisition research to simulate its course of work through test method.The major advantage of test method is can be than the serviceable life of more comprehensive examination bent axle under certain material, structure, manufacturing process and load-up condition, and can directly obtain the actual safety and the fatigue limit of bent axle.
At present, the crankshaft bending fatigue testing machine system equipment during the overwhelming majority is used falls behind, and the subject matter of existence is: the resonance frequency of work is low, causes the testing machine work efficiency low; Be and singly turn testing machine, test can only be turned test successively one by one for mulit-turning crankshaft, has both wasted the time, and causes crankshaft bulk life time result of calculation distortion again is an example with the six throw crankshaft, and whole test will continue about 40 days, and the test findings error is greater than ± 5%; Most of crankshaft bending fatigue testing machine exists two end cranks can not carry out repeated bend test; The poor stability of fatigue tester system long time continuous working, to the test bent axle of different model, it is poor that the mechanical part of equipment is regulated conformability, and the resonance frequency range of adjustment is little.
Summary of the invention
The purpose of the utility model is in order to solve problems such as the existing inefficiency of existing crankshaft bending fatigue testing machine, the poor stability of continuous working, test findings error are big, to provide a kind of ability the more than enough mulit-turning crankshaft fatigue bending machine of test, high-frequency resonant simultaneously that turns.
The purpose of the utility model realizes through following technical scheme:
A kind of mulit-turning crankshaft fatigue bending machine of the utility model comprises: worktable, displacement transducer, electromagnetic exciter, portal frame, extension spring, hook bolt, balancing weight, crank arm clamp body, diameter of axle clamp body, mulit-turning crankshaft, signal controlling and disposal system, spring supporting seat, compression spring;
Worktable bottom is fixed through pedestal and ground, and worktable upper surface is processed with T type groove parallel and that be uniformly distributed with, and the T type groove on worktable passes through T type bolt fixedly portal frame, spring supporting seat, two electromagnetic exciters respectively;
On the portal frame fixing two hook bolts downwards an end of each extension spring identical with specification connect; The other end of two extension springs clamps through the two ends of diameter of axle clamp body and mulit-turning crankshaft respectively; Place compression spring between diameter of axle clamp body of fixing on the main shaft of mulit-turning crankshaft stage casing and the spring supporting seat; Make the main shaft of the mulit-turning crankshaft after fixing parallel, and fixing diameter of axle clamp body and spring supporting seat is being processed with spring screens groove with the compression spring contact position on the main shaft of stage casing with the upper surface of worktable;
Each crank arm difference fixed crankshaft arm clamp body at mulit-turning crankshaft; And the crank arm clamp body has the inner chamber that is complementary with tested crank shaft arm appearance curved surface; Fixed weight piece on the crank throw opposite direction of each crank arm clamp body; Balancing weight and crank arm clamp body are formed the resonance swing arm, and through the quality that balancing weight is regulated the resonance swing arm, resonance swing arm quality and crank arm mass ratio are 2: 1～5: 1;
Two electromagnetic exciters are symmetricly set on the two ends of mulit-turning crankshaft, and two balancing weights of the armature of two electromagnetic exciters and mulit-turning crankshaft outermost end fix, two electromagnetic exciters to the mulit-turning crankshaft input with the resonant excitation of homophase frequently;
Displacement transducer is fixed on the balancing weight; Displacement transducer is used to measure the respond vibration signal of bent axle clamp body resonator system; Two electromagnetic exciters, displacement transducers link to each other with disposal system with signal controlling through lead simultaneously, and the vibration frequency of signal controlling and disposal system control bit displacement sensor also receives the vibration signal of displacement transducer.
The course of work
The resonance frequency of the mulit-turning crankshaft behind at first definite fixed crankshaft arm clamp body and the balancing weight; Signal controlling and disposal system are with this frequency control electromagnetic exciter excitation balancing weight; Make the mulit-turning crankshaft behind fixed crankshaft arm clamp body and the balancing weight produce vibration, be fixed on sensor on the balancing weight with vibration signal real-time Transmission to signal controlling and disposal system, until crackle occurring; Stop excitation, obtain the fatigue lifetime of mulit-turning crankshaft.
Beneficial effect
The utility model is simple in structure; Easy to operate; Because the clamping mode that the positive camber of resonance swing arm and crank arm coincide; Improve the rigidity of swing arm and bent axle joint portion greatly, improved the accuracy of crankshaft bending fatigue test, and improved the resonance frequency of crankshaft bending fatigue testing machine significantly; Turn test simultaneously more and avoided singly turning the error that test produces; Each parts adopts T type groove structure and workbench to fix, and position adjustments is convenient, is suitable for the crankshaft bending fatigue test of different model.
Description of drawings
Fig. 1 is the structural representation of the utility model mulit-turning crankshaft fatigue bending machine;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is that the A-A of Fig. 1 is to cut-open view;
Fig. 4 is that the B-B of Fig. 1 is to cut-open view;
Fig. 5 is that the C-C of Fig. 1 is to cut-open view;
Wherein: the 1-worktable; The 2-displacement transducer; The 3-electromagnetic exciter; The 4-portal frame; The 5-extension spring; The 6-hook bolt; The 7-balancing weight; 8-crank arm clamp body; 9-diameter of axle clamp body; 10-signal controlling and disposal system; The 11-mulit-turning crankshaft; 12-spring supporting seat; The 13-compression spring; 14-T type bolt.
Embodiment
Below in conjunction with accompanying drawing and embodiment the content of the utility model is further specified:
Embodiment
A kind of mulit-turning crankshaft fatigue bending machine of the utility model; With the six throw crankshaft is example; Its structure is as shown in Figure 1, comprising: worktable 1, displacement transducer 2, electromagnetic exciter 3, portal frame 4, extension spring 5, hook bolt 6, balancing weight 7, crank arm clamp body 8, diameter of axle clamp body 9, signal controlling and disposal system 10, mulit-turning crankshaft 11, spring supporting seat 12, compression spring 13;
On the portal frame 4 fixing two hook bolts 6 downwards an end of each extension spring 5 identical with specification connect; The other end of two extension springs clamps through the two ends of diameter of axle clamp body and mulit-turning crankshaft 11 respectively; Place compression spring 13 between diameter of axle clamp body of fixing on the mulit-turning crankshaft 11 stage casing main shafts and the spring supporting seat 12; Make the main shaft of the mulit-turning crankshaft 11 after fixing parallel, and fixing diameter of axle clamp body and spring supporting seat 12 is being processed with spring screens groove with compression spring 13 contact positions on the main shaft of stage casing with the upper surface of worktable;
Each crank arm difference fixed crankshaft arm clamp body 8 at mulit-turning crankshaft 11; And crank arm clamp body 8 has the inner chamber that is complementary with tested crank shaft arm appearance curved surface, fixed weight piece 7 on the crank throw opposite direction of each crank arm clamp body, and balancing weight 7 is formed the resonance swing arms with crank arm clamp body 8; The quality of balancing weight quality is 4.67Kg; Resonance swing arm quality is 17.15kg, and the crank arm quality is 6.14kg, and resonance swing arm quality is 2.8 times of crank arm quality;
Two electromagnetic exciters are symmetricly set on the two ends of mulit-turning crankshaft 11, and two balancing weights of the armature of two electromagnetic exciters and mulit-turning crankshaft 11 outermost end are fixed two resonant excitations that electromagnetic exciters are imported with the frequency homophase mulit-turning crankshaft 11;
The course of work
Resonance frequency through the six throw crankshaft behind definite fixed crankshaft arm clamp body 8 and the balancing weight 7 is 146 hertz; Signal controlling and disposal system 10 are with this frequency control electromagnetic exciter excitation balancing weight; Load moment of flexure 2900NM, safety coefficient is 1.5, makes the mulit-turning crankshaft generation resonance behind fixed crankshaft arm clamp body and the balancing weight; Be fixed on sensor on the balancing weight with vibration signal real-time Transmission to signal controlling and disposal system; Until crackle occurring, system-down, the flexible life that draws this mulit-turning crankshaft is 3.6X10
5Inferior, crackle results from the 4th and turns rod journal knuckle place.
Claims (1)
1. a mulit-turning crankshaft fatigue bending machine is characterized in that comprising: worktable, displacement transducer, electromagnetic exciter, portal frame, extension spring, hook bolt, balancing weight, crank arm clamp body, diameter of axle clamp body, signal controlling and disposal system, mulit-turning crankshaft, spring supporting seat, compression spring;
Worktable bottom is fixed through pedestal and ground, and worktable upper surface is processed with T type groove parallel and that be uniformly distributed with, and the T type groove on worktable passes through T type bolt fixedly portal frame, spring supporting seat, two electromagnetic exciters respectively;
On the portal frame fixing two hook bolts downwards an end of each extension spring identical with specification connect; The other end of two extension springs clamps through the two ends of diameter of axle clamp body and mulit-turning crankshaft respectively; Place compression spring between diameter of axle clamp body of fixing on the main shaft of mulit-turning crankshaft stage casing and the spring supporting seat; Make the main shaft of the mulit-turning crankshaft after fixing parallel, and fixing diameter of axle clamp body and spring supporting seat is being processed with spring screens groove with the compression spring contact position on the main shaft of stage casing with the upper surface of worktable;
Each crank arm difference fixed crankshaft arm clamp body at mulit-turning crankshaft; And the crank arm clamp body has the inner chamber that is complementary with tested crank shaft arm appearance curved surface; Fixed weight piece on the crank throw opposite direction of each crank arm clamp body; Balancing weight and crank arm clamp body are formed the resonance swing arm, and through the quality that balancing weight is regulated the resonance swing arm, resonance swing arm quality and crank arm mass ratio are 2: 1～5: 1;
Two electromagnetic exciters are symmetricly set on the two ends of mulit-turning crankshaft, and two balancing weights of the armature of two electromagnetic exciters and mulit-turning crankshaft outermost end fix, two electromagnetic exciters to the mulit-turning crankshaft input with the resonant excitation of homophase frequently;
Displacement transducer is fixed on the balancing weight; Displacement transducer is used to measure the respond vibration signal of bent axle clamp body resonator system; Two electromagnetic exciters, displacement transducers link to each other with disposal system with signal controlling through lead simultaneously, and the vibration frequency of signal controlling and disposal system control bit displacement sensor also receives the vibration signal of displacement transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202444085U CN202229993U (en) | 2011-07-12 | 2011-07-12 | Bending fatigue tester for multi-throw crank shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202444085U CN202229993U (en) | 2011-07-12 | 2011-07-12 | Bending fatigue tester for multi-throw crank shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202229993U true CN202229993U (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202444085U Expired - Fee Related CN202229993U (en) | 2011-07-12 | 2011-07-12 | Bending fatigue tester for multi-throw crank shaft |
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| CN (1) | CN202229993U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101534A (en) * | 2014-07-16 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Engine crankshaft fatigue test fixture |
| CN104764579A (en) * | 2015-04-15 | 2015-07-08 | 浙江大学 | Wind tunnel test device for three-freedom-degree waving of multi-bundle iced conductor |
| CN105264354A (en) * | 2013-03-27 | 2016-01-20 | 日新制钢株式会社 | Fatigue testing device |
-
2011
- 2011-07-12 CN CN2011202444085U patent/CN202229993U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264354A (en) * | 2013-03-27 | 2016-01-20 | 日新制钢株式会社 | Fatigue testing device |
| CN104101534A (en) * | 2014-07-16 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Engine crankshaft fatigue test fixture |
| CN104101534B (en) * | 2014-07-16 | 2018-02-27 | 上汽通用五菱汽车股份有限公司 | A kind of engine crankshaft fatigue test clamper |
| CN104764579A (en) * | 2015-04-15 | 2015-07-08 | 浙江大学 | Wind tunnel test device for three-freedom-degree waving of multi-bundle iced conductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20130712 |