CN102419262A - Dynamic fatigue testing machine for rubber bumper block of road roller - Google Patents
Dynamic fatigue testing machine for rubber bumper block of road roller Download PDFInfo
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- CN102419262A CN102419262A CN201110239840XA CN201110239840A CN102419262A CN 102419262 A CN102419262 A CN 102419262A CN 201110239840X A CN201110239840X A CN 201110239840XA CN 201110239840 A CN201110239840 A CN 201110239840A CN 102419262 A CN102419262 A CN 102419262A
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Abstract
The invention provides a computer-controlled hydraulic servo dynamic fatigue testing machine for vibrating a rubber bumper block of a road roller. The testing machine provided by the invention comprises a framework, a testing machine acting head and a test fixture, wherein the test fixture is arranged below the testing machine acting head and the test fixture is used for clamping the rubber bumper block of the road roller; a hydraulic servo system is controlled by a computer and a hydraulic oil cylinder is controlled by the hydraulic servo system to apply vibration to the rubber bumper block of the road roller through the testing machine acting head; and the vibration is generated by overlapping high-frequency small-amplitude vibration and low-frequency large-amplitude vibration and a simulated rubber bumper block fatigue test accords with the actual work state.
Description
Technical field
The present invention relates to a kind of suspension flexible member that is applicable to automobile, highway machinery and relevant device; And rail truck; Comprise the torture test of EMUs, rolling stock and lorry suspension flexible member; The fatigue tester of tired long duration test that also is fit to various power, the position closed loop control of other needs vertical loading relates in particular to a kind of computer control hydraulic servo dynamic fatigue test machine that is used for flexible member such as vibroll vibration damper.
Background technology
Damping rubber block is the requisite parts of vibroll, and in the disclosed compactor structures such as patent CN2223305Y, CN201321594Y, damping rubber block has outstanding effect for the comfortableness of pilothouse.Usually need in the pressure roller of vibrating roller 24 damping rubber blocks are installed, the applicant makes improvement to its structure and technology in patent 201020293916.8 and 201110041212.0, make the street roller snubber block possess good damping performance.Snubber block receives the vibration torsional deformation when street roller is worked, because its damping capacity produces damping effect, but torsional deformation inevitably produces frictional heat in the molecule, causes the aging of damping rubber block, influences the serviceable life of snubber block.Therefore, the damping rubber block fatigue tester is that research improves the snubber block important tool in serviceable life.
According to the principle of work of vibroll, damping rubber block receives the vibration of two kinds of forms simultaneously during street roller work: the one, and the low frequency large-amplitude vibration that rough road surface produces; The 2nd, by the high frequency small amplitude motion of exciting device generation.Also nobody designs the fatigue experimental device of producing the street roller snubber block at present; And only there is unifrequent vibration load mode in existing fatigue experimental device; A kind of servo hydraulic-control high-frequency dynamic fatigue tester of modularity computer is disclosed like patent 200810234343.9; No matter be high-frequency or low frequency; Or high and low frequency intersects load mode and all can not truly reflect the actual condition load character of damping rubber block, and the True Data existence the when fatigue data that obtains like this and real work has also just lost the meaning of torture test than mistake.
Therefore the emphasis that seek a kind ofly can to conform to, the accurate damping rubber block fatigue tester of experimental data becomes present research with actual working state.
Summary of the invention
The objective of the invention is to solve the defective that existing fatigue tester exists when the work of research street roller snubber block; Design a kind of computer control hydraulic servo dynamic fatigue test machine that is used for the vibroll damping block; Adopt high frequency small amplitude motion and the superimposed form of low frequency large-amplitude vibration, the torture test of simulation damping rubber block conforms to actual working state.
Technical scheme is following: a kind of computer control hydraulic servo dynamic fatigue test machine that is used for the vibroll damping block; Comprise framework, testing machine start head and test fixture; Wherein hydraulic jack is installed on the upper beam of framework; And link to each other with testing machine start head, testing machine start head below is provided with test fixture, test fixture clamping street roller damping rubber block; Piece firmly is connected with the testing machine platform under the test fixture side plate; The computer control Hydrauservo System, Hydrauservo System control hydraulic jack applies vibration through testing machine start head to the street roller damping rubber block, and described vibration is the vibration of high frequency small amplitude motion and the superimposed generation of low frequency large-amplitude vibration.
Situation more specifically; Described test fixture comprises outer panel, pressing plate and locating sleeve; Two street roller damping rubber blocks are separately fixed on the outer panel of the left and right sides; Two locating sleeves are connected the location with the upper and lower of snubber block respectively up and down, the pressing plate of between the street roller damping rubber block, packing into, and tighting a bolt by the compression spacing of actual needs makes locating sleeve and left and right sides outer panel not have the gap.Testing machine adopts two street roller damping rubber blocks to make the start head when applying vibrations, keep balance, thereby realizes as much as possible conforming to actual working state.
Further, said testing machine start head is connected with said pressing plate in the test fixture.
Framework of the present invention adopts gantry frame formula structure, and afterburner system designs the stack that realizes double wave shape with the double hydraulic cylinder superposing type, and the servo apply hydraulic pressure system comes realizable force, displacement closed-loop control in this additive process, the separate mutually noninterfere of each closed-loop system.Low frequency large amplitude oil cylinder can be under computer control be realized the waveform of standard-required according to the big displacement of small frequency; The oil cylinder of the little amplitude of high frequency is realized the waveform of standard-required according to the little displacement of high-frequency under computer control; Can load high frequency waveforms separately; Also can load the low frequency waveform separately, stack test when can arbitrarily the time, carry out all size waveform simultaneously really realizes all-hydraulic two servo automatic control system.When needs carry out preload and the torture test of low frequency large amplitude; Can be through the mode of changing clamp; Automatically accomplish test by computer control system; During test after power or displacement reach the value of setting computing machine automatically feedback one signal give servo-valve, the switching size and the break-make of control servo-valve, and show various numerical value and curves such as real-time power, displacement, frequency, test duration automatically.
Computer control system can be taked the full-digital control system, comprises the demarcation and the limit setting of control waveform, sensor, and numeral shows, data acquisition and drawing in real time.
Reference standard: the JG/T60-1999 vibroll is used the rubber shock absorber technical conditions.
Beneficial effect of the present invention is:
1. this machine adopts the method for motor, the common cooperation of servo-valve multigroup combination to overcome the problem of pump, valve flow quantity not sufficient, to reach moment big flow and the requirement of frequency, adopts variable vane pump can practice thrift a large amount of energy.
2. adopt the heavy-duty motor of 15KW, the homemade pump of drawing method makes the flow of system reach 20L/MIN, satisfies the big stroke of system, the demand of high flow capacity.
3. adopt the high-performance servo-valve, the flow 20L/MIN of valve, frequency response is 100Hz, guarantees the requirement of flow system flow, power value, frequency, makes system can reach designing requirement.
Description of drawings
Fig. 1 is the cross-sectional view of street roller snubber block;
Fig. 2 is the anchor clamps assembling synoptic diagram of fatigue tester of the present invention;
Fig. 3 is a fatigue tester synoptic diagram of the present invention;
Fig. 4 is computer control hydraulic servo dynamic fatigue test machine wave form figure.
Embodiment
In order further to set forth the beneficial effect that the present invention obtained, below in conjunction with accompanying drawing 2-4 and preferred embodiment, further explain, but should be noted in the discussion above that the present invention's scope required for protection is not limited in this.
The computer control hydraulic servo dynamic fatigue test machine (as shown in Figure 2) that is used for the vibroll damping block; Comprise framework, testing machine start 5 and test fixture 7; Said framework adopts gantry frame formula structure, and wherein testing machine start 5 below are provided with test fixture 7,2 street roller damping rubber blocks 6 of test fixture 7 clampings; Piece firmly is connected with the testing machine platform under the test fixture side plate; The computer control Hydrauservo System applies vibration through testing machine start head to the street roller damping rubber block, and described vibration is the vibration of high frequency small amplitude motion and the superimposed generation of low frequency large-amplitude vibration.
Fig. 3 is the assembling of clear test fixture specifically.Described test fixture comprises outer panel 1, pressing plate 2 and locating sleeve 4, two street roller damping rubber blocks 6 is separately fixed on the outer panel of the left and right sides, and the pressing plate of between the street roller damping rubber block, packing into, tighting a bolt 4 makes locating sleeve and left and right sides outer panel not have the gap.
Afterburner system of the present invention adopts the double hydraulic cylinder superposing type to design the stack that realizes double wave shape, and the servo apply hydraulic pressure system comes realizable force, displacement closed-loop control in this additive process, the separate mutually noninterfere of each closed-loop system.Low frequency large amplitude oil cylinder can be under computer control be realized the waveform of standard-required according to the big displacement of small frequency; The oil cylinder of the little amplitude of high frequency is realized the waveform of standard-required according to the little displacement of high-frequency under computer control; Stack test when can arbitrarily the time, carry out all size waveform; As shown in Figure 4; The high_frequency sine wave y=3sin50t stack of the low-frequency sine y=12sin2.5t of low-frequency vibration and dither, the sinusoidal stack of the height ripple of formation low-and high-frequency resultant vibration is really realized all-hydraulic two servo automatic control system.When needs carry out preload and the torture test of low frequency large amplitude; Can accomplish test automatically by computer control system through the mode of changing clamp, during test after power or displacement reach the value of setting computing machine automatically feedback one signal give servo-valve; The switching size and the break-make of control servo-valve; And show various numerical value and curves such as real-time power, displacement, frequency, test duration automatically, generate test report automatically, but selective printing, preserve all test records.
Claims (4)
1. the computer control hydraulic servo dynamic fatigue test machine that is used for the vibroll damping block,
Comprise framework, testing machine start head and test fixture,
Wherein hydraulic jack is installed on the upper beam of framework; And link to each other with testing machine start head, testing machine start head below is provided with test fixture, test fixture clamping street roller damping rubber block; Piece firmly is connected with the testing machine platform under the test fixture side plate; The computer control Hydrauservo System, Hydrauservo System control hydraulic jack applies vibration through testing machine start head to the street roller damping rubber block
It is characterized in that: described vibration is the vibration of high frequency small amplitude motion and the superimposed generation of low frequency large-amplitude vibration.
2. fatigue tester according to claim 1 is characterized in that: described test fixture comprises outer panel, pressing plate and locating sleeve,
Two street roller damping rubber blocks are separately fixed on the outer panel of the left and right sides; Two locating sleeves are connected the location with the upper and lower of snubber block respectively up and down; The pressing plate of between the street roller damping rubber block, packing into, tighting a bolt by the compression spacing of actual needs makes locating sleeve and left and right sides outer panel not have the gap.
3. testing machine start head according to claim 1 and 2, it is connected with said pressing plate in the test fixture.
4. the fatigue tester of street roller snubber block according to claim 1 is characterized in that: afterburner system adopts the design of double hydraulic cylinder superposing type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110239840.XA CN102419262B (en) | 2011-08-21 | 2011-08-21 | Dynamic fatigue testing machine for rubber bumper block of road roller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110239840.XA CN102419262B (en) | 2011-08-21 | 2011-08-21 | Dynamic fatigue testing machine for rubber bumper block of road roller |
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| CN102419262A true CN102419262A (en) | 2012-04-18 |
| CN102419262B CN102419262B (en) | 2015-06-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535284A (en) * | 2014-12-16 | 2015-04-22 | 广西科技大学 | Parallel dynamic stiffness experiment table |
| CN104913919A (en) * | 2015-06-16 | 2015-09-16 | 西华大学 | Rubber isolator dynamic and static performance testing device |
| CN105247432A (en) * | 2013-06-03 | 2016-01-13 | 三菱电机株式会社 | Frequency response measurement device |
| CN106197914A (en) * | 2016-06-22 | 2016-12-07 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of rotor blade damping block reliability test method |
| CN110987678A (en) * | 2019-12-17 | 2020-04-10 | 西南交通大学 | Fastener system fatigue test method |
| CN116358905A (en) * | 2023-05-19 | 2023-06-30 | 华南理工大学 | Shock absorber durability test equipment |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105247432A (en) * | 2013-06-03 | 2016-01-13 | 三菱电机株式会社 | Frequency response measurement device |
| CN104535284A (en) * | 2014-12-16 | 2015-04-22 | 广西科技大学 | Parallel dynamic stiffness experiment table |
| CN104535284B (en) * | 2014-12-16 | 2018-05-29 | 广西科技大学 | A kind of linkage rigidity test bench |
| CN104913919A (en) * | 2015-06-16 | 2015-09-16 | 西华大学 | Rubber isolator dynamic and static performance testing device |
| CN104913919B (en) * | 2015-06-16 | 2018-09-07 | 西华大学 | Rubber shock absorber dynamic and static state performance test device |
| CN106197914A (en) * | 2016-06-22 | 2016-12-07 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of rotor blade damping block reliability test method |
| CN106197914B (en) * | 2016-06-22 | 2019-03-08 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of rotor blade damping block reliability test method |
| CN110987678A (en) * | 2019-12-17 | 2020-04-10 | 西南交通大学 | Fastener system fatigue test method |
| CN116358905A (en) * | 2023-05-19 | 2023-06-30 | 华南理工大学 | Shock absorber durability test equipment |
| CN116358905B (en) * | 2023-05-19 | 2023-08-01 | 华南理工大学 | Shock absorber durability test equipment |
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| CN102419262B (en) | 2015-06-03 |
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Granted publication date: 20150603 Termination date: 20180821 |