CN107014588A - A kind of water jet transient impact method for testing pressure and device based on PVDF - Google Patents
A kind of water jet transient impact method for testing pressure and device based on PVDF Download PDFInfo
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- CN107014588A CN107014588A CN201710389996.3A CN201710389996A CN107014588A CN 107014588 A CN107014588 A CN 107014588A CN 201710389996 A CN201710389996 A CN 201710389996A CN 107014588 A CN107014588 A CN 107014588A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a kind of water jet transient impact method for testing pressure and device based on PVDF, device includes water pump, nozzle, motor, afterwards preceding cut-off disk, cut-off disk, target plate and computer；The import of described water pump is connected by pipeline with water tank, the outlet of water pump is connected by pipeline with nozzle, described motor, rear cut-off disk and target plate is arranged on testboard, the output shaft of motor is connected with preceding cut-off disk, target plate, preceding cut-off disk are parallel with rear cut-off disk, and corresponding to nozzle on preceding cut-off disk is provided with multiple through holes；Correspond to nozzle provided with a jet orifice on cut-off disk afterwards；Correspond to jet orifice on described target plate and be provided with pressure sensor, pressure sensor is connected with computer.The present invention is simple in construction, easy to operate；The present invention blocks continuous water jet using cut-off disk, and the transient impact effect of the water jet under a certain steady operation pressure can be tested.
Description
Technical field
The invention belongs to water jets impact pressure test technical field, a kind of water jet wink based on PVDF is specifically related to
State surge method of testing and device.
Background technology
High pressure water jet is a kind of using the pump housing as power source, using high-velocity flow as energy carrier, is ultimately applied to target
A kind of broken new technique of physics is carried out on body.In view of high-pressure water jet be used for material it is broken with efficient, dustless, low-heat and
The characteristics such as low vibration, in recent decades the technology be widely used in industry cleaning link, surface derusting, Rock cutting, mine and opened
Adopt and the engineering field such as oil-gas drilling.
Rock Fragmentation by High-Pressure Jet is an important application branch of the technology, available for underground coal mine hydraulic mining with
In terms of petroleum gas jet drilling.Water jet can be divided into two stages, i.e. initial breaking apart rank to the impact grinding of rock
Section and Crack Extension stage in later stage.Lot of experiments shows that the impact dynamics of the formation needs of rock initial breaking apart core is much
More than dynamics needed for catalase later stage Crack Extension.Water jet why can efficiency crushing rock, be because water jet punching
Huge surge-the water hammer pressure of generation can be induced by hitting the initial instant of target body, and the pressure peak is up to stable impact pressure
Decades of times, but the duration is very of short duration, generally in the microsecond order of magnitude.
Therefore, the accurate transient impact pressure for grasping water jet is to efficiently instructing rock breaking by water jet to have highly important meaning
Justice.The surge of water jet mainly is tested by the way of Venturi tube at present, but which can only test Jet Flow Field
In pressure, the surge suffered by target body under impinging jet can not be directly obtained.On the other hand, the transient state punching of water jet
Hitting pressure has a characteristic that intensity is big, the time is short, and general monitoring sensor is difficult to meet that this response time is short, measurement range
Extensively, the high requirement of reliability.Paper《Water jets impact transient state dynamic characteristics and rock breaking mechanism research》Sensed using PVDF thin film
Device monitors the surge of water jet, for water jet transient impact pressure test provides a kind of new approaches.But the paper
The method of testing of middle proposition is remained in two important defects：（1）Continuous water jet is blocked using single cut-off disk easy
Cause to block the defects such as water-jet flow structure is asymmetric, convergence is bad；（2）High-pressure water jet is directly impacted in PVDF thin film,
On the one hand sensor construction is easily damaged, the small electric charge signal stream being on the other hand easily caused in PVDF thin film is lost.In addition, by
Text《Water jets impact transient state dynamic characteristics and rock breaking mechanism research》Also there is jet-core region and target body in the test system of middle proposition
The problems such as center hardly possible alignment, nozzle and target body spacing hardly possible are adjusted.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of simple in construction, easy to operate, not only can accurately test
The surge of pure water jets, it may also be used for test abradant jet, the transient impact pressure of jet such as gas jet based on
PVDF water jet transient impact pressure test device and method.
The technical solution adopted by the present invention is：The technical solution adopted by the present invention is：A kind of water jet wink based on PVDF
State surge test device, including water pump, nozzle, motor, afterwards preceding cut-off disk, cut-off disk, target plate and computer；Described water
The import of pump is connected by pipeline with water tank, and the outlet of water pump is connected by pipeline with nozzle, described motor, rear cut-off disk and
Target plate is arranged on testboard, and the output shaft of motor is connected with preceding cut-off disk, and target plate, preceding cut-off disk are parallel with rear cut-off disk, preceding
End and correspond to nozzle on disk provided with multiple through holes, multiple through holes are evenly distributed in the circumferential direction；Correspond to spray on cut-off disk afterwards
Mouth is provided with a jet orifice；Correspond to jet orifice on described target plate and be provided with pressure sensor, pressure sensor connects with computer
Connect.
In the above-mentioned water jet transient impact pressure test device based on PVDF, described water pump uses plunger
Pump, pressure sensor uses PVDF piezoelectric transducers.
In the above-mentioned water jet transient impact pressure test device based on PVDF, testboard is provided with slide rail, described
Motor, rear cut-off disk and target plate are arranged on the slide rail of testboard.
In the above-mentioned water jet transient impact pressure test device based on PVDF, described PVDF pressure sensors include
Upper lid and PVDF thin film, upper lid are arranged on the round boss of target plate provided with the groove for accommodating PVDF thin film, PVDF thin film, on
Lid is covered PVDF thin film by groove, and carries out pretension processing to upper lid by bolt；Upper cover sets towards on the end face of boss
There is the metallic channel of communication groove, the wire of PVDF thin film is drawn from metallic channel.
In the above-mentioned water jet transient impact pressure test device based on PVDF, the outlet of water pump is linked back by a pipeline
Water tank, the pipeline is provided with overflow valve.
In the above-mentioned water jet transient impact pressure test device based on PVDF, set on the pipeline that water pump is connected with nozzle
There is pressure gauge.
A kind of water jet transient impact pressure using the above-mentioned water jet transient impact pressure test device based on PVDF
Force test method, comprises the following steps：
（1）Assemble the water jet transient impact pressure test device based on PVDF；
（2）PVDF sensors are arranged on target plate；
（3）Adjust nozzle height so that the center of nozzle center and the jet orifice on rear cut-off disk point-blank, and causes
Before jet orifice is centrally located on cut-off disk on the pitch circle of multiple through holes；Then by disk before rotating, through hole is allowed to avoid nozzle center；
（4）The position of cut-off disk and target body before regulation so that nozzle and the preceding distance by disk are 3mm, end after regulation disk with
The position of target body so that the distance between rear cut-off disk and target body are 3mm；
（5）Computer is opened, water pump is opened, by the work pump pressure regulation of water pump to 10MPA, motor is opened after keeping stabilization so that
Water jet is truncated as multiple pulsing jets；
（6）Data acquisition is carried out to pressure sensor, surge curve map is obtained；
（7）Gradually the pump pressure of reduction water pump is until close, analyzing and processing data.
Compared with prior art, the invention has the advantages that：
（1）The present invention cut-off disk and rear cut-off disk one before work to block continuous water jet, a certain stable work of acquisition
Making blocking under pressure, water jet Stability Analysis of Structures, convergence are good, can accurately realize the water jet under a certain steady operation pressure
Transient shock test.
（2）The present invention can directly obtain High Pressure Pure Water jet, high pressure using PVDF piezoelectric transducers test surge
Shock loading suffered by the lower target plate of the impact such as abradant jet, high-voltage pulse jet；The sample frequency of capture card of the present invention can be with
Up to 1MHZ, thus the sampling time can be as accurate as the microsecond order of magnitude, can be gone out with Validity Test transient impact pressure change rule
Rule.
（3）The present invention is using reeded upper lid and the boss installation PVDF thin film edge on target plate is set, while PVDF is believed
The wire of number transmission is sealed in the metallic channel of lid, it is to avoid the problem of PVDF thin film is damaged by water jets impact, simultaneously
Ensure the accuracy of signal transmission.
（4）The present invention determines the position of nozzle, cut-off disk and target body using rail plate, with accurate positioning, operation
Easily a little.
（5）The water jet transient impact pressure test device based on PVDF of the present invention also has simple in construction, operation side
Just advantage.
Brief description of the drawings
Fig. 1 is the structure chart of the water jet transient impact pressure test device based on PVDF of invention.
Fig. 2 is the structure chart of the preceding cut-off disk of the water jet transient impact pressure test device based on PVDF of the present invention.
Fig. 3 is the front view at the sensor of the water jet transient impact pressure test device based on PVDF of the present invention.
Fig. 4 is the sectional view at the sensor of the water jet transient impact pressure test device based on PVDF of the present invention.
Fig. 5 is water jet transient impact pressue-graph.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
As Figure 1-Figure 4, the water jet transient impact pressure test device of the invention based on PVDF include water pump 2,
Nozzle 8, testboard 5, motor 6, preceding cut-off disk 9, rear cut-off disk 10, target plate 12 and computer 14；Described water pump 2 is used
Plunger pump, the import of water pump 2 is connected by pipeline with water tank 1, and the outlet of water pump 2 is connected by pipeline with nozzle 8, on the pipeline
Provided with pressure gauge 4.The outlet of water pump 2 is linked back water tank 1 by a pipeline, and the pipeline is provided with overflow valve 3.
Described testboard 5 is provided with slide rail 7, and described motor 6, rear cut-off disk 10 and target plate 12 is arranged on testboard
On slide rail 7, motor 6, rear cut-off disk 10 and target plate 12 can be moved on slide rail 7, to adjust motor 6, rear cut-off disk 10 and
The position of target plate 12.
The output shaft of motor 6 is connected with preceding cut-off disk 9, and cut-off disk 9 can be driven to rotate.Target plate 12, preceding cut-off disk 9 are with after
End disk 10 parallel, correspond to nozzle provided with four through holes 16 on preceding cut-off disk 9；Four through holes 16 along the circumferential direction uniform cloth
Put.Correspond to nozzle on cut-off disk 10 afterwards provided with a jet orifice 17, the diameter of jet orifice 17 is less than the diameter of through hole 16.It is described
Target plate 12 on correspond to after cut-off disk 10 on jet orifice 17 be provided with pressure sensor, pressure sensor by capture card 13 with
Computer 14 is connected.
Described pressure sensor uses PVDF piezoelectric transducers, including upper lid 11 and PVDF thin film 19, upper lid 11
Provided with the circular groove 22 for accommodating PVDF thin film 19, PVDF thin film 19 is arranged on the round boss 23 of target plate 12, upper lid 11
PVDF thin film 19 is covered by groove 22, and pretension processing is carried out to upper lid 11 by the bolt in mounting hole 21.Upper lid 11
The metallic channel 20 of groove is communicated with towards the end face of boss 23, the metallic channel 20 of wire from the upper lid 11 of PVDF thin film 19 is led
Go out, be connected to capture card 13.
A kind of water jet transient impact method for testing pressure based on PVDF, comprises the following steps：
（1）According to the overall connection diagram connecting test device of water jet transient impact pressure testing system；
（2）On the boss 23 that PVDF thin film 19 is arranged on to target plate 12, and upper lid 11 is covered in PVDF thin film 19, regulation is pre-
Tight bolt makes lid 11 be close in PVDF thin film 19；
（3）Adjust the height of nozzle 8 so that the center of nozzle 8 is with the center of jet orifice 17 on rear cut-off disk 10 in straight line
On, and jet orifice 17 is ended on disk before being centrally located on the pitch circle of four through holes 16；Then by disk 9 before rotating, allow logical
Avoid the center of nozzle 8 in hole 16；
（4）The position of regulation cut-off disk and target body so that nozzle ends between disk and target body with being 3mm by the distance of disk
Distance is 3mm；
（5）Computer is opened, surge test collection analysis software is opened, processing is zeroed out, by sensor trigger collection side
Formula is changed to manual triggering；
（6）Opening plunger pump, will work pump pressure regulation to 10MPA by overflow valve, and open motor after keeping stabilization so that water-jet
Stream is truncated as multiple pulsing jets；
（7）Manual click-sensor gathers button, and the data to pressure sensor are acquired, so as to obtain rushing shown in Fig. 5
Hit pressue-graph；
（8）Gradually the pump pressure of reduction water pump is until close, analyzing and processing data.
Claims (8)
1. a kind of water jet transient impact pressure test device based on PVDF, it is characterized in that：Including water pump, nozzle, motor, preceding
End disk, afterwards cut-off disk, target plate and computer；The import of described water pump is connected by pipeline with water tank, and the outlet of water pump leads to
Piping is connected with nozzle, and described motor, rear cut-off disk and target plate is arranged on testboard, the output shaft of motor and preceding cut-off
Disk is connected, and target plate, preceding cut-off disk are parallel with rear cut-off disk, and corresponding to nozzle on preceding cut-off disk is provided with multiple through holes, multiple through holes
It is evenly distributed in the circumferential direction；Correspond to nozzle provided with a jet orifice on cut-off disk afterwards；Correspond to jet on described target plate
Hole is provided with pressure sensor, and pressure sensor is connected with computer.
2. the water jet transient impact pressure test device according to claim 1 based on PVDF, it is characterized in that：Preceding cut-off
Correspond to nozzle on disk provided with four through holes；The diameter of described jet orifice is less than the diameter of through hole.
3. the water jet transient impact pressure test device according to claim 1 based on PVDF, it is characterized in that：Described
Water pump uses plunger pump, and pressure sensor uses PVDF piezoelectric transducers.
4. the water jet transient impact pressure test device according to claim 1 based on PVDF, it is characterized in that：Testboard
Slide rail is provided with, described motor, rear cut-off disk and target plate is arranged on the slide rail of testboard.
5. the water jet transient impact pressure test device according to claim 2 based on PVDF, it is characterized in that：PVDF is pressed
Force snesor includes upper lid and PVDF thin film, and upper lid is arranged on target plate provided with the groove for accommodating PVDF thin film, PVDF thin film
On round boss, upper lid is covered PVDF thin film by groove, and carries out pretension processing to upper lid by bolt；It is upper to cover towards convex
The metallic channel of groove is communicated with the end face of platform, the wire of PVDF thin film is drawn from metallic channel.
6. the water jet transient impact pressure test device according to claim 1 based on PVDF, it is characterized in that：Water pump
Outlet is linked back water tank by a pipeline, and the pipeline is provided with overflow valve.
7. the water jet transient impact pressure test device according to claim 1 based on PVDF, it is characterized in that：Water pump with
The pipeline of nozzle connection is provided with pressure gauge.
8. the water jet transient impact pressure test based on PVDF in a kind of utilization claim 1-7 described in any claim
The water jet transient impact method for testing pressure of device, comprises the following steps：
（1）Assemble the water jet transient impact pressure test device based on PVDF；
（2）PVDF sensors are arranged on target plate；
（3）Adjust nozzle height so that the center of nozzle center and the jet orifice on rear cut-off disk point-blank, and causes
Before jet orifice is centrally located on cut-off disk on the pitch circle of multiple through holes；Then by disk before rotating, through hole is allowed to avoid nozzle center；
（4）The position of cut-off disk and target body before regulation so that nozzle and the preceding distance by disk are 3mm, end after regulation disk with
The position of target body so that the distance between rear cut-off disk and target body are 3mm；
（5）Computer is opened, water pump is opened, by the work pump pressure regulation of water pump to 10MPA, motor is opened after keeping stabilization so that
Water jet is truncated as multiple pulsing jets；
（6）Data acquisition is carried out to pressure sensor, surge curve map is obtained；
（7）Gradually the pump pressure of reduction water pump is until close, analyzing and processing data.
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|---|---|---|---|---|
| CN108362477A (en) * | 2018-02-08 | 2018-08-03 | 重庆大学 | A kind of ickings mixed liquor floods lower ultra-high pressure water fluid jet dynamic impact problem Performance Measurement System and method |
| CN108760364A (en) * | 2018-05-17 | 2018-11-06 | 江苏大学 | A kind of intelligent closestool sprinkler performance test system and test method |
| CN109459179A (en) * | 2018-11-27 | 2019-03-12 | 西安近代化学研究所 | A kind of monomer effect target assembly suitable for moving quick-fried field target shock wave pressure measurement |
| CN109459178A (en) * | 2018-11-27 | 2019-03-12 | 西安近代化学研究所 | A kind of disjunctor effect target assembly suitable for moving quick-fried field target shock wave pressure measurement |
| CN109489878A (en) * | 2018-11-12 | 2019-03-19 | 江南大学 | A kind of Fluid pressure field measurement device and method |
| CN109520702A (en) * | 2018-12-28 | 2019-03-26 | 大连工业大学 | A kind of aquatic products water jet force parameter test method and its experimental rig |
| CN111458267A (en) * | 2019-01-22 | 2020-07-28 | 哈尔滨工业大学 | Testing device and testing method for resistance reduction performance of super-hydrophobic surface |
| CN111964884A (en) * | 2020-07-27 | 2020-11-20 | 江苏大学 | Performance test system for swirl nozzle |
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| CN109459178A (en) * | 2018-11-27 | 2019-03-12 | 西安近代化学研究所 | A kind of disjunctor effect target assembly suitable for moving quick-fried field target shock wave pressure measurement |
| CN109459179A (en) * | 2018-11-27 | 2019-03-12 | 西安近代化学研究所 | A kind of monomer effect target assembly suitable for moving quick-fried field target shock wave pressure measurement |
| CN109459178B (en) * | 2018-11-27 | 2020-08-21 | 西安近代化学研究所 | Conjoined effect target device suitable for dynamic explosion field target shock wave pressure measurement |
| CN109459179B (en) * | 2018-11-27 | 2020-08-21 | 西安近代化学研究所 | Monomer effect target device suitable for dynamic explosion field target shock wave pressure measurement |
| CN109520702A (en) * | 2018-12-28 | 2019-03-26 | 大连工业大学 | A kind of aquatic products water jet force parameter test method and its experimental rig |
| CN111458267A (en) * | 2019-01-22 | 2020-07-28 | 哈尔滨工业大学 | Testing device and testing method for resistance reduction performance of super-hydrophobic surface |
| CN111964884A (en) * | 2020-07-27 | 2020-11-20 | 江苏大学 | Performance test system for swirl nozzle |
| CN112050854A (en) * | 2020-09-02 | 2020-12-08 | 中北大学 | Impact jet flow pressure vibration composite measurement device and impact jet flow pressure vibration composite measurement method |
| CN114323155A (en) * | 2022-01-07 | 2022-04-12 | 河南理工大学 | Submerged pulse jet pulse parameter testing device and testing method |
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