CN106401937A - Oil pump noise test device and test method - Google Patents
Oil pump noise test device and test method Download PDFInfo
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- CN106401937A CN106401937A CN201610875649.7A CN201610875649A CN106401937A CN 106401937 A CN106401937 A CN 106401937A CN 201610875649 A CN201610875649 A CN 201610875649A CN 106401937 A CN106401937 A CN 106401937A
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- oil pump
- measured
- sensor unit
- vibrating sensor
- signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
The invention discloses an oil pump noise test device. The device comprises a base supporting frame, a base supporting air cylinder and a vibration sensor unit; the upper end of an oil pump to be tested is hung and fixed, the base supporting frame vertically moves along with the telescopic motion of an ejector rod of the base supporting air cylinder, and when the base supporting frame moves to the upper end, the oil pump to be tested is supported; when the base supporting frame moves to the lower end, the oil pump to be tested is separated from the base supporting frame and is in the midair-suspending state; and the vibration sensor unit can be mounted on and fixed to a shell of the oil pump to be tested in a combined manner, and the vibration sensor unit is used for detecting output vibration signals. The invention further discloses an oil pump noise test method. According to the oil pump noise test device and test method, the actual level of the noise of the oil pump to be tested can be accurately reflected.
Description
Technical field
The present invention relates to vehicle performance test technology, particularly to a kind of oil pump noise test equipment and method of testing.
Background technology
In recent years, car load factory requires to step up to performance in car load for the oil pump, making an uproar during operation of oil pump
Sound shows a key index as vehicle performance, is increasingly paid attention to by car load factory.And the index test related to noise
A difficult problem always in auto manufacturing.Traditional method of testing is after oil pump is installed to car load, idle in locomotive by human ear
Reflect under fast state and come otherwise the size of oil pump noise is judged.This mode not only cannot accurately reflect that oil pump is made an uproar
The practical level of sound, even and if find that oil pump has noise problem, product entrucking, then carry out changing also complex.
Content of the invention
The technical problem to be solved in the present invention is to reflect the practical level of oil pump noise to be measured.
For solving above-mentioned technical problem, the oil pump noise test equipment that the present invention provides, it includes base bracing frame, base
Support cylinder, vibrating sensor unit；
Oil pump upper end to be measured hangs to be fixed；
Described base bracing frame supports the flexible of ejecting rod of cylinder to move up and down with base；
When described base bracing frame moves to upper end, support described oil pump to be measured；
When described base bracing frame moves to lower end, oil pump to be measured separates with described base bracing frame and is in hanging shape
State；
Described vibrating sensor unit, can combine installation and be fixed on oil pump case to be measured；
Described vibrating sensor unit, for detection output vibration signal.
Preferably, described vibrating sensor unit includes acceleration transducer, Magnet, bracket；
Described acceleration transducer and Magnet are respectively mounted and are fixed on described bracket；
Oil pump case to be measured is magnetic conductive material；
Described vibrating sensor unit combines installation by the absorption affinity of Magnet and is fixed on oil pump case to be measured.
Preferably, oil pump case to be measured is cylinder, described vibrating sensor unit front end joining with oil pump case to be measured
Conjunction face is arc surface.
Preferably, described Magnet is fixed on described bracket front end；
Described Magnet and described bracket front end collectively form described vibrating sensor unit front end with oil pump case to be measured
Mating surface.
Preferably, described acceleration transducer is three-dimensional acceleration transducer.
Preferably, oil pump noise test equipment also includes oil supply tank, guide pad, flange；
Described flange is used for being fixed on fuel tank；
Described oil groove is fixed on described flange；
Described guide pad is fixed on described oil groove outer wall；
Described base supports cylinder to be fixed on described flange, and described base supports the push rod of cylinder along described guide pad
Guide rail stretching motion.
Preferably, described guide pad is drum guide pad.
Preferably, oil pump noise test equipment also includes jaw, support gripper cylinder, push cylinder；
Described support gripper cylinder is fixed on the push rod of described push cylinder；
Described jaw clamps air cylinder driven by described support；
When preparing to carry out noise test to oil pump to be measured, described jaw closure clamps described vibrating sensor unit；When
Described base bracing frame moves down makes oil pump to be measured be in vacant state, and the push rod of described push cylinder stretches out, and drives support
Gripper cylinder, jaw push vibrating sensor unit to oil pump to be measured, and then support clamping air cylinder driven jaw is opened release and shaken
Dynamic sensor unit, so that the combination installation of vibrating sensor unit is fixed on oil pump case to be measured；Then described push gas
The push rod of cylinder is retracted, and drives support gripper cylinder, jaw away from oil pump to be measured；
Carry out noise test to oil pump to be measured to finish, the push rod of described push cylinder stretches out, drive support gripper cylinder, folder
Pawl shifts to the vibrating sensor unit that combination is fixed on oil pump case to be measured, then support clamping air cylinder driven jaw closure folder
Hold described vibrating sensor unit, then the push rod of described push cylinder is retracted, drive support gripper cylinder, jaw and vibration to pass
Sensor cell is moved upwards up to upper end and supports oil pump to be measured away from oil pump to be measured, then described base bracing frame.
Preferably, described vibrating sensor unit, can both installations be fixed on oil pump case to be measured.
Preferably, described vibrating sensor unit, can be installed by clip both and be fixed on oil pump case to be measured.
Preferably, the vibration signal of vibrating sensor unit is amplified successively through signal amplifier and wave filter and filters
After be sent to signal acquisition module, signal acquisition module by process after data vibration signal pass to host computer；
The data vibration signal that host computer is transmitted to signal acquisition module by software carries out order decomposition, according to number
Obtain noise order level during operation of oil pump to be measured according to the power of each order of vibration signal.
Preferably, the vibration signal of vibrating sensor unit is sent to signal amplifier by shielded cable；
After signal amplifier will amplify, vibration signal is sent to wave filter by coaxial cable；
After wave filter is filtered to the vibration signal that signal amplifier sends processing, extract characteristic signal, extract
Characteristic signal signal acquisition module is passed to by coaxial cable；
Data vibration signal after processing is passed to host computer by PXI industrial bus by signal acquisition module.
Preferably, power supply is powered for oil pump to be measured by testing cable.
Preferably, described vibrating sensor unit includes a three-dimensional acceleration transducer；Three-dimensional acceleration transducer is defeated
The signal going out is as vibration signal；
Wave filter the vibration signal that signal amplifier sends is filtered process after, extract tangential 20hz～
2khz, radial direction 20hz～2khz and axial 100hz～12khz passes through coaxial cable as characteristic signal, the characteristic signal of extraction
Pass to signal acquisition module.
Preferably, the detection output signal of three-dimensional acceleration transducer is carried out 10～100 times of signal by signal amplifier
Amplify；
Wave filter passes through two 20～2Khz to vibration signal, and 100～12khz filtering channel is filtered locating
Reason.
Preferably, signal amplifier and wave filter are arranged in a device or are divided into two devices；
Before or after wave filter is placed in amplifier.
For solving above-mentioned technical problem, the oil pump noise method of testing that the present invention provides, it makes oil pump to be measured be in vacantly
State, vibrating sensor unit is attached on oil pump case to be measured, described vibrating sensor unit inspection during beginning oil pump to be measured
Survey the vibration signal of level of vibration when output vibration signal characterizes operation of oil pump to be measured.
Preferably, it comprises the following steps：
One. oil pump upper end to be measured is hung and fixes, lower end is supported by base bracing frame；
Two. drive base bracing frame to move down by the push rod that base supports cylinder, so that oil pump to be measured is supported with base
Frame separates and is in vacant state；
Three. vibrating sensor unit is attached on oil pump case to be measured；
Four. oil pump to be measured is started working, and described vibrating sensor unit detection output vibration signal characterizes oil pump work to be measured
The vibration signal of level of vibration when making.
Preferably, it is further comprising the steps of：
Five. it is completed, make vibrating sensor unit depart from oil pump to be measured；
Six. base bracing frame is moved upwards up to upper end and supports oil pump to be measured.
Preferably, described vibrating sensor unit, both is installed and is fixed on oil pump case to be measured.
Preferably, described vibrating sensor unit, installed by clip both and be fixed on oil pump case to be measured.
Preferably, described vibrating sensor unit is attached on oil pump case to be measured by the absorption affinity of Magnet.
Preferably, in step 3, support clamps air cylinder driven jaw clamping vibration sensor unit；Then push cylinder to
Front motion drives support gripper cylinder, jaw and vibrating sensor unit to move at oil pump case to be measured；Then support clamping
Air cylinder driven jaw opens release vibrating sensor unit, so that vibrating sensor unit is attached to by the absorption affinity of Magnet
On oil pump case to be measured；
In step 5, it is completed, push cylinder travels forward and drives support gripper cylinder, jaw to move to vibrating sensing
At device unit；Then support clamping air cylinder driven jaw closure clamping pickup vibrating sensor unit；Then push cylinder is backward
Motion, makes vibrating sensor unit depart from oil pump to be measured.
Preferably, the vibration signal of vibrating sensor unit passes after being amplified and filter through signal amplifier and wave filter
Deliver to signal acquisition module, the data vibration signal after processing is passed to host computer by signal acquisition module；
The data vibration signal that host computer is transmitted to signal acquisition module by software carries out order decomposition, according to number
Obtain noise order level during operation of oil pump to be measured according to the power of each order of vibration signal.
Preferably, described vibrating sensor unit includes a three-dimensional acceleration transducer；Three-dimensional acceleration transducer is defeated
The signal going out is as vibration signal；
Wave filter the vibration signal that signal amplifier sends is filtered process after, extract tangential 20hz～
As characteristic signal, the characteristic signal of extraction passes to signals collecting to 2khz, radial direction 20hz～2khz and axial 100hz～12khz
Module.
Preferably, the detection output signal of three-dimensional acceleration transducer is carried out 10～100 times of signal by signal amplifier
Amplify.
The oil pump noise test equipment of the present invention and method of testing, when preparing to carry out noise test to oil pump to be measured, bottom
The push rod of seat supports cylinder drives base bracing frame to move down, and so that oil pump to be measured is separated with base bracing frame and be in hanging shape
State, during the sign operation of oil pump to be measured of vibrating sensor unit output during test, the vibration signal of level of vibration, reflects indirectly
Noise level during operation of oil pump.The oil pump noise test equipment of the present invention, when noise test is carried out to oil pump to be measured, to be measured
Oil pump is in vacant state, and the combination installation of vibrating sensor unit is fixed to and connects on oil pump case to be measured and not with other devices
Touch, so can guarantee that the vibration signal of the detected output of vibrating sensor unit all from oil pump operation to be measured itself, from
And the practical level of oil pump noise to be measured can accurately be reflected.
Brief description
In order to be illustrated more clearly that technical scheme, below the accompanying drawing using required for the present invention is made simple
Introduce it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the automatic testing equipment structural representation of oil pump noise test equipment one embodiment of the present invention；
Fig. 2 is the partial enlarged drawing of the automatic testing equipment structure of oil pump noise test equipment one embodiment of the present invention；
Fig. 3 is the test circuit schematic diagram of oil pump noise test equipment one embodiment of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the technical scheme in the present invention is carried out with clear, complete description it is clear that described
Embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is general
All other embodiment that logical technical staff is obtained on the premise of not making creative work, broadly falls into present invention protection
Scope.
Embodiment one
As shown in figure 1, oil pump noise test equipment includes base bracing frame 2, base supports cylinder 5, vibrating sensor list
Unit 6；
Oil pump 1 upper end to be measured hangs to be fixed；
Described base bracing frame 2 supports the flexible of cylinder 5 push rod to move up and down with base；
When described base bracing frame 2 moves to upper end, support oil pump 1 to be measured；
When described base bracing frame 2 moves to lower end, oil pump 1 to be measured separates with described base bracing frame 2 and is in hanging
State；
Described vibrating sensor unit 6, can combine installation and be fixed on oil pump 1 housing to be measured；
Described vibrating sensor unit 6, for detection output vibration signal.
The oil pump noise test equipment of embodiment one, when preparing to carry out noise test to oil pump 1 to be measured, base supports gas
The push rod of cylinder 5 drives base bracing frame 2 to move down, and so that oil pump 1 to be measured is separated with base bracing frame 2 and be in vacant state,
During the sign operation of oil pump to be measured of vibrating sensor unit 6 output during test, the vibration signal of level of vibration, reflects oil indirectly
Noise level during pump work.The oil pump noise test equipment of embodiment one, when carrying out noise test to oil pump 1 to be measured, treats
Survey oil pump 1 and be in vacant state, vibrating sensor unit 6 combination installation is fixed on oil pump 1 housing to be measured and is not filled with other
Put and contact, so can guarantee that vibrating sensor unit 6 detected output vibration signal run all from oil pump to be measured
Itself, thus the practical level of oil pump noise to be measured can accurately be reflected.
Embodiment two
Based on the oil pump noise test equipment of embodiment one, as shown in Fig. 2 described vibrating sensor unit 6 includes accelerating
Degree sensor 61, Magnet 62, bracket 63；
Described acceleration transducer 61 and Magnet 62 are respectively mounted and are fixed on described bracket 63；
Oil pump case to be measured is magnetic conductive material；
Described vibrating sensor unit 6 combines installation by the absorption affinity of Magnet 62 and is fixed on oil pump 1 housing to be measured.
Preferably, oil pump 1 housing to be measured is cylinder, described vibrating sensor unit 6 front end is with oil pump 1 housing to be measured
Mating surface is arc surface.
Preferably, described Magnet 62 is fixed on described bracket 63 front end；Described Magnet 62 is common with described bracket 63 front end
Constitute the mating surface with oil pump case to be measured for described vibrating sensor unit 6 front end.
Preferably, described acceleration transducer 61 is three-dimensional acceleration transducer.Three-dimensional acceleration test can characterize oil pump
Level of vibration during work, reflects noise level during operation of oil pump indirectly.
Embodiment three
Based on embodiment one, oil pump noise test equipment also includes oil supply tank 3, guide pad 4, flange 7；
Described flange 7 is used for being fixed on fuel tank；
Described oil groove 3 is fixed on described flange 7；
Described guide pad 4 is fixed on described oil groove 3 outer wall；
Described base supports cylinder 5 to be fixed on described flange 7, and described base supports the push rod of cylinder 5 along described guiding
Block 4 guide rail stretching motion.
Preferably, described guide pad 4 is drum guide pad.
The oil pump noise test equipment of embodiment three, base supports the push rod of cylinder 5 to move up and down along the guide rail of guide pad 4
Make, drive oil pump support base 2 gentle support oil pump 1 to be measured, or it is outstanding to guarantee that oil pump to be measured is in steadily to leave oil pump 1 to be measured
Empty state.
Example IV
Based on embodiment one, two or three, oil pump noise test equipment also includes jaw 9, support gripper cylinder 10, pushes gas
Cylinder 11；
Described support gripper cylinder 10 is fixed on the push rod of described push cylinder 11；
Described jaw 9 is driven by described support gripper cylinder 10；
When preparing to carry out noise test to oil pump 1 to be measured, described jaw 9 closure clamps described vibrating sensor unit 6；
Make oil pump to be measured be in vacant state when described base bracing frame 2 moves down, the push rod of described push cylinder 11 stretches out, drive
Support gripper cylinder 10, jaw 9 push vibrating sensor unit 6 to oil pump 1 to be measured, and then support gripper cylinder 10 drives jaw
9 open release vibrating sensor unit 6, so that vibrating sensor unit 6 combination installation is fixed on oil pump 1 housing to be measured；
Then the push rod of described push cylinder 11 is retracted, and drives support gripper cylinder 10, jaw 9 away from oil pump 1 to be measured；
Carry out noise test to oil pump 1 to be measured to finish, the push rod of described push cylinder 11 stretches out, drive support gripper cylinder
10th, jaw 9 shifts to the vibrating sensor unit 6 that combination is fixed on oil pump 1 housing to be measured, and then support gripper cylinder 10 drives
Jaw 9 closure clamps described vibrating sensor unit 6, and then the push rod of described push cylinder 11 is retracted, and drives support clamping gas
Cylinder 10, jaw 9 and vibrating sensor unit 6 are moved upwards up to upper end and prop up away from oil pump 1 to be measured, then described base bracing frame 2
Prop up oil pump to be measured.
The oil pump noise test equipment of example IV, operation principle is as follows：Push cylinder 11 travels forward, by vibrating sensing
Device unit 6 pushes oil pump 1 to be measured to, and then support gripper cylinder 10 drives jaw 9 to open release vibrating sensor unit 6, thus
Make vibrating sensor unit 6 combine installation and be fixed to oil pump 1 surface of shell, then push cylinder 11 rearward movement, drive support
Gripper cylinder 10, jaw 9 away from oil pump 1 to be measured it is ensured that vibrating sensor unit 6 contact with oil pump 1 to be measured after start oil pump make an uproar
Sound is tested.After the completion of oil pump noise test, push cylinder 11 travels forward, and support gripper cylinder 10 drives jaw 9 closure clamping,
After vibrating sensor unit 6 is picked up, push cylinder 11 rearward movement, vibrating sensor unit 6 is to be measured be completed
Oil pump 1 is separated, and now base supports cylinder 5 to move upwards, drives oil pump support base 2 again to hold up and has completed after tested
Oil pump, so that new oil pump to be measured loads.
The oil pump noise test equipment of example IV, vibrating sensor unit 6 can be automatically mounted into oil pump 1 housing table to be measured
Face, will be bonding with oil pump case to be measured for vibrating sensor unit 6, and does not contact with other devices, normal in oil pump to be measured
It is ensured that oil pump to be measured 1 is in vacant state during test job, can guarantee that the vibration letter that vibrating sensor unit 6 is tested
Number all from oil pump 1 operation itself to be measured.
Embodiment five
Based on the oil pump noise test equipment of embodiment one, described vibrating sensor unit 6 can install fixation by both
To on oil pump 1 housing to be measured.
Preferably, described vibrating sensor unit 6 can be installed by clip both is fixed to oil pump 1 housing to be measured
On.
Embodiment six
Based on embodiment one, as shown in figure 3, the vibration signal of vibrating sensor unit 6 is through signal amplifier 17 and filtering
Device 19 is amplified and is sent to after filtering signal acquisition module 20 successively, and the data after signal acquisition module 20 will be processed is vibrated
Signal passes to host computer 22；
Host computer 22 carries out order decomposition, root by software to the data vibration signal that signal acquisition module 20 transmits
Obtain noise order level during oil pump 1 work to be measured according to the power of each order of data vibration signal.
Preferably, the vibration signal of vibrating sensor unit 6 is sent to signal amplifier 17 by shielded cable 16；
After signal amplifier 17 will amplify, vibration signal is sent to wave filter 19 by coaxial cable 18；
After wave filter 19 is filtered to the vibration signal that signal amplifier sends processing, extracts characteristic signal, carry
The characteristic signal taking passes to signal acquisition module 20 by coaxial cable 18；
Data vibration signal after processing is passed to host computer by PXI industrial bus 21 by signal acquisition module 20
22.
Preferably, described power supply 12 is powered for oil pump to be measured by testing cable 13.
Preferably, described vibrating sensor unit includes a three-dimensional acceleration transducer 61；Three-dimensional acceleration transducer
The signal of 61 detection outputs is as vibration signal；
Wave filter the vibration signal that signal amplifier sends is filtered process after, extract tangential 20hz～
2khz, radial direction 20hz～2khz and axial 100hz～12khz passes through coaxial cable as characteristic signal, the characteristic signal of extraction
Pass to signal acquisition module；
The signal that the detection output signal of three-dimensional acceleration transducer 61 carries out 10～100 times is put by signal amplifier 17
Greatly, the originally faint signal of telecommunication is enlarged into the fiduciary level signal that can be used for signals collecting；
Vibration signal after the amplification that described wave filter 19 sends to signal amplifier 17 passes through two 20hz～2khz,
And 100hz～12khz filtering channel is filtered processing.
Preferably, signal amplifier 17 and wave filter 19 can be arranged in a device it is also possible to be divided into two independences
Device；
Before or after wave filter 19 can be placed in amplifier.
The oil pump noise test equipment of embodiment six, by a series of amplifier and wave filter by faint vibration signal
It is converted into the fiduciary level signal that can be used for signals collecting and process, carried out by way of Fourier transform after this signals collecting
Computed in software, carries out order and decomposes the vibration order decomposition of all directions acceleration to all directions acceleration vibration signal collecting,
The power vibrating each order can directly correspond to noise order level during operation of oil pump.It is achieved thereby that the screening to oil pump noise
With test.
The oil pump noise test equipment of embodiment six, in the oil pump production phase, carries out traditional performance (as flowed to oil pump product
Amount, electric current, pressure etc.) test while carry out three-dimensional acceleration test, when this three-dimensional acceleration test can characterize operation of oil pump
Level of vibration, indirectly reflect noise level during operation of oil pump, to locomotive fuel oil pump production process quality control, reduce whole
Car quality risk is significant.
Embodiment seven
Oil pump noise method of testing, it makes oil pump to be measured be in vacant state, vibrating sensor unit is attached to be measured
On oil pump case, when during beginning oil pump to be measured, described vibrating sensor unit detection output vibration signal characterizes operation of oil pump to be measured
The vibration signal of level of vibration.
The oil pump noise method of testing of embodiment seven, when carrying out noise test to oil pump to be measured, oil pump to be measured is in outstanding
Dummy status, vibrating sensor unit is attached to and contacts on oil pump case to be measured and not with other devices, so can guarantee that vibration
The vibration signal of the detected output of sensor unit all from oil pump operation to be measured itself, thus can accurately reflect to be measured
The practical level of oil pump noise.
Embodiment eight
Based on embodiment seven, oil pump noise method of testing comprises the following steps：
One. oil pump upper end to be measured is hung and fixes, lower end is supported by base bracing frame；
Two. drive base bracing frame to move down by the push rod that base supports cylinder, so that oil pump to be measured is supported with base
Frame separates and is in vacant state；
Three. vibrating sensor unit is attached on oil pump case to be measured；
Four. oil pump to be measured is started working, and described vibrating sensor unit detection output vibration signal characterizes oil pump work to be measured
The vibration signal of level of vibration when making.
Preferably, oil pump noise method of testing is further comprising the steps of：
Five. it is completed, make vibrating sensor unit depart from oil pump to be measured；
Six. base bracing frame is moved upwards up to upper end and supports oil pump to be measured.
Preferably, described vibrating sensor unit, both is installed and is fixed on oil pump case to be measured.
Preferably, described vibrating sensor unit, installed by clip both and be fixed on oil pump case to be measured.
Preferably, described vibrating sensor unit is attached on oil pump case to be measured by the absorption affinity of Magnet.
Preferably, in step 3, support clamps air cylinder driven jaw clamping vibration sensor unit；Then push cylinder to
Front motion drives support gripper cylinder, jaw and vibrating sensor unit to move at oil pump case to be measured；Then support clamping
Air cylinder driven jaw opens release vibrating sensor unit, so that vibrating sensor unit is attached to by the absorption affinity of Magnet
On oil pump case to be measured；
In step 5, it is completed, push cylinder travels forward and drives support gripper cylinder, jaw to move to vibrating sensing
At device unit；Then support clamping air cylinder driven jaw closure clamping pickup vibrating sensor unit；Then push cylinder is backward
Motion, makes vibrating sensor unit depart from oil pump to be measured.
Preferably, the vibration signal of vibrating sensor unit passes after being amplified and filter through signal amplifier and wave filter
Deliver to signal acquisition module, the data vibration signal after processing is passed to host computer by signal acquisition module；
The data vibration signal that host computer is transmitted to signal acquisition module by software carries out order decomposition, according to number
Obtain noise order level during operation of oil pump to be measured according to the power of each order of vibration signal.
Preferably, described vibrating sensor unit includes a three-dimensional acceleration transducer；Three-dimensional acceleration transducer is defeated
The signal going out is as vibration signal；
Wave filter the vibration signal that signal amplifier sends is filtered process after, extract tangential 20hz～
As characteristic signal, the characteristic signal of extraction passes to signals collecting to 2khz, radial direction 20hz～2khz and axial 100hz～12khz
Module.
Preferably, the detection output signal of three-dimensional acceleration transducer is carried out 10～100 times of signal by signal amplifier
Amplify, the originally faint signal of telecommunication is enlarged into the fiduciary level signal that can be used for signals collecting.
The oil pump noise method of testing of embodiment eight, when preparing to carry out noise test to oil pump to be measured, base supports gas
The push rod of cylinder drives base bracing frame to move down, and so that oil pump to be measured is separated with base bracing frame and be in vacant state, test
When vibrating sensor unit output characterize operation of oil pump to be measured when level of vibration vibration signal, indirectly reflect operation of oil pump
When noise level.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement done etc., should be included within the scope of protection of the invention.
Claims (26)
1. a kind of oil pump noise test equipment is it is characterised in that it includes base bracing frame, base support cylinder, vibrating sensing
Device unit；
Oil pump upper end to be measured hangs to be fixed；
Described base bracing frame supports the flexible of ejecting rod of cylinder to move up and down with base；
When described base bracing frame moves to upper end, support described oil pump to be measured；
When described base bracing frame moves to lower end, oil pump to be measured separates with described base bracing frame and is in vacant state；
Described vibrating sensor unit, can combine installation and be fixed on oil pump case to be measured；
Described vibrating sensor unit, for detection output vibration signal.
2. oil pump noise test equipment according to claim 1 it is characterised in that
Described vibrating sensor unit includes acceleration transducer, Magnet, bracket；
Described acceleration transducer and Magnet are respectively mounted and are fixed on described bracket；
Oil pump case to be measured is magnetic conductive material；
Described vibrating sensor unit combines installation by the absorption affinity of Magnet and is fixed on oil pump case to be measured.
3. oil pump noise test equipment according to claim 2 it is characterised in that
Oil pump case to be measured is cylinder, and described vibrating sensor unit front end is circular arc with the mating surface of oil pump case to be measured
Face.
4. the oil pump noise test equipment according to Claims 2 or 3 it is characterised in that
Described Magnet is fixed on described bracket front end；
Described Magnet and described bracket front end collectively form the cooperation with oil pump case to be measured for the described vibrating sensor unit front end
Face.
5. the oil pump noise test equipment according to Claims 2 or 3 it is characterised in that
Described acceleration transducer is three-dimensional acceleration transducer.
6. oil pump noise test equipment according to claim 1 it is characterised in that
Oil pump noise test equipment also includes oil supply tank, guide pad, flange；
Described flange is used for being fixed on fuel tank；
Described oil groove is fixed on described flange；
Described guide pad is fixed on described oil groove outer wall；
Described base supports cylinder to be fixed on described flange, and described base supports the guide rail of the push rod of cylinder along described guide pad
Stretching motion.
7. oil pump noise test equipment according to claim 6 it is characterised in that
Described guide pad is drum guide pad.
8. oil pump noise test equipment according to claim 1 it is characterised in that
Oil pump noise test equipment also includes jaw, support gripper cylinder, push cylinder；
Described support gripper cylinder is fixed on the push rod of described push cylinder；
Described jaw clamps air cylinder driven by described support；
When preparing to carry out noise test to oil pump to be measured, described jaw closure clamps described vibrating sensor unit；When described
Base bracing frame moves down makes oil pump to be measured be in vacant state, and the push rod of described push cylinder stretches out, and drives support clamping
Cylinder, jaw push vibrating sensor unit to oil pump to be measured, and then support clamping air cylinder driven jaw is opened release vibration and passed
Sensor cell, so that the combination installation of vibrating sensor unit is fixed on oil pump case to be measured；Then described push cylinder
Push rod is retracted, and drives support gripper cylinder, jaw away from oil pump to be measured；
Carry out noise test to oil pump to be measured to finish, the push rod of described push cylinder stretches out, drive support gripper cylinder, jaw to move
It is fixed on the vibrating sensor unit on oil pump case to be measured to combination, then support clamping air cylinder driven jaw closure clamping institute
State vibrating sensor unit, then the push rod of described push cylinder is retracted, drive support gripper cylinder, jaw and vibrating sensor
Unit is moved upwards up to upper end and supports oil pump to be measured away from oil pump to be measured, then described base bracing frame.
9. oil pump noise test equipment according to claim 1 it is characterised in that
Described vibrating sensor unit, can be fixed on oil pump case to be measured in both installations.
10. oil pump noise test equipment according to claim 9 it is characterised in that
Described vibrating sensor unit, can be installed by clip both and be fixed on oil pump case to be measured.
11. oil pump noise test equipments according to claim 1 it is characterised in that
The vibration signal of vibrating sensor unit is amplified successively through signal amplifier and wave filter and is sent to letter after filtering
Number acquisition module, the data vibration signal after processing is passed to host computer by signal acquisition module；
The data vibration signal that host computer is transmitted to signal acquisition module by software carries out order decomposition, is shaken according to data
The power of each order of dynamic signal obtains noise order level during operation of oil pump to be measured.
12. oil pump noise test equipments according to claim 11 it is characterised in that
The vibration signal of vibrating sensor unit is sent to signal amplifier by shielded cable；
After signal amplifier will amplify, vibration signal is sent to wave filter by coaxial cable；
After wave filter is filtered to the vibration signal that signal amplifier sends processing, extract characteristic signal, the spy of extraction
Reference number passes to signal acquisition module by coaxial cable；
Data vibration signal after processing is passed to host computer by PXI industrial bus by signal acquisition module.
13. oil pump noise test equipments according to claim 11 it is characterised in that
Power supply is powered for oil pump to be measured by testing cable.
14. oil pump noise test equipments according to claim 11 it is characterised in that
Described vibrating sensor unit includes a three-dimensional acceleration transducer；The signal conduct of three-dimensional acceleration transducer output
Vibration signal；
After wave filter is filtered to the vibration signal that signal amplifier sends processing, extract tangential 20hz～2khz, footpath
To 20hz～2khz and axial 100hz～12khz as characteristic signal, the characteristic signal of extraction passes to signal by coaxial cable
Acquisition module.
15. oil pump noise test equipments according to claim 14 it is characterised in that
The signal that the detection output signal of three-dimensional acceleration transducer carries out 10～100 times is amplified by signal amplifier；
Wave filter passes through two 20hz～2khz to vibration signal, and 100hz～12khz filtering channel is filtered locating
Reason.
16. oil pump noise test equipments according to claim 11 it is characterised in that
Signal amplifier and wave filter are arranged in a device or are divided into two devices；
Before or after wave filter is placed in amplifier.
A kind of 17. oil pump noise method of testings it is characterised in that making oil pump to be measured be in vacant state, by vibrating sensor list
Unit is attached on oil pump case to be measured, and during beginning oil pump to be measured, described vibrating sensor unit detection output vibration signal characterizes and treats
The vibration signal of level of vibration when surveying operation of oil pump.
18. oil pump noise method of testings according to claim 17 are it is characterised in that comprise the following steps：
One. oil pump upper end to be measured is hung and fixes, lower end is supported by base bracing frame；
Two. drive base bracing frame to move down by the push rod that base supports cylinder, so that oil pump to be measured is divided with base bracing frame
From and be in vacant state；
Three. vibrating sensor unit is attached on oil pump case to be measured；
Four. oil pump to be measured is started working, when described vibrating sensor unit detection output vibration signal characterizes operation of oil pump to be measured
The vibration signal of level of vibration.
19. oil pump noise method of testings according to claim 18 it is characterised in that
Further comprising the steps of：
Five. it is completed, make vibrating sensor unit depart from oil pump to be measured；
Six. base bracing frame is moved upwards up to upper end and supports oil pump to be measured.
20. oil pump noise method of testings according to claim 17,18 or 19 it is characterised in that
Described vibrating sensor unit, both is installed and is fixed on oil pump case to be measured.
21. oil pump noise test equipments according to claim 20 it is characterised in that
Described vibrating sensor unit, is installed by clip both and is fixed on oil pump case to be measured.
22. oil pump noise method of testings according to claim 17,18 or 19 it is characterised in that
Described vibrating sensor unit is attached on oil pump case to be measured by the absorption affinity of Magnet.
23. oil pump noise method of testings according to claim 22 it is characterised in that
In step 3, support clamps air cylinder driven jaw clamping vibration sensor unit；Then push cylinder travels forward drive
Support gripper cylinder, jaw and vibrating sensor unit move at oil pump case to be measured；Then support clamping air cylinder driven folder
Pawl opens release vibrating sensor unit, so that vibrating sensor unit is attached to oil pump casing to be measured by the absorption affinity of Magnet
On body；
In step 5, it is completed, push cylinder travels forward and drives support gripper cylinder, jaw to move to vibrating sensor list
At unit；Then support clamping air cylinder driven jaw closure clamping pickup vibrating sensor unit；Then push cylinder rearward movement,
Vibrating sensor unit is made to depart from oil pump to be measured.
24. oil pump noise method of testings according to claim 17 it is characterised in that
The vibration signal of vibrating sensor unit is amplified through signal amplifier and wave filter and is sent to signal after filtering adopting
Collection module, the data vibration signal after processing is passed to host computer by signal acquisition module；
The data vibration signal that host computer is transmitted to signal acquisition module by software carries out order decomposition, is shaken according to data
The power of each order of dynamic signal obtains noise order level during operation of oil pump to be measured.
25. oil pump noise method of testings according to claim 24 it is characterised in that
Described vibrating sensor unit includes a three-dimensional acceleration transducer；The signal conduct of three-dimensional acceleration transducer output
Vibration signal；
After wave filter is filtered to the vibration signal that signal amplifier sends processing, extract tangential 20hz～2khz, footpath
To 20hz～2khz and axial 100hz～12khz as characteristic signal, the characteristic signal of extraction passes to signal acquisition module.
26. oil pump noise method of testings according to claim 24 it is characterised in that
The signal that the detection output signal of three-dimensional acceleration transducer carries out 10～100 times is amplified by signal amplifier.
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