CN103091020A - Detection method and detection device for impact energy of hydraulic breaking hammer - Google Patents

Detection method and detection device for impact energy of hydraulic breaking hammer Download PDF

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Publication number
CN103091020A
CN103091020A CN2011103406210A CN201110340621A CN103091020A CN 103091020 A CN103091020 A CN 103091020A CN 2011103406210 A CN2011103406210 A CN 2011103406210A CN 201110340621 A CN201110340621 A CN 201110340621A CN 103091020 A CN103091020 A CN 103091020A
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impact energy
drill rod
impact
breaking hammer
data
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CN2011103406210A
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杨国平
朱法龙
罗铭
孟宪三
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Giant Hydraulic Tech Co ltd Anhui
Shanghai University of Engineering Science
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Giant Hydraulic Tech Co ltd Anhui
Shanghai University of Engineering Science
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Abstract

The invention relates to a detection method and a detection device for impact energy of a hydraulic breaking hammer. The detection method comprises the following steps: firstly, a pressure sensor detects the impact force of a drill rod of the breaking hammer and converts into voltage signals. Secondly, a data collection card collects the voltage signals. Thirdly, a computer reads data collected by the data collection card and processes the data. And lastly, the computer outputs the processing result through an output module. The detection device comprises the pressure sensor, the data collection card, the computer and the output module, wherein the pressure sensor, the data collection card, the computer and the output module are connected in sequence, and the pressure sensor is fixed on an action level plane of the drill rod of the breaking hammer through a senor fixing part. Compared with the prior art, the detection method and the detection device for impact energy of a hydraulic breaking hammer have the advantages of being simple in method, convenient to operate, accurate in detection result, and the like.

Description

A kind of measurement method for impact energy of hydraulic breaking hammer and device
Technical field
The present invention relates to a kind of breaking hammer performance detection field, especially relate to a kind of measurement method for impact energy of hydraulic breaking hammer and device.
Background technology
Impact energy has reflected the breaking capacity of hydraulic breaking hammer, and frequency of impact has reflected the broken speed of hydraulic breaking hammer, and impact energy and frequency of impact have determined the work quality of quartering hammer jointly as two performance parameters.Often only provide frequency of impact in the sample of many manufacturers or technological document, do not mark impact energy.For frequency of impact, the detection of impact energy is higher in aspect demands such as technology, expenses, and the impact energy that obtains because of the difference of detection method also has certain difference.Because present domestic do not have unified detection method and standard, the accuracy of measured result, repeatability, comparability are all very poor, so the impact energy parameter that each manufacturer provides easily causes confusion, providing of impact energy is also just more difficult.
At present, knocker impact energy parameter test method commonly used comprises end speed method, indicator diagram method, stress wave, mechanical measurement method, nitrogen chamber tonometry.
Patent CN1387030 measures the apparatus and method that nitrogen chamber pressure calculates piston kinetic energy, and measuring method is simple and easy to do, but for the all-hydraulic effect hydraulic hammer that there is no nitrogen chamber, can't use.It is the variation according to the nitrogen chamber volume simultaneously, finds the solution the displacement of piston movement, extrapolates the maximal rate of piston movement, draws at last kinetic energy, but has ignored the weight of piston front and back chamber active area and piston itself.Although the result that draws has thus reflected the kinetic energy that piston has to a certain extent, can not accurately reflect the impact energy that hydraulic impactor has.Though the impact energy that general similar approach detects has to a certain degree reflected the kinetic energy that piston has, but be delivered to drill steel and have later on certain energy loss, make the impact energy and the energy of practical function on object that detect not be inconsistent, and then measurement result depart from actual value more.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of method simple for the defective that overcomes above-mentioned prior art existence, and easy to operate, testing result is measurement method for impact energy of hydraulic breaking hammer and device accurately.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of measurement method for impact energy of hydraulic breaking hammer comprises following step: 1) pressure transducer detects the crushing hammar drill rod impulsive force, and is converted into voltage signal; 2) data collecting card gathers voltage signal; 3) the computing machine read step 2) in the data that gather of data collecting card, and carry out data and process; 4) computing machine is exported step 3 by output module) in result.
Described step 3) concrete steps that in, data are processed are:
A) data with the data collecting card collection convert impulsive force to by linear relationship, and obtain the effective acting time of crushing hammar drill rod;
B) according to steps A) in effective acting time of the impulsive force that records and crushing hammar drill rod obtain impacting force-time curve;
C) horizontal ordinate of impact force-time curve carries out discrete processes, and by integral principle, the cumulative crushing hammar drill rod that obtains of discrete value is impacted linear impulse;
D) pass through the initial velocity of the impulse calculation crushing hammar drill rod of crushing hammar drill rod impulsive force;
E) according to quality and the step D of crushing hammar drill rod) initial velocity that obtains obtains impact energy;
F) draw N the time T that the impulsive force peak value is used according to impacting force-time curve n, one-shot period of motion T=T n/ N, frequency of impact is f=1/T.
The area that described impact force-time curve and coordinate axis are surrounded is the momentum of crushing hammar drill rod, and impact force-time curve horizontal ordinate carries out discrete processes, can be got by theorem of momentum:
Figure BDA0000104549140000021
The impact energy of hydraulic impact hammer is:
Figure BDA0000104549140000022
F is impulsive force, and τ is useful effect power time, wherein F mBe maximum impact force.
Described voltage signal is by processing through amplification, rectification and filtering before the data collecting card collection.
A kind of hydraulic breaking hammer impact energy pick-up unit, this pick-up unit comprises pressure transducer, data collecting card, computing machine and output module, described pressure transducer, data collecting card, computing machine are connected with output module and are connected, it is characterized in that, described pressure transducer is fixed on the exposure level face of crushing hammar drill rod by the sensor fixture.
Be provided with auxiliary circuit between described pressure transducer and data collecting card, this auxiliary circuit comprises successively amplifying circuit, rectification circuit and the filtering circuit that connects, and the voltage signal that pressure transducer is produced amplifies, rectification and filtering.
Described output module comprises printer and display.
Compared with prior art, the present invention accurately detects effective impact energy of quartering hammer, and method of testing is simple, handling safety, convenience.Not only can be used for the laboratory impact energy of quartering hammer is tested, also can be easily for the production of producer, the various performance of operating condition of quartering hammer be carried out factory inspection.Unified performance for different manufacturers, dissimilar knocker more also has higher reference value, in addition easy for installation due to the method, use simply, extremely be conducive to operate the operation and maintenance to checkout equipment with managerial personnel.
Description of drawings
Fig. 1 is the process flow diagram of detection method of the present invention;
Fig. 2 is the structural representation of pick-up unit of the present invention;
Fig. 3 is impulsive force-time plot.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
The flow process of detection method of the present invention as shown in Figure 1, at first detect the crushing hammar drill rod impulsive force by pressure transducer 1, and be converted into voltage signal, then data collecting card 2 gathers voltage signal with some cycles, the data that computing machine 3 reading out data capture cards 2 gather, and carry out data and process, obtain the quartering hammer 6 impact property parameters such as impact energy, frequency of impact, the result of exporting by output module 4 at last.
In computing machine 3, data are processed and to be comprised following step: at first, convert the data of data collecting card collection to impulsive force by linear relationship, and obtain data action time of crushing hammar drill rod; Then, obtain impacting force-time curve according to data action time of the impulsive force that records and crushing hammar drill rod, the horizontal ordinate of impact force-time curve carries out discrete processes, and by integral principle, the cumulative crushing hammar drill rod that obtains of discrete value is impacted linear impulse, by the initial velocity of this impulse calculation crushing hammar drill rod, calculate impact energy according to the quality of crushing hammar drill rod and the initial velocity that obtains afterwards; At last, draw N the time T that the impulsive force peak value is used according to impacting force-time curve n, one-shot period of motion T=T n/ N, frequency of impact is f=1/T.Fig. 3 is the schematic diagram that impacts force-time curve.
The voltage signal of pressure transducer 1 is after amplification, rectification and filtering, and data collecting card gathers this signal, and obtains information action time of crushing hammar drill rod, is read and is converted to the impulsive force value by linear relationship by computing machine.The impulsive force value that records is carried out data analysis, judge whether data carry out computing effectively again.According to integral principle, to horizontal ordinate carry out n time discrete, obtain T 0, T 1..., T n-1, corresponding to n power value.But the area approximate representation that Curves surrounds when n is enough large is: F 0T 0+ F 1T 1+ ... F n-1T n-1When reaching F mShi Jinhang m-1 time is discrete, but the area that when the m value is enough large, Curves surrounds also approximate representation be: F 0T 0+ F 1T 1+ ... F m-1T m-1Wherein, F 0, F 1... .F m-1, F m... .F n-1, F nCan obtain by data acquisition, i.e. indiscrete value quantization in sampling process; T 0, T 1..., T m-1, T m..., T n-1, T nCan obtain according to the sampling time, and the time discretization of the continuous quantity in sampling process.Therefore can get crushing hammar drill rod acting force momentum is: I m=F 0T 0+ F 1T 1+ ... F m-1T m-1+ F mT m(1).
According to the dynamometry principle of pressure transducer, F=KU, K are scale-up factor, and U is the voltage that sensor records, and can obtain:
F 0＝KU 0，F 1＝KU 1，...F m-1＝KU m-1，F m＝KU m(2)。
Again by theorem of momentum:
Ft=mv 2-mv 1(v 2Be end speed, v 1Be initial velocity) (3).
When piston hit crushing hammar drill rod, under the acting in conjunction of the directed force F of crushing hammar drill rod and piston self gravitation G, momentum changed, and can be got by theorem of momentum (3):
∫ 0 τ [ Fdt ] - Gτ = Mv 1 - M ( - v 0 ) = Mv 0 - - - ( 4 ) .
Illustrate: v 0Initial velocity when hitting for piston, v 1Get zero for hitting end speed
I i＝F it＝KU it
I m＝F 0T 0+F 1T 1+......F m-1T m-1+F mT m＝KU 0T 0+KU 1T 1+......KU m-1T m-1+KU mT m(5)
I m = Σ i = 0 m I i = Σ i = 0 m KU i T i
Can be got by (4): v 0 = ∫ 0 τ [ Fdt ] - Gτ M = I m - Gτ M - - - ( 6 )
Can get the hydraulic impactor impact energy by (5) and (6) is:
E = Mv 0 2 2 = ( I m - Gτ ) 2 2 M = ( KU 0 T 0 + K U 1 T 1 + . . . . . . KU m - 1 T m - 1 + KU m T m - Gτ ) 2 2 M
Wherein:
F m---maximum force
Valid data number before the high-tensile strength value point that arrives of m---sampling
U i---the sensor voltage that sampling obtains
V 0---impact initial velocity
T---the sampling interval time
The quality of M---crushing hammar drill rod
K---sensor proportionality constant (can obtain by test calibration)
τ---effective acting time
The ram hammer of the different modes of action such as nitrogen explosion type hydraulic hammer, full hydraulic quartering hammer.
The impact force-time curve carries out analyzing and processing, draws N the time T that peak value is used n, and one-shot period of motion T=T n/ N is f=1/T thereby draw frequency of impact.
As shown in Figure 2, a kind of hydraulic breaking hammer impact energy pick-up unit, this pick-up unit comprises pressure transducer 1, data collecting card 2, computing machine 3 and output module 4.Be provided with auxiliary circuit between pressure transducer and data collecting card, this auxiliary circuit comprises successively amplifying circuit, rectification circuit and the filtering circuit that connects, and the voltage signal that pressure transducer is produced amplifies, rectification and filtering.Pressure transducer 1, auxiliary circuit, data collecting card 2, computing machine 3 are connected with output module successively and are connected, and pressure transducer 1 is fixed on the exposure level face of drill steel 61 by sensor fixture 5.Output module 4 comprises printer and display, is used for the output detections result.

Claims (7)

1. a measurement method for impact energy of hydraulic breaking hammer, is characterized in that, comprises following step:
1) pressure transducer detects the crushing hammar drill rod impulsive force, and is converted into voltage signal;
2) data collecting card gathers voltage signal;
3) the computing machine read step 2) in the data that gather of data collecting card, and carry out data and process;
4) computing machine is exported step 3 by output module) in result.
2. a kind of measurement method for impact energy of hydraulic breaking hammer according to claim 1, is characterized in that, described step 3) in the concrete steps processed of data be:
A) data with the data collecting card collection convert impulsive force to by linear relationship, and obtain the effective acting time of crushing hammar drill rod;
B) according to steps A) in effective acting time of the impulsive force that records and crushing hammar drill rod obtain impacting force-time curve;
C) horizontal ordinate of impact force-time curve carries out discrete processes, and by integral principle, the cumulative crushing hammar drill rod that obtains of discrete value is impacted linear impulse;
D) pass through the initial velocity of the impulse calculation crushing hammar drill rod of crushing hammar drill rod impulsive force;
E) according to quality and the step D of crushing hammar drill rod) initial velocity that obtains obtains impact energy;
F) draw N the time T that the impulsive force peak value is used according to impacting force-time curve n, one-shot period of motion T=T n/ N, frequency of impact is f=1/T.
3. a kind of measurement method for impact energy of hydraulic breaking hammer according to claim 2, it is characterized in that, the area that described impact force-time curve and coordinate axis are surrounded is the momentum of crushing hammar drill rod, and impact force-time curve horizontal ordinate carries out discrete processes, can be got by theorem of momentum: The impact energy of hydraulic impact hammer is:
Figure FDA0000104549130000012
F is impulsive force, and τ is useful effect power time, wherein F mBe maximum impact force.
4. a kind of measurement method for impact energy of hydraulic breaking hammer according to claim 1, is characterized in that, described voltage signal is by processing through amplification, rectification and filtering before the data collecting card collection.
5. device of implementing measurement method for impact energy of hydraulic breaking hammer claimed in claim 1, this device comprises pressure transducer, data collecting card, computing machine and output module, described pressure transducer, data collecting card, computing machine are connected with output module and are connected, it is characterized in that, described pressure transducer is fixed on the exposure level face of crushing hammar drill rod by the sensor fixture.
6. the device of measurement method for impact energy of hydraulic breaking hammer according to claim 5, it is characterized in that, be provided with auxiliary circuit between described pressure transducer and data collecting card, this auxiliary circuit comprises successively amplifying circuit, rectification circuit and the filtering circuit that connects, and the voltage signal that pressure transducer is produced amplifies, rectification and filtering.
7. the device of measurement method for impact energy of hydraulic breaking hammer according to claim 5, is characterized in that, described output module comprises printer and display.
CN2011103406210A 2011-11-01 2011-11-01 Detection method and detection device for impact energy of hydraulic breaking hammer Pending CN103091020A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528739A (en) * 2013-09-29 2014-01-22 北京市三一重机有限公司 Impulse testing system
CN104634689A (en) * 2015-02-03 2015-05-20 北京市路兴公路新技术有限公司 Metering device and metering method for marshall compaction testing apparatus for asphalt mixture
CN105784234A (en) * 2016-04-01 2016-07-20 武汉理工大学 Impact energy and impact frequency measuring device for electrically-driven pneumatic hammers
CN106679865A (en) * 2016-11-28 2017-05-17 山西北方机械制造有限责任公司 Method for measuring impact energy of impact mechanism
CN108256195A (en) * 2018-01-10 2018-07-06 太原科技大学 A kind of longitudinal direction Rolling shear hydraulic system pressure shock calculation method

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528739A (en) * 2013-09-29 2014-01-22 北京市三一重机有限公司 Impulse testing system
CN103528739B (en) * 2013-09-29 2015-07-08 北京市三一重机有限公司 Impulse testing system
CN104634689A (en) * 2015-02-03 2015-05-20 北京市路兴公路新技术有限公司 Metering device and metering method for marshall compaction testing apparatus for asphalt mixture
CN105784234A (en) * 2016-04-01 2016-07-20 武汉理工大学 Impact energy and impact frequency measuring device for electrically-driven pneumatic hammers
CN105784234B (en) * 2016-04-01 2018-08-07 武汉理工大学 A kind of ballistic work and frequency of impact measuring device of electricity purging hammer
CN106679865A (en) * 2016-11-28 2017-05-17 山西北方机械制造有限责任公司 Method for measuring impact energy of impact mechanism
CN108256195A (en) * 2018-01-10 2018-07-06 太原科技大学 A kind of longitudinal direction Rolling shear hydraulic system pressure shock calculation method
CN108256195B (en) * 2018-01-10 2021-03-30 太原科技大学 Pressure impact calculation method for hydraulic system of longitudinal rolling shear

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Application publication date: 20130508